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Huaming CVIII 350Y User Manual

Huaming CVIII 350Y
65 pages
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Operating Instructions
HM 0.460.001-02.05/2021
CV & SV
On-Load Tap-changer
IMPORTANT:
Please read this manual carefully
before using the tap-changer and
save it for reference.

Table of Contents

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Huaming CVIII 350Y Specifications

General IconGeneral
BrandHuaming
ModelCVIII 350Y
CategoryIndustrial Electrical
LanguageEnglish

Summary

1. Foreword & Safety

1.1 Safety Instructions

Covers essential safety guidelines, personal protective equipment, and warnings for safe operation.

3. Technical Data

3.2 Operation Conditions

Specifies the required environmental and operating parameters for the tap-changer.

4. Type Designation

4.1 Model Breakdown

Explains the coding system used to define tap-changer specifications.

4.2 Insulation Levels

Details internal insulation ratings for various tap-changer configurations.

5. Packing, Transport & Storage

5.1 Supplied Components

Lists the essential parts included in the complete tap-changer set.

5.2 Transportation & Acceptance

Outlines critical procedures for safe transport and goods receiving.

5.3 Storage Guidelines

Provides instructions for proper warehousing of the tap-changer.

6. Mounting Procedures

6.1 Mounting Flange Requirements

Specifies the design details for the transformer mounting flange.

6.2 Standard Mounting

Details the procedure for mounting the tap-changer on standard transformer types.

6.3 Bell-Type Mounting

Describes the installation steps for bell-type transformers.

7. Performance Testing

7.1 Transformer Ratio Test

Explains the procedure for conducting the transformer ratio test.

7.2 DC Resistance Measurement

Describes how to perform DC resistance measurements.

8. Drying & Oil Filling

8.1 Drying Process

Methods for ensuring insulation integrity through drying.

8.2 Oil Filling

Correct procedures for filling the unit with transformer oil.

9. Installation & Calibration

9.5 Drive Shaft Installation

Details the process for installing horizontal and vertical drive shafts.

9.8 Tap Position Calibration

Critical steps for synchronizing the tap-changer and MDU.

10. Factory Testing

10.1 Test Preparation

Essential preparatory steps before factory testing.

10.2 Test Procedures

Steps for operation and electrical tests.

11. On-Site Operations

11.1 MDU Removal for Transportation

Steps for removing the Motor Drive Unit before transport.

11.4 Putting into Operation

Final steps to commission the transformer and tap-changer.

13. Maintenance & Safety

General Maintenance Safety

Critical safety warnings for performing maintenance.

13.1 Inspection

Regular checks for ensuring performance and detecting issues.

13.2 Maintenance Intervals

Recommended schedule for major maintenance tasks.

13.3 Oil Filter Recommendations

Advises on oil filter installation based on environment and usage.

14. Appendices

Appendix 1: Flange Dimensions

Technical drawings of connection flange dimensions.

Appendix 4: Lifting Tool Diagram

Illustrates the design and use of the OLTC lifting tool.

Appendix 5: Protective Relay Installation

Shows dimensions and installation guidance for protective relays.

Appendix 10: Operating Positions

Table and diagram showing operating positions and connections.