ABB rec670 Commissioning Manual

10.12.5.1 Measuring the operate limit
1. Set the test point (|Z| fault impedance and ZF impedance phase angle ) for a
condition that meets the requirements in table 20.
2. Subject the IED to healthy normal load conditions for at least two seconds.
3. Apply a fault condition.
Check that the distance-to-fault value displayed on the HMI complies with
equations
46, 47 and 48
p
Z
x
X1
-------
100×=
EQUATION123 V1 EN (Equation 46)
in % for two- and three-phase faults
x
3 Z
p 100
X0 2 X1
×
= ×
+ ×
EQUATION124 V1 EN (Equation 47)
in % for single-phase-to-earth faults
p
3 Z×
x
X0 2 X1 XM±×+
---------------------------------------------
100×=
EQUATION125 V1 EN (Equation 48)
in % for single-phase-to-earth faults with mutual zero sequence current.
Where:
p = the expected value of a distance to fault in percent
Z
x
= set test point on the test set
X0 = set zero-sequence reactance of a line
X1 = set positive-sequence reactance of a line
XM = set mutual zero-sequence impedance of a line
10.12.5.2 Completing the test
Continue to test another function or end the test by changing the TestMode setting to
Off. Restore connections and settings to their original values, if they were changed for
testing purposes.
10.12.6 Limit counter L4UFCNT
The Limit counter function L4UFCNT can be tested by connecting a binary input to
the counter and applying pulses to the counter. The speed of the pulses must not
exceed the cycle time of the function. Normally the counter will be tested when testing
the function that the counter is connected to, such as the trip function. When the
1MRK 511 360-UEN A Section 10
Testing functionality by secondary injection
Bay control REC670 2.1 IEC 185
Commissioning manual

ABB rec670 Specifications

General

Brand	ABB
Model	rec670
Category	Control Unit
Language	English