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MFZW32-40

Load Switch MFZW32-40.5

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Description

 

The load switch MFZW32-40.5 is a three-phase load switch of an outdoor installation (open installation) of 35 kV that provides switching on and off under load (without damage) sections of a three-phase alternating current circuit, with earthed or isolated neutral in emergency conditions.

Rated current, A — 630, 1250

Rated voltage, kV — 35

The maximum operating voltage, kV — 40.5

Rated frequency, Hz — 50

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Parameters

 

Main Technical Parameter MFZW32-40.5:

No Name Unit Value
1 Rated voltage KV 40.5
2 Rated current A 630
3 Rated frequency Hz 50
4 Rated peak withstand current KA 50
5 Rated short time withstand current KA 20
6 Rated short time withstand current duration s 4
7 Rated active load breaking current A 630
8 Rated closed loop breaking current A 630
9 Rated cable charging breaking current A 10
10 5% rated active load breWng current A 31. 5
11 Rated breaking capacLy of no-load transformer KVA 1250
12 Rated short circuit closing current KA 50
13 Major loop resistance 卩Q <95
14 1min power frequency withstand voltage(RMS) Dry test Pole-to-pole, pole-to earth KV 95
Isolating fracture 115
Wet test Pole-to-pole, pole-to earth 85
15 Lightning impulse withstandvoltage (peak) Pole-to-pole, pole-to earth KV 185
Isolating fracture 215
16 Mechanical life Times 10000

 

No Name Unit Value
17 Three-phase opening/closing asynchronism ms <15
18 Motor voltage and power V W £220 <200
19 Contact knife breaking position deviation mm <5
20 Main contact knife pressure N 420±42
21 Clearance between contact knives mm >360
22 Rated peak operating torque Nm <300

 

Operating Conditions of MFZW32-40.5

  1. Altitude: up to 1000 m.
  2. Ambient temperature: from -35°C to + 45°C.
  3. Environmental Humidity: the average value of relative humidity during the day is not more than 95%;
  4. Seismic resistance up to 8 points.
  5. Do not operate in places where the circuit breaker may be exposed to flammable gas, where there is a danger of explosion, the risk of chemical corrosion, and where the equipment is subject to strong vibration.
  6. Estimated service life — 20 years
  7. Warranty Period — 12 months

 

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Solutions

 

This load switch is composed of isolating switch, vacuum interrupter and operating mechanism and other parts. By using the principle of vacuum interrupter, with strong arcing ability, reliable performance, long service life, small volume, no explosion danger, no pollution. The product can be used in transmission and distribution system of electric power, metallurgy, mine, chemical industry and other departments as control equipment, especially suitable for frequent operation place.

MFZW32-40.5 -1

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