vacuum circuit-breakers - meidensha corporation · · 2014-12-01vbt-120525b vbt-120725b...

Outdoor Type

Vacuum Circuit-Breakers

Vacuum for Electricityand for Earth

Less maintenanceSustainability

Porcelain Insulator Type

Specifications in this catalog are subject to change without notice. GB75-2158 D As of Jan., 20112011-1ME（7.5L）0.5L

ThinkPark Tower, 2-1-1, Osaki, Shinagawa-ku, Tokyo, 141-6029 Japan

Phone: 81-3-6420-7510 Facsimile: 81-3-5745-3053

www.meidensha.co.jp

Draw-Out Type VCB

VCB for SF6 Gas Insulated Switch-gear (Model : Vsub.-G)

VK type VCB is also available in draw-out version upon request.

Outdoor TypeVacuum Circuit-Breakers

明電カタログ-13 3

CT

72.5kV VCB

ES

M

明電カタログ-143

VD

51 3

CH

3PEDS172.5kV 800A

3PEDS272.5kV 800A

VCB72.5kV 800A 20kA

66kV 3φ 3W 50HzAn example of two-circuit incoming lines by CV cable

15VA1A

CT×3

LA×384kV10kA

kVA

PCT

66 6.6kV

3φT

ES

51G

VD

WH DWH

51 3CT×3

ES

51G

Fig.12 Single Line Diagram of 72.5kV Draw-out Type VCB

Fig.13 Typical Single Line Diagram

72.5kV Draw-out Type VCB

21


Features1. Reduction of Maintenance Labor and High ReliabilityThe vacuum circuit-breaker features the lowest arc volt-age and minimum arc energy as compared with gas circuit breaker, providing minimum wear of contact points, ex-tremely long service life, and low life cycle cost because of simplified maintenance.

2. Superb Interrupting Performance The insulation recovery characteristic is outstanding. The current interrupting performance is excellent against a short-line fault. Even during the intrusion of a high current due to multiple lightning surges, current is interrupted in the vacuum inter-rupter within the period of half a cycle and equipment is fully protected. Insulation coordination is carefully planned between the inside and outside of the breaking section and between line and ground.

Applicable StandardThese vacuum circuit-breakers are designed and manu-factured to comply with IEC standard.

Standard SpecificationTable 1. Standard Specification of Circuit-Breakers

Type of CB Porcelain type

Model No. VK-62 VK-63 VT-124 VT-122 VT-123

Type No. VBK-60525BA

VBK-60725BA

VBK-60525NA

VBK-60725NA

VBK-60532BA

VBK-60732BA

VBK-60532NA

VBK-60732NA

VBK-120740B

VBT-120525B

VBT-120725B

VBT-120532B

VBT-120732B

Voltage (kV) 72.5 145

Rat

ing

s

Withstand voltage

1 min power frequency (kV) (rms)

160 275

1.2 x 50µs Impulse (kV) (peak)

350 650

Frequency (Hz) 50/60 50/60

Normal Current (A) 1250/1600 2000 1250/1600 2000 1250/1600 2000 1250/1600 2000 2000 1250/1600 2000 1250/1600 2000

Short-circuit breaking current (kV)*1 25 (20) 31.5 (25) 40 25 31.5

Rate of rise of recovery voltage (kV/µs) 0.75 2.0

Short-circuit making current (kA) 63 (50) 80 (63) 100 63 80

Short-time current (1 sec)*2 25 (20) 31.5 (25) 40 25 31.5

Opening time (sec)*1 0.045 (0.03) 0.035 0.07

Making time with no-load (sec) 0.12 0.09 0.12

Operating duty O-3 min-CO-3-min-CO

CO-15 sec-COO-0.3 sec-CO-3 min-CO

O-3 min-CO-3-min-COO-0.3 sec-CO-3 min-CO

Closing operating mechanism Motor wound spring Pneumatic Motor wound

spring Pneumatic Motor wound spring

Closing and tripping control voltage (DC.V) 24, 48, 110, 125, 220, 250

Supply voltage of spring charging motor

(DC.V) 110, 125, 220, 250

(AC.V) Three-phase 50Hz:220, 380 60Hz:208, 415

Supply voltage of compressor motor (AC.V) Three-phase 50Hz:220, 380 60Hz:208, 415

Operating pressure MPa (kgf/cm2) −− 1.5 (15) −− 1.5 (15) −−

Gas pressure in pole MPa (kgf/cm2) 0.1 (1.0) SF60.1 (1.0) SF6 or

0.07 (0.7) Dry air 0.1 (1.0) SF60.1 (1.0) SF6 or

0.07 (0.7) Dry air0.12 (1.2)

SF60.1 (1.0)SF6

Capacity of air receiver (Liter) −− 57 −− 57 −−

Mass (kg) 1900 1600 1900 1600 2900 4200

Acc

esso

ries

Integrated on CB

Aux. switch 6NO, 6NC

Operation counter 1 pc.

Pressure gauge 1 pc. 2 pcs. 1 pc. 2 pcs. 1 pc.

Knife switch 2 pcs.

Space heater 1 pc.

Compressor −− 1 set −− 1 set −−

Optional item

Remote-Local selector switch 1 pc.

On-Off control switch 1 pc.

On-Off indication lamp 1 set

Aux. switch 10 NO, 10NC

Special tool Manual operating handle 1 pc.

Note : *1. This short-circuit breaking current shows that for VCB of which breaking time is 5 cycle. The values of short-circuit current and opening time of the VCB of which breaking time is 3 cycle are shown in parentheses.　 *2. As a sub-standard rating, duration of 3 sec is acceptable.


