Easy Setup
DIP switch adjustments allow for precise device configuration. The Full Load Current setting is adjustable in one ampere increments. Trip Class selection is adjustable in increments of 2 with an adjustment range of 2…30, allowing optimal utilization for a wide variety of motor and application types (submersible pumps, hermetically sealed refrigeration compressors, rock crushers).

Useful Diagnostics
Up to four LEDs provide device status indication in addition to trip identification, allowing maintenance personnel to react quickly in order to minimize production downtime.

• Green LED that indicates the device is powered and operational
• Red LED that identifies an overload trip with steady illumination and flashes when motor current exceeds 110% of the set FLA
• Red LED that identifies a phase loss or current imbalance trip condition
• Red LED with the 193-EF2 product that indicates a thermistor overtemperature trip

Enhanced Protection
Phase Loss and Current Imbalance Detection – In the event of phase loss, the 193-EF overload relay trips immediately, independent of motor load, and protects the motor from hazardous motor temperature rise. The 193-EF overload relay is sensitive to current imbalance at a level of 40% or greater with a 1.5 second trip delay on start-up and a three second trip delay during normal run.

Thermistor Monitoring – The 193-EF2 overload relay provides additional circuitry for monitoring motor winding-embedded thermistors. This allows the device to detect motor overheating in cases where it cannot be detected by monitoring current alone (blocked ventilation and high ambient temperature). The circuitry also monitors for open and short-circuit sensor leads

Convenient Options
For added application flexibility, the 193-EF overload relays offer the following options:

• Automatic reset
• Remote reset module
• External indication module (193-EF2 only)