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Pro-MEC

Vacuum Circuit Breakers Vacuum Interrupter

Vacuum Circuit Breaker & Vacuum Interrupter

LSIS Pro-MEC VCB is user-friendly to give more convenience and safety by providing high speed interrupting time (3cycles), adopting the rapid auto-reclosing method, and having wide range of accessories.

7.2kV Draw-out (F class)

24kV Draw-out (F class)

Ratings H1-4

Constructional and operating characteristics H1-8

Control circuit diagram H1-9

7.2kV dimension H1-10

12kV dimension H1-19

17.5kV dimension H1-24

24kV dimension H1-27

Accessories H1-35

Types and ordering information H1-40

Vacuum Circuit Breaker

Features & Ordering information H1-43

VI internal structure H1-44

Basic functions and interrupting action H1-45

VI endurance by interrupting current H1-46

Dimensions H1-48

Technical data H1-50

Vacuum Interrupter

Pro-MEC VCB/VI

H1Contents

� Key Lock

� Padlock of earthing switch

� Button padlock

� Position switch of the earthing switch

� Button cover

� Locking coil of earthing switch

� Position switch (Cell switch)

� Shutter padlock

� Preparatory trip coil (Secondary trip coil)

� MOC (Mechanically operated cell switch)

� Latch checking switch

� TOC (Truck operated cell switch)

� Charge indicator

� Code plate (Miss insertion prevention)

� Position padlock

� Capacitor trip device

� Earthing switch Note 1)

� Rectifier

Note 1) The earthing switch is not available for 17.5kV VCB.

Wide range of accessories (optional)

LSIS Pro-MEC VCB is user-friendly to give more convenience

and safety by providing high speed interrupting time (3cycles),

adopting the rapid auto-reclosing method, and having

wide range of accessories.

7.2kV Draw-out (F class)24kV Draw-out (F class)

Vacuum Circuit BreakerVacuum Circuit Breaker

H1-2

High reliability of the operating mechanism- Separate design of the main circuit from theoperating mechanism.

- Adopt the toggle link method.- Improved the reliability of electric circuit.- Adopt the rapid auto-reclosing method as a standard option. (O-0.3sec.-CO-3min.-CO)

�Make short of the interrupting time. (3cycles)

�Increase the rated short-circuit withstand

characteristics. (1sec. to 3sec.)

�Reinforce the insulation in the conduct, by adopting the

molded housing in each phase.

�Built in the device making the contacts open first when

draw in and out.

�Adopt the tulip-shape connection between the cradle and

the VCB.

High interrupting performance Great operational safety

Compasion table for VCB (Short circuit test)[ ]

Compasion table for VCB (Short circuit test)

VACUUM CIRCUIT BREAKER

H1-3

H1-4

Ratings

Vacuum Circuit Breaker

Type LVB-06��-32D LVB-06��-40D

Rated voltage (kV) 7.2 7.2

Rated normal current (A) 1250 2000 3150 1250 2000 3150

Rated frequency (Hz) 50/60 50/60

Rated short-circuit breaking current (kA) 31.5 40

Rated short-circuit breaking capacity (MVA) 390 500

Rated short-time withstand current (kA/3sec) 31.5 40

Rated short-circuit making current (kAp) 82 104

Rated breaking time (Cycle) 3 3

Rated opening time (sec) ≤ 0.04 ≤ 0.04

No-load closing time (sec) ≤ 0.06 ≤ 0.06

Withstand Power frequency (kV/min) 20 20

voltage Impulse (kV/1.2×50㎲) 60 60

Rated operating sequence O-0.3s-CO-3min-CO O-0.3s-CO-3min-CO

TypeMechanical M2 (10,000 times) M2 (10,000 times)

testElectrical E2 (List1) E2 (List1)

Capacitive current switching Note 1) C2 C2

MechanicalWithout maintenance (Time) 20000 20000

LifetimeMaintenance (Time) 30000 30000

ElectricalWithout maintenance (Time) 20000 20000

Maintenance (Time) 30000 30000

Auxiliary switch 4a4b, 10a10b 4a4b, 10a10b

Fixed Visible, Fixed Visible, Fixed Visible, Fixed Visible, Fixed

E-type Visible, Tulip Visible, Clip Visible, Tulip Visible, Tulip

InstallingDraw-out

F-type Visible, Tulip Visible, Tulip Visible, Tulip Visible, Tulip

methodtype G-type Note 2)

- Visible, Tulip Visible, Tulip Visible, Tulip Visible, Tulip

T Enclosed, Tulip - Enclosed, Tulip -

M-type Enclosed, Tulip - Enclosed, Tulip -

E-type (kg) 131.5 134.5 210 135 138 210

VCB F-type (kg) 132.5 135.5 211 136 139 211

Weight G, M-type (kg) 132.5(159) 135.5(160) 220 136(162.5) 139(163.5) 220

Note 3) E-type (kg) 52 60 131 52 60 131

Cradle F-type (kg) 54.5 62.5 135 54.5 62.5 135

G-type (kg) 62.5(110) 135(117) 155 62.5(110) 135(117) 155

Applied standard IEC 62271-100 IEC 62271-100

Test laboratory KERI Note 4) � �

Note 1) Applied cable-charging current switching test2) In the event of ordering Enclosed Tulip type for G class VCB, please add “T” in the end of type name. (Ex: LVB-06G-20D/06-1A2B-T)3) ( )* indicates the weight of Enclosed Tulip installing method VCB.4) KERI: Korea Electrotechnology Research Institute

▲ Enclosed VCB(Draw-out type, G-type)

▲ G-type Cradle(Enclosed, Tulip contact)

▲ Visible, Clip contact ▲ Visible, Tulip contact ▲ Enclosed, Tulip contact

H1-5

Type LVB-12��-32D/12, 20-T, 30 LVB-12��-40D/12, 20, 30 LVB-17��-40D/12, 20, 30

Rated voltage (kV) 12 12 17.5

Rated normal current (A) 1250 2000 3150 1250 2000 3150 1250 2000 3150

Rated frequency (Hz) 60(E1,E2,C2: PT & T) 50(E1,C2:KEMA), 60(M2,E2,C2: PT & T) 60

Rated short-circuit breaking current (kA) 31.5 40 40

Rated short-circuit breaking capacity (MVA) 650 831 1200

Rated short-time withstand current (kA/3sec) 31.5 40 40

Rated short-circuit making current (kAp) 81.9 104 104

Rated breaking time (Cycle) 3 3 3

Rated opening time (sec) 0.04 0.04 ≤0.04

No-load closing time (sec) 0.06 0.06 ≤0.06

Withstand Power frequency (kV/min) 28 28 38

voltage Impulse (kV/1.2×50㎲) 75 75 95

Rated operating sequence O-0.3s-CO-3min-CO O-0.3s-CO-3min-CO O-0.3s-CO-3min-CO

TypeMechanical M2 (10,000 times) M2 (10,000 times) M2 (10,000 times)

test Electrical E2 (List 1) E2 (List 1) E2 (List 1)

Capacitive current switching Note) C2 C2 C2

MechanicalWithout maintenance (Time) 20,000 20,000 20,000

LifetimeMaintenance (Time) 30,000 30,000 30,000

ElectricalWithout maintenance (Time) 20,000 20,000 20,000

Maintenance (Time) 30,000 30,000 30,000

Auxiliary switch 4a4b, 10a10b 4a4b, 10a10b 4a4b, 10a10b

Fixed - - -

Installing E-TYPE - - -

Method Draw-out F-TYPE - - -

type G-TYPE Enclosed, Tulip Visible, Tulip Enclosed, Tulip Visible, Tulip Visible, Tulip

M-TYPE Enclosed, Tulip - - -

E-TYPE (kg) - - -

VCB F-TYPE (kg) - - -

WeightG, M-TYPE (kg) 159 160 220 162 163 220 200 205 260

E-TYPE (kg) - - - - - - - - -

Cradle F-TYPE (kg) - - - - - - - - -

G, M-TYPE (kg) 110 117 155 110 117 155 175 175 200

Applied standard IEC 62271-100

Test laboratory PT & T: E1, E2, C2, M2 KEMA, PT & T

Note) Applied cable-charging current switching test

H1-6

Vacuum Circuit Breaker

Ratings

H1-6

▲ Fixed type VCB ▲ E-type cradle ▲ F-type cradle ▲ G-type cradle(Withdrawable by screw)

▲ G-type cradle(Withdrawable by lever)

Type LVB-20��-13D LVB-20��-13D/T LVB-20��-16D LVB-20��-16D/T LVB-20��-25D LVB-20��-25D/T

Rated voltage (kV) 24 24 24

Rated normal current (A) 630 630 630

1250 1250 1250

2000

Rated frequency (Hz) 50/60 50/60 50/60

Rated short-circuit breaking current (kA) 12.5 16 25

Rated short-circuit breaking capacity (MVA) 520 665 1000

Rated short-time withstand current (kA/3sec) 12.5 16 25

Rated short-circuit making current (kAp) 32.5 40 65

Rated breaking time (Cycle) 3 3 3

Rated opening time (sec) ≤ 0.04 ≤ 0.04 ≤ 0.04

No-load closing time (sec) ≤ 0.06 ≤ 0.06 ≤ 0.06

Withstand Power frequency (kV/min) 50 50 50

voltage Impulse (kV/1.2×50㎲) 125 125 125

Rated operating sequence O-0.3s-CO-3min-CO O-0.3s-CO-3min-CO O-0.3s-CO-3min-CO

TypeMechanical M2(10,000 times) M2(10,000 times) M2(10,000 times)

testElectrical E2 (List1) E2 (List1) E2 (List1)

