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Wenzhou Unisun Electric Co., Ltd.

High Voltage Vacuum Circuit Breaker, Vacuum Circuit Breaker, Vcb manufacturer / supplier in China, offering Vcb 11kv up to 40.5kv Indoor High Voltage Vacuum Circuit Breaker, Fix Version 0.4kv Electric Power Distribution Cabinet Low Voltage Switchgear, 33kv Draw-out Type Air Insulation Metal Enclosed Switch Cabinet and so on.

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Supplier Homepage Product Vaccum Circuit Breaker Vcb 11kv up to 40.5kv Indoor High Voltage Vacuum Circuit Breaker

Vcb 11kv up to 40.5kv Indoor High Voltage Vacuum Circuit Breaker

FOB Price: US $200 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $200/ Piece
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Port: Ningbo, China
Production Capacity: 50000
Payment Terms: L/C, T/T, Western Union, Paypal, Money Gram

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Basic Info
  • Model NO.: VS1
  • Operation: Energy-storage Type
  • Arc-extinguishing Medium: Vacuum
  • Structure: Spring Mechanism
  • Type: Circuit Breaker
  • Certification: VDE, ISO9001-2000, CE, UL, CB, CCC
  • Rated Voltage: 12kv, 17.5kv, 24kv, 36kv
  • Withstand Voltage at 50 Hz: 28kv, 38kv, 50kv, 70kv
  • Trademark: UNISUN
  • Specification: 12kv, 17.5kv, 24kv, 36kv
  • HS Code: 8535210000
  • Breaking Capacity: High Voltage Circuit Breakers
  • Speed: High-Speed Circuit Breaker
  • Installation: Insert
  • Poles Number: 3
  • Function: Circuit-Breaker Failure Protection
  • Standards: IEC 62271-100
  • Rated Insulation Voltage: 12kv, 17.5kv, 24kv, 36kv
  • Rated Frequency: 50-60Hz
  • Transport Package: Wooden
  • Origin: China
Product Description
VCB 11kV up to 40.5kV Indoor High Voltage Vacuum Circuit Breaker


iVS1 series medium voltage vacuum circuit-breakers with lateral operating mechanism feature the separate pole construction technique.
The operating mechanism is the EL trip-free stored energy type with independent opening and closing regardless of the operator's action. The EL operating mechanism is widely used in all VS1 series circuit-breakers with frontal control.
The circuit-breaker can be remote controlled when fitted with dedicated electrical accessories (gearmotor, opening and closing release).
The operating mechanism, the three poles and the current sensors (if installed) are assembled on a metal frame without wheels. The construction is extremely compact, strongly built and low in weight. 
iVS1 series circuit-breakers with lateral operating mechanisms are life-long sealed pressure devices (Standards IEC 62271-100 and CEI EN 62271-100). 
Additionally, iVS1 series circuit-breakers have been type tested for low temperature and marine applications (Germanischer Lloyd).
iVS1 vacuum circuit breakers have been designed for indoor use and air insulated switchboards.
Vacuum circuit-breakers have particular advantages for use in networks where there is a high switching frequency in the working current range and/ or where a certain number of short- circuit breaking operations are expected. VS1 vacuum circuit- breakers are suitable for auto reclosing and have exceptionally high operating reliability and long life. The circuit- breakers are notable for their compact design, small dimensions together with high capacity. The operating mechanisms have a low maintenance requirement and the interrupters are maintenance- free throughout their service lives. They are well suited to all load breaking operations which occur in practice, and in particular:
  • Short-circuit currents;
  • Overhead lines under load and, no-load conditions;
  • Cables under load and no-load conditions;
  • Transformers under load and no-load conditions;
  • Generators under load and no-load conditions;
  • Ripple control system;
  • Capacitor banks(also parallel switching) and Motors with starting currents above 600A;
Fields of application
Below is the list of SM6 range units used in MV/LV transformer substations and industrial distribution substations:
  • Cable control and protection
  • Overhead control and protection
  • Transformers and distribution substations
  • Motor and transformer control and protection
  • Generator control and protection
  • Capacitor bank control and protection
Diagrammatic sketch

Circuit-breaker operating mechanism
A) Open/closed auxiliary contacts
B) Geared motor for closing spring charging
C) Built-in closing spring charging lever
D) Mechanical signalling device for circuit-breaker open/closed
E) Mechanical operation counter
F) Plug-socket connectors of electrical accessories in the truck
G) Signalling device for closing springs charged/discharged
H) Service releases
I) Closing pushbutton
L) Opening pushbutton
M) Operating mechanism locking electromagnet
N) Additional shunt opening release
O) Transient contact
P) Contacts for signalling spring charged/discharged
Main characteristics
Rated voltageUr  [kV]1217.52436
Rated insulation voltageUs  [kV]1217.52436
Withstand voltage at 50HzUd  (1min) [kV]28385070
Impulse withstand voltageUp  [kV]7595125170
Rated frequencyfr  [Hz]50-60
Rated normal current(40ºC)Ir  [A]630 / 1250 / 1600 / 2000 / 2500 / 3150 / 4000
Rated breaking capacity (rated symmetrical short-circuit current)Isc  [kA]25 / 31.5 / 40
Rated short-time withstand current(4s)Ik  [kA]25 / 31.5 / 40
Making capacityIp  [kA]63 / 80 / 100
Operation sequence [O-0.3s-CO-15s-CO]
Opening time[ms]40...60
Arcing time[ms]10...15
Total breaking time[ms]50...75
Closing time[ms]50...80
Operating temperature[ºC]15 ... +40
Our Company
Vcb 11kv up to 40.5kv Indoor High Voltage Vacuum Circuit Breaker

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Vcb 11kv up to 40.5kv Indoor High Voltage Vacuum Circuit Breaker
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