NM10

NM10 Motor Protection Relay

The NM10 protection relay is ideal for protecting small and medium-sized motors on radial MT and BT networks. It can be used on lines of varying length in systems with solidly grounded or low-resistance grounded neutrals, as well as on shorter lines in systems with isolated neutrals, Petersen coils, or high-resistance grounding.

Features of the NM10 Motor Protection Relay

The Thytronic NM10 protection relay offers a comprehensive set of features to ensure the safety and reliability of motors and generators. Its standard protection and control characteristics include monitoring of under current, maximum reverse sequence current, as well as a specific thermal image function for motors and generators.

Additionally, it includes monitoring of maximum phase and residual overcurrent, the ability to lock the rotor, and management of the maximum number of starting with the possibility of inhibiting restart. The device includes functions such as management of circuit breaker failure, CT supervision, and supervision of the trip circuit. Hardware and software configuration options also offer the possibility of integrating the thermal protection function for measuring machine temperature via Pt100 thermometric probes.

FUNCTIONS

STANDARD PROTECTIVE & CONTROL ELEMENTS

Under Current - 37
Thermal Image Motor/Generator - 49MG
Phase overcurrent side H and side L - 50/51
Maximum Residual Overcurrent - 50N/51N(1)
Locked Rotor - 51LR(48)/14
Maximum number of startings (Restart inhibition) - 66
Breaker Failure - BF
CT Supervision - 74CT
Trip Circuit Supervision - 74TCS
Sequence of event Recorder (SER)
Sequence of Fault Recorder (SFR)

SW PACK OPTIONAL CONFIGURATION

Digital Fault Recorder (DFR)

HW PACK OPTIONAL CONFIGURATION

Thermal with Pt100 Probes - 26

COMMUNICATION FUNCTIONS

Modbus TCP-IP
One USB Type B local port for communication with ThyVisor setup software
Modbus protocol RTU RS485 / IEC 870-5-103 / DNP3

DOWNLOADS

NM10 Manual