Capacitive current switching Note 1) C2 C2 C2

MechanicalWithout maintenance (Time) 20000 20000 20000

LifetimeMaintenance (Time) 30000 30000 30000

ElectricalWithout maintenance (Time) 20000 20000 20000

Maintenance (Time) 30000 30000 30000

Auxiliary switch 4a4b, 10a10b 4a4b, 10a10b 4a4b, 10a10b

Fixed Visible, Fixed - Visible, Fixed - Visible, Fixed -

E-type Visible, Clip Enclosed, Tulip Visible, Clip Enclosed, Tulip Visible, Clip Enclosed, TulipInstalling

Draw-out F-type Visible, Clip Enclosed, Tulip Visible, Clip Enclosed, Tulip Visible, Clip Enclosed, Tulipmethod

type G-type Note 2) Visible, Tulip Enclosed, Tulip Visible, Tulip Enclosed, Tulip Visible, Tulip Enclosed, Tulip

M-type - Enclosed, Tulip - Enclosed, Tulip - Enclosed, Tulip

E-type (kg) 145 145 145 145 145 145

VCB F-type (kg) 145 145 145 145 145 145

WeightG, M-type (kg) 155 187 155 187 155 187/218 (2000A)

E-type (kg) 80 80 80 80 80 80

Cradle F-type (kg) 82 82 82 82 82 82

G-type (kg) 110 120 110 120 110 120

Applied standard IEC 62271-100 IEC 62271-100 IEC 62271-100

Test laboratory KERI � - �

KEMA - � �

Note 1) Applied cable-charging breaking current2) In the event of ordering Enclosed Tulip type for G class VCB, please add “T” in the end of type name. (Ex: LVB-06G-20D/06-1A2B-T)

H1-7H1-7

VCB

ON

OFF

“a” contact

ON

OFF

“b”contact

OFF

ON

Motor

Closing Coil (C)The coil operated only when the power is applied continuouslyover 45ms. It has built-in electrically anti-pumping circuit.

��Position of the Aux.contact switch

Note 1) Range of the normal operating voltage: 85~110%2) DC 24V is the underdeveloped rating.

Shunt coil (TC)When the VCB is 'ON' position, even though the control powerof a shunt coil is 'OFF', the VCB maintains the 'ON' position.

Note 1) Range of the normal operating voltage: 70~110%2) DC 24V is the underdeveloped rating.

Auxiliary switchStandard 4a4b / Optional 10a10b

Charge indicator ofthe closing springIndicating the condition of the closing spring.

Position indicator of the main contactsIndicating the 'Close' or the 'Open' of the main contacts.Close position: ��ON�� Open position: ��OFF��

CounterMechanically counts the switching of the VCB by 5digits analog type counter (Standard option)

Charged Discharged

Close position Open position

When the closing spring is charged, the control power of motor is turned off by the built-in limit s/w.

Note 1) Range of the normal operating voltage: 85~110%2) DC 24V is the underdeveloped rating.

Note) The contact capacity of the following accessories are the same with that of the Aux. switch. Position switch, Closing springcontact, Charging complete indicating contact, Position switch of the earthing switch, Mechanically operated cell switch,Truck operated cell switch.

The peak value of the Consumption Charging timeRated voltage

inrush current (A)Rated current (A)

power (W) (Sec.)

DC 48V 21 4 350 13

DC 110V 20 3 330 12

DC 125V 20 3 330 12

DC 220V 17 2.6 374 12

ClassificationGeneral Inductive Contact load (A) load (A) configuration

AC250V 10 5

125V 10 5

Contact Ratings 250V 10 5 4a4b

DC 125V 10 5 10a10b

30V 10 5

Rated voltage Rated current (A)

DC 48V 6

DC 110V 3

DC 125V 3

DC 220V 2.5

Rated voltage Rated current (A)

DC 48V 6

DC 110V 3

DC 125V 3

DC 220V 2.5

H1-8

Vacuum Circuit Breaker

H1-8

Constructional and operating characteristics

Manual chargeInsert the charge handle into the manual charge hole in the front of aVCB, and rotate it to clockwise over 40times and the chargecomplete with a metal sound.

Motor chargeIf you apply the control power to a VCB, the closing spring will becharged automatically by a motor and then the control power will beturned off by the built-in limit s/w. Please use the same controlvoltage for motor, Closing coil, Trip coil.

Sequence of the switching mechanism

①

②

③

④

⑤

⑥

⑦

⑧

⑨

⑩

⑪

①① Charge Indicator of the closing spring

②② Close button

③③ Key lock (Optional)

④④ Trip button

⑤⑤ Manual charge hole

⑥⑥ Position indicator of the main contacts

⑦⑦ Counter

⑧⑧ Screw hole for draw-in and draw-out

⑨⑨ Nameplate

⑩⑩ Mounting hole

⑪⑪ Safety cover

H1-9H1-9

Control circuit diagram

∅: E

xter

nal t

erm

inal

of V

CB

52: V

acuu

m c

ircui

t bre

aker

M: S

prin

g ch

argi

ng m

otor

TC: T

rip c

oil

TC1:

Sec

onda

ry T

rip c

oil

C: C

losi

ng c

oil

Y: A

nti-p

ump

rela

y52

a: A

uxilia

ry s

witc

h (N

O)

52b:

Aux

iliary

sw

itch

(NC

)LS

1: C

losi

ng in

terlo

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mit

switc

h (o

nly

with

draw

able

type

)LS

2: M

otor

sto

ppin

g, c

losi

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prin

g ch

arge

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dica

tion

LS3:

Ant

i-clo

sing

, ant

i-pum

ping

lim

it sw

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LCS

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peni

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king

sw

itch(

prev

entin

g cl

osin

gun

less

the

trip

latc

h is

pro

perly

rese

t)LS

4, L

S5:

Pos

ition

s/w

(clo

se in

test

pos

ition

)LS

6, L

S7:

Pos

ition

s/w

(clo

se in

run

posi

tion)

Not

e 1)

LC

S1: L

atch

che

ckin

g sw

itch

2) T

rip c

oil s

uper

visi

on (T

rip c

oil m

onito

ring

cont

act)

3) P

ositio

n sw

itch:

4a

(Ter

min

al N

o.: 1

, 2, 3

, 4, 5

, 6, 7

, 8)

4) T

C1:

Sec

onda

ry tr

ip c

oil (

Prep

arat

ory

trip

coil T

erm

inal

No.

: 82,

83)

5) I

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CB,

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(Clo

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Opt

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Con

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term

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ange

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t

B Ty

peA

Type

H1-10H1-10

Vacuum Circuit Breaker

7.2kV dimension (VCB)

LVB-06P-32D, 40D (Visible, Fixed) - (1250/2000A)

LVB-06P-32D, 40D (Visible, Fixed) - (3150A)

��Top

��Top

��Side��Front

��Side��Front

*125.5 applied to all 7.2kV VCB.

<Terminal conductor>

(Unit: mm)

H1-11H1-11

LVB-06E, F, G-32D, 40D E, F, G class - (1250/2000A)

LVB-06G- 32D/T, 40D/T G class (Enclosed, Tulip contact) - (1250/2000A)

��Side��Front

��Top

��Side��Front

<Terminal conductor>

(Unit: mm)

H1-12

Vacuum Circuit Breaker

7.2kV dimension (VCB)

H1-12

LVB-06E-32D, 40D E class (Visible, Tulip contact) - (3150A)

��Side��Front

LVB-06F-32D, 40D F class (Visible, Tulip contact) - (3150A)

��Side��Front

��Top

��Top

(Unit: mm)

H1-13H1-13

LVB-06G-32D, 40D G class (Visible, Tulip contact) - (3150A)

��Side��Front

��Top

(Unit: mm)

H1-14

LCL-06E-32D, 40D E class (Visible, Tulip contact) - (3150A)

��Side ��Top��Front

LCL-06E-32D, 40D E class (Visible, Tulip contact)

��Front

��Top<Terminal conductor>

(Unit: mm)

��Side

Rating 1250A 2000A

A 10 20

Vacuum Circuit Breaker

H1-14

7.2kV dimension (Cradle)

H1-15H1-15

LCL-06F-32D, 40D F class (Visible, Tulip contact) - (3150A)��Side��Front

��Top

LCL-06F-32D, 40D F class (Visible, Tulip contact) - (1250/2000A)

��Front

��Top

<Terminal conductor>

(Unit: mm)

��Side

Rating 1250A 2000A

A 10 20

H1-16

Vacuum Circuit Breaker

7.2kV dimension (Cradle)

H1-16

LCL-06G-32D, 40D G class(Visible, Tulip contact) - (31.5/40kA 1250/2000A)

��Side��Front

��Top

<Terminal conductor>

(Unit: mm)

Rating 1250A 2000A

A 10 20

H1-17H1-17

LCL-06G-20D/T, 25D/T, 32D/T, 40D/T G class (Enclosed, Tulip contact) - (630/1250/2000A)

��Side��Front

��Top<Terminal conductor>

(Unit: mm)

Rating31.5/40kA

1250A 2000A

A 12 25

B ∅48

H1-18

Vacuum Circuit Breaker

7.2kV dimension (Cradle)

H1-18

LCL-06G-32D, 40D G class (Visible, Tulip contact) - (3150A)(Unit: mm)

��Side

��Top<Terminal conductor>

<User busbar reguirement>

*To connect with VCB’s bushing terminalsuser busbar should have below dimensionsand two holes.

