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50KA High Voltage Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Upto 4000A

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50KA High Voltage Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Upto 4000A

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Brand Name :	Metalwork
Model Number :	ZN28G-12
Certification :	CE, ISO, CCC
Price :	Negotiable
Payment Terms :	L/C, T/T
Supply Ability :	100 sets per month
Delivery Time :	20 days

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50KA High Voltage Vacuum Circuit Breaker Three Phase AC 50HZ 12KV Upto 4000A

12KV Indoor High-voltage Vacuum Circuit Breaker

ZN28G-12 indoor AC high-voltage vacuum circuit breaker is an indoor switching equipment with three-phase AC 50HZ and rated voltage 12KV.

Features of 12KV vacuum circuit breaker:

1. Simple structure, small size and the operating mechanism is the spring energy storage type.

2. It can be operated by AC power or DC power supply.

3. Compound insulated complted structure, small size, low noise and easy installation.

4. Ceramic and glass arc-chutes, with high vacuum insulating performance and special design, high rupture ability, long endurance and no explosive danger.

5. According to different customers' requirements, suitable for all kinds of switchgear.

Mounting Dimension:

Mounting :

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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