33KV Recloser Vacuum Circuit Breaker

Name: 33KV Recloser Vacuum Circuit Breaker
Brand: Zhuhai Gopower Smart Grid Co., LTD

Breaker Switch Unit with Encapsulated Vacuum Interrupter

Each 33kv automatic circuit recloser is embedded in a solid-insulated pole made of weather-proof cyclo aliphatic epoxy resin. This enables a small design as well as resistance against environmental effects.

The switch unit in vacuum type circuit breaker is comprised of three poles, the operating mechanism, and the operating mechanism housing. The sequence of the poles is A -B – C or 1 – 2 - 3 (sequence left to right when viewed from the lower terminal side of the recloser switch unit.

Drawing of 36KV Vacuum Circuit Breaker

Breaker Principle and Design of 36KV Vacuum Circuit Breaker

ZW32 series 33KV circuit breakers are used in distribution systems to make and break normal and fault currents. 33kv outdoor circuit breakers made by our electric power equipment company are fully equipped with sensors and a controller to provide a means of protection and control. In case of a line fault, 33kv vacuum circuit breaker can break and make currents several times, thus avoiding longer network interruptions due to temporary faults. The manufacture, design, and testing of the vacuum recloser is based on current standards IEC 62271-100.

Technical parameters of 33KV Vacuum Circuit Breaker

The 33kv vacuum circuit breaker specifications are as follows.

Table 1-Circuit Breaker Rated Technical Data

No.	Name		Unit	Parameter
1	Rated voltage		kV	36
2	1 min rated power frequency withstand voltage			70
3	Rated lightning impulse withstand voltage (peak)			170
4	Rated current		A	630
5	Rated frequency		Hz	50/60
6	Rated short-circuit breaking current		kA	12.5
7	Rated short-circuit making a current (peak)			31.5
8	Rated peak withstand current			31.5
9	Rated short-time withstand current (4s)		kA	12.5
10	Rated operating sequence			O-0.3s-CO-180s-CO
11	Closing time		ms	25-60
12	Opening time			18-45
13	Breaking times for rated short-circuit breaking current		times	30
14	Mechanical life			10000
15	Secondary circuit 1min power frequency withstand voltage		V	2000
16	Charging motor rated power		W	40
17	Charging motor rated voltage		V	DC24
18	Rated closing operation voltage			DC24
19	Rated opening operation voltage			DC24
20	Motor charging time		s	≤12
21	Weight	Circuit breaker	kg	130
		A circuit breaker with dis-connector		165

Table 2 - Main Mechanical Characteristics of Circuit Breaker

No.	Name	Unit	Parameter
1	Contact travel	mm	12-14
2	Contact over-travel		2-4
3	Phase Distance (Center to Center)		410±2
4	Contact closing bounce time	ms	≤3
5	Three-phase open/close synchronism	ms	≤2
6	Average opening speed	m/s	1.2-1.6
7	Average closing speed	m/s	0.6-1.0
8	Resistance of the main circuit	μΩ	≤200

Table 3 – Main Technical Data of Dis-connector

No.	Name		Unit	Parameter
1	Rated voltage		kV	36
2	Rated current		A	630
3	Frequency		Hz	50/60
4	Short-time withstand current (4s)		kA	12.5
5	Rated peak withstand current		kA	31.5
6	1min power frequency withstand voltage	Across open contacts	kV	70
7	Circuit resistance		μΩ	≤120
8	Center deviation value of three-phase insulating closing		mm	≤2
9	Synchronism deviation value of three-phase insulator open/close			≤2
10	Insulating distance between conductor to earth			≥300
11	Contact travel			≥260

Table 4 – Operating Mechanism Characteristics

No.	Name	Unit	Parameter	No.
1	Opening coil	DC24	7	Reliable tripping under 65%-120% rated voltage, no tripping less than 30% rated voltage
		DC110	5
		AC220	3.5
		DC220	1.8
2	Closing coil	DC24	7	Reliable tripping under65%-120% rated voltage
		AC220	3.5
		DC220	1.8
3	Overcurrent tripping coil		8
4	Energy charging motor	Rated voltage: DC/AC220V Rated power: 40W		Reliable tripping under85%-110% rated voltage
5	Closing spring charging time	≤10s