KA, KB and KC Series Relays

The KA, KB and KC series of electronic motor protection and control relays are housed in a small footprint, DIN rail mount. Fixed thermal curves (Class 15 cold – Class 5 Hot) with thermal pre-loading, match the HOT and COLD stall times of the motor during operation.

The KA relay is mains powered auto-selecting 400V or 525V supply whilst the KB and KC relays require either 110V or 220V A.C. auxiliary supply.

The KA, KB and KC relays provide a single unit solution in pumping applications that traditionally would have used a combination of thermal overload, under current and restart timers. The unit provides overload, underload, single phasing, unbalanced current, over voltage and phase rotation protection.

Available in the range from 0,5A to 50A direct through the current transformer module block. Available in the range from 50A to 200A using external current transformers in xxx:5 ratio.