ABB SACE Emax 2 Manual page 31

Neutral Protection Neutral protection is used to characterize protections L, S and I differently on the neutral phase.
T Protection T protection protects against abnormal temperatures measured and transmitted to the sensor inside the unit;
Linst protection The purpose of Iinst protection is to maintain the integrity of the circuit-breaker and installation in the case of
Harmonic distortion Harmonic distortion allows a monitoring alarm to be activated in the case of distorted waveforms; if enabled
Hardware trip protection If enabled, the protection activates if one or more disconnections of the current sensors, Rating plug, Trip coil
Current thresholds The Current thresholds allow checks to be set along the current lines, to be associated with the programmable
29 | © 2019 ABB | 1SDH001316R1002 - ECN000086501 - Rev. A
Represented as a percentage, it defines the multiplication factor applied to the tripping thresholds of the
protections (example: 50% = the tripping threshold of the neutral is half the phase threshold).
The protection is available with the 4P and 3P + N configuration; the configuration parameters can be
accessed via the Settings menu
NOTE: the Trip unit will not accept changes to the thresholds of protection L (I1) and of the
Neutral (InN) unless the following limtation is complied with: (I1 x InN) ≤ Iu; Iu is the size of
the circuit-breaker
WARNING! With 150% and 200% threshold; if the measured neutral current exceeds
16In, the Trip unit resets the protection to 100% by itself
temperature verification is always active and includes three operating states:
State Temperature range [°C]
Standard -25 < t < 70
Warnings -40 < t < -25 or 70 < t < 85
Alarm t < -40 or t > 85
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with Ekip Touch, the display remains on within range: -20°C / +70°C; with Ekip LCD, the display remains
on within range: -30°C / +80°C
All protections enabled in the unit are active in all operating states.
particularly high current values requiring shorter reaction times than those provided by I protection.
The protection is always active; the trip threshold and time are reserved and defined by ABB.
in the Measurements menu, the unit signals an alarm for peak factors exceeding 2.1.
or an alarm inside the unit are detected.
The protection activates with a TRIP if the disconnections persist for more than one second; in the case of
Trip coil disconnection, the unit merely handles alarm signaling.
contacts of the Ekip Signalling modules (in all versions).
The Advanced-Signaling menu includes two thresholds with monitoring relating to I1 (Threshold 1 I1 and
Threshold 2 I1) and two with monitoring relating to In (Threshold Iw1 and Threshold Iw2).
Ekip Touch actions
Normal operation; display state depending on type
Warning led @ 0.5 Hz; display state depending on type
Display off; Alarm and Warning leds @ 2 Hz; TRIP if Trip
enable is activated
ABB | SACE Emax 2
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Continued on the next page
Protections | 2 - Standard Protections