GE TRANSFORMER MANAGEMENT RELAY 745 Instruction Manual page 153

6 ACTUAL VALUES
6.3A2 METERING
a) MAIN MENU
PATH: ACTUAL VALUES
CURRENT
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For each monitored winding, the fundamental frequency magnitude and phase angle of phase A, B, C and ground currents
are recalculated every half-cycle for use in differential and overcurrent protection. From these values, neutral, positive, neg-
ative and zero-sequence as well as differential, restraint and ground differential currents are calculated. These are dis-
played and updated approximately twice a second for readability.
b) WINDING CURRENTS
PATH: ACTUAL VALUES
W1 CURRENT
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The fundamental frequency current magnitudes for Winding 1 phases A, B, and C, neutral, and ground are shown. The cur-
rent angle for Phase A is always set to 0° as it is used as reference for all other currents, both measured and derived. The
maximum specified load and average phase current are also shown for the specified winding.
GE Multilin
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A2 METERING CURRENT
ð
W1 CURRENT
ENTER
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ESCAPE
W2 CURRENT
ESCAPE
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MESSAGE
W3 CURRENT
ESCAPE
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MESSAGE
POSITIVE SEQUENCE
ESCAPE
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MESSAGE
NEGATIVE SEQUENCE
ESCAPE
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MESSAGE
ZERO SEQUENCE
ESCAPE
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MESSAGE
DIFFERENTIAL
ESCAPE
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MESSAGE
RESTRAINT
ESCAPE
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MESSAGE
GND DIFFERENTIAL
ESCAPE
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MESSAGE
A2 METERING CURRENT W1(3) CURRENT
ð
W1 PHASE A CURRENT:
ENTER
0 A at 0° Lag
ESCAPE
W1 PHASE B CURRENT:
ESCAPE
0 A at 0° Lag
MESSAGE
W1 PHASE C CURRENT:
ESCAPE
0 A at 0° Lag
MESSAGE
W1 NEUTRAL CURRENT:
ESCAPE
0 A at 0° Lag
MESSAGE
W1 GROUND CURRENT:
ESCAPE
0 A at 0° Lag
MESSAGE
WINDING 1 LOADING:
ESCAPE
0% of rated load
MESSAGE
W1 AVERAGE PHASE
ESCAPE
CURRENT:
MESSAGE
745 Transformer Management Relay
See below.
See page 6–6.
See page 6–6.
See page 6–6.
See page 6–7.
See page 6–7.
See page 6–7.
0 A
6.3 A2 METERING
6.3.1 CURRENT
6
6-5