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User’s Guide
NPM800 – NPM800R
NPM800RE
Date : 05/2013
Edition :30/01/2014
Folio : 6
Indice : g
2. Protection and operation functions
2.1 Protection functions NPM800 and NPM800R - NPM800RE
♦
ANSI 49 Thermal overload function, with inhibition of closing on load.
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Short-circuit protection, with one ANSI 50 threshold
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Earth fault protection, with one ANSI 51N threshold
♦
Minimum load protection (pump unpriming) ANSI 37
♦
Inverse over-current protection with one ANSI 46 threshold for the detection of
unbalance, loss or inversion of phase ANSI 46
♦
Too long starts ANSI 48 and locked rotor Protection ANSI 51LR
♦
ANSI 66 number of starts authorisation Function
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Load-shedding and re acceleration Function by external input
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ANSI 50BF & 50NBF, circuit breaker failure function by checking of the
disappearance of the phase current. (Configuration available only by the setting
software)
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ANSI 86, latching output contacts (Configuration available only by the setting
software)
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ANSI 74TC, trip circuit supervision (Configuration only by the setting software)
2.2 Operation functions NPM800 and NPM800R - NPM800RE
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Two setting groups
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Assignment of digital inputs
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Assignment of relay outputs
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User programmable LEDs
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Monitoring of trips and reclosings
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Help in circuit breakers maintenance: number of operations with alarm threshold
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Storage of the last 250 events
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Storage of four 52 periods disturbance recordings, according to COMTRADE
standard
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4 or 8 User configurable generic functions.
2.3 Locally available User’s functions
Locally, the following functions are available:
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Choice of language
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Setting in or out of order of the functions
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Customized identification of protection
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Setting of adjustment and primary values for the two tables
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Assignment of the inputs / outputs
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Reading of fault values
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Reading of each memorized value: measurements and counters
♦
Reset of counters
♦
Reading of events
♦
Configuration of disturbance recording and local trigger
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Configuration of Modbus® communication.