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Home > Products > Circuit Breaker > Zn85-40.5 Truck Type High-Voltage Vmd Vcb

Zn85-40.5 Truck Type High-Voltage Vmd Vcb

Basic Info

Model No.:  VMD

Product Description

Model NO.: VMD

Operation: Manual and Electric Type Circuit Breaker

Arc-extinguishing Medium: Vacuum

Structure: Vcb

Type: Circuit Breaker

Certification: ISO9001-2000, CCC, Ohsas 180001

Rated Current: 630A Circuit Breaker

Lightning Impulse Withstand Voltage: 185kv Circuit Breaker

Rated Peak Withstand Current: 50/63/80ka Circuit Breaker

Specification: ISO9001/OHSAS/OHSMS 18001

HS Code: 8535210000

Breaking Capacity: High and Medium Voltage Circuit Breaker

Speed: Normal Type Circuit Breaker

Installation: Fixed or Handcart Type Circuit Breaker

Poles Number: 3

Function: Overcurrent Protection

Rated Voltage: 40.5kv Circuit Breaker

1 Min Power Frequency Withstand Voltage: 95kv Circuit Breaker

Rated Short-Time Withstand Current: 20/25ka Circuit Breaker

Trademark: Mingde Circuit Breaker

Origin: Cixi, Ningbo Circuit Breaker

ZN85-40.5 Truck Type High-voltage Vmd VCB

Zn85-40.5 Truck Type High-Voltage Vmd Vcb

1. General Rules

VMD5 series vacuum breaker is of indoor High Voltage Switchgear suitable for 40.5kV.

Three-phase power system with 50Hz frequency in order to protect and control electrical

Appliances, and especially suitable for frequent operation at rated current or incessant

Open circuit due to unique advantages of Vacuum Circuit Breaker.

VMD5 series vacuum breaker can be used independently, and also can be applied in

Central switch cabinet, fixed switch cabinet, and oilless reconstruction, as well as

Realize complete interchangeability with foreign like products.


VMD5-40.5/1250-31.5 refers to VMD type indoor high voltage vacuum breaker,

With main technical parameters: 40.5kV voltage, 1250A rated current, and 31.5kA

Rated short-circuit breaking current.

2. Operating Environment Condition

2-1 Normal Operating Environment Condition

Altitude: 1000m and below 1000m area

Environment temperature:

Highest temperature: +40ºC

Daily mean no larger than: +30ºC

Lowest temperature: -15ºC

Environment humidity:

Daily average relative humidity: 95%

Monthly average relative humidity: 90%

Daily average saturated vapor pressure: ≤2.2×10-3MPa

Monthly average saturated vapor pressure: ≤1.8×10-3MPa

Earthquake intensity: No more than 8 degree

The product shall be away from weep, fire and explosion, chemical

Corrosion and strenuous vibration place.

2-2 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.

3. Main Specifications and Technical Parameters

NO Item Unit Technical data
1 Rated voltage KV 40.5
2 Rated insulating level Rated short time power
Frequency withstand
(1 min)
Rated lighting impulse withstand voltage 185
3 Rated Frequency Hz 50/60
4 Rated current A 630 630 1250
1250 1250 1600
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 4S rated short-time withstand current 20 25 31.5
9 Rated peak value of current 50 63 80
10 Rated short-circuit making current(peak value) 50 63 80
11 Duration of rated short-circuit current S 4
12 Mechanical endurance Times 10000, 30000, 60000
13 Rated making surge current
Of capacitor
KA 12.5
(The frequency is less than 1000Hz)
14 Rated breaking current of single/symmetrical
Capacitor bank
A 630, 400
15 Breaking times at rated short-circuit current Times 20
16 Power frequency withstand voltage
Of secondary circuit
V 2000
17 Rated operating voltage AC110/220 DC110/220
18 Rated operating order O-0.3S-CO-180S-CO
19 Energy storage times S <=15
20 Clearance mm 202
21 Travel 61
22 Pole distance 3001.5
23 Bounce time(making) Ms <=3
24 Three pole making/breaking non simultaneity <=2
25 Average breaking time M/s 1.5~1.9
26 Average making time 0.6~1.3
27 Making time Ms 30-80
28 Breaking time 20-45
29 Contact pumping(breaking) mm <=3

4. Packaging, Transportation and Storage Precautions

(1) Circuit breaker should be in the state of opening and energy storage spring in a state without energy storage when packing. It should be in the state of opening and energy storage spring in a state without energy storage when packing. And it should be fixed on the bottom of the wooden case, should have waterproof measures and complete package labels.

(2) Circuit breakers can't invert and avoid strong vibration, rain, surface damage, and components lost when transportation.

(3) When loading the circuit breaker, we suggest the following tools: Crane, forklift and driving. When lifting the circuit breaker, we should not hook on the body or pole of the circuit breaker, but on the lifting hole which has the lifting mark.

(4) When circuit breaker has a long-term storage, it should be in a state of opening and energy storage spring in a state without energy storage and placed in dry ventilated indoor preventing from moisture, vibration control and harmful gas erosion, and regularly checked whether environment meets the requirements.

(5)When first use products after long-term storage, it need to have a power frequency withstand voltage Insulation testing.

Zn85-40.5 Truck Type High-Voltage Vmd Vcb

5. Certifications

Zn85-40.5 Truck Type High-Voltage Vmd Vcb

Contact us if you need more details on Circuit Breaker. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Vacuum Circuit Breaker、Breaker. If these products fail to match your need, please contact us and we would like to provide relevant information.

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