H1-19H1-19

��Top

12kV dimension (VCB)

LVB-12G-32D/T G class (Enclosed, Tulip contact) - (1250/2000A)

LVB-12G-40D G class (Enclosed, Tulip contact) - (1250/2000A)

(Unit: mm)

��Side��Front

470

668

496

150 150

549

726.

5

295

330325

33.5 10288

438

69

355

40kA 1250/2000A G class

��Side��Front

H1-20

Vacuum Circuit Breaker

12kV dimension (VCB)

LVB-12G-40D G class (Enclosed, Tulip contact) - (3150A)

40kA 3150A G class

714

620

360

336

210210

325

290

502747

676

1034

8.5

806.

6

��Side��Front

��Top

(Unit: mm)

H1-21

12kV dimension (Cradle)

LCL-12G-25D/T, 32D/T G class (Enclosed, Tulip contact) - (630/1250/2000A)

��Side��Front

��Top<Terminal conductor>

(Unit: mm)

Rating25kA

1250A 2000A

A 12 25

B ∅48

H1-22

Vacuum Circuit Breaker

12kV dimension (Cradle)

LCL-12G-40D G class (Enclosed, Tulip contact) - (1250/2000A)

RU

N

731.5

94663

029

5

1235

150

150

560

600

100 662

26

8326

60

150150

1250A:12t

2000A:25t

40kA 1250/2000A G class

4-∅14 Mount hole

��Side��Front

��Top<Terminal conductor>

(Unit: mm)

H1-23

LCL-12G-32D/LCL-12G-40D G class (Enclosed, Tulip contact) - (3150A)

40kA 3150A G class

1014

230 230

120

3514

5

70

12 12

764

439

360

1100

210

724100

210

760

800

4-∅14 Mount hole

��Side��Front

��Top<Terminal conductor>

(Unit: mm)

Vacuum Circuit Breaker

17.5kV dimension (Cradle)

H1-24 H1-24

(Unit: mm)

LVB-17G-40D G class (Visible, Tulip contact) - (1250/2000A)

��Front ��Side

��Front ��Side ��Top

��Top

LVB-17G-40D G class (Visible, Tulip contact) - (3150A)

H1-25

LCL-17G-40D G class (Visible, Tulip contact) - (1250/2000A)

��Side

��Top<Terminal conductor>

(Unit: mm)

H1-26

Vacuum Circuit Breaker

17kV dimension (VCB)

(Unit: mm)

LCL-17G-40D G class (Visible, Tulip contact) - (3150A)

��Side

��Top

<Terminal conductor>

H1-27

24kV dimension (VCB)

LVB-20P-13D, 16D, 25D (Visible, Fixed) - (630/1250/2000A)

LVB-20E, F-13D/(T), 16D/(T), 25D/(T) E, F class - (630/1250/2000A)

��Front ��Side

<Visible, Clip contact> <Enclosed, Tulip contact>

<Terminal conductor>

��Front ��Side

Note ) In case of 12.5kA & 16kA 630A, the dimension shown in parenthesis should be applied.

(Unit: mm)

H1-28

Vacuum Circuit Breaker

24kV dimension (VCB)

LVB-20G-13D, 16D, 25D G class (Visible, Tulip contact) - (630/1250A)

��Front ��Side

LVB-20G-13D/T, 16D/T, 25D/T G class (Enclosed, Tulip contact) - (630/1250/2000A)

��Front ��Side

Note 1) ( ): The dimension shown in parenthesis should be applied to LVB-20G-13E/T or LVB-20G-16E/T, LVB-20G-25E/T for 630A and 1250A in case that distance between phase & phase is 210mm.

2) IP Cover applied both sides in case of 265mm phase distance.

(Unit: mm)

H1-28

H1-29

24kV dimension (Cradle)

Note) Insulation barrirer is not used for rating 12.5kA 630A and 16kA 630A

LCL-20E-13D, 16D, 25D E class (Visible, Clip contact) - (630/1250/2000A)

��Front ��Side

��Top<Terminal conductor>

Rating A B T

630, 1250A 768 190.5 10

2000A 778 185.5 20

(Unit: mm)

H1-30

Vacuum Circuit Breaker

24kV dimension (Cradle)

(Unit: mm)

LCL-20E-13D/T, 16D/T, 25D/T E class (Enclosed, Tulip contact) - (630/1250/2000A)

145

97.5

972

280

15

115

660

40 40

25

20 67 47 45

42

40.5

2-∅14

20

4-∅14

20

4-∅14

20

947.5

1167

1120

265 265

110 400

265

400

820

ST: 260

265

404.

5

10(6

30/1

250A

)

20(2

000A

)34

0

1033

245

40

210

210.

590

202

100

300

∅6.5

40

40

40

40

1250A

40

9080

2000A

8010

0

300

730

960

630A

7-∅14

<Terminal conductor>

��Front ��Side

��Top

Rating A B T

630, 1250A 768 190.5 10

2000A 778 185.5 20

Note) Insulation barrirer is not used for rating 12.5kA 630A and 16kA 630A

H1-31

<Terminal conductor>

LCL-20F-13D, 16D, 25D F class (Visible, Clip contact) - (630/1250/2000A)

��Top

��Front

(Unit: mm)

��Side

Rating A B T

630, 1250A 768 190.5 10

2000A 778 185.5 20

Note) Insulation barrirer is not used for rating 12.5kA 630A and 16kA 630A

H1-32

Vacuum Circuit Breaker

24kV dimension (Cradle)

(Unit: mm)

LCL-20F-13D/T, 16D/T, 25D/T F class(Enclosed, Tulip contact) - (630/1250/2000A)

��Front ��Side

Rating A B T

630, 1250A 768 190.5 10

2000A 778 185.5 20

��Top

<Terminal conductor>

Note) Insulation barrirer is not used for rating 12.5kA 630A and 16kA 630A

H1-33

<Terminal conductor>

LCL-20G-13D, 16D, 25D G class (Visible, Tulip contact) - (630/1250A)

��Front ��Side

��Top

(Unit: mm)

H1-34

Vacuum Circuit Breaker

24kV dimension (Cradle)

210mm

LCL-20G-13D/T, 16D/T, 25D/T G class (Enclosed, Tulip contact) - (630/1250/2000A)

��Front ��Side

��Top<Terminal conductor>

��Earthing Switch

Note) ( ): The dimension shown in parenthesis should be applied to LVB-20G-13E/T or LVB-20G-16E/T, LVB-20G-25E/T for 630A and 1250A in case that distance between phase & phase is 210mm.

(Unit: mm)

H1-35

Accessories

Note) In case that position of VCBchanged to “Run” or “Test” position,“a” contact will be closed.

Accessories for VCB

<Push bar>

Key lock When it is locked by a key, the closing operation is not available(electrically and mechanically) without a Key.

Button padlock Button padlock protects 'ON' or 'OFF' button when accident is occurredby operation at discretion.It is available to operate after release button padlock.

Button coverButton cover protects 'ON' of 'OFF' button when accident isoccurred by operation at discretion. It is available to operate by pushbar.

<G class>

Position switch (Cell switch)Indicating the position (Run or Test) of a VCB, by mechanicallypressing the switch when a VCB change the position. - RUN: 2a- TEST: 2a

H1-36

Vacuum Circuit Breaker

Accessories

Accessories for VCB

Secondary coil (Preparatory trip coil)The main coil and the preparatory coil is connected in parallel. Soeven though there happens a fault in the trip coil, the VCB can betripped by one of the two trip coils.

Latch checking switchWhen the Latch is in abnormal position, the Latch checking switchprevents the closing operation even though there is the 'Closing'signal.

Charge indicatorRemotely indicates the charging is completed. (Standard Feature) - Terminal No.: 9, 10

Position padlockThe hole to prevent the draw-in and out of a VCB from the presentposition.('Run' or 'Test') Standard option in the interlock lever of the E, F class draw-out typeVCB. (Hole size = ∅ 8)

H1-37

<Earthing Switch Position Switch>

<Earthing Switch Locking Coil>

Accessories for Cradle

Earthing switch (for G class draw-out type only)For the safety during the maintenance of a VCB panel, discharge thecharging current in the load side of a VCB with this earthing switch.

Padlock of earthing switch (for G class draw-out type only)The hole to prevent the accident through carelessness earthingswitch operation, the locking of the earthing switch is available whenthe switch is in 'OFF' position. (Hole size = ∅8)

Position switch of the earthing switch (for G class draw-out type only)Indicates the 'ON' or 'OFF' status of the earthing switch. (5a5b)

Locking coil of earthing switch (for G class draw-out type only)To prevent the accident through carelessness earthing switchoperation, the earthing switch can be changed to 'ON' position afterreleasing the lock by magnetizing the coils.

H1-38

Vacuum Circuit Breaker

Accessories

Accessories for Cradle

Shutter padlock The hole to lock the shutters (load and line side) in close position, toincrease the safety during the maintenance of a VCB draw-outposition.(Hole size = ∅8)

Mechanically operated cell switch (MOC)-for G class draw-out type onlyThe auxiliary switch (3a4b), which Indicate the 'ON' or 'OFF' conditionof a VCB, but operated only when the VCB is in 'Run' state. (Installedin the bottom of a cradle)

Truck operated cell switch (TOC) -for G class draw-out type onlyThe auxiliary switch (3a4b), which indicate the 'Run' state of a VCBand is operated by the movement of a VCB frame. (Installed in thebottom of a cradle)

Code plate (Miss insertion prevention) -for E, F class draw-out type onlyTo prevent the insert a VCB to a cradle, when the ratings of VCB andcradle are different.

