Page 31 - ACB-E1.2-E2.2-E4.2-E6.2

ABB | SACE Emax 2

Neutral Protection Neutral protection is used to characterize protections L, S and I differently on the neutral phase.
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

T Protection T protection protects against abnormal temperatures measured and transmitted to the sensor inside the
unit; temperature verification is always active and includes three operating states:

State Temperature range [°C] Ekip Touch actions
Standard -25 < t < 70 Normal operation; display state depending on type (1)
Warning led @ 0.5 Hz; display state depending on type
Warnings -40 < t < -25 or 70 < t < 85 (1)
Display off; Alarm and Warning leds @ 2 Hz; TRIP if
Alarm t < -40 or t > 85
Trip enable is activated
(1) 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.

Iinst The purpose of this protection is to maintain the integrity of the circuit-breaker and installation in the
case of particularly high current values requiring shorter reaction times than those provided by the
instantaneous short-circuit-protection.
The protection cannot be disabled, the tripping threshold and time are defined by ABB.

Harmonic distortion Harmonic distortion allows a monitoring alarm to be activated in the case of distorted waveforms; if
enabled in the Measurements menu, the unit signals an alarm for peak factors exceeding 2.1.

Hardware trip protection If enabled, the protection activates if one or more disconnections of the current sensors, Rating plug, Trip
coil 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.

Current thresholds The Current thresholds allow checks to be set along the current lines, to be associated with the
programmable 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).

Continued on the next page

29 | © 2022 ABB | 1SDH001316R1002 - ECN000232533 Protections | 2 - Standard Protections