The Schneider Sepam M20 (59622) is a numerical protection relay for medium voltage motors. It combines thermal overload protection with locked rotor, starting and unbalance protection, and can control the motor contactor directly, making it suitable for pumps, fans, compressors and conveyors supplied from MV switchgear.

Protection functions
• Thermal overload, ANSI 49RMS, with thermal capacity tracking
• Excessive starting time and locked rotor, ANSI 48/51LR/14
• Starts per hour limitation, ANSI 66
• Negative sequence / unbalance, ANSI 46
• Phase undercurrent, ANSI 37
• Phase overcurrent, ANSI 50/51
• Earth fault and sensitive earth fault, ANSI 50N/51N and 50G/51G
• Temperature monitoring, ANSI 38/49T, 8 RTD inputs (option)

Monitoring and control
• Thermal capacity used and remaining time before overload trip
• Starting current and starting time, start counter and start inhibit time
• Disturbance recording and trip context
• Circuit breaker or contactor control, ANSI 94/69 (option)
• Trip circuit supervision and switchgear diagnosis

Key specifications
• Current inputs: 3 phase plus 1 residual, 1 A or 5 A rated
• Auxiliary supply: 24–250 V DC or 110–240 V AC
• Digital I/O: up to 10 inputs and 8 outputs
• Control contacts: 8 A continuous, 240 V AC
• Signalling contacts: 2 A continuous
• Communication: Modbus RTU
• Display: backlit LCD with status LEDs
• Mounting: flush mount, panel cut-out
• Degree of protection: IP52 (front panel)
• Operating temperature: -25 to +70 °C
• Dimensions: 222 × 176 × 130 mm
• Weight: approximately 1.4 kg

Applications
Motor protection and control in MV switchgear for pumps, fans, compressors, conveyors and other medium voltage drives. This model is discontinued and is replaced by PowerLogic P5.