3-48
•
••
•
Chapter 3 Paramters/Functions Innovation Series Medium Voltage GP Type - G Drives GEH-6385

External line referenc e functional ity

The use of an ELR is recommend ed when the phase angle and magnitude of th e
utility feed the dri ve is expected to transfer the motor to can not be accurately
predicted from the pha se angle and magnitude of the ILR. Such situations can arise
when transferring the motor to a generator, to a utility feed separ ate from the one
supplying the drive or in certain plants where multiple transformers with varying
loads are involved. See th e "Innovation Series Line Tran sfer Application Guide" for
a complete discussion of issues related to line reference selection .
The following table specifies variables related to the external line r eference
functionality.
Variable Description
Ext ref phase AB External line reference analog input vol tage.
Ext ref feedback External line reference scaled to represent actual line
voltage.
Motor Equivalent Circuit
The Motor Eq uivalent Cir cuit function implem ents the equivalent circuit of th e
motor.
Function configuration
The following table lists the configuration parameter s for the Motor Equivalent
Circuit.
Parameter Description
Stator hot res R1 Stator hot resistance. Ohms
Stator cold res R1 Stator cold resistance. Ohms
Rotor hot res R2 Rotor hot resistance. Ohms
Rotor cold res R2 Rotor cold resistance. Ohms
Magnetizing react Xm Magnetizing reactance. Ohms
Stator lkg react X1 Stator leakage reactance. Ohms
Rotor lkg react X2 Rotor leakage reactance. Ohms
Starting react Xst Starting reactance. Ohms
Rated rotor temp Rated rotor temperature. Degrees C or Degrees F
Motor ambi ent temp Motor ambient tem perature. Degr ees C or Degrees F