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

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

Name: ZN28G 12 Indoor Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Rated Voltage
Brand: Metalwork
Price: 1 USD

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

Brand Name : Metalwork

Model Number : ZN28G-12

Certification : CE, ISO, CCC

Place of Origin : China

MOQ : 1 set

Price : Negotiable

Payment Terms : L/C, T/T

Supply Ability : 100 sets per month

Delivery Time : 20 days

Packaging Details : Plywooden package

Model : ZN28G-12

Breaking Capacity : 20, 25, 31.5, 40, 50KA

Rated Voltage : 12KV

Rated Current : 630A, 1250A,1600A, 2000A, 2500A, 3150A,4000A

Mechanical Life : 10000 times

Motor Voltage : DC/AC 110V 220V

Mechanism : Spring Energy Charging

Warranty : 1 year

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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.

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

Technical Parameters:

Items	Unit	Date
Rated voltage	KV	12
Rated impulse withstand voltage		75
Rated short-time power frequency withstand voltage (1min)		42
Rated frequency	Hz	50
Rated short-circuit breaking current	KA	20	25	31.5	40
Rated current	A	630 1000 1250	630 1000 1250 1600	1250 1600 2000 2500	1600 2000 2500 3150 4000
Rated short-time withstand current	KA	20	25	31.5	40
Rated peak tolerable current		50	63	80	100
Rated short-circuit making current (peak value)		50	63	80	100
Secondary circuit power frequency withstand voltage (1min)	V	2000
Rated operation sequence		O－0.3S－CO－180S－CO O－180S－CO－180S－CO (at 40KA)
Rated duration of short circuit current	S	4
Rated single/back-to-back capacitance bank breaking current Set breaking current	A	630/400
Rated short-circuit breaking current DC flow percentage		≤35%
Average closing speed	m/s	0.6±0.2
Average opening speed	m/s	1.2±0.3
Opening time	ms	≤60
Closing time	ms	≤80
Mechanical life	times	10000
Rated short-circuit breaking current breaking times	times	30
Allowable wear accumulate thickness of moving and static contacts	mm	3
Rated closing operating voltage	v	AC110/220 DC110/220
Rated opening operating voltage	v	AC110/220 DC110/220
Rated voltage of energy storage motor	v	AC110/220 DC110/220
Contact opening distance	mm	11±1
Contact stroke	mm	4±1
Contact bounce time	ms	≤2
Three - phase opening and closing heterogeneity	ms	≤2
Opening contact rebound amplitude	ms	≤3
Main circuit resistance	Ω	≤40 (≤25 at 40KA)

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