Schweitzer Engineering SEL-300G, Quick Start Manual

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8
SEL-300G Relay Quick-Start Guide Date Code 20170804
Relay Commissioning Procedure
Commissioning Procedure
If pickup settings for 100% stator ground element 64G2 have
not been calculated, leave Relay Word bit 64G2T out of
tripping control equations. Set the Breaker Monitor function
SEL
OGIC®
control equation enable BKMON = 0 in the Global
relay settings. This disables the Breaker Monitor function while
the relay is being tested.
Step 12. Verify relay ac connections. Connect the protective relay ac test
signal source to the SEL-300G through the ac protection
cabinet wiring. (You may connect directly to the relay, however
this does not verify the accuracy of the wiring in the protection
cabinet.) Apply rated ac voltage (67 V1n, 120 V11) and current
(1 A or 5 A) to the relay phase voltage and current inputs. Set
the test source phase angles to supply no phase difference
between phase voltage and phase current.
If a three-phase test source is used, set the source phase angles
as shown in
Figure 4 :
Figure 4 Three-Phase AC Connection Test Voltage Signals
If open-delta potentials are used, set the test source phase
angles as shown in
Figure 5 .
+120°
–120°
V
C
V
B
V
C
V
A
PHROT := ABC
+120°
–120°
PHROT := ACB
V
B
V
A
When setting PHROT := ABC, set angle V
A
= angle I
A
= 0°
set angle V
B
= angle I
B
= —120°
set angle V
C
= angle I
C
= 120°
When setting PHROT := ACB, set angle V
A
= angle I
A
= 0°
set angle V
B
= angle I
B
= 120°
set angle V
C
= angle I
C
= —120°