GE SPM Series, Instruction Manual

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GE Power Management SPM Synchronous Motor Protection & Control 2-
7
2 INSTALLATION 2.3 ELECTRICAL INSTALLATION
2
2.3.9 POWER FACTOR REGULATION OUTPUT
This optional output replaces the power factor analog signal output. It consists of a 0 to 10 V DC control signal
which is used to control an SCR Variable Exciter output to obtain motor power factor regulation.
2.3.10 CONTROL VOLTAGE
If control voltage excursions occur outside the range of 85 to 265 V AC, a provision is available that will allow
the user to connect an external stabilizing transformer for operation with severe control power voltage dips.
The SPM has separate inputs for control power and power factor reference voltage. This allows connection for
control power from a stabilized voltage source of 115 V AC or 230 V AC. Terminal points "V
1EXT
" and "V
2EXT
"
have been added to accommodate the separate PF reference voltage.
2.3.11 EXTERNAL VOLTAGE PF REFERENCE
When terminal points "V
1EXT
" and "V
2EXT
" are used to accommodate a separate PF reference voltage, as
described above, a standard protective function will alert the user should this external voltage drop below the
acceptable limits for the SPM power supply. This protection will not allow the motor to start while the external
voltage is missing, but the SPM will not require a reset before the motor can be restarted. If the external refer-
ence voltage is lost while the motor is running, the SPM will trip the motor and will require a reset before the
motor can be restarted. "MISSING VOLTAGE!" will be displayed until reset.
Figure 2–5: REFERENCE VOLTAGE INPUT CONNECTIONS