VTM-12 Indoor High-Voltage AC Permanent Magnet Vacuum Circuit Breaker

1.1 Suitable for switching various loads with different properties and frequent operations in three-phase AC50Hz, 10kV power system.
1.2 For protection and control of electrical equipment used in industrial and mining, enterprises, power plant,and substation.

Overview

Working environment conditions:

1.1 The ambient air temperature does not exceed 40°C, the average measured within 24h does not exceed 35°C, and the minimum ambient air temperature is -1°C;

1.2 Altitude: Not higher than 1,000 meters;

1.3 The surrounding air is not polluted obviously by dust, smoke, corrosion or flammable gas, steam, and salt mist;

1.4 Humidity conditions: daily mean value is not greater than 95%; monthly mean value is not greater than 90%; the average of water vapor pressure is not greater than 2.2kPa; the average of the monthly water steam pressure is not greater than 1.8KPa;

1.5 Vibration or ground movement from the outside of switchgear or control equipment can be negligible;

1.6 The amplitude of the conduced electromagnetic interference in the secondary system cannot exceed 1.6kV;

1.7 Special use conditions If the altitude at the installation site exceeds 1,000 meters, or the ambient air temperature exceeds the limit specified in the normal working conditions or the installation site is highly humid to easily cause condensation, please contact our company for customization.

Rated voltage	kV	12
Rated power frequency withstand voltage		42
(1 minute)
Rated lighting impulse withstand voltage		75
(peak)
Rated frequency	Hz	50
Rated current	A	630 1250	630 1250 1600 2000 2500 3150		1250 1600 2000
					2500 3150 4000
Rated circuit-breaker breaking current	kA	20、25	31.5		40
Rated short-circuit making current (peak)		50、63	80		100
		20、25	31.5
Rated short-time withstand current					40
Rated peak withstand current		50、63	80		100
Rated short-circuit duration	S	4
Rated operating sequence		O—0.3s—CO—180s—CO		O—180s—CO—180s—CO
Rated short-circuit breaking current ON/OFF times	Times	30 (50 customized)
Mechanical life		30,000
Rated operating voltage	V	220/110
Allowable accumulative wear thickness of dynamic and static contacts	mm	3