VEF-12GD Side Installation Type 3 Working Position Vacuum Circuit Breaker

Short Description:

Integrated, side installation, with disconnect switch, with earth switch (upper/lower earthing), interlocking mechanism integrated miniaturized
● 12KV, 630~1250A, 20~31.5KA
● For cabinet width 500mm
● Patented technology
● Solid sealing technology
● Outgoing terminal with non-contact charged display sensor
● The cabinet door block adjustment free

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Product Detail

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Description

◆ Type description

◆ Use environment
Normal use environment
● Ambient temperature: -15~40℃, daily average temperature ≤+35℃;
● Humidity: The average value of relative humidity measured within 24 hours is ≤95%; the average value of
water vapor pressure measured within 24 hours is ≤2.2kpa; the average value of relative humidity is <90%; the average value of monthly water vapor pressure is <1.5 kpa;
● Altitude ≤1000m;
● Sunlight radiation can be ignored;
● Vibration from outside the switchgear and control equipment can be ignored;
● The surrounding air is not significantly polluted by dust, smoke, corrosive or flammable gas, steam or smoke.

◆ Structure
The main circuit of VEF-12GD series side installation type 3 working position vacuum circuit breaker is arranged longitudinally. The upper part is the disconnect switch, the middle part is the vacuum circuit breaker, and the lower part is the earth switch. The operating mechanism, the circuit breaker mechanism and the interlocking mechanism are located in the front of the switch. The switch can be installed upside down.

Safety and excellent embedded pole
High reliability, stable insulation performance, stronger structure, miniaturization, maintenance-free, more environmentally friendly, and high mechanical resistance.
Visual disconnect open contacts
Rotary disconnect switch with visible disconnect open contacts after opening.
Modular operating mechanism
The circuit breaker adopts a modular operating mechanism, which can be replaced or overhauled independently, and has good interchangeability. It can be operated manually, or can be operated by AC or DC energy storage to realize remote control.
Three-shafts step-by-step operation, reliable mechanical interlocking
The disconnect switch, circuit breaker, and earth switch are operated on a single shaft respectively, and there is a forced mechanical interlock between the 3 shafts to prevent misoperation.
Outgoing wire end with non-contact charged display sensor
No capacitance, using non-contact induction technology, safe and reliable.
The cabinet door and the earth switch are designed with a reliable interlocking structure
To ensure the safety of the operator, the adjustment-free cabinet door with cabinet door block.

◆ Main technical parameters

NO.	Items	Unit	Parameters
1	Rated voltage	kV	12
2	(1min) rated short time power frequency withstand voltage: phase-to-phase, across open contacts		42/48
3	Rated lightning impulse withstand voltage (peak): phase-to-phase, across open contacts		75/85
4	Primary circuit power frequency withstand voltage (1min)	V	2000
5	Rated frequency	Hz	50
6	Rated current	A	630, 1250
7	Rated short circuit breaking current	kA	20	25	31.5
8	Rated peak withstand current	kA	50	63	80
9	Rated short circuit making current	kA	50	63	80
10	4S rated short time withstand current	KA	20	25	31.5
11	Rated short time withstand current duration	S	4
12	Rated single/back-to-back capacitor bank breaking current	A	630/400
13	Rated capacitor bank making inrush current	kA	12.5(frequency ≤1000Hz)
14	Rated short circuit current breaking number	times	30
15	Mechanical life (disconnect switch/circuit breaker/earth switch)		3000/10000/3000
16	Allowable cumulative wear thickness of moving and fixed contact	mm	3
17	Rated closing operating voltage	V	AC24/48/110/220, DC24/48/110/220
18	Rated opening operating voltage
19	Rated voltage of motor
20	Rated power of motor	W	70
21	Charging time	S	<15
22	Clearance between open contacts	mm	9±1
23	Overtravel	mm	3.5±1
24	Contacts closing bounce time	ms	<2
25	Three phase opening and closing asynchronism		<2
26	Opening time (rated voltage)		<40
27	Closing time (rated voltage)		<60
28	Average opening speed (contacts just opened~6mm)	m/s	0.9-13
29	Average closing speed (6mm~contacts just closed)	m/s	0.5-11
30	Contacts opening rebound amplitude	mm	<2
31	Contacts closing contact pressure	N	2400±200( 20-25kA) 3100±200(31.5kA)
32	Rated operating sequence		O-03S-CO-180S-CO