3-in-1 Circuit Breaker TYD-12GD,Indoor Switch-3-in-1 Circuit Breaker TYD-12GD-Wenzhou Tuyuan Electric Co.,Ltd

The TY4-40.5 indoor vacuum circuit breaker is a new generation of three-phase AC 50/60Hz, rated voltage 40.5kV indoor switching equipment developed based on a unique design concept and market demands. It provides control and protection for electrical equipment in industrial and mining enterprises, power plants, and substations, and is suitable for applications requiring frequent operations.

No.	Item		Units	Data
1	Rated voltage		kV	40.5
2	Rated insulation level	1-min PF withstand voltage	kV	95
		Lightning impulse withstand voltage	kV	185
3	Rated frequency		Hz	50/60
4	Rated current		A	1250	1600	2000	2500
5	4s Rated short time withstand current		kA	25/31.5
6	Rated peak withstand current		kA	63		80
7	Rated short-circuit breaking current		kA	25		31.5
8	Rated short-circuit making current		kA	63		80
9	Rated operating sequence			O-0.3S-CO-180S-CO
10	Number of rated short-circuit breaking current operations		times	20
11	Rated capacitor bank breaking current		A	630
12	Mechanical life		times	10000

No.	Item	Units	Data
1	Contact gap	mm	18±1
2	Contact travel	mm	5±1
3	Average closing speed	m/s	0.8±0.2
4	Average opening speed	m/s	1.8±0.2
5	Opening time (at rated voltage)	ms	≤50
6	Closing time (at rated voltage)	ms	≤100
7	Contact closing bounce time	ms	≤3
8	Three-phase closing asynchrony	ms	≤2
9	Permissible cumulative wear thickness of moving and stationary contacts	mm	3
10	Main circuit resistance	μΩ	60

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