Shanghai, China
Business Type:
Trading Company
Number of Employees:
Year of Establishment:
Management System Certification:
Average Lead Time:
Peak season lead time: one month
Off season lead time: one month
Sample Available

Vacuum Circuit Breaker, Earth Leakage Circuit Brkaker, Residual Current Circuit Breaker manufacturer / supplier in China, offering Indooor High Voltage Vacuum Circuit Breaker, Tripleye Rods, Porcelain Housed Metal Oxide Surge Arresters and so on.

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Indooor High Voltage Vacuum Circuit Breaker

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Min. Order / Reference FOB Price
1 Piece US $50-100/ Piece
Port: Shanghai, China
Production Capacity: 5000/Year
Payment Terms: L/C, T/T, D/P, Western Union, Paypal
Breaking Capacity: High Voltage Circuit Breakers
Operation: Energy-storage Type
Speed: High-Speed Circuit Breaker
Arc-extinguishing Medium: Vacuum
Installation: Fixed
Structure: Vcb

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Basic Info

Model NO.: ZN28-12
Poles Number: 1
Type: Circuit Breaker
Function: Circuit-Breaker Failure Protection, Overcurrent Protection
Certification: ISO9001-2000, CCC, GB1984
Rated Voltage: 12kv
Rated Mechanical Life: 10000 Times
Trademark: None
Transport Package: Standard External Transport Packaging
Specification: 780X581
Origin: Zhejiang, China(Mainland)
HS Code: 85362000

Product Description

Product Info

ZN28(A)-12 series indoor high-voltage vacuum circuit breaker is a kind of three-phase indoor high-voltage switch of rated voltage 12kV and AC 50Hz, which comply with GB1984 standard .

Indooor High Voltage Vacuum Circuit Breaker
Main parameter

Rated VoltagekV12
Rated CurrentA630, 1000
630, 1000
1250, 1600
2000, 2500
1600, 2000
Rated Short-circuit Breaking CurrentkA202531.540
Rated Short-circuit Making Current (Peak)kA506380100
Rated Peak Withstand CurrentkA506380100
4s Rated Short-time Withstand CurrentkA202531.540
Rated Insulation LevelPower Frequency Withstand Voltage
(Rated Breaking Before and After)
kV42 (Break 48)42
Lightning Impulse Withstand Voltage
  (Rated Breaking Before and After)
kV75 (Break 84) 75
Rated Operating Sequence O-0.3s-C O-180s-CO
Mechanical Lifetimes10000
Rated Short-circuit Current Breaking Timestimes50
Rated Closing Voltage of Operator (DC)V110, 220220
Rated Closing Current of Operator (DC)A71128
Rated Opening Voltage of Operator (DC)V110, 220
Rated Opening Current of Operator (DC)A3.0, 1.5
Clearance Between Open Contactsmm11± 1
Over travel of Contactsmm4± 1
Three-phase Opening/Closing Synchronizationms≤ 2
Closing Bouncing Timems≤ 2
Average Opening Speed (excluding Oil Bumper)m/s1.2± 0.3
Average Closing Speedm/s0.6± 0.2
Opening TimeHighest Operating Voltages≤ 0.06
Lowest Operating Voltages≤ 0.08
Closing Times≤ 0.2
Main Loop Resistance of Each Phaseμ Ω<50<35
Total Thickness of Permissible Wear of Moving and Static Contactsmm3
Oil Bumper Buffer Tripmm10
Our company

Our company
SHANGHAI POWERY INDUSTRIES CO., LTD. ( SPI ) corporate group has been dealing with the interfaces in the flow of electricity ever since it was founded back in 2011. SPI's three groups - Pole Line Hardware( Qingdao, China ),High Voltage Line Protection(Lishui, China ), Distribution Transformers( Shinseong, Korea ) - offer a unique set of brands and products. As a specialist in energy transmission and distribution, we offer our customers and business partners a range of sophisticated, future-ready products: For all voltage ranges and wherever reliable, long-lasting systems are needed for powerful energy grids. We are already well-established in all key global markets and are continuing to strengthen our brand on a worldwide scale.SPI has identified key factors that will be instrumental to its sustainabilit

Indooor High Voltage Vacuum Circuit Breaker


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