10kV MV Indoor Vacuum Circuit Breaker/ Permanent Magnet Mechanism Type VVS-12kV-1250A

EXVVS-12kV-1250A

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1. General description:
EXVVS-12kV/1250A type permanent magnet operating mechanism vacuum circuit breaker is a circuit breaker with quick split function developed by our company.
The vacuum circuit breaker of permanent magnet mechanism is installed indoors and air-insulated. It is used to switch open and close various power loads of different properties. It is suitable for urban power grid, rural power grid and other power grid construction and transformation projects, especially for frequent operation within the working current range and occasions with certain requirements for short-circuit breaking performance. The product absorbs advanced technologies and processes at home and abroad. It has the characteristics of intelligence, high reliability, long service life and maintenance-free. When used, it has no pollution to the surrounding environment. It is a green environmental protection product.

2. Technical parameters
Table 1 Technical parameters

Item		Unit	Data
Rated voltage		kV	12
Rated frequency		Hz	50
Rated insulation level	1min power frequency withstand voltage	kV	42/48
	Lightning impulse withstand voltage		75/85
Rated current		A	630（1000；1250）
Partial discharge value (14.4kV/1min)		pC	≤5
Rated short-time withstand current		kA	20（25；31.5）
Rated peak withstand current		kA	50（63:80）
Rated short-circuit current duration		S	4
Rated short-circuit current breaking times		times	30
Rated thermal stability time		S	4
Mechanical life		times	10000
Rated energy storage voltage		V	AC/DC: 24V;48V;110V;220V
Rated closing and opening operating voltage		V	AC/DC:24V;48V;110V;220V

Table 2 Mechanical parameters

Item	Unit	Data
Clearance between open contacts		8.5±0.3
Contact overtravel	mm	2.5±0.5
O/C asynchronous	ms	≤2
Contact closing bounce time	ms	≤2
Phase distance	mm	(150;180;200;230;250;275;300)±1.0
Closing speed	m/s	0.8±0.2
Opening speed	m/s	1.6±0.2
Closing time	ms	≤50
Opening time	ms	≤15 (Inherent time less than 5)
Controller energy storage time	s	＜5A

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