TH-N Thermal Overload Relays - A Convenient and Safer System
The TH-N Series overload relay will protect a motor from burnouts caused by overload, locked rotor, or single phasing. A relay is a three pole, bi-metal, non-interchangeable heater element type (phase failure protection). Although designed as a three pase device, TH-N overload relays can be used to protect single phase motors by connecting two heaters in series to one motor leg, and connecting the thrid heater to the other motor leg.
Maintenance and Inspection
An operation indicator makes maintenance and inspection easy. Checks can be performed using manual operations.
Rated Current Can Be Set Easily
The rated current value is displayed on a dial. Simply adjust the dial to the full-load current of the motor to assure motor protection.
TH-N12(CX), TH-N18(CX), and TH-N20(CX) have finger protection as standard. They conform to DIN-VDE_0106 part 100. TH-N60, TH-N120, TH-N220 and TH-N400 are not available with finger protection.