ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage

Brand Name:Metalwork
Certification:CE, ISO, CCC
Model Number:ZN28G-12
Minimum Order Quantity:1 set
Delivery Time:20 days
Payment Terms:L/C, T/T
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Verified Supplier
Location: Wuxi Jiangsu China
Address: No. 488, Cuishan Road, Anzhen District, Wuxi City, Jiangsu Province, China
Supplier`s last login times: within 14 hours
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Product Details

ZN28G-12 Indoor High-voltage Vacuum Circuit Breaker

General:

ZN28G-12 indoor AC high-voltage vacuum circuit breaker is an indoor switching equipment with three-phase AC 50HZ and rated voltage 12KV. It is used for the protection and control of power grid equipment and industrial and mining enterprises. Because of the special advantages of vacuum circuit breaker, it is especially suitable for frequent operation, or many times to break the short circuit current.


The vacuum circuit breaker has the advantages of simple structure and small volume, and the operating mechanism is the spring energy storage type. It can be operated by AC power or DC power supply, and up to three overcurrent trip devices can be installed. The circuit breaker adopts the integrated design of the operating mechanism and the circuit breaker body as the fixed installation unit. The vacuum arc extinguishing chamber part and the operating mechanism part are arranged front and back. The composite insulation overall structure is easy to install, no adjustment and little maintenance.





Technical Parameters:

ItemsUnitDate
Rated voltage

KV

12
Rated impulse withstand voltage75
Rated short-time power frequency withstand voltage (1min)42
Rated frequencyHz50
Rated short-circuit breaking currentKA202531.540
Rated currentA

630 1000

1250

630 1000

1250 1600

1250 1600

2000 2500

1600 2000 2500 3150 4000
Rated short-time withstand currentKA202531.540
Rated peak tolerable current506380100
Rated short-circuit making current (peak value)506380100
Secondary circuit power frequency withstand voltage (1min)V2000
Rated operation sequence

O-0.3S-CO-180S-CO

O-180S-CO-180S-CO (at 40KA)

Rated duration of short circuit currentS4

Rated single/back-to-back capacitance bank breaking current

Set breaking current


A630/400
Rated short-circuit breaking current DC flow percentage≤35%
Average closing speedm/s0.6±0.2
Average opening speedm/s1.2±0.3
Opening timems≤60
Closing timems≤80
Mechanical lifetimes10000
Rated short-circuit breaking current breaking timestimes30
Allowable wear accumulate thickness of moving and static contactsmm3
Rated closing operating voltagevAC110/220 DC110/220
Rated opening operating voltagevAC110/220 DC110/220
Rated voltage of energy storage motorvAC110/220 DC110/220
Contact opening distancemm11±1
Contact strokemm4±1
Contact bounce timems≤2

Three - phase opening and closing

heterogeneity

ms≤2
Opening contact rebound amplitudems≤3
Main circuit resistanceΩ≤40 (≤25 at 40KA)




China ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage supplier

ZN28G - 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage

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