12kV High Voltage Vacuum Interrupter for Vacuum Circuit Breaker

Model NO.: TD-12/630-20 (VAC304)
Delivery: FOB
Minimum order quantity: 1 piece

Quantity:

Product Description

Basic Info.

Model NO.	TD-12/630-20(VAC304)
Poles Number	3
Certification	ISO9001-2000, CE, CCC
Power Frequency Withstand Voltage	42kV
Lightning Impulse Withstand Voltage	75kV
Mechanical Life	10,000 times
Rated Clearance Between Open Contacts	7.5~9.5mm
Rated Contact Stroke	3~4mm
Trademark	VACEM
Origin	Wenzhou, China

Vacuum interrupter for vacuum circuit breaker
TD-12/630-20(VAC304)

1.General description

Product features:

12kV series vacuum interrupter adopts a ceramic insulating shell, a middle sealing or built-in fixed shielding tube, and copper and chromium alloy contact material. Optimizations of the structure design of the cup-shaped longitudinal magnetic electrode makes the electromagnetic field distribution uniform, reasonable, and improve the stability of the breaking capacity. Special sophisticated process improves the insulation level of the product.

Application:

In order to meet the requirement of customers, VACEM introduced two series of 12kV vacuum interrupter (for air insulation, embedded insulation or need external insulation protection ) to match with relevant indoor&outdoor vacuum circuit breaker or vacuum distribution device. It is especially useful as control and protection device in the transmission and distribution electrical power grids with frequency 50Hz/60Hz, rated voltage 12kV, rated current 630A-4000A, rated short circuit breaking current 5kA-40kA.

VI is mainly applied to 12kV series RMU MV vacuum circuit breaker.
Meets or exceeds the requirement of IEC62271-100 and E2 level in GB1984-2003.

2.Main technical parameter

Specification of VI

Parameter item	Unit	Data
Rated voltage	kV	12
Rated current	A	630
Rated frequency	Hz	50/60
Rated short-time power frequency withstand voltage(1 min)	kV	42*
Rated lightning impulse withstand voltage	kV	75*
Rated short-circuit breaking current	kA	20
Rated peak withstand current	kA	50
Rated short-circuit making current	kA	50
Rated short-time withstand current	kA	20
Rated short-circuit duration	s	4
Rated single capacitor bank breaking current	A	400
Rated back to back capacitor bank breaking current	A	400
Breaking operations of rated short circuit breaking current	times	30
Mechanical life	times	10000
Contact closing force due to bellows and atmosphere	N	110±40
Force required to hold contact open at full stroke	N	200±50
Circuit resistance at lowest rated contact force	μΩ	≤25
Contact limit erosion	mm	3
Internal gas pressure	Pa	≤1.33×10-3
Weight of moving parts	kg	0.7
Storage life	year	20

45* and 75* listed in the table is the withstand voltage indicator in insulation medium,and it is 28kV and 50kV respectively in the air.

Specification required for matched switchgear

Parameter item	Unit	Data
Rated clearance between open contacts	mm	8.5±1
Average opening speed	m/s	1.1±0.2
Average closing speed	m/s	0.6±0.2
Rated contact pressure	N	2000±200
Contact bouncing duration at closing operation	ms	≤2
Closing and opening non-simultaneity of contacts	ms	≤2
Maximum rebound during opening	mm	≤2
Rated contact stroke	mm	3.5±0.5