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
Outdoor TypeVacuum Circuit-Breakers
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.
Outdoor TypeVacuum Circuit-Breakers
3
Outdoor TypeVacuum Circuit-Breakers
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.
明電カタログ-013
3500
2500 880Unit:mm
Operating box
Cable pipe Earth terminal
Mounting leg
1250240 1250 760
885
3145
2300
4090
200
明電カタログ-033
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
Outdoor TypeVacuum Circuit-Breakers
6
2. Connection Diagram
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
明電カタログ-043
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
明電カタログ-063
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
明電カタログ-073
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
Outdoor TypeVacuum Circuit-Breakers
(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
明電カタログ-083
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
明電カタログ-103
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
2. Connection Diagram
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