ABB REG670 Commissioning Manual page 203

1MRK 502 073-UUS A
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Commissioning manual
Instrument
transformer
angle error
ANSI06000651 V2 EN-US
Figure 56: Explanation of RCAcomp
Operation mode 3I
0
1. Set the polarizing voltage to 1.2 · VNRelPU and set the phase angle between
voltage and current to the set characteristic angle (RCADir). Note that the current
lagging the voltage.
2. Inject current until the function picks up, and make sure that the trip power is
equal to the SN_PU setting for the set directional element.
Note that for pick-up, both the injected current and voltage must be greater than
the set values INRelPU and VNRelPU respectively.
Testing functionality by secondary injection

RCAcomp
3I (to prot)
3I (prim)
0
0
· 3V · cos φ
0
Section 13
RCADir = 0º
Trip area
-3V =V
0 ref
Characteristic after
angle compensation
ANSI06000651-2-en.vsd
SEMOD175060-76 v8
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