Next-generation HVC series can reliably switch off continuous DC currents

TDK Corporation offers the HVC27 (B88269X*), its new generation of HVCs that can safely and reliably switch off continuous DC currents of 300A to 500A and operating DC voltages of up to 1000V in lithium-ion batteries in 20ms or less, depending on the type. This is made possible by the gas-filled ceramic arc chamber, also used in the other HVC types from TDK. Completely new is the optional Hall-effect sensor for the auxiliary contact. It is used to detect the switching state of the main contacts. The bidirectional design allows only one HVC27 to charge and discharge batteries, power motor drive systems, and do regenerative braking (recuperation).

There are three mechanical versions of the UL-certified series: an upright version (C1) with dimensions of 95mm x 44mm x 90mm (L x W x H) and a horizontal version (C5) with 90mm x 90mm x 46mm, as well as a third version as a replacement type (NIL) for the HVC25 (HVC200, 300 and 500). The high-current contactors are available with single or double coil, with working voltages of 12V or 24V. The single-coil version requires 6W in continuous operation, and the dual-coil version only 4W. The service life for resistive opening (450V/300A) is specified with 1500 operations for the single-coil version and 2000 operations for the dual-coil version. At 750V/300A, these values are 150 and 1000 opening cycles, respectively.

High-voltage contactors with high continuous current carrying capacity are used, for example, in EVs for fast disconnection of the lithium-ion battery, in DC charging stations, and in stationary battery storage systems such as storage for photovoltaic or UPS systems.