PadlockTo prevent the insert draw-in/out handle to a screw hole by operatingG class VCB temporarily

Note) #11, 21 are Early “b” contact

Note) #11, 21 are Early “b” contact

H1-39

��Dimension

��Connection diagram

Standard tool

When the control power is off, theCTD supply the power for trippinga VCB.

Capacitor trip device (CTD)

When the DC power is not available, rectify the AC power andget the DC power for closing coil.

Rectifier

Optional accessories

Manual charging handleHandle for charging the spring manually.(Standard feature)

Handle for draw-in and outHandle for draw-in and out the VCB(Standard feature in the draw-out type)

E, F class G class

Ratings Specification

Type CB-T1 CB-T2

Rated input voltage AC100/110V AC200/220V

Freguency (Hz) 50/60 50/60

Charging volt(V) 140/155 280/310

Charging time Within 10 Sec. after the AC power off

Tripping time Within 30 Sec. after the AC power off

Allowable Input85% ~ 100% 85% ~ 110%voltage range

Capacitor rating(μF) 1000 560

Type AC Input voltage Output current Rating time

VCB-X 1∅ 100/110V

40A DC 10 sec.1∅ 200/220V

+

- ~ ~

150

80 40

29.5

70

100

25

��Dimension

��Connection diagram ��CDT

H1-40

Cradle

12kV

LS VCB

Rated voltage

12 12kV

Installation method

G G class draw-out type

MG class draw-out type

+ Bushing

Revision No.

D Pro-MEC

Rated current

12 1250A

20 2000A

30 3150A

Breaking current

32 31.5kA

40 40kA

Breaking current

32 31.5kA

40 40kA

Auxiliary switch

2B 4a4b(A type connector)

2E 10a10b(A type connector)

2G 4a4b(B type connector)

2H 10a10b(B type connector)

LS Cradle Installation method

GG class

draw-out type

Rated current

12 1250A

20 2000A

30 3000A

Revision No.

D Pro-MEC

Rated voltage

12 12kV

Control voltage

1A DC110V

1B DC220V

1C DC48V

1E DC125V

Accessories

B Position Switch (RUN/TEST:2a2a)

C1 Button Padlock (ON)

C2 Button Padlock (OFF)

C3 Button Padlock (ON/OFF)

D1 Button Cover (ON)

D2 Button Cover (OFF)

D3 Button Cover (ON/OFF)

E Button padlock (ON)+ Button cover (OFF)

F Button padlock (OFF)+ Button cover (ON)

G Key Lock

H Secondary Trip Coil(Preparatory trip coil)

J Fire-endurable wiring cable ass’y

K Opening Latch Checking Switch

S Pad Lock (G class)

T Enclosed type, Tulip contact

Accessories

T Enclosed type, Tulip contact

12 G 32 D 12 1A 2B B, C1, D1LVB

12 G 32 D 12 A, B, CLCL

Vacuum Circuit Breaker

Types and ordering information

H1-41

Cradle

17.5kV

LS Cradle

Rated voltage

17 17.5kV

Installation method

P Fixed type

E E class draw-out type

F F class draw-out type

G G class draw-out type

Revision No.

D Pro-MEC

Control voltage

1A DC110V

1B DC220V

1C DC48V

1E DC125V

Breaking current

40 40kA

Auxiliary switch

2B 4a4b(A type connector)

2E 10a10b(A type connector)

2G 4a4b(B type connector)

2H 10a10b(B type connector)

LS VCB

Rated voltage

17 17.5kV

Note) ‘A’ is for ‘G’ class only

Accessories

A MOC (3a4b) + TOC (3a4b)

B Position Switch (RUN/TEST:2a2a)

C1 Button Padlock (ON)

C2 Button Padlock (OFF)

C3 Button Padlock (ON/OFF)

D1 Button Cover (ON)

D2 Button Cover (OFF)

D3 Button Cover (ON/OFF)

E Button padlock (ON) + Button cover (OFF)

F Button padlock (OFF) + Button cover (ON)

G Key Lock

H Secondary Trip Coil(Preparatory trip coil)

K Opening Latch Checking Switch

S Pad Lock (G class)

J Fire-endurable wiring cable ass’y

Accessories

Rated current

12 1250A

20 2000A

30 3150A

Installation method

E E class draw-out type

F F class draw-out type

G G class draw-out type

Breaking current Revision No.

D Pro-MEC

Rated current

12 1250A

20 2000A

30 3150A

17 G 40 D 12 1A 2B B, C1, D1LVB

17 G 40 D 12 A, B, CLCL

H1-42

Vacuum Circuit Breaker

Types and ordering information

B Position Switch (RUN/TEST:2a2a)

C1 Button Padlock (ON)

C2 Button Padlock (OFF)

C3 Button Padlock (ON/OFF)

D1 Button Cover (ON)

D2 Button Cover (OFF)

D3 Button Cover (ON/OFF)

EButton padlock (ON)

+ Button cover (OFF)

FButton padlock (OFF)

+ Button cover (ON)

G Key Lock

HSecondary Trip Coil

(Preparatory trip coil)

J Fire-endurable wiring cable ass’y

K Opening Latch Checking Switch

P1 Dummy VCB(AMP Jack)

P2 Dummy VCB(Phoenix Jack)

Q Earthing Truck(Lower terminal earthing)

R Earthing Truck(Upper terminal earthing)

S Pad Lock (G class)

T Enclosed type, Tulip contact

N CTD(Capacitor Trip Device)

O Rectifier

Cradle

24kV

Note) 1. Version E is available only at 24kV G class and its distance between phases is 210mm.2. "00" is used for ordering Earthing Truck and Dummy VCB4. Accessory only for versions D and E

Note) 1. Version E is available only at 24kV G class and its distance between phases is 210mm.2. Versions A, B and C are available only at G class VCB.

Note2)

Note1)

Note1)

Note2)

Note2)

Note2)

LS VCB

Rated voltage

20 24kV

Installation method

P Fixed type

E E class draw-out type

F F class draw-out type

G G class draw-out type

MG class draw-out type+ Bushing

Revision No.

D Pro-MEC

EPro-MEC(Minimized type)

Control voltage

00 -

1A DC110V

1B DC220V

1C DC48V

1E DC125V

1FAC220(M),

DC110(TC)

1HAC220(M),

DC220(TC)

1TAC110(M),

DC110(TC)

Rated current

06 630A

12 1250A

20 2000A

Breaking current

13 12.5kA

16 16kA

25 25kA

Auxiliary switch

00 -

2B 4a4b(A type connector)

2E 10a10b(A type connector)

2G 4a4b(B type connector)

2H 10a10b(B type connector)

Accessories

Option

LS Cradle Installation method

E E class draw-out type

F F class draw-out type

G G class draw-out type

Accessories

A MOS(3a4b)+ TOC(3a4b)

B Earthing Switch

CEarthing Switch Position Switch+

Earthing Switch Locking coil

T Enclosed type, Tulip contact

PSPosition S/W Block

(24kV E/F class only)

Revision No.

A Conventional

D Pro-MEC

EPro-MEC

(Minimized type)

Breaking current

13 12.5kA

16 16kA

25 25kA

Rated current

06 630A

12 1250A

20 2000ARated voltage

20 24kV

20 G 13 D 06 1A 2B B, C, DLVB

20 G 13 D 06 A, B, CLCL

H1-43

Vacuum Interrupter

Features & Ordering information

Revision No

A, B…

ETC.

Null Straight type

P Potting type

C Wave type

E Embedded type

G Gas Insulation type

Modeling system

Features

Accumulation of more than 20 years ofvacuum-related technologies

Simplified arc extinguishing systemSpiral contact structure with Radial magneticfield provides effective dispersing of the acrenergy.

Simple structure and high qualitySealing after complete removal of gas in thevacuum chamber in order to secure a longvacuum confidentiality

Small size and light weightThe new contact material used to enhancethe competitiveness of the size

Wide rated coveragesWide interrupting range from 6kV up to40.5kV 40kA

High reliability and electrical lifeCertification by KERI and KEMA accordingto the latest standard IEC62271-100 (2008)E2, LIST3, M2

-A

Basic type

L LS

V Vacuum

7 Series No.

PLV7

H1-44

Vacuum Interrupter

VI internal structure

Largely movable and fixed electrodes and main shield compose the Susol VI.The main components are shown in the following.

The vacuum rate within the VI is very high(approximately 5x10-5 Torr) and the spacing betweenfixed contact and movable contact is about 6 ~ 20mm, depending on the voltage.The contacts are in a structure that arc can easily be extinguished and the surfaces of the contactsare made of special alloy (copper - chromium) and the interior is completely sealed to prevent lossof vacuum.Therefore the wearing of the contacts can be minimized in the event of short-circuit and the arcenergy by overvoltage or switching can be reduced effectively.

