GE DTR GEK-106305A, Instruction Manual

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2. OPERATION PRINCIPLES
GEK-106305A DTR Digital Tap Changer Controller 13
2.2 MONITORING AND REGISTER FUNCTIONS
2.2.1 MEASUREMENTS
The DTR system shows the following measurements:
Tap :
Current OLTC tap number.
Current (Amp):
Current module on the primary side of the transformer.
Primary voltage (KV):
Phase to phase voltage module on the primary side of the transformer.
Secondary voltage (V):
Phase to phase voltage module on the secondary side of the transformer.
Frequency (Hz):
Voltage Frequency
Active Power (MW):
Three phase active power on the primary side of the transformer.
Reactive Power (MVar):
Three phase reactive power on the primary side of the transformer.
cos phi:
Power factor.
Setpoint (V):
Voltage setpoint (phase to phase).
Rated voltage (V):
Rated voltage (setting)
V difference: (V)
Difference between the real voltage and the setpoint.
Operation Time (s):
Operation time to initiate a tap change.
These measurements can be accessed by means of the two displays on the front of the relay (HMI), or via
communications using the GE_LOCAL software.