ZN28G-12 series indoor high-voltage vacuum circuit breaker-[Quotation-data]--Shanghai Huabang Industrial Business-www.91way.com

Product name：

ZN28G-12 series indoor high-voltage vacuum circuit breaker

specification：

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Category：

High voltage electrical appliances -- Indoor vacuum circuit breaker

Price：

factory price

Brand：

Shanghai

Place of Origin：

China

Available Quantity：

batch

delivery cycle：

Spot goods (or inquire by telephone)

Shanghai Beiyuan Industry and Trade Co.,Ltd
+86-21-66770508
+86-139101609058

91way@163.com
13916500500(Wechat)

ZN28G-12 series indoor high-voltage vacuum circuit breakerDetailed product description：

Product Overview
1. The ZN28A-12 series indoor AC high-voltage vacuum circuit breaker is mainly used in fixed switchgear, as a protection and control component for electrical equipment in industrial and mining enterprises, power plants, and substations, and is suitable for frequent operation in places.
2. ZN28G-12 is a derivative model of ZN28A-12, which adopts an integrated layout of circuit breaker and operating mechanism in front and back, making installation and use more convenient and stable. It can be directly configured with CD17 electromagnetic mechanism and CT19 spring mechanism.
3. ZN28C-12 is a derivative model of ZN28A-12, which has a handcart structure and can be assembled with KYN1-12 handcart, KYN18-12 handcart, JYN2-12 handcart, JYN3-12 handcart. The circuit breaker and operating mechanism are arranged vertically, and can be configured with CD17 electromagnetic mechanism or CT19 spring mechanism.

ZN28G-12 series indoor high-voltage vacuum circuit breaker models and their meanings

Environmental conditions for use
1. Surrounding air temperature: upper limit+40 ℃, lower limit -10 ℃ (storage and transportation allowed at -30 ℃);
2. Relative humidity: daily average not exceeding 95%; Monthly average not exceeding 90%;
Daily average saturated vapor pressure: The daily average is not greater than 2.2KPa, and the monthly average saturated vapor pressure is not greater than 1.8kPa,
3. Altitude: not exceeding 2000m (2500m is considered high prototype);
4. Seismic intensity: not exceeding 8 degrees;
5. A place without fire, explosion hazard, serious pollution, chemical corrosion, and severe vibration.

Main technical parameters of ZN28G-12 series indoor high-voltage vacuum circuit breaker

serial number	project	unit	Parameters
serial number	project	unit	ZN28A-12/630、1000、1250-20	ZN28A-12/630、1250、1600-25	ZN28A-12/630、1250、2500-31.5
one	rated voltage	kV	twelve	twelve	twelve
two	rated current	A	630 1000 1250	630 1250 1600	1250 1600 2000 2500
three	Rated short-circuit breaking current	kA	twenty	twenty-five	thirty-one point five
four	Rated short-circuit closing current (peak)	kA	fifty	sixty-three	eighty
five	Rated withstand current (peak)	kA	fifty	sixty-three	eighty
six	Rated short-time withstand current	kA	twenty	twenty-five	thirty-one point five
seven	Rated short-time duration	s	four	four	four
eight	Rated short-circuit breaking current breaking times	time	fifty	fifty	fifty
nine	Rated operating sequence		Min-0.3s HeFen-180s HeFen
ten	1-minute power frequency withstand voltage (effective value)	kV	forty-two	forty-two	forty-two
eleven	Lightning impulse withstand voltage		seventy-five	seventy-five	seventy-five
twelve	mechanical life	time	ten thousand	ten thousand	ten thousand
thirteen	Contact opening distance	mm	11±1	11±1	11±1
fourteen	Contact itinerary	mm	4±1	4±1	4±1
fifteen	Synchronization of three-phase opening and closing	ms	≤2	≤2	≤2
sixteen	Bouncing time of closing contact	ms	≤2	≤2	≤2
seventeen	Center distance between poles	mm	250±5	250±5	250±5
eighteen	Average opening speed (before contact with oil buffer)	m/s	0.7～1.3	0.7～1.3	0.9～1.3
nineteen	Average closing speed	m/s	0.4～0.8	0.4～0.8	0.4～0.8
twenty	Accumulated allowable wear thickness of dynamic and static contacts	mm	three	three	three

ZN28G-12 series indoor high-voltage vacuum circuit breaker（schematic diagram）