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MCG3-7.2

Vacuum Contactor 3p MCG3-7.2

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Description

 

Vacuum contactor MCG3-7.2 is designed for frequent switching of electrical loads in three-phase alternating current networks with voltages up to 7,2kV at a frequency of 50-60Hz, conducting currents under normal conditions and under conditions of operating overloads.

Rated voltage, kV: 6

The greatest working voltage, kV: 7,2

Rated current, A: 160, 250, 400, 630

Number of Poles: 3 (Three Pole)

Vacuum contactors MCG3-7.2 are installed in starters, stations and control units of asynchronous motors with squirrel-cage and phase rotors, in remote control systems of drives, control transformers and capacitive batteries. Due to the lack of an electric arc, it has safety and reliability characteristics, low noise level, low maintenance design, as well as small size.

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Parameters

 

Operating conditions of MCG3-7.2:

  1. Altitude: up to 2000 m.
  2. Ambient temperature: from -45°С to +45°С.
  3. Environmental Humidity:
  • the average value of relative humidity during the day is not more than 90%;
  • the average value of relative humidity during the month is not more than 80% at a temperature of plus 25 ° C.
  1. Seismic resistance up to 8 points.
  2. Environment is not explosive, does not contain conductive dust, aggressive gases and vapors in concentrations that destroy metal and insulation.
  3. Service life of the circuit breaker 20 years.
  4. Warranty period from the date of commissioning — 2 years.
Model / Tech. parameters 160/7.2KV 250/7.2KV 400/7.2KV 630/7.2KV 800/7.2KV
Main circuit rated voltage (KV) 7.2 7.2 7.2 7.2 7.2
Main circuit rated current (A) 160 250 400 630 800
Main circuit making capacity
(A/100times)		 1600 2500 4000 6300 8000
Main circuit break-make
ability (A/25times)		 1280 2000 3200 5000 6000
Maximum break ability (A/3times) 3200 4000 4500 6300 8000
Mechanical life (times) 100 0000 100 0000 100 0000 100 0000 100 0000
Electricity life AC3 (times) 25 0000 25 0000 25 0000 25 0000 25 0000
Engineering lock life (times) 10 0000 10 0000 10 0000 10 0000 10 0000
Power-frequency withstand voltage
for main circuit (fracture) (kV)		 28 28 28 28 28
Phase-phase phase — to current withstand voltage(KV) 32 32 32 32 32
Lightning impulse withstand voltage (KV) 60 60 60 60 60
Rated operate frequency (times/h) 300 300 300 300 300
Engineering lock operate frequency (times/h) 30 30 30 30 30
Terminal pressure(N) >200 >200 >200 >200 >200
Clearance between open contacts (mm) 4±0.5 4±0.5 4±0.5 4±0.5 4±0.5
Over travel (mm) 1.8±0.5 1.8±0.5 1.8±0.5 1.8±0.5 1.8±0.5
Main circuit electric resistance(   μΩ ) ≤200 ≤200 ≤200 ≤200 ≤200
Secondary control voltage (v)  AC or DC: 110, 220, 380 or can be customized
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Solutions

 

Solutions and Applications of MCG3-7.2 High-Voltage Vacuum Contactors:

  1. Motor Control Centers (MCCs): Vacuum contactors are commonly used in motor control centers to control electric motors’ operations, ensuring they start/stop safely and efficiently.
  2. Transformer Switching: Vacuum contactors can be used for switching operations in transformers, ensuring they can be safely isolated or connected to a circuit.
  3. Power Distribution Systems: In distribution systems, they play a role in load-breaking operations, especially during fault conditions or routine switching operations.
  4. Capacitor Switching: Used in the reactive power compensation systems, they help switch capacitors in or out to ensure power quality in the system.
  5. Pumps and Compressors: For large industrial pumps and compressors, vacuum contactors offer a reliable solution for motor control, ensuring that these devices operate safely.
  6. Mining Operations: Given their robust and reliable nature, vacuum contactors find applications in the demanding environment of mining operations for controlling and protecting heavy machinery.
  7. Renewable Energy Systems: As renewable energy systems like solar and wind become more prevalent, vacuum contactors help in integrating these energy sources into the grid, ensuring they can be connected or disconnected safely.
  8. Electric Furnaces: In metallurgical processes, electric furnaces require precise control. Vacuum contactors offer a solution for managing these high-power devices.

With the increasing demand for reliable electrical systems, especially in industries undergoing rapid electrification, the role of high-voltage vacuum contactors is set to grow. Innovations are continually being made to enhance their efficiency, reduce their size, and ensure they can handle even higher capacities.

High-voltage vacuum contactors are unsung heroes in modern electrical systems. Their ability to handle significant power in a compact, safe, and reliable manner makes them indispensable in various industrial and commercial applications. As electrical systems evolve and demand grows, the importance of these robust devices will only become more pronounced.

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