Schweitzer Engineering Laboratories SEL-701, Instruction Manual

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701 Motor Protection Relay
Date Code 20010719
Commissioning
Relay Commissioning Procedure
7.4
current correctly, taking into account the relay PTR and CTR
settings and the fact that the quantities are displayed in primary
units. This step verifies the signal polarity and per-phase ac
connections to the relay.
Apply rated ac current (1 A or 5 A) to the relay IN input if used.
Use the front-panel or serial port
METER function to verify that
the relay is measuring current magnitude and phase angle
correctly, taking into account the relay CTRN setting and the
fact that the quantities are displayed in primary units.
Figure 7.1 Three-Phase AC Connection Test Signals.
+120°
-120°
V
C
V
B
V
A
PHROT = ABC
+120°
-120°
PHROT = ACB
V
B
V
C
V
A
When setting PHROT = ABC, set angle Va
set angle Vb
set angle Vc
= angle Ia
= angle Ib
= angle Ic = 0°
= -120°
= 120°
When setting PHROT = ACB, set angle Va
set angle Vb
set angle Vc
= angle Ia
= angle Ib
= angle Ic = 0°
= 120°
= -120°