24kv-630A Hv Electric Vmd Fixed & Withdrawal Type Vacuum Circuit Breaker

The complete specification of VMD series vacuum circuit breaker can meet customers' different needs. It adopts the latest embedded poles and low-resistance vacuum interrupter and employs an accurate gear driving system in the place of tradidtional chain wheel driving system.

Product Details Company Profile

Description

Model NO.: VMD
Operation: Manual & Electric Type Breaker
Arc-extinguishing Medium: Vacuum
Structure: Vcb Breaker
Type: Circuit Breaker
Certification: ISO9001-2000
Rated Current: 630A Breaker
Rated Short-Time Withstand Current: 20/25/31.5A Breaker
Rated Short-Circuit Opening Current: 20/25/31.5ka Breaker
Trademark: Mingde Breaker
Specification: SGS, TUV
HS Code: 8535210000

Breaking Capacity: Middle& High Voltage Breaker
Speed: Normal Type Circuit Breaker
Installation: Fixed & Withdrawal Type Breaker
Poles Number: 3
Function: Overcurrent Protection
Rated Voltage: 24kv Breaker
Rated Frequency: 50Hz Breaker
Rated Withstand Current(Peak): 50/63/80ka Breaker
Mechanical Life: 30000times Breaker
Transport Package: Wooden Case Breaker
Origin: Cixi, Ningbo, Zhejiang Breaker

Product Overview

The complete specification of VMD series vacuum circuit breaker can meet customers' different needs. It adopts the latest embedded poles and low-resistance vacuum interrupter and employs an accurate gear driving system in the place of tradidtional chain wheel driving system. With main conductive circuit sealed in epoxy resin, the insulation performance will be more stable. VMD series circuit breaker passed Type Test Report according to GB and IEC standards and has been exported to 26 countries and regions in the world.

Main Parameters

NO	Item			Unit	Technical Data
1	Rated voltage			KV	24
2	Rated insulating level	Rated short time power frequency withstand voltage(1 min)			65
		Rated lighting impulse withstand voltage(peak value)			125
3	Rated frequency			HZ	50
4	Rated current			A	630	630	1250
					1250	1250	1600
							2000
							2500
5	Rated short circuit breaking current			KA	20	25	31.5
6	Rated short time withstand current				20	25	31.5
7	Rated peak withstand current				50	63	80
8	Rated short-circuit making current (peak value)				50	63	80
9	4S Rated short-time withstand current				20	25	31.5
10	Rated peak value of current				50	63	80
11	Rated making surge current of capacitor bank				12.5(The frequency is less than 1000Hz)
12	Rated breaking current of single/symmetrical capacitor bank				630/400(The value should be 800/400 while the current is 40KA)
13	Mechanical life			Times	10000,30000,60000
14	Duration of rated short-circuit current			s	4
15	Power frequency withstand voltage of secondary circuit			V	2000
16	Rated operational voltage		Making coil		AC110/220 DC110/220
			Breaking coil		AC110/220 DC110/220
			Energy-storage motor		AC110/220 DC110/220
17	Making time(under Rated voltage)			ms	≤60
18	Breaking time(under Rated voltage)				≤45
19	Permitted abrasion thickness of moving and fixed contacts			mm	3
20	Energy storage time			S	<=15
21	Clearance			mm	131
22	Travel				41
23	Bounce time(making)			ms	<=2
24	Three pole making/breaking non-simultaneity				<=2
25	Average breaking speed				1.1~1.7
26	Average making speed				0.6~1.1
27	Contact pumping (breaking)			mm	≤3
28	Conductance circuit resistance			μΩ	Withdrawal Style			Rated current
					≤45			630~1250A
					≤35			1600~2000A
					≤25			More than 2500A
29	Rated operating order				O-0.3s-CO-180s-CO

Normal Operating Environment Condition

a) Normal operating environment condition
Highest temperature:                  +40ºC
Lowest temperature:                   -15ºC
b) Environment humidity
Daily mean relative humidity:        ≤95%
Monthly mean relative humidity:     ≤90%
Daily mean saturated vapor pressure:   ≤2.2×10-3 MPa
Monthly mean saturated vapor pressure:  ≤1.8×10-3 MPa
c) Altitude: below 1000m area;
d) Earthquake intensity: no more than 8 degree;
e) The product shall be away from weep, fire and explosion, chemical corrosion and
strenuous vibration place.

Special Operating Condition

Please consult with manufacturer on manufacturing technology when operating environment is the climatic environment with high altitude, high humidity and great temperature change or other special environment condition