Indoor high-voltage vacuum circuit breakerDetailed product description：

Overview:
The VS1-12 series indoor high-voltage vacuum circuit breaker is mainly used in 12kV power systems as a protection and control unit for power equipment in power plants, substations, and industrial and mining enterprises. Suitable for frequent operating places.

Key Features:
1. The circuit breaker arranges the arc extinguishing chamber and the spring operating mechanism as a unified whole. This structural design makes the operating performance of the operating mechanism more in line with the required performance of the arc extinguishing chamber opening and closing, reduces unnecessary intermediate links, lowers energy consumption and noise, and greatly improves the operating performance of the circuit breaker.
2. The arc extinguishing chamber is a ceramic insulated shell with a large creepage distance, using copper chromium contacts, cup-shaped longitudinal magnetic structure, and large breaking capacity.
3. The primary conductive circuit of the circuit breaker is installed inside an insulation cylinder made of epoxy resin cast using APG technology, effectively preventing external factors such as external impact and polluted environment from affecting the arc extinguishing chamber.
4. The maximum rated current reaches 5000A, and the rated short-circuit breaking current reaches 50kA, which are the highest parameters in China.

Main technical parameters of VS1-12/5000-50 indoor high-voltage vacuum circuit breaker:

serial number	project	unit	Numerical value
one	rated voltage	kV	twelve
two	Power frequency withstand voltage (1min)		forty-two
three	Lightning impulse withstand voltage (peak value)		seventy-five
four	rated frequency	Hz	fifty
five	rated current	A	630, 1250, 1600, 2000, 2500, 3150, 4000, 5000
six	Rated short-circuit breaking current (effective value)	kA	twenty	twenty-five	thirty-one point five	forty	fifty
seven	Rated short-time withstand current (effective value)		twenty	twenty-five	thirty-one point five	forty	fifty
eight	Rated short-circuit current duration	S	four
nine	Rated peak withstand current (peak)	kA	fifty	sixty-three	eighty	one hundred	one hundred and twenty-five
ten	Rated short-circuit closing current (peak)		fifty	sixty-three	eighty	one hundred	one hundred and twenty-five
eleven	Rated breaking current of single/back-to-back capacitor bank	A	630/400
twelve	mechanical life	time	twenty thousand
thirteen	Rated short-circuit current breaking times		thirty			twenty
fourteen	Rated operating sequence		★			☆
★ Min-0.3 s - HeFen-180 s - HeFen ☆ Min-180s - HeFen-180 s - HeFen

Forced air cooling is required for temperatures above 4000A
Ordering Instructions:
1. Name, model, specifications, quantity, and delivery time of the circuit breaker;
2. Select the control circuit schematic and rated operating voltage;
3. Configuration scheme for overcurrent protection and closing locking components;
4. Names and quantities of spare parts and components;
5. If the user has any other requirements, they can specify them when placing an order.