Fixed electrode

Fixed seal cup

Ceramic

Fixed shield

Contacts

Bellows shield

Bellows

Movable seal cup

Arc shield

H1-45

Basic functions and interrupting action

Interrupting action by VI

Spiral contact structure (Radial magnetic field ),using the force (F = j×B) generated by theinteraction of the radial magnetic field caused bythe current flowing through the arc between twocontacts, disperse the arc energy evenly on thesurface of contact by rotating the arc that iscontracted by the pinch effect so as to minimizecontact damage.The images show arc behavior during the arcingtime of about 8ms by shooting with high-speedcamera capable of shooting 10,000 frames persec.(0.1ms/frame) by focusing on parts of the arcingtime on the above graph and simultaneouslymeasured arc voltage also represented to show arcstate by section

In case of using the flatcontact any of the designsdo not reflect on whencontacts are opening the arcwith high temperature iscontracted and fixed in thecenter of the contacts,Which is called pinch effect.To prevent the effect twokinds of contact shapes aredesigned.One is Axial magnetic fieldwhich spreads the arcbefore its contraction, andthe other is Radial magneticfield whichpermits the contraction ofthe arc but makes it rotatedto disperse the energy.Because contracted arc isshaped like a cylinder it iscalled Contracted arc orcolumnar arc.

Arc voltage waveforms and arc image captured during arcing time

Arc driving principle in the contacts of Radial magnetic field

Current

Direction of rotating arc

Columnar arc

Radial magnetic field type contact

H1-46

Vacuum Interrupter

VI endurance by interrupting current

VI model LV2 at 7.2kV�N : Operation numbers�I : Interrupting current

Num

ber[o

ps.]

Interrupting current [kA]

VI model LV3 at 7.2kV�N : Operation numbers�I : Interrupting current

Num

ber[o

ps.]

Interrupting current [kA]

VI model LV4 at 24kV�N : Operation numbers�I : Interrupting current

Num

ber[o

ps.]

Interrupting current [kA]

VI model LV5 at 17.5kV�N : Operation numbers�I : Interrupting current

Num

ber[o

ps.]

Interrupting current [kA]

H1-47

Note) 1. Above graphs represent the characteristics of the electrical life of LS Susol VCB.2. Life characteristics of each model in each rating represents the LOG-LOG graphs.

VI model LV8 at 17.5kV�N : Operation numbers�I : Interrupting current

Num

ber[o

ps.]

Interrupting current [kA]

VI model LV7-P1 at 24kV�N : Operation numbers�I : Interrupting current

Num

ber[o

ps.]

Interrupting current [kA]

VI model LV8 at 36kV�N : Operation numbers�I : Interrupting current

Num

ber[o

ps.]

Interrupting current [kA]

H1-48

Vacuum Interrupter

Dimensions

17-0

.30

21-0

.30 17-0

.30

LV2 LV3 LV420

0+0.5

5.2

0+0.1

0+0.1

300+0.5

LV5-P LV5A6

0+0.1

300+0

.3

-0.10

0+0.1

LV8

H1-49

60+0

.1

-0.10

0+0.1

300+0

.3

300+0.5

-0.10

4×9

0O

LV7-P1 / LV8-P LV7-C LV10404

H1-50

Technical data

Vacuum Interrupter

Rated voltage (kV)

Rated power frequency withstand voltage (kV, rms)

Rated impulse withstand voltage (kV, crest)

Rated frequency (Hz)

Rated normal current (Amp)

Rated short circuit current (Sym.) (kA)

Rated short circuit making current (kA, peak)

Rated duration of short-circuit (sec)

Interrupter weight (kg)

Moving part weight (kg)

Outline dimension (mm) a

b

c

Contact stroke (mm)

Opening speed, average 0 to 75% of full stroke (m/s)

Overtravel during opening, Max. (mm)

Closing speed, average last 33% of full stroke (m/s)

Contact bounce duration, Max. (sec)

Added force from atmospheric pressure (kg∙f)

Contact force from atmospheric pressure (kg∙f)

Contact erosion limit (mm)

Mechanical life (×104, Operations)

7.2 7.2 24/25.8 12/17.5

20 20 50 42

60 60 135 95

50/60 50/60 50/60 50/60

400/630 630/1250 630 630/1250

3 3 3 3

0.8 1.4 1.2 2.4

0.3 0.7 0.5 0.7

132 158 208 220

91 105 159 163

62 80 62 90

6±1 10±1 12±1 10±1

0 7~1.0 0 7~1.0 1.3~1.5 0.7~1.0

2 2 2 2

0 7~1.0 0 7~1.0 0 7~1.0 0.7~1.0

2 2 2 2

8.5 12.6 9 12.6

3 3 3 3

M2 M2 M2 M2

Outer view

Type LV2 LV3 LV4-E LV5-P

Elec

trica

l rat

ings

Mec

hani

cal d

ata

Mec

hani

cal r

equi

rem

ents

8 12.5 20 25 16 20 25

20.8 32.5 52 65 41.6 52 65

80 154 227 120 154 227

H1-51

12/17.5 24/25.8

42 65

95 125

50/60 50/60

2000

3 4

3.0 7.3

1.0 2.2

220 272

160 216

80 145

10±1 12±1

0.7~1.0 1.0~1.3

2 2

0.7~1.0 0.7~1.0

2 2

12.6 25.5

3 3

M2 M2

7.2/12 25.8

20/28 70

60/75 150

50/60

4000 3150

4 3

8.7

2.0

317

210

135

10±1 17±1

1.0~1.3

1.5

0.7~1.0

2

25.8

3

M2

40.5 17.5 36

95 38 70

185 95 170

50/60 50/60 50/60

~3150 ~3150 ~3150

4 4 4

9.8 6.6 7.3

2.6 2.2 2.2

390 272 272

329 210 216

145 135 145

17~19 12±1 17~19

1.3~1.5 1.0~1.3 1.3~1.5

2 2 2

0.7~1.0 0.7~1.0 0.7~1.0

2 2 2

25.1 25.8 25

3 3 3

M2 M2 M2

LV5A LV7-P1 LV7-C LV8 LV8-P LV10404

2500 ~3150

20 25 25 31.5 40 25 31.5 40 50 25 31.5 40 40 50 40

52 65 65 81.9 104 65 81.9 104 130 65 81.9 104 104 130 104

154 227 227 306 367 227 306 367 460 227 306 367 367 406 367

Contents

Features and Structure H2-2

Control circuit diagram H2-4

Dimensions H2-5

Vacuum Circuit Breaker for MCSG

Pro-MEC MCSG VCB

H2

H2-2

Vacuum Circuit Breaker for MCSG

Features and Structure

Features��Module type VCB

��Convenient especially for fabricating MCSG- Housing is designed like VCB compartment style- MCSG panel can be easily constructed if combined with Low voltage compartment, Busbar

compartment and Cable compartment.

��Convenient for maintenance and offering high safely- Earthing switch can be operated from outside of the panel, and which makes earthing of 3 phases at the

same time.- Without opening the compartment panel door, breaker can be drawn in or out electrically or manually

��Main functions- Breaker : draw- in or out electrically or manually- Compartment : 3-positions

��Standard- IEC 62271-100

①① Name plate

②② Manual closing button

③③ Keylock

④④ Manual trip button

⑤⑤ Manual charging hole

⑥⑥ Contact position

indicator

⑦⑦ Closing spring

charge indicator

⑧⑧ Operation counter

⑨⑨ Insertion &

Draw-out screw

⑩⑩ Geared Mechanism

⑦⑦

②②

③③

④④

⑧⑧

⑨⑨

⑩⑩

⑤⑤

⑥⑥

①①

Compartment Earthing switch Bushings Shutter

Electricaldrive unit

H2-33

Ratings

Rated voltage (kV) 25.8Rated normal current (A) 630 2000Rated frequency (Hz) 60Rated short-circuit breaking current (kA) 25Rated short-circuit breaking capacity (MVA) 1100Rated short-time withstand current (kA) 25/3sRated short-circuit making current (kA) 65Rated breaking time (Cycles) 3Withstand Power frequency (kV) 50/1minvoltage Impulse (kV/1.2××50㎲㎲ ) 125TRV rising rate (kV/㎲㎲ ) 0.47TRV max. (kV) 41Rated operating sequence O-0.3s-CO-3min-COMechanical lifetime 10,000operationsElectrical lifetime 10,000operationsRated control voltage (V) DC 110VRated trip voltage( V) DC 110VStandard auxiliary switch 4a4b, 8a8bRated opening time (s) ≤ 0.04No-load closing time (s) ≤ 0.06Rated charging motor current (A) ≤ 7Rated closing coil current (A) ≤ 5Rated trip coil current (A) ≤ 5Closing spring charging time (s) ≤ 12Draw-in/out motor voltage (V) DC 110VDraw-in/out motor current (A) ≤ 5Distance between phases (mm) 265

Weight (kg)breaker 205 236.5 compartment 281 293

Installing GApplied standard IEC 62271-100

LVB‐‐25□□-25□□/06 LVB‐‐25□□-25□□/20Type

Rated voltage

25 25.8kV

Installation method

G Gclass draw-out

Auxiliary switch

2G 4a4b(B type connector)

2H 8a8b(B type connector)

��Breaker

25 G 25 I 06 1A 2B B,C,DLVB

��CCrraaddllee((CCoommppaarrttmmeenntt))

LS VCB

Breaking current

25 25kA

Version

Rated current

06 630A

20 2000A

Accessories

B Position Switch

C1 Button Padlock(ON)

C2 Button Padlock(OFF)

C3 Button Padlock(ON/OFF)

D1 Button Cover(ON)

D2 Button Cover(OFF)

D3 Button Cover(ON/OFF)

E Button Padlock(ON)+Button Cover(OFF)

F Button Padlock(OFF)+Button Cover(ON)

G Key Lock

H Secondary Trip Coil

Rated voltage

25 25.8kV

LS VCB

25 C 13 D 06 A,B,CLCL

Version Rated current

06 630A

20 2000A

Breaking current

25 25kA

Installation method

C Bushing

Accessories

B Earthing Switch

E Door

Control voltage

1A DC110V

1B DC220V

1C DC48V

1E DC125V

1F AC220(M), DC110(TC)

1H AC220(M), DC220(TC)

1T AC110(M), DC110(TC)

H2-4

Vacuum Circuit Breaker for MCSG

Control circuit diagramMOTOR POWER SOURCE

A1

A2

P NN

N

M

C

A3

A4CS

TRIP POWER SOURCE

CLOSING POWER SOURCE

A5

A6CS

CW

(인입)

CC

W(인출)

PP

PA

uxili

ary

switc

h

Pos

ition

S/W

Indi

catio

n fo

r cl

osin

g sp

ring

"ch

arge

d" is

ava

ilabl

e.

