Description
- The 745 provides a voltage input for the purposes of energization detection (for the
energization inhibit feature of the percent differential element), overexcitation protection
(the volts-per-hertz 1 and 2 functions), and frequency protection (the underfrequency,
frequency decay, and overfrequency functions). Note that the frequency elements will use
the winding 1 phase A current input if voltage is not available.
VOLTAGE INPUT PARAMETER: Enter the winding and phase of the voltage connected
to the voltage input.
NOMINAL VT SECONDARY VOLTAGE: Enter the nominal secondary voltage (in volts) of
the voltage transformer.
VT RATIO: Enter the ratio of the voltage transformer.
- The 745 provides a general purpose DC current input for use in monitoring any external
parameter. Any standard transducer output may be connected to the analog input for
monitoring.
ANALOG INPUT NAME: Press ENTER to begin editing the name of the analog input.
The text may be changed from “Analog Input” one character at a time, using the
VALUE keys. Press the ENTER key to store the edit and advance to the next character
position. This name will appear in the actual value message A2 METERING
ANALOG INPUT.
ANALOG INPUT UNITS: Enter the units of the quantity being read by editing the text as
described above. The six characters entered will be displayed instead of “Units”
wherever the analog input units are displayed.
ANALOG INPUT RANGE: Select the current output range of the transducer that is
connected to the analog input. The units are defined by the ANALOG INPUT UNITS
setpoint.
ANALOG INPUT MINIMUM/MAXIMUM: Enter the value of the quantity measured
which corresponds to the minimum/maximum output value of the transducer. The
units are defined by the ANALOG INPUT UNITS setpoint.
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