Selectric SRP-MJ-EXW6A5AACA engine protection relay

Selectric SRP-MJ is a multifunctional microprocessor-based device for comprehensive protection, control, measurement, and monitoring of low-voltage electric motors in a single compact housing.

The device combines the functions of relay protection, motor start control, measurement of electrical parameters, registration of emergency events, and data transmission to the process control system.

SRP-MJ is designed for use in motor control cabinets (MCC), switchgear, and industrial process installations.

The device allows implementing various motor control schemes:

• direct start;
• reversible start;
• two‑speed start;
• star‑delta start;
• start via autotransformer;
• control via soft‑start device;
• integration with a frequency converter;
• control of auxiliary motors;
• automatic restart;
• restarting after a voltage drop;
• sequential startup of a group of motors.

A wide range of protections is available, covering all possible emergency events.

The device is equipped with a programmable logic controller.

Available:

• more than 40 logical functions;
• creation of custom algorithms;
• setting up interlocks;
• automation of technological processes;

Integration readiness:

• RS-485 Modbus RTU;
• PROFIBUS DP;
• Type-C service port;

Operational convenience:

• color status indication;
• SOE event log;
• alarm oscillography;
• registration of recent emergency shutdowns;
• configuration via the included LCD screen without taking the equipment out of service.

Retrofitting of existing systems.
SRP-MJ can be used to upgrade existing motor control systems without completely replacing the control cabinet.

The device is an effective replacement for such systems as:

• Siemens Simocode Pro;
• Schneider Electric TeSys T;
• ABB M101;
• ABB M102;
• other intelligent motor protection relays.