913

14 43

89X

44

1LS

62

3452

b35

3389

Y34

3389

X34

652

a

6'

43

89Y

89X

89Y

44

2189

Y22

1516

1722

2426

2840

4244

46

2325

2729

4143

4547

2325

2729

4143

4547

3638

5052

5456

5870

13

1

PS1

PS2

3

24

24

3638

5052

5456

5870

3739

5153

5557

5971

3739

5153

5557

5971

2224

2628

4042

4446

13 14

13 14

10

1D C B A

D C B A

23

41

23

4

5051

5253

5

1314

1516

17

67

89

109

1011

1213

1415

16

3637

3839

12

34

56

A1A2

A3A4

A5A6

78

910

1112

1314

2223 ( 4a

4b

)

( 8a

8b

)S

EC

ON

DA

RY

DIS

CO

NN

EC

T W

IRIN

G(

TO

P V

IEW

)

2425

2627

2829

1516

1D C B A

D C B A

23

41

23

4

5051

5253

5

1314

1516

17

67

89

109

1011

12

5455

5657

5859

70

4243

4445

4647

71

1314

1516

3637

3839

4041

12

34

56

A1A2

A3A4

A5A6

78

910

1112

1314

2223

2425

2627

2829

1516

4 5

Yb

Ya

52b

LS1

63 4

7 8

3

43

64

21

21 1 5 1 230 31

LS2

LS3

TC1 2

89X

8 9

1LS

52 21

89X

22 89Y

8 9

89M

4a4b

8a8b

1 2

Y

Run

Test

∅: E

xter

nal t

erm

inal

of V

CB

52: V

acuu

m c

ircui

t bre

aker

M: S

prin

g ch

argi

ng m

otor

TC: T

rip c

oil

TC1

: Sec

onda

ry tr

ip c

oil

C: C

losi

ng c

oil

Y: A

nti-p

ump

rela

y52

a: A

uxilia

ry s

witc

h (N

O)

52b

: Aux

iliary

sw

itch

(NC

)LS

1: C

losi

ng in

terlo

ck li

mit

switc

h(on

ly w

ithdr

awab

le ty

pe)

LS2

: Mot

or s

topp

ing,

clo

sing

spr

ing

char

ged

indi

catio

nLS

3: A

nti-c

losi

ng, A

nti-p

umpi

ng li

mit

switc

hLS

5: "

Off"

at T

est P

ositi

onLS

6: "

Off"

at R

un P

ositi

onP

S1

: Pos

ition

S/W

("O

n" a

t Tes

t Pos

ition

)P

S2

: Pos

ition

S/W

("O

n" a

t Run

Pos

ition

)89

X :

Aux

iliary

Rel

ay fo

r Ins

ertin

g89

Y :

Aux

iliary

Rel

ay fo

r with

draw

ing

89M

: M

otor

for w

ithdr

awin

g an

d In

serti

ng

Not

e. D

iagr

am s

how

s th

e ci

rcui

t bre

aker

in p

ositio

n“O

FF”w

ith c

losi

ng s

prin

g“C

harg

ed”

H2-5

Dimensions10

82

1365

7010

375

A

A

35

53 538941000

15.4

265 265

(183

.4)

(212

.4)

963553 1

95

652.

4

183.

4

1365

340

372.

6

26.8

st:310

10

263.8180Lead wire(2m)

293.8

410

B B

C

1

TEST RUN

Earthing

45

3086

3060

60

8634

0

45 95

9681000

425

425

190

265 265175

425

2-∅13

(Earthing)∅6.5

3-∅10

5012

8

844

700

265

205

600

50

20

41065

513 16.8370 40

340 40 483963

50

950 17

510

3

15 933 (15)

700

3-∅11(Mounting Hole)

3-∅11×22(Mounting Hole)

<Front> <Rear> <Front> <Rear>

20-M8 POP NUT(DP:18)

<B-B Section View>

<C-View(Cover 2 Cutting)>

<A-A Section View>

User Bus

Cradle(Compartment) - w/o Earthing Switch

630A

2000A

265 265

860 350 50

445

445

481785

886912

1013

340

340

608

G type breaker + track(electric draw-in/out)

��Rear��Front

��Top

H2-6

Vacuum Circuit Breaker for MCSG

Dimensions

<B-B Section View>

2525

600

1717

8383

340

2626

20

340 40 483 50 70

700

950

50

100 100763

140 150

1565 ∅19

9-∅11Mounting Hole

50

370 40 16.8513

20-M8 POP NUT(DP:18)

2-∅1360

60

26

26

<Front> <Rear> <Front> <Rear>

A

(Door)**Option

1750

125

500

500

767.

424

434

039

8.6

4541

5

190

454

415

415

415

45

500

125

A

Test B

1000 39 963 320.935

16-∅10(Mounting Hole Side) 10-M8 POP NUT

(DP:18)

25t(2000A)10t(630/1250A)

st:310

M12 TAP(DP:24)

3-∅10

(Earthing)∅6.5

35

74

36

User Bus

968

265 265

265 265

175

(Earthing S/W)**Option

35

Test Run

Test

238.8

Cradle(Compartment) - w/ Earthing Switch

��Side ��Rear��Front

��Top <Terminal conductor>

Contents

Ratings H3-4

Ratings of Accessories H3-5

Accessories H3-6

Control circuit diagram H3-8

Dimensions H3-9

Types and ordering information H3-14

Vacuum Circuit Breaker for Power Plants

Power Plants VCB

H3

A product developed for water and thermal power plants due

to the revision and application of Kepco’s standard (ES150)

followed by the IEC standard revision. It has completed the

high capacity (40~50kA) VCB series for power plants by

securing higher breaking capacity, safety and reliability.

VCB Full OptionTo prevent fatal error, property and life loss caused from operator duringoperation, it is equipped with safety mechanisms such as shutter padlock.

Bushing applied for Window CT adaptationThe bushing provides sufficient strength to collaborate with the internal insulation and isadaptable with CT offering safety mechanically and electrically when applying large current.

H3-2

Power PlantsVacuum Circuit BreakerVacuum Circuit Breaker

Vacuum Circuit Breakersfor Power Plants

It is recognized for reliability by acquiring newIEC 62271-100 and ES150 (KEPCO standardspecification on AC breakers)

H3-3

Vacuum Circuit Breaker for Power Plants

Ratings

H3-4

Type LVB-06G-40H LVB-06G-40J LVB-06G-50J

Rated voltage (kV) 7.2

Rated normal current (A) 1200 2000 3000 1250 2000 2500 3150 1250 2000 3150

Rated frequency (Hz) 60

Rated short-circuit breaking current (kA) 40 50

Rated short-circuit breaking capacity (MVA) 500 624

Rated short-time withstand current (kA/3sec) 40 50

Rated short-circuit making current (kAp) 104 130

Rated breaking time (Cycle) 3

Rated opening time (sec) ≤ 0.04

No-load closing time (sec) ≤ 0.06

Withstand Power frequency (kV/min) 20

voltage Impulse (kV/1.2××50㎲㎲ ) 60

Rated operating sequence CO-15s-CO O-0.3s-CO-3min-CO

Rated charging motor current (A) 5 (at DC125V) 5 (at DC110V)

Rated closing coil current (A) 3 (at DC125V) 3 (at DC110V)

Rated shunt coil current (A) 3 (at DC125V) 3 (at DC110V)

Type Mechanical M2

test Electrical E2 (Maintenance free) E2 (List1)

Capacitive current switching C2

Lifetime Mechanical Without maintenance 10000 operations

Maintenance 20000 operations

Electrical Without maintenance 10000 operations

Maintenance 20000 operations

Auxiliary switch 3a3b

Installing Draw-out G-type Visible, Tulip

Weight Breaker G-type (kg) 200 260 200 260 200 260

Cradle G-type (kg) 190 230 190 230 190 230

Applied standard ES150 NOTE) IEC 62271-100

Type test laboratory KERI

Note) ES150: KEPCO's standard in which IEC62271-100 is appliedKERI: Korea Electrotechnology Research Institute

H3-5

Ratings and auxiliary devices

Note) * applied in the VCB of which MOC is operable at the TEST position.

Switch Mechanism MOC TOC

Breaker a b a b a b

CLOSE ON OFF ON OFF ON OFFRUN

OPEN OFF ON OFF ON OFF ON

CLOSE ON OFF ON * OFF * ON OFFTEST

OPEN OFF ON OFF * ON * OFF ON

Position of the Auxiliary switch

Motor

Closing Coil (C)When the rated volt is applied to the coil the breaker is closed.The electrical anti-pumping circuit is built-in it.

Note) Range of the normal operating voltage: 75~125% of rated voltage

Shunt coil (TC)When the rated volt is applied to the coil the breaker is opened.

