PROTECT ION TR I P UNI TS
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Depending on the need, two different accuracy levels are available for the trip unit, the Standard Precision and High Precision certified according to IEC 61557-12:
Instantaneous measurements
Standard Precision High Precision certified according to IEC 61557-12
Currents (RMS)
[A] L1, L2, L3, Ne
1% 2%
0.50% 0.50% 0.50% 0.50%
Ground fault current (RMS) Phase-to-phase voltage (RMS)
[A] Ig
[V] U12, U23, U31
0.50% 0.50%
Phase-to-neutral voltage (RMS)
[V] U1, U2, U3
Frequency
[Hz] f
0.20%
0.20%
Active power Reactive power Apparent power Power factor Active energy Reactive energy Apparent energy
[kW] P1, P2, P3, Ptot
2% 2% 2% 2% 2% 2% 2%
1% 2% 1% 1% 1% 2% 1%
[kVAR] Q1, Q2, Q3, Qtot
[KVA] S1, S2, S3, Stot
PF1, PF2, PF3, PF total
[kWh] Ep total, Ep positive, Ep negative [kVARh] Eq total, Ep positive, Ep negative
[kVAh] Es total
The lowest current value that the trip units Ekip Touch/Hi-Touch can measure is 0.004 x In
High Precision certified according to IEC 61557-12 Available only for factory assembled circuit-breakers, this accuracy is available as default on the Ekip Hi- Touch and Ekip G Hi-Touch trip units; anyway, it is always possible to have this accuracy for the other Ekip Touch trip units by adding the dedicated commercial codes upon ordering. For XT2 Ekip Touch trip units the High Precision is available in general for In ≥ 100A.
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