ABB Relion 670 Series Commissioning Manual page 146

Section 11
Testing functionality by secondary injection
Step No.
6-a
6-b
6-c
* - CT ratios of the phase currents (1000/1 A) and unbalance currents (10/1 A). The values of IB1 and IB2 are
considered as 1000 A and 10 A, respectively. The current inputs I
I
UNBˍA
To calculate IREFUNBˍA in
IREFUNB A
ANSIEQUATION19378 V1 EN-US
To calculate IUNBCLCˍA in
IUNBCLC A IUNB A IREFUNB A
ANSIEQUATION19377 V1 EN-US
Testing with 3 Unbalance Curr option
1. Set the following parameters:
•
•
•
•
140
Changes after step 5
Retain constant currents* of I
I = 1∠240° A, and I
B C
secondary at rated frequency.
Change I = 0.35∠0° A
UNBˍA
Change I = 0.45∠0° A
UNBˍA
Change I = 0.55∠0° A
UNBˍA
refers to the unbalance current inputs.
Step 5-c, use the following equation:
IA
=
_
IMEM _ A
Step 6, use the following equation:
= -
_ _
The measured unbalance current is referred with respect to its reference current. Refer
Technical manual for more information about unbalance current calculation.
Operation = ON
SCBConf = 3 unbalance curr
tDefTrip = 5.00 s; tDefAlm = 5.00 s; tDefWrn = 5.00 s
IUnbal> = 30% IB2
© 2017 - 2021 Hitachi Power Grids. All rights reserved
Expected output
WARNING TEST
= 1∠0° A, WARNING and WRNˍA signals should become HIGH
A
after the set time delay
= 1∠120° A in
IUNBˍA = 3.5 A
IUNBCLCˍA = 1.5 A which is equivalent to 15% of IBase2
ALARM TEST
ALARM and ALMˍA signals should become HIGH after
the set time delay
IUNBˍA = 4.5 A
IUNBCLCˍA = 2.5 A which is equivalent to 25% of IBase2
START and TRIP TEST
•
•
A
´
IMEMUNB A _
_
1MRK 511 403-UUS Rev. K
START and PUˍA signals should become HIGH
TRIP and TRˍA signals should become HIGH
after the set time delay, if BlockTrip is set to Trip
enabled
IUNBˍA = 5.5 A
IUNBCLCˍA = 3.5 A which is equivalent to 35% of
IBase2
, I , and I refer to the phase current inputs and
B C
GUID-C028CACA-D487-4DD1-B7CA-92219F3A41F0 v1
Bay control REC670
Commissioning manual
(Equation 27)
(Equation 28)