Durakool Announces Expansion of High Voltage DC Portfolio


for Superior Isolation, Improved Reliability & Longer Service Life

Powerful HVDC Switching up to 1500VDC to Isolate High Voltage Batteries in Vehicle and Energy Systems – Reducing System Power Consumption and Improving Safety

Durakool today announced the expansion of the recently launched CHV series of ceramic HVDC contactors and of its innovative range of precharge resistors, optimally designed for battery isolation in electric vehicles (EVs), high voltage battery storage systems and switching HVDC in solar panel applications.

Focused on the non-consumer market where EVs demand higher power connections including: heavy industry, trucks, buses, construction, off-road, marine, aerospace and industrial, the initial ceramic contactor launch at the European Battery Show earlier this year proved to address an identified specific OEM need within these fields, resulting in design-in activity. OEMs and engineers requested even higher power switching devices for precharge and discharge applications. Durakool has responded by enriching its range of precharge/discharge contactors (up to 60A) and offering a complete range of compatible power resistors (up to 2800W).

“The CHV contactor’s non polarised terminals make it possible for electric vehicles to provide stand-by power back to the charger. They also enable the contactor in an EV to break high DC currents whilst using regenerative braking, resulting in longer service life and higher ‘in application’ reliability.” commented Ricardo Esquinazi, Brand Manager for Durakool. He continues: “Our HVDC contactors protect vehicles, their occupants and emergency service personnel by providing isolation of the high voltage battery from the electronic drive system upon vehicle impact and when vehicles are not in use.”

Switching high voltage DC up to 1500VDC, Durakool’s CHV series of ceramic contactors is ideal for high voltage DC battery and solar panel applications where high voltage batteries must be connected/disconnected from the load or power source. The non-polarised power terminals of CHV series contactors can be utilised to break current flowing in either direction.

The sealed ceramic arc chamber within the contactor provides superior isolation to epoxy sealed DC contactors, enabling higher DC voltages to be switched. The standard twin coil economisers reduce coil operating currents and heat emitted from the contactor coil, thus requiring less battery power to maintain the contactors in the operated position, resulting in improved reliability and helping increase the driving range for demanding electric applications for on-road and off-road, both for (rapid) charging and electric industrial operation. No additional coil back EMF suppression is required.

Electric circuitries always need a power resistor. The heavy industry trend is towards higher power, necessitating HVDC contactors and relays to manage that power in a compatible manner. Durakool now offers all these components in a coherent, powerful portfolio.

Durakool engineers continue to support and develop better switching solutions for the evolving requirements of all high-power electrical industries, particularly for professional off-grid operations, and renewable energy. These will likely require HVDCs within their high voltage electrical systems for safe and reliable operation, to comply with government body, legal and stringent safety regulations, such as International Electrotechnical Commission (IEC) standards. In addition, most parts feature UL approval. The production process for Durakool’s ceramic contactors is easily automated for continuous, rather than batch production, resulting in cost savings for higher volumes and even more reliable contactors.

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