Connecting Into Service; Removing From Service - GE prolec VR-1 Installation, Operation And Maintenance Manual

3.10 Connecting Into Service

Note: If your regulator is for a 24940-GRDY/14400 or 34500GRDY/19920 volt circuit, read the instructions under section entitled "REGULATOR FOR
GROUNDED-Y CIRCUITS" carefully before installing.
Warning: High Voltage-Current Transformer Circuitry. Do not disconnect the connectors inside this cover unless the
Voltage Regulator is de-energized.
Warning: Do not bypass the voltage regulator unless the neutral position is verified by the neutral indicator light.
The instructions for CONNECTING INTO SERVICE and REMOVING FROM SERVICE without interrupting the load are given
in detail below. Refer to the connection shown in Figure 6.
1. By-pass switch "A" in series with the line should be closed, and load "C" and "D" and source "B" disconnect
switches should be open.
2. Close load (SL) disconnect switch "D" first.
3. Close source (S) disconnect switch "B".
4. GE-2011 Control Instructions (see GEH-7298 for detailed operation instructions):
a. Place the power supply switch to INTERNAL (see Note 1, Fig. 6).
b. Place the motor control switch to MANUAL.
c. Initiate the control switch to RAISE or LOWER to operate the regulator switch mechanism to NEUTRAL (position
"0") as shown on the position indicator. The NEUTRAL position lamp mounted on the adapter panel will light (see
Note 1, Fig. 6). Return the control switch to the OFF position.
d. Place the INTERNAL/EXTERNAL power switch to OFF.
5. Close load disconnect switch "C".
6. Open by-pass switch "A".
7. Visually check the bandcenter, bandwidth and time-delay settings.
8. Visually check the line drop compensation settings.
9. Place the power supply switch to INTERNAL.
10. Place the motor control switch to AUTO.

3.11 Removing from Service

1. Operate the regulator switch mechanism to NEUTRAL (position "0") as shown on the position indicator. The
NEUTRAL position lamp mounted on the circuit board will light. In closed delta banks, all three regulators must be
moved to NEUTRAL position.
2. Turn the control power OFF. In delta hook-ups, turn all controls OFF.
3. Close by-pass switch "A". In delta banks, by-pass all three units.
4. Open load disconnect switch "C" and then open source "B".
5. Open disconnect switch "D" last.
Warning: Do not use any automatic circuit opening elements between the line and the SL bushing, such as: fuses,
cutouts or circuit breakers. This connection should never be opened unless the regulator is in the neutral position. When
the connection to the SL bushing is open, the regulator acts as a current transformer with an open circuit secondary.
Dangerous voltages are induced in the series windings if any load current flows in the series winding.
prolec.energy/prolecge
GEH-7299A: Installation, Operation and Maintenance Manual
for Type VR1™ Single-Phase, Step Type Regulators
12