Note) Range of the normal operating voltage: 60~125% of rated voltage

Auxiliary switchStandard configuration : 3a3b1b of early-b contact function exists inside

Charge indicator ofthe closing springIndicating the condition of the closing spring.

Position indicator of the main contactsIndicating the 'Close' or the 'Open' of the main contacts.Close position: ��ON�� Open position: ��OFF��

CounterMechanically counts the operation of the VCB by 5digits

Charged Discharged

Close position Open position

When the closing spring is charged, the control power of motor is turned off by the built-in limit s/w.

Note) Range of the normal operating voltage: 85~110% of rated voltage

Note) The contact ratings of Mechanical Operated Cell Switch(MOC)are the same with that of the Aux. switch.

The peak value of the Consumption Charging timeRated voltage

inrush current (A)Rated current (A)

power (W) (Sec.)

DC 110V 20 3 330 12

DC 125V 20 3 330 12

ClassificationResistive Inductive Contact load (A) load (A) configuration

Contact Ratings DC110V 10 5

3a3b125V 10 5

Rated voltage Rated current (A)

DC 110V 3

DC 125V 3

Rated voltage Rated current (A)

DC 110V 3

DC 125V 3

ClassificationResistive Inductive Contact load (A) load (A) configuration

Contact Ratings DC110V 10 5

3a3b125V 10 5

Truck Operated Cell Switch(TOC)

Vacuum Circuit Breaker for Power Plants

Accessories

H3-6

Accessories for breakers

��Position padlockIt is located at the screw hole to prevent the draw-in and out of a breakerfrom the present position(Disconnected, Test or Connected)

��Mechanical position indicatorIt is located in the lower part of a breaker to check the present position -Disconnected, Test or Connected- easily.

��Position interlockThe breaker is locked in each position-Disconnected, Test or Connected,thus it is necessory to release the lock before draw-in or out of a breakerfrom the present position.

��Auto connectionWhen the breaker is moved to Test position from Disconnected positionthe connector for control powers is automatically connected. In case ofreverse moving of the breaker the connector is automaticallydisconnected.

��Code plateWhen the breaker is inserted to the cradle, if the ratings does not matchwith the cradle, it mechanically prevents the breaker from being insertedinto the cradle.

H3-7

��Mechanically operated cell switch (MOC)It is auxiliary switch (6a6b), which indicates the 'ON' or 'OFF' condition of aVCB, and operated when the VCB is in 'Run' state.

��Truck operated cell switch (TOC)It is auxiliary switch (6a6b), which indicates the 'Run' state of a VCB and isoperated by the movement of a VCB frame.

Accessories for breakers

Vacuum Circuit Breaker for Power Plants

Control circuit diagram

H3-8

NA

2A

4N

A6

MOTOR POWER SOURCE

M

A1

P

8

A3CS

TRIP POWER SOURCE

CLOSING POWER SOURCE

TC

52a

A5CS

P

N

3a

2322

2524Aux

iliar

y sw

itch

P

Y

2422

54

2523

5559

58 59

58

2726

272654 55

57

56 57

56

3 4

4 6

1 26 77

C

3130511 2 1 2

Ya

Yb 52b

LS1

LS3 3 4

5 6

Ear

ly b

235756

A2

22A1

2725

59585554

B

A4

A6

2624

A5

A3 A

17

(FR

ON

T V

IEW

OF

RE

CE

PTA

CLE

PLU

G)

2425

SE

CO

ND

AR

Y D

ISC

ON

NE

CT

WIR

ING

53

42

1A1

A3

A2

A4

22A

5

23A

6

1314

1615

1211

89

76

10

22

5455

26271819

2120

5658

5759

2324

(12P

TA

P P

LUG

)

LS2 43

LS4

21

3b

Cel

l sw

itch

in s

ervi

ce p

ositi

on

3130

3534

3736

3938

5150

76

2322

2524

2726

2928

2515

2616

2717

2212

2313

2414

<TO

C>

<MO

C>

5352 4140

2515

2616

2717

2212

2313

2414A B

Not

e) D

iagr

am s

how

s th

e ci

rcui

t bre

aker

in p

ositio

n“O

FF”

with

clo

sing

spr

ing“

Cha

rged

”

∅: External term

inal of VCB

52

: Vacu

um c

ircu

it breaker

M: Spring c

harg

ing m

otor

TC

: Trip c

oil

C: Closing c

oil

Y: Anti-

pump relay

52a

: Auxilia

ry switc

h (NO)

52b

: Auxilia

ry switc

h (NC)

LS1

: Closing interlock

lim

it sw

itch

LS2

: Motor stopping

LS3

: Anti-

closing, Anti-

pumping lim

it sw

itch

LS4

: Motor Charg

ing interlock

lim

it sw

itch

H3-9

Dimensions - Breakers

LVB-06G-40H, 40J G class (Visible, Tulip contact)-(1200, 1250, 2000A) (unit : mm)

336

717

745

685.

2

58453

2

686.2

60

10

368.

236

0

722

254254

130

351.

3

815.

2

696

1200/1250/2000A

54(m

ale c

onducto

r)��Side��Front

��Top

<Conductor>

Vacuum Circuit Breaker for Power Plants

Dimensions - Breakers

H3-10

LVB-06G-40H, 40J G class (Visible, Tulip contact)-(2500, 3000, 3150A) (unit : mm)

60

10

686.2

336

130

349.

8

815.

2

360

368.

2

254254

722

685.

2

58453

2

745

717

696

2500/3000/3150A

Heat sink(only for 3150A)

79(m

ale c

onducto

r)��Side��Front

��Top

<Conductor>

H3-11

LVB-06G-50J G class (Visible, Tulip contact)-(1250, 2000A) (unit : mm)

336

717

745

58453

2

677.2

60

10

368.

236

0

722

254254

130

815.

7

696

Fixed contact

115.5 140

403.

8

341.

3

Moving contact

54(m

ale c

onducto

r )

676.

2

��Side��Front

��Top

Vacuum Circuit Breaker for Power Plants

Dimensions - Breakers

H3-12

LVB-06G-50J G class (Visible, Tulip contact)-(3150A) (unit : mm)

254 254

815.

7

722

115.5 140

267.

813

6.5

336

360

358.

710

150.

2

445.8

541

677.2

58453

2

676.

2Moving contact Fixed contact

79(m

ale c

onducto

r)

696

717

130

341.

8

107

��Side��Front

��Top

H3-13

252

252

374

50 24035

374

235.5

150 500 361

Autocon(3a3b)

M.O.C(6a6b)

1134

436.5

544

338

1038.5T.O.C(6a6b)

644

24035

310

816

776

254

254

360

449.

5

75.815

1.5

5961

(레일

폭)

1035

61

175

103.

5

310

∅79

∅54

∅14

8 ∅14(Earthing)

Mounting 6-∅12

∅14

8

∅21

8∅

218

5036

140 123

140 123

4-M12 DP20

2-M12 DP20

2500/3000/3150A

1200/1250/2000A

Cradles (unit : mm)

Vacuum Circuit Breaker for Power Plants

Types and ordering information

H3-14

Option

MOC(6a6b)+TOC(6a6b)

A1 MOC active only at RUN

position

MOC(6a6b)+TOC(6a6b)

A2 MOC active only at TEST

and RUN position

Note) 1.Rated current 2500A is available only at 7.2kV 40kA, IEC version(J)2.Control voltage and Auxiliary switch are not applied to Dummy VCB and Earthing Truck

LS VCB

Cradle

Breaker

LCL 06 G 40 J 12

LS Cradle

Rated voltage

06 7.2kV

Installation method

G G class draw-out

Breaking current

40 40kV

50 50kV

Rated current

12 1200/1250A

20 2000A

25 2500A

30 3000/3150A

A1, A2

Rated voltage

06 7.2kV

Installation method

G G class draw-out

Breaking current

40 40kA

50 50kA

Standard

H ESB150

J IEC

Control voltage

1A DC110V

1B DC220V

1E DC125V

Auxiliary switch

2L 3a3b(Autocon)

Option

C1 Button padlock(ON)

C2 Button padlock(OFF)

C3 Button padlock(ON/OFF)

D1 Button Cover(ON)

D2 Button Cover(OFF)

D3 Button Cover(ON/OFF)

EButton padlock(ON)+

Button cover(OFF)

FButton padlock(OFF)+

Button cover(ON)

G Key Lock

P3 Dummy VCB

Q Earthing Truck(lower terminal)

R Earthing Truck(upper terminal)

LVB G 40 J 12 1A 2L P3,Q,R06

standard

H ESB150

J IEC

Rated current

12 1200/1250A

20 2000A

25 2500A

30 3000/3150A

NOTE1)

NOTE2)

Contents

H4

Nuclear Power Plants VCB

Ratings H4-4

Ratings of Accessories H4-5

Accessories H4-6

Control circuit diagram H4-8

Dimensions H4-9

Types and ordering information H4-11

Vacuum Circuit Breaker for Nuclear Power Plants

H4-2

It was developed for KEPCO nuclear power stations. This breaker

satisfies quality, safety measures (secure from earthquake and

other environments), and surge protection class complies with

“1E-CLASS” ±provisions. It is featured with high breaking

technologies, safety, and reliability by applying our own vacuum

interrupters (50KA) approved by ANSI standard tests.

Nuclear Power PlantsVacuum Circuit BreakerVacuum Circuit Breaker

VCB Full Option

To prevent fatal error, property andlife loss caused from operatorduring operation, it is equippedwith safety mechanisms such asshutter padlock.

