Cooper VR-32 User Manual

Refer to page 1-2 of these instructions for the definitions of warning and caution alerts.These instructions do not claim to cover all details or varia-
tions in the equipment, procedure, or process described, nor to provide direction for meeting every possible contingency during installation, opera-
tion, or maintenance. When additional information is desired to satisfy a problem not covered sufficiently for the user’s purpose, please contact your
Cooper Power Systems representative.
October 1992, reprint of 2/91
●
1992
©
Cooper Power Systems, Inc.
Voltage Regulators
Cooper Power System's VR-32 Regulator and CL-2A Control
Installation, Operation and Maintenance Instructions
Parts Replacement Information
1
Cooper Power Systems
S225-10-5
Service Information
TABLE OF CONTENTS
VR-32 REGULATORS - SECTION 1
Introduction ..................................................... 1-3
Receiving ........................................................ 1-3
INSPECTlON ............................................... 1-3
UNLOADING ................................................ 1-3
STORING ..................................................... 1-3
Installation ....................................................... 1-3
PRE-INSTALLATlON INSPECTlON ............. 1-3
NAMEPLATE................................................. 1-4
SYSTEMS CONNECTIONS ........................ 1-4
MOUNTING ................................................. 1-5
PLACING A REGULATOR INTO SERVICE . 1-5
Removal From Service ................................... 1-6
DETERMINING NEUTRAL POSITlON ........ 1-6
DE-ENERGIZING THE REGULATOR ......... 1-6
Maintenance Program .................................... 1-6
PERIODIC INSPECTlONS .......................... 1-6
REMOVAL OF CL-2A FRONT PANEL ......... 1-7
REPLACEMENT OF CL-2A FRONT PANEL ....... 1-7
UNTANKING THE REGULATOR ......................... 1-7
RETANKING THE REGULATOR ......................... 1-7
MAINTENANCE.................................................... 1-8
Construction........................................................... 1-8
SURGE PROTECTION ........................................ 1-8
POSlTlON lNDlCATOR & ADD-AMP .................... 1-8
INTERNAL CONSTRUCTlON &
WIRING DIAGRAMS ......................................... 1-10
CL-2A REGULATOR CONTROL - SECTION 2
Introduction ............................................................ 2-2
Specifications......................................................... 2-2
Pre-Installation Operational Check ...................... 2-2
In-Service Calibration Check ............................... 2-2
Setting the CL-2A Control for Service ................. 2-3
Control Operation Modes ..................................... 2-4
CL-2A Control Operation ...................................... 2-4
DEVELOPMENT OF POTENTIALS ..................... 2-7
LINE DROP COMPENSATOR.............................. 2-9
MOTOR CIRCUIT ................................................ 2-10
Automatic/Manual Operation ............................... 2-10
Supervisory Control and Data
Acquisition (SCADA) ............................................ 2-10
Voltage Reduction ................................................. 2-11
Retrofitting a CL-2A Control ................................. 2-11
VR-32 REGULATOR TAP CHANGER - SECTION 3
Tap Changer Operation ........................................ 3-1
Motor ....................................................................... 3-1
Reversing Switch .................................................. 3-1
Drive Mechanisms ................................................. 3-2
Contacts ................................................................. 3-3
Operating Sequence ............................................. 3-3
TROUBLE SHOOTING GUIDE - SECTION 4
Complete Regulator In Service ............................ 4-1
EXTERNAL CHECK ............................................. 4-1
DEFINING THE PROBLEM ................................. 4-1
JUNCTlON BOX TROUBLE SHOOTlNG ............. 4-1
POSlTlON lNDlCATOR REPLACEMENT ............ 4-2
FRONT PANEL TROUBLE SHOOTING .............. 4-3
CIRCUIT BOARD TROUBLE SHOOTlNG............ 4-4
CIRCUIT BOARD REMOVAL ............................... 4-10
ACCESSORIES - SECTlON 5................................. 5-1
SPARE PARTS - SECTION 6 ................................. 6-1
APPENDIX - SECTION 7 ........................................ 7-1
Serial Numbers....................................................... 7-1
List of Tables ......................................................... 7-1
List of Diagrams ..................................................... 7-1

Cooper VR-32 Specifications

General

Brand	Cooper
Model	VR-32
Category	Controller
Language	English

Summary

VR-32 Regulator Installation and Service

INTRODUCTION

Overview of VR-32 regulators, their features, and application.

RECEIVING AND STORING

Procedures for inspecting, handling, and storing regulator shipments upon arrival to prevent damage.

INSTALLATION PROCEDURES

Steps for pre-installation inspection and checks before connecting the regulator to the line.

MOUNTING THE REGULATOR

Options and procedures for mounting the regulator on poles, cross arms, or elevating structures.

PLACING REGULATOR INTO SERVICE

Procedures for safely energizing the regulator without interrupting load continuity.

REMOVAL FROM SERVICE

Steps to safely remove the regulator from service, ensuring it is in the neutral position.

MAINTENANCE PROGRAM

Recommended maintenance steps for ensuring regulator longevity and proper operation.

CL-2A Regulator Control Operations

CONTROL INTRODUCTION AND CHECKS

Introduction to the CL-2A control, its enhancements, and pre-installation/in-service operational checks.

SETTING THE CL-2A CONTROL FOR SERVICE

Guidance on setting voltage, bandwidth, time delay, and line drop compensation parameters.

CONTROL OPERATION MODES

Explanation of sequential, time integrating, and voltage averaging response modes for control operation.

CL-2A CONTROL OPERATION

Detailed description of the CL-2A control's design, components, and functional operation.

VR-32 Regulator Tap Changer Operations

TAP CHANGER MECHANISMS

Explanation of spring-drive and direct-drive tap changer mechanisms, including motor and reversing switch functions.

SPRING-DRIVE OPERATING SEQUENCE

Step-by-step description of the spring-drive tap changer operation sequence from neutral to tap change.

DIRECT-DRIVE OPERATING SEQUENCE

Step-by-step description of the direct-drive tap changer operation sequence from neutral to tap change.

Regulator Troubleshooting Guide

COMPLETE REGULATOR TROUBLESHOOTING

Initial checks and diagnostic steps for a regulator that is not operating, covering external and internal issues.

MANUAL OR AUTOMATIC OPERATION ISSUES

Troubleshooting specific problems with manual, automatic, or incorrect automatic operation modes.

JUNCTION BOX AND PANEL ISSUES

Diagnosing problems related to junction boxes, position indicators, front panels, and associated wiring.

CIRCUIT BOARD TROUBLESHOOTING

Detailed steps for diagnosing and resolving issues with the printed circuit board components and settings.

Regulator Accessories

ENVIRONMENTAL AND VOLTAGE CONTROL ACCESSORIES

Accessories for environmental control (heater) and voltage management (reduction, limiter).

METERING AND DATA ACCESSORIES

Accessories for monitoring, metering, and data management (Auxiliary CT, Meter Pac, Data Reader).

FAN COOLING ACCESSORY

Accessory to increase load capacity of larger regulators, controlled by top-oil temperature.

Spare Parts Information

SPARE PARTS LIST

A comprehensive list of available spare parts, including part codes, descriptions, and reference figures.

Appendices

SERIAL NUMBERS

Explanation of the coding system used for regulator serial numbers, indicating manufacture date and location.

SCHEMATIC DIAGRAMS AND TABLES

Lists of schematic diagrams and tables found in the document for reference and detailed information.