Tools / Generators
HZBZ-IV 10000kVA/33KV Automatic Comprehensive Transformer Test Bench
A fully automated, PLC-controlled test system designed for routine, type, and special testing of 11-33kV class distribution transformers up to 10000kVA.
Table of contents
System Overview
The HZBZ-IV Automatic Comprehensive Test System is a professional-grade solution designed for routine, type, and special testing of distribution transformers. It supports a wide range of transformer capacities up to 10000kVA and primary voltages up to 33kV. The system architecture utilizes a PLC as the core control unit integrated with an industrial control computer, providing a reliable, intuitive, and highly efficient testing environment.
Test Capabilities
The system is engineered to perform a comprehensive suite of tests, including:
- Transformation ratio and vector group testing
- DC resistance measurement
- No-load loss and current percentage testing
- Load loss and short-circuit impedance testing
- Induced overvoltage withstand testing
- Power frequency withstand voltage testing
- Temperature rise testing
All test items are managed through integrated software, which allows for automated data acquisition, processing, and report generation, significantly reducing manual labor and human error.
Control and Safety
Safety is paramount in the HZBZ-IV design. The system includes multiple layers of protection, such as emergency stop buttons, overcurrent and overvoltage protection, and zero-boost protection to ensure the equipment and the transformer under test are not damaged during operation. Communication between the PLC and the industrial computer is achieved via RS-485 with full electrical isolation to suppress signal interference.
Data Management
The system features a robust database for storing measurement results with unique identification numbers. Test records can be easily queried, and the software supports automatic generation of reports in Microsoft Excel format. Customized report templates can be created to meet specific user requirements, facilitating professional documentation and analysis.
Installation and Maintenance
The system is designed for quick installation, with internal wiring completed at the factory. The control cabinet is a containment structure that can be hoisted as a whole. Regular maintenance involves checking the grounding resistance (which must be less than 0.5 ohms) and ensuring the power supply meets the required 50Hz/500A specifications. The supplier provides a lifetime warranty policy with a one-year free warranty period for international customers.
Manufacturer information
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Practical help
Common problems
Voltage regulator not in zero position
The system will prevent power transmission; manually or automatically return the regulator to the zero position before starting.
Measurement exceeds safety margin
The system will issue a warning and suspend step-up; if the margin is exceeded, an emergency stop is triggered automatically.
Before use
- Ensure power supply is 50Hz +/- 0.1 and current is at least 500A.
- Verify grounding resistance is less than 0.5 ohms.
- Check that all emergency stop buttons are accessible.
- Ensure the voltage regulator is in the zero position.
- Confirm all cable connections are secure.
Specs in practice
- Transformer Capacity
- Supports testing for transformers ranging from 5kVA up to 10000kVA depending on voltage class.
- Primary Voltage
- The system is compatible with transformers having primary voltages up to 33kV.
- Measurement Accuracy
- Basic measurement accuracy for voltage and current is +/- 0.1%.
Images and diagrams
- The control loop manages the power supply and regulation.
- The measuring loop connects the transformer under test to the instrumentation.
- The system uses a PLC for logical control and an industrial PC for the user interface.
Model compatibility
- Designed for 11-33kV class distribution transformers.
- Requires a 380V three-phase power supply.
- Compatible with external voltage and current transformers for ranges beyond standard instrumentation.
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.