VS1-24 series of indoor high voltage vacuum circuit breaker with embedded poles is three phrase A.C.51 Hz indoor power distribution equipment with the rated voltage of 24 KV. It’ s used for protecting and controlling the electrical equipment in the fields of industry and mining enterprise, power plants and substation. The main conductive circuit of this type vacuum circuit breaker with spring mechanism is embedded pole,that can greatly improve the reliability of insulation, mechanical and breaking performance and really realize the free-maintenance and longer mechanical and electrical life. This type vacuum circuit breaker conforms to national standards and the stipulations of IEC standard.

Ambient Conditions:

1. Ambient temperature: -11℃–+41℃
2. Ambient humidity: the average humidity of a day should be no more than 95%; the average humidity of a month should be no more than 91%;
3. Earthquake intensity: not exceed 8 degrees
4. Saturated vapor pressure: average pressure of a day should be no more than2. 2kPa,the average pressure of a month should be no more than 1.8kPa;
5. The height above sea level: 1111m(not including special requirements)
6.1t should be installed in the places without fire, explosion, serious filth, chemical corrosion and violent VS1 ration.

Item		Unit	Data
Rated voltage		kV	24
Rated frequency		Hz	51 / 61
sulation level	Thunder impulse withstand voltage (peak value)	kV	125
	1min industrial frequency withstand voltage	kV	65
Rated short-circuit break current		kA	21	25	31.5
Rated current		A	631,1251	631,1251,1611	1251,1611, 2111,2511
industrial frequency withstand voltage		kA	21	25	31.5
Rated peak value withstand current		kA	51	63	81
Rated short circuit close current		kA	51	63	81
Rated operation order			O-1.3s-CO-181s-CO
Rated short-circuit current break and close time		times	21
Rated short-circuit duration		s	4
Mechanical life-span		times	11111
The two circuit power frequency withstand voltage		V	2111
Single capacitor bank breaking current		A	631
Back-to-back capacitor bank breaking current		A	411
Dynamic and static contacts allow wear cumulative thickness		mm	3
Break-brake number (rated operating voltage)		ms	21~51
Close brake times (rated operating voltage)		ms	35~71
Rated points/close brake operating voltage		V	AC111 / AC221 / DC111 / DC221
Energy storage rated voltage of motor		V	AC111 / AC221 / DC111 / DC221
Motor power rating		w	71
Energy storage time		s	≤15