ABB Relion REG670, Technical Manual, Page: 358 / 1298

Table 166: EFPIOC Output signals
Name Type Description
TRIP BOOLEAN Trip signal
8.3.5 Settings
Table 167: EFPIOC Group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Off
On
- - Off Operation Off / On
IN>> 5 - 2500 %IB 1 200 Operate residual current level in % of
IBase
Table 168: EFPIOC Group settings (advanced)
Name Values (Range) Unit Step Default Description
StValMult 0.5 - 5.0 - 0.1 1.0 Multiplier for operate current level
Table 169: EFPIOC Non group settings (basic)
Name Values (Range) Unit Step Default Description
GlobalBaseSel 1 - 12 - 1 1 Selection of one of the Global Base Value
groups
8.3.6 Monitored data
Table 170: EFPIOC Monitored data
Name Type Values (Range) Unit Description
IN REAL - A Residual current
8.3.7 Operation principle
The sampled analog residual currents are pre-processed in a discrete Fourier filter
(DFT) block. From the fundamental frequency components of the residual current, as
well as from the sample values the equivalent RMS value is derived. This current
value is fed to the Instantaneous residual overcurrent protection (EFPIOC). In a
comparator the RMS value is compared to the set operation current value of the
function (
IN>> ). If the residual current is larger than the set operation current a signal
from the comparator is set to true. This signal will, without delay, activate the output
signal TRIP.
Section 8
1MRK502052-UEN B
Current protection
352
Technical manual