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High Voltage Relay Selection Guide: kV, A and Topology
Rated voltage (kV), continuous/inrush current, contact topology and coil type are the core criteria for HV relay selection.
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Getting Started
High voltage (HV) relays are used in EV charging, energy storage, test equipment and rail systems where kV-level switching is required.
Key Parameters
- Rated Voltage (kV): Continuous operating voltage; leave margin for transients.
- Rated Current (A): Continuous, breaking and inrush currents must be evaluated separately.
- Contact Topology: SPST-NO/NC, SPDT, DPDT, latching options.
- Coil Type: Economizer-driven coils reduce power consumption.