ABB Sace Emax 2 Installation, Operation And Maintenance Instructions page 38

Neutral and frequency Adjusting of the neutral setting is used to customize the L, S and I protections on the Neutral pole with a
Additional protections The Ekip T&P module, and the Ekip Connect software, allow you to set some protections not available via
36 | © 2022 ABB | 1SDH000999R0002 - ECN000297030
control factor different from the other phases.
NOTE: use the adjustment of the neutral setting only with four-pole or three-pole circuit-
breakers with external neutral: with three-pole circuit-breakers and neutral protection active,
the trip unit signals the absence of the current sensor.
The adjustment of the frequency is used in order to set the installation frequency (between 50 and 60 Hz).
Neutral parameters
The user can activate the protection and set the percentage for calculation of the protection thresholds.
Parameter Description
By setting the threshold dip-switches to the Off position, the protection on
Enable
the Neutral is disabled.
It establishes the multiplication factor applied to the trip thresholds of the
protections:
Threshold InN
• 50%: trip threshold of the neutral current lower than other phases.
• 100%: same trip thresholds for all poles.
• 200%: trip threshold of the neutral current higher than other phases.
Limitations
The adjustment of the Neutral threshold to value of 200 % must be performed considering the following
formula: (I1 * InN) ≤ Iu.
I1 indicates the threshold of L protection in amperes (example: In = 1000 A; I1 = 0.45 In = 450 A), InN is
the neutral threshold expressed as a multiplication factor (example: 2), Iu indicates the size of the circuit-
breaker (example: 1000 A).
WARNING! With 200% threshold and measured neutral current exceeding 16In, the Trip
unit resets the protection to 100% by itself
dip-switch:
• Thermal Memory
• T Protection
• Prealarm threshold
• Hardware Trip
Thermal Memory
1SDH001330R1002
See the manual for details.
ABB | SACE Emax 2
Ekip Dip
3 - Protections - Introduction