Copeland 085-0160-00 - User Manual

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Printed in U.S.A.

10-1313

Copeland 10-1313

Application Engineering Bulletin

AE-1313

Issued September, 2000

GUIDELINES TO USING A THREE PHASE VOLTAGE MONITOR

10-1313

INTRODUCTION

A phase monitor can be used with any three phase

motor. A monitor such as the Copeland 085-0160-00 is

recommended for monitoring remote locations or envi-

ronments with a history of adverse voltage fluctuations.

Many compressor failures are caused by an intoler-

able line voltage. These voltage variations can have

many different sources such as contactor failure or

ground interference. Irrelevant of the cause, compres-

sor failures due to voltage fluctuations may be pre-

vented. Although the voltage fluctuations themselves

may be inevitable, actual motor damage can usually be

averted.

FAULT DETECTION

The phase monitor checks for critical faults

•Phase loss

•Phase reversal

•High voltage

•Low voltage

•Voltage unbalance

A phase reversal is very damaging to phase sensi-

tive machines such as scroll compressors, screw com-

pressors, and fan motors. A phase loss will cause

excessively high current resulting in high temperatures

in the other two motor phases. High voltage causes

excessive temps inside the motor. Low voltage in-

creases the slip of the motor producing excess heat.

Phase unbalance is when the voltage to each phase is

not equal, as a result, some windings do more work than

others. This causes excessive heat.

ELECTRICAL WIRING SET UP

For single contactor systems, connect the monitor

to the three phase power supply as shown in Figure 1 .

For a part winding start with two contactors and two

phase monitors, connect the monitors as shown in

Figure 2.

Figure 1

Voltage Wiring for Three Phase Line Monitors

*1 amp fuse recommended

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Summary

Guidelines for Three Phase Voltage Monitor Usage

Introduction to Phase Monitors

Explains the purpose and benefits of using a phase monitor for three-phase motors.

Fault Detection Capabilities

Lists critical faults like phase loss, reversal, high/low voltage, and unbalance checked by the monitor.

Electrical Wiring Setup

Details how to connect the phase monitor to a three-phase power supply, referencing wiring diagrams.

Part Winding Start (PWS) Configuration

Operational Details and Settings

Load;Alarm Relay Function

Explains the function of the load/alarm relay and its terminal connections for control circuits.

Adjustable Parameter Settings

Details parameters like voltage settings, timing, unbalance, and reset modes for the monitor.

Touchpad Interface and Controls

Describes the touchpad controls for navigating setup, reading values, and clearing faults.

Troubleshooting Guide