Pole Mounted Automatic Voltage Regulator

Model Number

PVR-32

Introduction

IEC PVR-32 feeder voltage regulators are regulating auto transformers. They regulate line voltage from ten-percent rraise(boost) to ten-percent lower(buck) in 32, approximately 5/8 percent steps. IEC regulators are supplied with the following standard features :

• Dual-rated 55/65°C rise
• ADD-AMP capability
• Unit construction
• Sealed-tank construction
• Pressure relief device
• High-creep bushings with clamp-type terminals
• MOV-type external series arresters
• Shunt arrester mounting bosses
• Two nameplates
• Oil sight gauge
• Upper filter press connection
• Drain valve and oil-sampling device

The 65°C rise insulation system and the sealed-tank construction allow for a BONUS CAPACITY 12% above the 55°C normal rating without loss of normal insulation life. The BONUS CAPACITY is stated on the nameplate, and is available when the ADD-ANP feature is not in use. All IEC regulators are manufactured and tested to ANSI Standard C57.15. The unit construction, which suspends the internal assembly and the control enclosure from the cover, allows for ease of inspection and maintenance.

There are three types of pole mounted automatic voltage regulators : source-sids series winding, load-side series winding, and series transformer. IEC regulators are usually equipped with an equalizer winding. The nameplates located on the tank and control box clarify the power circuit involved.

PVR-32 Regulator and CL-2A Control

Setting the CL-2A control for service

This CL-2A Control describes the user selectable control settings and aides in determining the correct values for the application. There are a total of seven control settings to be determined :

1. Voltage setting, continuously variable from 105 to 135 volts.
2. Bandwidth setting, variable from l volt to 6 volts in 0.5 volt increments.
3. Time delay setting, variable from l 10 seconds to 120 seconds in 10 second in crements, or by using the time doubling feature, from 20 seconds to 240 seconds in 20 second increments.
4. Line drop compensation for resistance, continuously variable from0 to 24 volts.
5. Line drop compensation for resistance, continuously variable from0 to 24 volts in l volt increments.
6. Line drop compensation control switch for establishing the polarity(±) for each of the R & X line drop compensation-elements.
7. Control operating mode, selectable between dequential mode, time integrating, or voltage averaging. This feature is implemented via a dip switch, located on the printed circuit board.