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Load Switch MFN5-12

Load Switch MFN5-12

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Description

 

The MFN5-12 load switch is a three-phase load switch for indoor installation, which enables switching on and off under load (without damage) sections of a three-phase alternating current circuit with earthed or isolated neutral during emergency conditions.

 

Rated current, A — 400, 630

Rated voltage, kV — 10

The maximum operating voltage, kV — 12.7

Rated frequency, Hz — 50

Rated short-time withstand current, kA / s — 12.5 / 4 20/2

Rated peak withstand current, kA — 31.5 / 50

Impulse voltage (peak) / ground, kV — 75/85

 

An SF6 load switch, or load break switch (LBS), utilizes sulfur hexafluoride (SF6) gas as an insulating and arc-quenching medium. Being colorless, odorless, and non-toxic, SF6 offers outstanding dielectric strength, making it a popular choice for high-voltage switching applications.

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Parameters

 

Operating Conditions of MFN5-12

  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

 

Solutions and Applications of High-Voltage SF6 Load Switches:

  1. Power Distribution: SF6 load switches are widely used in medium to high voltage power distribution systems to safely disconnect sections of the electrical grid during both normal and fault conditions.
  2. Transformer Substations: In substations, these switches protect transformers by disconnecting them during overload conditions or for routine maintenance.
  3. Ring Main Units (RMUs): Common in urban power grids, RMUs use SF6 load switches to ensure continuity of supply and protection against faults.
  4. Industrial Plants: In heavy industries, where electrical loads are significant, these switches help manage and protect large motors, generators, and transformers.
  5. Wind and Solar Farms: Renewable energy generation systems require reliable switches to protect and manage their connections to the grid. SF6 load switches fit the bill due to their reliability and efficiency.
  6. Rail Systems and Infrastructure: For electrified rail systems, SF6 switches help manage and protect the overhead catenary systems and ensure safe and efficient operations.
  7. Mining Operations: The demanding conditions of mining environments make the ruggedness and reliability of SF6 switches invaluable for ensuring electrical system safety.
  8. Capacitor Bank Switching: In power compensation systems, SF6 load switches assist in the safe and efficient switching of capacitor banks, ensuring power quality and system stability.

 

Overall dimensions of MFN5-12

MFN5-12

 

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