VTG-40.5 Indoor High-Voltage AC Vacuum Circuit Breaker

1.1 Suitable for three-phase AC 50Hz, 35kV power system for switching various loads of different natures, and for occasions with frequent operations.
1.2 For the protection and control of electrical equipment used in industrial and mining, enterprises, power plants and substations.

Overview

Working environment conditions:

4.1 The ambient air temperature does not exceed +40℃, and the mean value measured within 24h does not exceed 35℃, and the min. ambient air temperature is -15℃;

4.2 Altitude: ≤1,000 meters. 4.3 There is no obvious pollutions such as dust, smoke, corrosion or flammable gas, steam gas, or salt spray in the ambient air.

4.4 Humidity conditions: The daily mean is not greater than 95%, and the monthly mean is not greater than 90%; the mean value of water steam pressure is not greater than 2.2KPa, and the monthly mean of water steam pressure is not greater than 1.8KPa;

4.5 Vibration or earthquake from the outside of the switchgear or controlgear can be omitted;

4.6 The magnitude of the electromagnetic interference induced in the secondary system does not exceed 1.6kV.

4.7 Special working conditions If installed at the place where the altitude exceeds 1,000 meters, the ambient air temperature is out of the limit value specified by the normal working conditions or condensation may easily occur due to high humidity, please contact our company for customization.

Rated voltage	kV	40.5
Rated lightning impulse withstand voltage (peak)		185
1 minute power frequency withstand voltage		95
Rated frequency	Hz	50
Rated short-circuit breaking current	kA	25	31.5
Rated current	A	630A ~ 2500A
Rated short-time withstand current	kA	25	31.5

Rated peak withstand current		63	80
Rated short-circuit making current (peak)	kA	63	80
1 minute power frequency withstand voltage of the secondary circuit	V	2000
Rated operation sequence		O-0.3s-CO-180s-CO
Rated short circuit duration	s	4
Rated capacitor bank breaking current	A	630
Mechanical life	times	10,000
Rated short-circuit breaking current ON/OFF times		20

Allowable cumulative wear thickness of moving and fixed contacts	mm	3
Rated closing and opening operating voltage	V	AC220/110, DC220/110