Quick Details
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
Rende Power Technology Group
With two wholly-owned holding subsidiaries of Ningbo Mingde Electrical Science&Technology Co., Ltd. And Mingde Electrical(Shanghai) Co., Ltd., Rende Power Technology Group is a high-tech enterprise that specializes in providing high-end circuit breaker technical solutions and core equipment manufacturing for the power industry.
Established in 2007, Ningbo Mingde Electrical Science&Technology Co., Ltd. is a manufacturing base of the company which is primarily responsible for the research and development, manufacturing and logistics of all the products. Situated in Cixi of Ningbo city, south bank of Hangzhou Bay Sea-Crossing Bridge, Ningbo Mingde Electrical Science&Technology Co., Ltd enjoys a beautiful natural scenery and humanistic landscape.
Located in Jiading New City, known as "One hundred meters--a forest, One thousand meters--a lake", Mingde Electrical (Shanghai) Co., Ltd. is seated at Jiading District, the future political economic and cultural center of Shanghai. Mingde Electrical (Shanghai) Co., Ltd. is mainly responsible for the external contact and the sales of all the products and for providing integrated solutions and service for the customers in power industry.
Up to now, the company has established a long-term strategic cooperation relationship with the domestic and international famous enterprises and universities and colleges, such as ABB, Schneider, Siemens, Eton, Baoguang, Xi'an Jiaotong University and Chongqing University and so on. The company is equipped with the product design and manufacturing capacity of 18000 sets of VMD high-voltage vacuum circuit breakers, 22000 sets of VMV smart vacuum circuit breakers and 6000 sets of switchgear assembly.
Leading technology, Stable property, Quality assurance, Energy Conservation and Environmental Protection--the unremitting pursuit of our company
Business Philosophy
To be a professional enterprise in electrical industry, through pragmatic work with a high sense of responsibility to the customers, employees, industry and society!
With the objective of the market demand and the criteria of customer satisfaction, we are committed to provide professional services to the electric systems. We insist on the people-oriented concept and the spirit of innovation in technology, management and marketing. Adhering to the business philosophy of quality service, our company is dedicated to providing safe and reliable products as well as quality service, to create value for employees, shareholders and customers.
