ESP100 offers proven motor protection... at no extra cost. Hundreds of thousands of motors are now fully protected by ESP100, the first starter to combine the rugged reliability of a NEMA contactor with the cost saving performance of a heater-less solid state overload. ESP100 trips within three seconds on loss of phase. That's true phase loss protection that is not merely "sensitive" to phase loss, but trips in three seconds or less - well before any possibility of motor damage, but long enough to prevent nuisance tripping if phase loss is just momentary.

Why is this protection so important?

In the event of branch phase loss, the response times of conventional thermal overload relays are slow when compared to ESP100.  It simply takes too long for these mechanical devices to detect a phase loss and react.  Seconds become minutes, as your motor's windings overheat and begin to breakdown...as your motor repair costs begin to mount.

2:1 FLA adjustment range; 4:1 below 10 amps.

A single ESP100 solid-state overload, with its 2:1 FLA adjustment range, replaces at least six sets of heaters.  That's how many heater sizes you would need to have to cover the same range as an ESP100 overload.  And for ESP100 sizes below 10 amps, FLA adjustment range is an even higher 4:1!

±2% repeat ripping accuracy.

The solid-state overload has a repeat tripping accuracy of ±2%.  Under the same conditions the trip time will be the same, within ±2% every time.  That's because each overload is individually calibrated to maintain superior protection.  Optimum overload trip curves have been designed into ESP100 by motor protection specialists.  No complex settings or field adjustments are needed.

Labor-saving installation.

Just mount it, wire it, and dial in the FLA, ESP100 comes with a universal mounting plate enabling direct replacement of most NEMA starters, sizes 0 to 1.

Exclusive "half sizes".

Choose from the broadest lineup of general purpose starters available - including Furnas/Siemens exclusive "half sizes" all fully tested to NEMA standards.