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6.3 MEASURING UNIT TESTS
6.3 MEASURING UNIT TESTS
The A1 contact will chatter when the unit under test is near its threshold. Do not allow this to continue!
Remove the test current. A single contact closure is enough to determine that the unit has picked up.
CAUTION
At the start of each test is an area to record your specific setting for the function under test.
1.
Protection Settings:
CURSUPVISN
(501)
IT_PICKUP = [_________] amps,
where I
is set as follows: I
T
The test current, I
2.
Connect the relay as shown in Figure 4–3: PHASE TO GROUND TEST CONNECTIONS on page 4–12.
3.
Set the relay into test mode 34 (IT Detector). The LUI display contains: IT DETECTOR ON
4.
Set the level of I
op
to I
– 0.1 = [_________] amps rms; the A1 contact should open.
T
5.
Reduce I
to zero.
op
1.
Protection Settings:
Z2DISTANCE
(205)
Z2GRDCHAR = GDOC
CURSUPVISN
6
(502)
IB_PICKUP = [_________] amps
SCHEME
(1201)
PICKSCHEME = BLOCK
where I
is set as follows:
T
The test current, I
2.
Connect the relay as shown in Figure 4–3: PHASE TO GROUND TEST CONNECTIONS on page 4–12.
3.
Set the relay into test mode 35 ( I
4.
Set the level of I
op
to I
– 0.1 = [_________] amps rms; the A1 contact should open.
B
5.
Reduce I
to zero.
op
This test applies to blocking schemes only.
NOTE
1.
Protection Settings:
Z2DISTANCE
(205)
Z2GRDCHAR = GDOC
CURSUPVISN
(503)
IPT_PICKUP = [_________] amps
6-6
= I
, I
, or I
(eq. 6–1)
T
A
B
C
, is single-phase and is applied to I
op
to I
+ 0.1 = [_________] amps rms and apply to the relay. The A1 contact should close. Lower I
T
6.3.3 T6 – I
,
I
I
I
=
, or I
(eq. 6–2)
T
A
B
C
, is single-phase and is applied to I
op
Detector). The LUI display contains: IB DETECTOR ON
B
to I
+ 0.1 = [_________] amps rms and apply to the relay. The A1 contact should close. Lower I
B
ALPS Advanced Line Protection System
6 FUNCTIONAL TESTS (USER SETTINGS)
6.3.2 T5 – I
. The ALPS should pick up when I
A
BLOCKING SUPERVISION TEST (BLOCKING SCHEMES)
B
. The ALPS should pick up when I
A
6.3.4 T7 – GROUND DIRECTIONAL TRIP TEST, IPT + NT
6.3.1 WARNING
TRIP SUPERVISION TEST
T
is equal to I
.
op
T
op
is equal to I
.
op
B
op
GE Power Management
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