The 193-NREC1ZZ relay is an E3 replacement relay manufactured by Allen-Bradley/Rockwell Automation as part of the E3 overload relay product line. The 193-NREC1ZZ replacement relay is specially designed and intended for use with the 193-EC1-F, 193-EC1-H, 193-EC1-G, 592-EC1-F, 592-EC1-E, and the 592-EC1-G devices. The E3 overload relays, including the 193-NREC1ZZ replacement relay, are multi-functional solid-state microprocessor-based electronic overload relays that are designed to offer protection to squirrel-cage induction motors with ratings from 0.4 to 5000 Amps. The overload relays in this series are available in multiple different versions, including the EC1, EC2, EC3, EC5, E3, and E3 Plus models. The E3 overload relay must remain in its shipping container before it is installed. If the device will not be used for some time, it must be kept in a clean and dry location to maintain its warranty coverage.

The Allen-Bradley 193-NREC1ZZ replacement relay has an ambient storage temperature range of -40 to 85 degrees Celsius or -40 to 185 degrees Fahrenheit. It should be stored in an area with non-condensing relative humidity ranging from 0 to 95 percent. It is also essential to take several precautions when handling the 193-NREC1ZZ relay or any other related devices. Do not keep the device in a place where it will be exposed to a corrosive atmosphere and also do not store it in a construction area. The Bulletin 193-EC3 and E3 Plus overload relays are specially designed to offer ground fault protection when used with a separate 193-CBCT core balance ground fault sensor, which is mounted separately from the E3 Plus overload relay. The sensor must also be placed within 3 meters of the E3 plus overload relay.