GEH-7299A: Installation, Operation and Maintenance Manual
for Type VR1™ Single-Phase, Step Type Regulators
prolec.energy/prolecge
6
1. INTRODUCTION
The Prolec GE Type VR-1 step voltage regulator (Figure 1.) is essentially a single-phase, regulating autotransformer. A
to 10 percent below line voltage in thirty-two, 5/8 percent steps.
responds to changes in the system voltage to initiate the desired tap change.
To help maintain dependable service with minimum maintenance, read these instructions carefully before installing or
operating your Prolec GE step voltage regulator.
2. RECEIVING
2.1 Shipping Damage
Immediately upon receipt of the regulator, carefully examine the outside of the equipment to determine any damage or
transportation company immediately and notify your Prolec GE respresentative or GE account manager promptly.
2.2 Storing
If the regulator is not installed immediately, store in a clean, dry place.
2.3 Warranty
Your Prolec GE VR-1 regulator warranty shall expire twelve (12) months from the date of energization or eighteen (18)
3. INSTALLATION
3.1 Inspecting
3.1.1 General
neutral position, and the voltage bandcenter is set for a normal voltage of 120 volts and a 1.5-volt bandwidth.
Carefully inspect the regulator, particularly the porcelain bushings. If there is any evidence or suspicion that moisture has
inside the tank with dry insulation oil under pressure.
Avoid the use of cottonwaste or similar material, which may become caught in the mechanism. Oil should be visible in the
sight gauge at all times.
Warning: Static charges can be developed when oil ows in pipes, hoses, and tanks. Oil Leaving a lter press may be
charged to over fty thousand volts (50,000 V). To accelerate dissipation of the charge in the oil, ground the lter press,
the tanka nd all the windings (if accessible). Conduction through oil is slow; therefore, it is desirable to maintain these
grounds for at least one (1) hour after the oil ow has stopped. Remove explosive gas mixtures from any container into
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