76LE008146B
The sentinel Energy trip unit
2.1 General description
hw+ circuit breakers equipped with the sentinel Energy electronic trip unit provide protection,
alarm, measurement, communication and remote control functions.
There are two versions of the sentinel Energy trip unit:
- Energy LSI,
- Energy LSIG.
In addition to the standard functions, oers optional functions for advance use tailored to the
needs of the electrical installation.
The availability of the optional functions depends on the type of rating plug installed.
The standard functions (grey rating plugs) are indicated in the following table.
The optional functions (black rating plugs) are indicated in the following table.
Standard functions Energy LSI Energy LSIG
Long Time Delay protection against overcurrent (L)
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Long Time Delay protection against overcurrent IEC 60255-151
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Short Time Delay protection against overcurrent (S)
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Instantaneous protection against overcurrent (I)
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Earth fault protection (G) -
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Neutral protection
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Dual settings (prole A - prole B)
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Zone Selective Interlocking (ZSI)
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Trip and overload alarms
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Optional alarms
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Protection against electronic malfunctions (HWF)
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Trip Test
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Trip history
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History of status and parameter changes
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Class 1 embedded energy meter
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Measurement of current, voltage and power
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Measurement of frequency, phase sequence and power factors
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Maintenance alarm
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Optional functions Meter Plus Harmonic Advanced Ultimate
Measurement of total harmonic distortion
THDV and THDV
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Analysis of individual harmonics -
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-
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Measurement of voltage unbalances -
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Alarm for voltage dips and swells -
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Multi-tariff energy meters
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-
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Undervoltage protection - ANSI 27 - -
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Overvoltage protection - ANSI 29 - -
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Underfrequency protection - ANSI 81L -
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Overfrequency protection - ANSI 81H - -
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Reverse active power protection - ANSI 32R - -
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Phase unbalance protection - ANSI 46 - -
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Voltage unbalance protection - ANSI 47 - -
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