3


4

Explanation of 72.5kV Vacuum Circuit-Breakers

1. External View and Dimensions 3. Construction

2. Connection Diagram

Fig.1 Outline Drawing of 72.5kV VCB

Fig.3 Internal Construction of 72.5kV VCB

Fig.2 Connection Diagram of 72.5kV VCB

Fig. 3 shows the illustration of the construction, The operating mechanism adopts a cam type spring clo-sure system, and the shape of the cam is designed so that the amount of surplus energy can be reduced to a minimum at time of closure, the cam output can always exceed the load with ample allowance in any position during closing operation, the closing characteristics are stable and impact caused by operation can be greatly reduced.

The possible operational duty is either O – 1 min – CO – 3 min – CO, or O – 0.3 sec – CO -3 min – CO, or CO – 15 sec – CO.The motor used to charge up the closing spring can be either AC type or DC type. The closing spring is imme-diately energized after the VCB is closed.


3500

2500 880Unit：mm

Operating box

Cable pipe Earth terminal

Mounting leg

1250240 1250 760

885

3145

2300

4090

200


Link

LinkLink

Roller

HookMain hook

Closing cam

Closing spring

Tripping spring

VI fixing lead

VI moving lead

Insulated operation rod

Operating mechanismLink mechanism

Speed regulator

Lever

Closing coilTripping coil

Symbol Description

LS1 Limit switch

LKS Lockout switch

52T Tripping coil

52C Closing coil

52 Auxiliary switch

94 Anti-pumping relay

88MF Magnetic contactor

88MA Magnetic contactor

52M Motor

MCB Molded case CB

H Space heater

KS1 Knife swicth with fuse

5


6


3. Construction (1) Pole UnitInside of the pole unit is filled with SF6 gas to prevent the condensa-tion of moisture.

(2) Operating MechanismSince the tripping spring is ener-gized by the closing spring during the closing sequence, accomplish-ment of rapid auto-reclosing duty is possible. As shown in Fig. 7, the operating mechanism has a very simple construction and reduce 28% operation energy comparing with former version. This construction assures long op-erational life and minimal chance for trouble.

Explanation of 145kV Vacuum Circuit-Breakers (Single Break)

1. External View and Dimensions


4430

1950 1950

875

500 305

SupportingInsulator

Local Control Cabinetmade of painted steelConduit

made of PVC

Manual charginghandle

(inside of LCC)

Interrupter

φ114 70

3900

35

2500

322

200

5435

35

5500


A1Upper terminal

A4VI fixed lead

A9Lower terminal

A2Upper conductor

A5VI fixed contact

A6VI moving contact

A31Pressing spring

A30Lower conductor

A12Supporting insulator

A10Insulating rod

A3（VI）Vacuum Interruptor

A11insulatorBreaker-section

A7VI moving lead

A8Contact


D2 Speed reducer

D1 Moter

C11 Rod

H Speed regulator

J3 Engaged shaft

E2 Cam

G5 Link

G4 Lever

J2

Engaged Lever

P Closing electromagnet

G1 Closing spring

G2 Closing hook

B6c Rotating shaft

B6b Rotating shaft

A10 Insulated operation rod

A4 VI fixing lead

C3 Link（B）

C4 Opening spring

A7 VI moving lead

F7 Main hook

O Tripping electromagnet

J1 Tripping hook

F Toggle link assy

Fig.4 Outline Drawing of 145kV VCB

Fig.6 Internal Construction of 145kV VCB

Fig.7 Construction of Operating MechanismFig.5 Connection Diagram of 145kV VCB (Single Break)

Symbol DescriptionLS1 Limit switch

LS1X Limit switchLKS Lockout switch52T Tripping coil52C Closing coil94 Anti-pumping relay

88MA Magnetic contactor88MF Magnetic contactorMX Magnetic contactor52M Motor

F1, F2 Field windingTK Timer

MCB Molded case CBSA Surge absorberR ResistanceC CondenserH Space heater

KS Knife swicth with fuse

7 8


(2) Operating MechanismSince the tripping spring is energized by the closing spring during the closing sequence, accomplishment of rapid auto-reclosing duty is possible. As shown in Fig. 11, the operat-ing mechanism has a very simple construction employing roller and needle bearings. This construction assures long operational life and minimal chance for trouble.

(1) Pole UnitThe pole unit of 145kV VCB accommodate the two VI’s in series.

Explanation of 145kV Vacuum Circuit-Breakers (Double Break in Series)

1. External View and Dimensions


1900

120 2040 120 2040 120 200

730

750

1650

637

4420 4800

2752

100

1900 1150

5300

350

Unit：mm

Cable pipe

Earth terminal


5 6 9 7 856978

1 2 3 3 2 14 412

10

11

No. Description No. Description1 Main circuit terminal 7 VI moving contact2 Vacuum interrupter (VI) 8 Moving lead3 Ring contact 9 Breaking porcelain tube4 Pressing spring 10 Supporting porcelain tube5 Fixed lead 11 Insulated operating rod6 VI fixed contact 12 link

Fig.8 Outline Drawing of 145kV VCB


Fig.9 Connection Diagram of 145kV VCB

Symbol DescriptionLS1 Limit switchLS2 Limit switchLS3 Limit switchLKS Lockout switch52T Tripping coil52C Closing coil94 Anti-pumping relay

88MR Magnetic contactor88ML Magnetic contactor88MF Magnetic contactor88MT Magnetic contactor52M Motor

F Field windingMCB Molded case CBSA Surge absorberH Space heater

KS Knife swicth with fuse

明電カタログ-12 3

Trip coil

Closing coil

Closing hook

Trip hook

Closing spring Tripping spring

Link mechanism

Motor

Fig.10 Internal Construction of 145kV VCB

Fig.11 Construction of Operating Mechanism

3. Construction

vacuum circuit-breakers - meidensha corporation · · 2014-12-01vbt-120525b vbt-120725b...

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