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40.5 Kv -2500A Vmd vacuum circuit breaker



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 reconstruc-tion, as well as realize complete interchangeability with foreign like products.
 
Example:

        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
voltage(1 min)		 95
Rated lighting impulse withstand voltage 185
3 Rated Frequency Hz 50/60
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 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
 
Certifications


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.




 

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