Fullscreen
MFZRN21-12-Load-Switch

Load Switch MFZRN21-12

Category:
  • Share:
Ask a Question

Description

 

The load switch MFZRN21-12 is a three-phase combined load switch with fuses, which enables switching on and off under load (without damage) sections of the three-phase alternating current circuit, with earthed or isolated neutral, in emergency conditions.

Rated current, A — 125, 400, 630

Rated voltage, kV — 10

The maximum operating voltage, kV — 12

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

Количество просмотров 42

Parameters

 

The load switch MFZRN21-12 is a three-phase combined load switch with fuses, which enables switching on and off under load (without damage) sections of the three-phase alternating current circuit, with earthed or isolated neutral, in emergency conditions.

Rated current, A — 125, 400, 630

Rated voltage, kV — 10

The maximum operating voltage, kV — 12

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

Parameters of MFZRN21-12

Name Parameter MFZN21-12 MFZRN21-12
Rated voltage kV 12 12
Rated frequency Hz 50 50
Rated current A 630 125
Power frequency withstand voltage, 1 min kV Vacuum breakdown phase-earth 42 Insulation gap 48
Lightning impulse withstand voltage (peak) kV Vacuum breakdown phase earth 75 Insulation gap 85
Withstanding Peak Current kA 50 —
Short-time withstand current (4s) kA 20 —
Short-circuit breaking current kA — 31,5
Fuse model SDLAJ-12, SFLAJ-12, SKLAJ-12
Rated short-circuit current kA 50 80 (estimated peak value)
Auxiliary voltage rating (AC or DC) IN 220; 110 220; 110
Mechanical abrasion resistance cycle 10000 10000

 

Количество просмотров 42

Solutions

 

Solutions and Applications of High-Voltage Load Switches:

  1. Power Distribution: 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 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 MFZRN21-12

MFZRN21

Hot Tags: MFZRN21 Load Switch, China, OEM supplier, manufacturers, factory, wholesale, load break switch, SF6 switch, automation, mechanism, retrofit, switchgear

#mettz #mettzgroup #mfzrn #sf6 #LBS #switch #retrofit #12kV #10kV

Количество просмотров 42

RelatedRelated products