SHZV
SHZV
The SHZV vacuum on-load tap changer is designed for oil-immersed voltage regulating transformers. It includes a diverter switch and a tap selector, both immersed in transformer oil. The diverter switch is housed separately, while the tap selector shares the oil tank with transformer windings. It supports three-phase star and single-phase configurations and can be operated locally or remotely via a motor drive unit.
The SHZV OLTC complies with IEC 60214-1:2014 standards. Key specifications include a maximum rated through current of 400 to 3000 A, rated frequency of 50 or 60 Hz, and a maximum rated step voltage of 4000 V. It has a mechanical life of at least 1,500,000 operations and an electrical life of at least 600,000 operations. The oil compartment service pressure is 0.03 MPa, with a rupture disc bursting at 300 ± 20% KPa.
Various models of the SHZV tap changer are detailed, categorized by maximum rated current and specific configurations.
Definitions for technical terms are provided to ensure clarity and understanding of specifications and operational guidelines.
Custom configurations and special design considerations for specific applications are discussed, allowing for tailored solutions.
The tap changer is operated by motor drive units like SHM-D or CMA7, facilitating both manual and automated control.
A range of accessories is available to enhance functionality and integration with existing systems.
Appendixes provide detailed dimensions and configurations of various SHZV models, including diagrams and tables for installation and operational guidance.
Connection methods for the tap selector vary based on phases and rated current. Breaking capacity requirements are according to IEC60214-1: 2014.
References to IEC 60214-1: 2014 for short-circuit current tests and insulation levels are included, specifying service conditions and insulation levels.
Recommendations include special designs for tap winding connections and the use of tie-in resistors if recovery voltage exceeds permissible levels.
Technical data for SHM-D and CMA7 motor drive units are provided, with protective degrees of IP66 and IP56, respectively.
The SHM-K controller features a high-resolution color touch screen and supports digital communication with the motor drive unit.
Designed for use with the CMA7 motor drive unit, it indicates the position of the OLTC and supports control functions.
Working voltage is 220V AC, with a power frequency of 50Hz and maximum operation positions of 107.
Bevel Gearbox: Connects horizontal and vertical shafts, transferring torque from the motor drive unit.
Protective Relay: Activates during gas or oil surges, triggering the transformer circuit breaker.
Pressure Relief Device: Prevents damage from internal pressure build-up with a valve and rupture disc.
Schematics provide visual guidance on component connections and arrangements, highlighting key dimensions for accurate installation.
Catalog excerpts
TECHNICAL DATA TYPE SHZV VACUUM ON-LOAD TAP CHANGER FOR OIL-IMMERSED TRANSFORMER HM0.154.3901-02.06/2018 SHANGHAI HUAMING POWER EQUIPMENT CO., LTD.
Open the catalog to page 1
General 1. General·································································································································3 2. Technical specifications·············································································································4 3. Type designation·····················································································································6 4. Terms and definitions ···············································································································8 5. Special designs ·····················································································································13...
Open the catalog to page 2
Appendix 39 SHZV I 400/600A (ZnO protection) overall dimensions with reversing switch, cage tap selector·····················55 Appendix 40 SHZV I 1200A (ZnO protection) overall dimensions with reversing switch, cage tap selector ·······················56 Appendix 41 SHZV I 1500A (ZnO protection) overall dimensions with reversing switch, cage tap selector ·······················57 Appendix 42 SHZV tap selector contacts arrangement, cylinder tap selector ······················································58 Appendix 43 SHZV tap selector contacts arrangement, cage tap selector ·························································59...
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