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NPM915 - Advanced Motor Protection IED

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NPM915 - Advanced Motor Protection IED

Multi-Function Protection

The optimal management of electrical power systems is based in particular on the reliability, availability and communication skills of protection, measurement and automation devices.

The NPM915 offers a modular motor protection and control solution for larger and more important motors requiring both current and voltage based protection functions along with complete measurements. Optional cards (I/O, communication…) are available for more comprehensive monitoring and control applications. Up to 16 RTD signals can be connected for thermal alarming and tripping.

The NPM915 communicates using various protocols including IEC 61850 substation communication standard.

Product family: 
Asynchronous Motors
ANSI code : 
50 - Instantaneous overcurrent
51 - Overcurrent
50N - Instantaneous earth fault overcurrent
51N - Earth fault overcurrent
68H - Broken conductor protection
87N - Cable-end differential protection
67 - Phase directional overcurrent
67N - Earth directional overcurrent
59 - Overvoltage
27 - Undervoltage
81O - Over frequency
81U - Under frequency
32 - Directional power
32R - Reverse active power
49M - Machine thermal overload protection
48 - Too long start
14 - Under speed
66 - Restart inhibit / frequent starts
37 - Undercurrent or underpower monitor
51M - Load jam monitor
55 - Management of the network power factor
50BF - Breaker failure with overcurrent
52BF - Breaker failure protection with position rise
60 - Fuse failure
74TC - Trip circuit supervision of the breaker
50ARC - Arc protection
86 - Latching of the output contacts
99 - Programmable functions
50H - Harmonic overcurrent instantaneous protection
51H - Harmonic overcurrent timer protection
46/46R/46L - Current unbalance / broken conductor protection
67NT - Intermittent earth fault protection
47/27P/59NP - Positive sequence under/overvoltage protection
81R - Rate of change frequency
51LR - Locked rotor
50NARC - Arc protection


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