Medium Voltage Vacuum Contactor

EVC8C series AC medium-voltage vacuum contactor are suitable for remote connection and disconnection, as well as frequent starting and control of AC motors, transformers, capacitor banks, and other devices in power networks with rated voltages of 12 kV and 7.2 kV, and rated currents ranging from 160A to 800A.

Environmental Conditions:
1) Ambient temperature: -25°C to 40°C.
2) Installation location altitude: Not exceeding 2000m.
3) Relative humidity of the air: The maximum average relative humidity of the wettest month is 90%, with a minimum average temperature of 25°C, considering condensation occurring on the product surface due to temperature changes.
4) Environment: Suitable for use in locations without water ingress, corrosive or flammable gases, and severe vibrations.

Usage Requirements:
1) Correctly select the technical parameters of the contactor, including ensuring that auxiliary switch contacts are not overloaded.
2) Sufficient insulation space should be maintained around and above the contactor to ensure safe operation.
3) If there is no response when the control power supply is turned on, immediately disconnect the control power supply and check the cause to avoid burning out the electromagnetic coil.
4) When the contactor is used to control inductive loads, it is recommended to use overvoltage protection devices such as R-C filters or varistors to protect the load.
5) The electromagnetic system generates strong magnetic attraction during operation, so care should be taken to prevent ferromagnetic materials from being drawn into the contactor.
6) Contactors are not suitable for series and parallel operation.
7) The connection principle of the main circuit is as follows: The upper end (static end) is the incoming line, and the lower end (dynamic end) is the outgoing line.

Product Specifications:
Rated voltages: 12 kV (10 kV), 7.2 kV (6 kV)
Rated currents: 160A, 250A, 400A, 630A, 800A

Technical Parameters:
1) Number of poles in the main circuit: Three.
2) Control power supply voltage: AC or DC, customizable to 110V, 220V, or 380V according to user requirements.
3) The rated heating current of the auxiliary switch contacts is specified as 5A.
4) Rated duty cycle: Intermittent long-term duty cycle, repetitive short-time duty cycle (rated on-time ratio is 40%).
5) The contactor requires a minimum closing holding power of ≥800VA and a holding power of ≥50VA.

Note: Parameters in parentheses are for 7.2 kV