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Outdoor Vacuum Circuit Breakers MZW32-12T

Outdoor Vacuum Circuit Breakers MZW32-12T

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Description

 

Rated voltage, kV: 10
The greatest working voltage, kV: 12
Rated current, A: 630, 1250

Vacuum circuit breakers MZW32-12T are three-phase high-voltage vacuum circuit breakers for outdoor installation, designed for switching electrical circuits under normal and emergency conditions in three-phase alternating current networks with a frequency of 50 Hz with a rated voltage of up to 10 kV. Execution options: in the painted steel or in the stainless case.

It is used for switching three-phase electrical circuits with a rated voltage of 10 kV, as well as for automatically disconnecting these circuits during short circuits and overloads. It is also widely used as a safety and control device in traction substations, industrial and mining enterprises, in urban and rural distribution networks.

MZW32-12T outdoor high-voltage alternating-current vacuum circuit breaker is produced in line with the following standards and codes:

  • IEC 62271-100 High-voltage switchgear and control gear
  • GB/T 11022-2011 Common specifications for high-voltage switchgear and control gear standards
  • GB 1984 High-voltage alternating-current circuit breakers
  • GB 311.1 Insulation co-ordination for high voltage transmission and distribution equipment
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Parameters

 

Model NO. MZW32-12T
Poles Number 3
Type Circuit Breaker
Function Conventional Circuit Breaker
Certification ISO9001-2000, CE, CCC
Rated Short Circuit Duration 4s
Mechanical Life 10,000 times
Clearance Between Open Contacts 8-10mm
Contact Over Travel 1.5-2.5mm
Weight 125 kgs

 

Operating conditions of MZW32-12T:

  1. Altitude: up to 1000 m.
  2. Ambient temperature: from -45° С to + 45° С.
  3. Humidity: the average value of relative humidity during the day is not more than 95%; the average value of relative humidity during the month is not more than 90%.
  4. Seismic resistance up to 8 points.
  5. The environment is not explosive, does not contain dust, aggressive gases and vapors in concentrations that destroy metal and insulation.
  6. Service life of the circuit breaker 25 years.

Dimensions:

MZW32-12T-1

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Solutions

 

The advantages of MZW32-12T vacuum circuit breaker are as follows:

  1. The shell is made of high-quality stainless steel with good corrosion resistance.
  2. The insulation part adopts epoxy resin and silicone rubber insulation material, which has high insulation level and strong anti-pollution ability.
  3. The operating mechanism is divided into two types: manual and electric. You can also install a remote control controller according to your own needs. .
  4. The current transformer is made of high-quality magnetic conductive material and epoxy resin and silicone rubber load insulation, which has the advantages of large capacity, high precision level, maintenance-free, and high reliability.

 

The function of  MZW32-12T vacuum circuit breaker as an electrical switch :

  1. Close accurately
  2. The switch is reliably maintained in the closed position
  3. Accurately break the switch
  4. The switch is reliably kept in the breaking position
  5. Correctly execute the operation procedure and issue switching signals (including indication signals, control signals and interlock signals).

In the structural analysis of the ZW32-12T vacuum circuit breaker, the frame can be divided into the following units according to the functional structure modules.

 

1. Energy storage mechanism unit

The unit completes energy storage → closing preparation.

The closing power of MZW32-12T vacuum circuit breaker generally does not exceed two aspects: energy storage spring or DC electromagnetic mechanism. Since the spring-operated mechanism enables the best matching of energy transfer and enables the same operating mechanism to be used for various circuit breakers with different breaking current specifications (only different energy storage springs need to be selected), it has the best cost performance ratio. Therefore, the more advanced circuit breakers are almost all spring-operated mechanism.

 

2. Drive mechanism unit

The function of this unit is to close → close hold (lock) → close action; open → trip → open action.

Drive mechanism unit is mainly composed of four-rod mechanism or five-rod mechanism.

 

3. Main drive unit

The main drive unit mainly includes the main drive shaft of circuit breaker, insulated push rod, adjusting head, connecting plate, etc. It is the bridge between the vacuum interrupter chamber operating mechanism and the dynamic guide column.

 

4. Auxiliary unit

Such as switch buttons, switch status indication, auxiliary switches, terminal blocks and the necessary interlocking devices for circuit breakers, etc. It should be noted that the above functional units are not completely separate, but relatively independent, such as interlocking devices.

 

Controllers:

We have multiple controllers for different users and different power distribution networks:

MZW32-12T-2

Communication ports: RS232/485，GPRS ，GMC，optical fiber with Communication protocols: DL/T634-1997 (IEC 60870-5-101 Transmission Protocols).

MZW32-12T-3

 

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