VX-12 Series Core SwitchingUnit Features

Categories: Disconnect Switch, Load Break Switch, Switching Devices, Vacuum Circuit Breaker

Description

Description

1.The core switching unit adopts solid-sealedpole design, miniaturized vacuum interrupter andnew casting process,innovative structural design.localdischarge,dynamic heat,temperature riseand life are all reliably guaranteed.
2.Circuit breaker and three-station switch are assembledas a whole,complete testing of break-in,characteristicsand insulation is completed before leaving the factory,no need for partners to repeat the test,and it isconvenient to install into the cabinet.
3.After simulation, physical testing and optimizationenhancement, the switching unit not in the box afterthe frequency withstand voltage test for less than 3pC
4.Eaton’s vacuum interrupters are available upon request.

Vacuum Switch Parameter Table

Item	Unit	Circuit breaker	Load switch
Contact opening distance	mm	9±1
Contact overtravel	mm	3±1
Average opening speed	m/s	1.4±0.3
Average closing speed	m/s	0.8±0.2
Bounce time of contact closing	ms	≤2
Three-phase closing asynchrony	ms	≤2
Three-phase switching non-synchronous	ms	≤2
Closing time	ms	30-60	≤90
Split time	ms	18~40
Center distance between phases	mm	150±1.5
Split contact rebound amplitude	mm	≤1.5
Amplitude of overshoot of tripping contact	mm	≤2
Rated contact pressure	N	1800±160	1100±100

Disconnecting and Grounding Switch Parameter Table

Item		Unit	Disconnecting switch	Grounding switch
Rated Voltage		kV	12
Rated Frequency		Hz	50
Rated current		A	630/1250	/
1min frequency withstand voltage	To Ground, Interphase	kV	42
	Between breaks	kV	48
Lightning impulse withstand voltage	To Ground, Between Phases	kV	75
	Between breaks	kV	85
Short-time withstand current and duration		kA/S	20/4 main circuit, 17.4/2 grounding circuit
Rated peak withstand current		kA	50/63
Mechanical life		time	3000
Contact pressure		N	160±20
Manual closing force		N	≤200
Manual opening force		N	≤200
Opening distance of movable and static contacts		mm	≥110	110
Phase center distance		mm	150±1.5
Ground switch closing synchronization		ms	/	≤2