Bushing applied forWindow CT adaptation

The bushing provides sufficientstrength to collaborate with theinternal insulation and is adaptablewith CT offering safety mechanicallyand electrically when applyinglarge current.

Satisfies earthquake andother internal environmentspecifications

During the lifespan of power stations (40yrs),it is designed to operate its fundamentalbreaking functions even under the mostsevere conditions like earthquake, which iscritical from safety perspectives. Thesetechnologies proven through tests thatcomply with KEPIC standard and relevantspecifications are to guarantee nuclearreactor safety.

H4-3

Vacuum Circuit Breakersfor Nuclear Power Plants

Vacuum Circuit Breaker for Nuclear Power Plants

Ratings

H4-4

Type LVB-05G-50B LVB-15G-40B

Rated voltage (kV) 4.76 15

1200 1200

Rated normal current (A) 2000 2000

3000 -

Rated frequency (Hz) 60 60

Rated short-circuit breaking current (kA) 50 40

Rated short-circuit breaking capacity (MVA) 410 1040

Rated short-time withstand current (kA/3sec) 50 40

Rated short-circuit making current (kA) 130 104

Rated breaking time (Cycle) 3 3

Rated opening time (sec) ≤ 0.04 ≤ 0.04

No-load closing time (sec) ≤ 0.06 ≤ 0.06

Withstand Power frequency (kV/1min) 19 36

voltage Impulse (kV/1.2××50㎲㎲ ) 60 95

Rated operating sequence 0-0.3s-CO-3min-CO

Rated charging motor current DC 125V (A) 5 5

Rated closing coil current DC 125V (A) 3 3

Rated shunt coil current DC 125V (A) 3 3

LifetimeMechanical(w/o maintenance) 10000 operations 10000

Electrical(w/o maintenance) 10000 operations 10000

Auxiliary switch 5a3b 5a3b

Installing G-type G-type

Weight1200,2000A (kg) 300 300

3000A (kg) 350 -

Applied standard ANSI C37 ANSI C37

Type test laboratory KERI KERI

H4-5

Ratings of Accessories

Note) The contact ratings of Mechanical Operated Cell Switch(MOC)are the same with that of the Aux. switch.

MotorWhen the closing spring is charged, the control power of motor is turned off by the built-in limit s/w.

The peak value ofRatedcurrent(A)

Rated voltagethe inrush current (A) Range of the normal Consumption Charging time

4.76kV 15kV 4.76kV 15kV operating voltage power (W) (sec)

50kA 40kA 50kA 40kA

DC 125V 15 15 5 5 90~140 360 8

Closing Coil (C)When the rated volt is applied to the coil the breaker is closed.The electrical anti-pumping circuit is built-in it.

The peak value of

Rated voltagethe inrush current (A)

Range of the normal

4.76kV 15kV operating voltage

50kA 40kA

DC 125V 3 3 90 ~ 140

The peak value of

Rated voltagethe inrush current (A)

Range of the normal

4.76kV 15kV operating voltage

50kA 40kA

DC 125V 3 3 70 ~ 140

Auxiliary switchStandard configuration : Reversible 8C(5a3b)and 2c(2b) with early-b contact function

CounterMechanically counts the operation of the VCB by 5digits

Shunt Coil (TC)When the rated volt is applied to the coil the breaker isopened.

Switch Mechanism MOC TOC

Breaker a b a b a b

CLOSE ON OFF ON OFF ON OFFRUN

OPEN OFF ON OFF ON OFF ON

CLOSE ON OFF ON OFF ON OFFTEST

OPEN OFF ON OFF ON OFF ON

Position of the Auxiliary switch

ClassificationResistive Inductive Contactload(A) load(A) configuration

AC250V 10 5

125V 10 5

Contact Ratings 250V 10 5 8c

DC 125V 10 5

30V 10 5

Charge indicator ofthe closing springIndicating the condition of the closing spring.

Position indicator of the main contactsIndicating the 'Close' or the 'Open' of the main contacts.Close position: ��ON�� Open position: ��OFF��

Charged Discharged

Close position Open position

Vacuum Circuit Breaker for Nuclear Power Plants

Accessories

H4-6

��Position padlockIt is located at the screw hole to prevent the draw-in and out of a breakerfrom the present position(Disconnected, Test or Connected)

��Mechanical position indicatorIt is located in the lower part of a breaker to check the present position -Disconnected, Test or Connected- easily.

��Auto connectionWhen the breaker is moved to Test position from Disconnected position theconnector for control powers is automatically connected.In case of reverse moving of the breaker the connector is automaticallydisconnected.

��Reversible contact10 auxiliary switches are provided. 8 of them consist of reversible 8c whichcan be changed from a(b) to b(a). Factory composition is 5a3b. And theother 2 switches are supplied as 2b with early-b contact function

��Code plateWhen the breaker is inserted to the cradle, if the ratings does not matchwith the cradle, it mechanically prevents the breaker from being insertedinto the cradle.

��Auto dischargeIn case the breaker is drawn-out when the closing spring is charged in theposition-Disconnected, Test or Connected, or the breaker is moved toDisconnected position from Test position the closing spring shall beautomatically released.

Accessories for breakers

H4-7

��Mechanically operated cell switch (MOC)This 6a6b switch indicates the 'ON' or 'OFF' condition of a VCB and isoperated in the positions of 'Run' and 'Test"..

��Truck operated cell switch (TOC)This 6a6b switch indicates the 'Run' state of a VCB and is operated by themovement of a VCB frame.

Accessories for cradles

Vacuum Circuit Breaker for Nuclear Power Plants

Control circuit diagram

H4-8

P NN

N

PP

22

22

LS2

MOTOR POWER SOUREC

CLOSING POWER SOURCE

TRIP POWER SOURCE

3 4

1 1 5 30 31

3 4

7

6 6’ 1 2

8

1 22

3 4

4 6

5 6

LS3 LS

1

Ya

Yb

52b

52a

3524

3726

3928

5140

5343

5445

5647

58

2334

2536

2738

2950

41

2325

2729

41

5242

5544

5746

59

5557

59

2426

2840

5456

58

Aux

iliar

y sw

itch

early

b

5a3b

A1 M

CY

TC

A2

A4

A6

A3

A5

CS

CS

SE

CO

ND

AR

Y D

ISC

ON

NE

CT

WIR

ING

(FR

ON

T V

IEW

OF

RE

CE

PTA

CLE

PLU

G)

13 1A2

A1

A3

A5

2224

2628

4054

5658

A4

A6

2325

2729

4155

5759

23

45

67

89

1011

12

1415

1617

1819

2021

2223

24∅: External term

inal of VCB

52

: Vacu

um c

ircu

it breaker

M : S

pring c

harg

ing m

otor

TC : T

rip c

oil

C : C

losing c

oil

Y : A

nti-

pump relay

52a

: A

uxilia

ry switc

h (NO)

52b

: A

uxilia

ry switc

h (NC)

LS1 : Closing interlock

lim

it sw

itch (only w

ithdrawable typ

e)

LS2

: Motor stopping, closing spring c

harg

ed indicatio

n

LS3 : A

nti-

closing, Anti-

pumping lim

it sw

itch

Not

e) D

iagr

am s

how

s th

e ci

rcui

t bre

aker

in p

ositio

n“O

FF”w

ith c

losi

ng s

prin

g“C

harg

ed”

H4-9

Dimensions

1200/2000A

3000A

722

254 254

722

745

109 228 109 228

817

109.5 442.586.5

713

369

360

360

816

Breaker

<Front view>

<Side view>

Vacuum Circuit Breaker for Nuclear Power Plants

Dimensions

H4-10

936

254 254

644

850

343 137

100

1070

360

449

157

195 630

1020

252

213

50

310

203

36

4-M12 DP18

2-M12 DP24

2-M12 DP24

1200/2000A

3000A

Cradle

<Front view>

<Side view>

H4-11

Types and ordering information

Breaker

LVB 05 G 40 B 20 1A 2K

LS VCB

Rated voltage

05 4.76kV

15 15kV

Installation method

G G class draw-out

Version

B Pro-MEC

Control voltage

1A DC110V

1B DC220V

1C DC48V

1E DC125V

1

Nuclear class

1 1E class

2 Non 1E class

Nuclear class

1 1E class

2 Non 1E class

Breaking current

40 40kA

50 50kA

Rated current

12 1200A

20 2000A

30 3000A

Auxiliary switch

2K 8c 접점

Cradle

LCL 05 G 40 B 20 1

LS Cradle Installation method

G G class draw-out

Rated current

12 1200A

20 2000A

30 3000A

Rated voltage

05 4.76kV

15 15kV

Breaking current

40 40kA

50 50kA

Version

B Pro-MEC

Note) 1A,1B,1C are only availableat 15kV class

Note)

H4-12

Memo

www.lsis.bizⓒ 2008.11 LSIS Co.,Ltd. All rights reserved.

2011. 10 Vacuum Circuit Breakers /Vacuum Interrupter(E) 2008. 11/(05) 2011. 10 Printed in Korea STAFF

�� For your safety, please read user's manual thoroughly before operating.

�� Contact the nearest authorized service facility for examination, repair, or adjustment.

�� Please contact a qualified service technician when you need maintenance.Do not disassemble or repair by yourself!

�� Any maintenance and inspection shall be performed by the personnel having expertise concerned.Safety Instructions

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Specifications in this catalog are subject to change without notice due to continuous product development and improvement.