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NPM955 - Motor Protection IED

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NPM955 - Motor Protection IED

Multi-Function Protection
The NPM955 motor protection device offers a modular protection and control solution for larger and more important motors that require a large I/O capacity.
 
You can add up to total 11 optional modules (I/O and other type of modules) into the device for extensive monitoring and control applications.
 
You can also connect up to 16 RTD signals for thermal alarms and trips. The NPM955 communicates using various protocols, including the IEC 61850 substation standard.
 
  • Powerful motor management with a large I/O capacity.
  • 5 thermal models (time constant accurate).
  • Soft start protection begins at 6 Hz.
  • Star-delta started motor supervision.
  • Two-speed motor protection.
  • Asynchronous and synchronous motors.
Product family: 
IEC 61850 - Protection and Control Relays
ANSI code : 
50/51 - Three phase overcurrent protection
50N/51N - Earth tank protection
67 - Phase directional overcurrent
67N - Earth directional overcurrent
32N - Directional earth fault
46/46R/46L - Current unbalance / broken conductor protection
50H/51H/68H - Harmonic overcurrent protection / inrush blocking
50BF - Breaker failure with overcurrent
52BF - Breaker failure protection with position rise
87N - Cable-end differential protection
59 - Overvoltage
27 - Undervoltage
59N - Maximum of zero sequence voltage
47/27P/59NP - Positive sequence under/overvoltage protection
81O - Over frequency
81U - Under frequency
81R - Rate of change frequency
32 - Directional power
RTD - Resistance temperature detectors
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
99 - Programmable functions
50ARC - Arc protection
50NARC - Arc protection
60 - Fuse failure
MST - Motor status monitoring
CTS - Current transformer supervision
CBW - Circuit breaker wear monitoring
THD - Current total harmonic distortion
THD - Voltage total harmonic distortion

NP950 Series

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