Kechang Electric - 12KV Vacuum circuit breaker

Vacuum circuit breaker
DZXD2A-12P series indoor high-voltage sealed vacuum circuit breaker is an upgraded version of the indoor high-voltage switchgear VS1 (hereinafter referred to as the new VS1), suitable for rated voltage 12kV, frequency 50~60Hz three-phase AC power system, for industrial and mining enterprises and substations as electrical facilities control and protection, especially suitable for places with frequent operation or multiple short-circuit current breaking under rated current, can be used for fixed installation units, and can also be used as a handcart unit. Generally used with indoor air insulation switch cabinets (such as: KYN28 XGN2 XGN66, etc.).

The DZXD2A-12P series can be widely used in power plants, substations, metallurgy, petrochemicals, railways, airports, manufacturing, residents, communities, etc.
The DZXD2A-12P series can meet the needs of rated current 630A~4000A and rated short-circuit breaking power 20~50kA. It can store energy with AC and DC power supplies or manually. It has the advantages of small size, strong breaking capacity, high insulation, no pollution, and no explosion hazard. This product can reliably protect the distribution facilities under normal conditions or fault conditions of the distribution system. It can be operated frequently and break short-circuit current multiple times (at rated values).
The DZXD2A-12P series of sealed poles uses special imported materials and special processes. The vacuum interrupter and upper and lower outlets are cast with epoxy resin. The product has a very low partial discharge value and a high voltage resistance level. It is not easily damaged after high and low temperature impact and mechanical impact, and is suitable for various working environments.
The vacuum interrupter in the ZXD2A-12P series solid-sealed pole adopts reliable metallization technology and brazing structure, one-time sealing technology, special aging, pressurized leak detection and other advanced technologies to ensure that the product can maintain reliable vacuum throughout its life and can operate with power for a long time. The DZXD2A-12P series complies with relevant standards such as GB1984-2003, JB3855-1996 and IEC.

Number	Parameter name	Unit	Technical Parameters
1	Rated voltage	KV	12
2	Rated short-time frequency withstand voltage (1 min)	KV	42
3	Rated lightning impulse withstand voltage (peak)	KV	75
4	Rated frequency	HZ	50
5	Rated current	A	630
6	Rated short-circuit breaking current	KA	20
7	Rated short-time withstand current	KA	20
8	Rated short circuit duration	S	≤0.04
9	Rated short-circuit closing current	KA	50
10	Rated peak withstand current	KA	50
11	Number of rated short-circuit current starts	times	30
12	Rated individual capacitor bank opening current	A	≤630
13	Rated back-to-back capacitor bank opening current	A	≤400
14	Rated capacitor bank closing inrush current	KA	12.5（frequency≤1000HZ）
15	Closing time	ms	≤80
16	Split time	ms	Maximum Voltage	≤40
		ms	Rated Voltage	≤50
		ms	Minimum Voltage	≤60
17	Time of ignition	ms	≤15
18	Mechanical life (M2)	times	30000
19	Allowable cumulative thickness of dynamic and static contact wear	mm	3
20	Rated closing operating voltage	V	AC/DC 220
21	Rated breaking operating voltage	V	AC/DC 220
22	Rated operating voltage of energy storage motor	V	AC/DC 220
23	Rated power of energy storage motor	W	80(40KA Motor speed100W）
24	Energy storage time	s	≤15
25	Contact opening distance	mm	9±1
26	Over traveling distance	mm	3.5±0.5
27	Contact closing bounce time	ms	≤2
28	Three-phase switching and closing non-synchronous	ms	≤2
29	Contact splitting rebound amplitude	mm	≤3
30	Contact closing contact pressure	KA	20
30	Contact closing contact pressure	N±8%	2200
31	Average breaking speed (contacts separated by 6mm)	m/s	1.1±0.2
32	Average closing speed (6mm contact closure)	m/s	0.6±0.2
33	Dominant electric circuit resistance	A	630
34	Dominant electric circuit resistance	μΩ	≤50
34	Rated operating sequence (1) 20~31.5KA		Minutes - 0.3s - combined minutes - 180s - combined minutes
35	Rated sequence of operation (2) 40KA		Minutes - 0.3s - combined minutes - 180s - combined minutes
35	Secondary circuit frequency withstand voltage (1min)	V	2000

12KV Vacuum circuit breaker

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12KV Vacuum circuit breaker

DZXD2A-12P Indoor high voltage sealed vacuum circuit breaker