ABB | SACE Emax 2
Protections
2 - Standard Protections
16 | © 2023 ABB | 1SDH001316R1002 - ECN000297030
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)
Warnings -40 < t < -25 or 70 < t < 85
Warning led @ 0.5 Hz; display state depending on type
(1)
Alarm t < -40 or t > 85
Display off; Alarm and Warning leds @ 2 Hz; TRIP if
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.
Other protections
The Iinst, Harmonic distortion, Hardware trip and Current threshold protections are described in detail in
the manual 1SDH001330R1002.
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