Table of Contents
Advertisement
ABB REL 356 Current Differential Protection
V (volts)
/
Angle
Ð
°
V
=
70
0
a
Ð
°
V
=
70
-120
b
Ð
°
V
=
70
+120
c
Using the procedure described in Section 2 "Metering Mode", read the following parameters:
VAG
ÐVAG = 0
VBG
ÐVBG = -120
VCG
ÐVCG = +120
IA
ÐIA
IB
ÐIB
IC
ÐIC
Verify all metered values to be ± 5% on magnitude and ± 2 degrees on phase angle.
The metering accuracy is ±5 % or 0.1 A secondary current, whichever is the greatest. When reading off currents in
primary values, the 0.1 A step error is multiplied by the CT ratio, CTR.
Contact Input Subsystem Test
Make sure that the input voltage selection jumpers on the contact input module correspond to the desired contact
"wetting" voltage, as specified in Section 2 "Contact Input Module".
Apply the rated voltage across the terminals shown in the table below:
Description
DTT Key
STUB BUS
Diff Protection Disable
Target RESET
52b
Using procedure described in Section 2 "Contact Input Test",
verify proper response of the front panel display to contact input status changes.
5-2
I (amps) /
Angle
Ð
°
I
=
10
-45
a
Ð
°
I
=
10
-165
b
Ð
°
I
=
10
+75
c
= 70
(VOLTS)
(DEG.)
= 70
(VOLTS)
(DEG.)
= 70
(VOLTS)
(DEG.)
= 10.0
(AMPS)
= -45
(DEG.)
= 10.0
(AMPS)
= -165
(DEG.)
= 10.0
(AMPS)
= +75
(DEG.)
Terminal
Terminal
+
Block
TB5
9
TB5
11
TB5
13
TB5
7
TB5
1
TB5
3
TB5
5
HEX
-
Digit
10
1
12
2
14
4
8
8
2
10
4
20
6
40
Testing
Advertisement
Table of Contents
