NewElec’s 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 400 V or 525 V supply while the KB and KC relays require either 110 V or 220 V AC 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, undercurrent and restart timers. The units provide overload, underload, single phasing, unbalanced current, overvoltage and phase rotation protection.
Available in the range from 0,5 A to 50 A directly through the current transformer module block, the relays are also offered in the range up to 200 A using external current transformers in a xxx:5 ratio.