ABB REL650 series, Commissioning Manual

Page: 117 / 208

-3U
0
=U
ref
Operate area
Instrument
transformer
angle error
3I
0
(prim)
3I
0
(to prot)

Characteristic after
angle compensation
RCAcomp
IEC06000651-3-en.vsd
RCADir = 0º
IEC06000651 V3 EN-US
Figure 19: Explanation of RCAcomp
Operation mode 3I
0
· 3U
0
· cos φ
SEMOD175060-76 v8
1. Set the polarizing voltage to 1.2 · UNRel> 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 operate
power is equal to the
SN> setting for the set directional element.
Note that for operation, both the injected current and voltage must be greater
than the set values
INRel> and UNRel> respectively.
The function activates the START and STDIRIN outputs.
3. Assume that φ´ is the phase angle between injected voltage (3U
0
) and current
(3I
0
) i.e. φ´ = RCADir -φ. Change φ´ to for example 45 degrees. Increase the
injected current until the function operates.
4. Compare the result with the set value and make sure that the new injected 3I
0
· 3U
0
· cos φ is equal to the setting SN> . Take the set characteristic into
consideration, see figure 18 and figure 19 .
1MRK 506 383-UEN A
Section 9
Testing functionality by secondary injection
Line distance protection REL650 2.2 IEC 111
Commissioning manual