Huazheng HZBB-10A - User Manual

HZBB-10A
Transformer Turns Ratio Tester
Huazheng Electric Manufacturing (Baoding) Co., Ltd

Summary

Preface

Introduction to the Transformer Turns Ratio Tester

Provides an overview of the HZBB-10A tester and its advantages over traditional methods.

Functions and Features of the Transformer Turns Ratio Tester

Precision Inverter Power Supply

Uses three-phase precision inverter power supply, eliminating harmonics for accurate measurements.

Three-Phase Output and Angle Measurement

Measures angle between phases, identifies wiring groups, and tests multi-winding transformers without disconnecting low-voltage side.

Transformer Compatibility

Suitable for Z-type, rectifier, grounding, electric furnace, phase shifting, and balance transformers.

Protective Features

Includes protection against reverse connection, short circuits, and tap switch failures for stability.

Automatic Measurement Capabilities

Automatically measures transformer ratio, error, and tap-changer position after parameter input.

Display and User Interface

Features a 7-inch HD color touch-screen LCD with modular display for clear visibility.

Connectivity and Data Output

Equipped with print output, USB, and RS232 ports for convenient paperless operation.

Durable Construction

Housed in a durable, sealed, waterproof, and shock-resistant plastic box for field use.

Technical Specifications

Ratio and Angle Measurement Range

Specifies the variable ratio range from 0.9 to 10000 and angle measurement from 0 to 360 degrees.

Measurement Accuracy

Provides accuracy specifications for different measurement ranges: ±0.1%, 0.2%, and 0.5%.

Output Voltage and Resolution

The output voltage adjusts automatically based on load; minimum ratio resolution is 0.0001.

Operating Conditions

Specifies power supply (AC 220V), temperature (-10℃~40℃), and humidity (≤85%).

Physical Dimensions and Weight

Details the dimensions (360x290x170mm) and weight (tester 5.9KG, wire box 5.65KG).

Operating Panel and Interface

Control Panel Layout

Describes the HD color LCD screen and its adjustable backlight for displaying menus and results.

High Voltage Side Connection

Instructions for connecting the high voltage side terminals to the transformer's A, B, C, O bushings.

Low Voltage Side Connection

Instructions for connecting the low voltage side terminals to the transformer's a, b, c, o bushings.

Power and Communication Ports

Details AC 220V power input, protective grounding, serial communication, and USB storage.

Operating Instructions

Instrument Startup and Menu Navigation

Explains the main menu options on the instrument's startup interface.

Three-Phase Test Interface

Describes the interface used for performing three-phase transformer tests.

Interface Interaction and Data Input

Details how to interact with interface elements like text boxes and buttons for setting values.

Test Completion and Data Management

Describes the interface after test completion, including options to save or print.

Turn Ratio Test Results Display

Displays the results of a transformer turn ratio test, including ratio, error, and angle.

Date and Time Setting

Explains how to access and modify the instrument's date and time settings.

Data Query and Historical Records

Describes the interface for querying and viewing historical test data.

System Settings and Bluetooth Control

Details system settings like memory management and Bluetooth connectivity for mobile control.

Connecting Method

Three-Phase Transformer Wiring Diagram

Illustrates the wiring connection for a three-phase transformer (Y-d-11).

Single-Phase Transformer Wiring Diagram

Shows the wiring connection for a single-phase transformer.

Z-Type Transformer Wiring Diagram

Depicts the wiring configuration for a Z-type transformer.

Notice

Tap Changer and Data Input

Guidance on inputting tap data and how the instrument calculates error automatically.

Voltage Division and Tapping Interpretation

Explains voltage division, sub-level interpretation, and rated tapping values.

Turn Ratio Calculation for Different Connections

Details turn ratio calculation for star/delta connections and voltage transformer types.

Transformer with Neutral Point

Discusses measurement deviations for transformers with neutral points like YN-d-11.

Tap Changer Files and Low Voltage Levels

Instructions for tap changer files and handling low voltage levels.

Instrument Common Problems and Inspection Methods

Self-Test Procedure for Abnormal Readings

Provides a self-test method and wiring diagram for diagnosing abnormal test results.

Normal Operation Indicator

Explains how a measurement value of 1.0000 indicates normal instrument operation.

After-Sale Service

Warranty and Repair Services

Product warranty for one year and provision of lifetime reparation and technical services.

Packing List

Included Accessories

Lists the main engine and accessories included in the product package.

Overview

1. Function Description
2. Important Technical Specifications
3. Usage Features
4. Maintenance Features

This document describes the HZBB-10A Transformer Turns Ratio Tester, a device designed to measure the turns ratio or voltage ratio of transformers. It aims to simplify and automate the testing process compared to traditional bridge methods.

Function Description

The HZBB-10A Transformer Turns Ratio Tester is used for measuring the turns ratio or voltage ratio of transformers. It is particularly useful during the production of semi-finished and finished transformers, as well as for newly installed transformers, to ensure compliance with IEC and national standards. Unlike traditional bridge methods, this instrument provides direct data readings without requiring manual conversions. It can perform tests on three-phase voltage ratios or turns ratios in a single operation, offering fast and highly precise results.

Key functions and features include:

• Three-phase precision inverter power supply: Integrates a three-phase precision inverter power supply to eliminate the influence of mains voltage harmonics, ensuring more accurate measurements. It is also unaffected when operating with a generator as the power source.
• Three-phase output voltage: Utilizes three-phase output voltage to enhance test speed. It can measure the angle between phases and automatically identify wiring groups from 0 to 11.
• Versatile transformer compatibility: Suitable for a wide range of transformers, including Z-type transformers, rectifier transformers, grounding transformers, electric furnace transformers, phase-shifting transformers, and balance transformers. For low-voltage rectifier transformers with multiple windings, it can measure the transformation ratio and 7.5° angle deviation without disconnecting the low-voltage side.
• Protection features: Incorporates high and low voltage reverse connection protection, transformer turn short-circuit protection, tap switch failure protection, and output full short-circuit protection, enhancing instrument stability.
• Automatic parameter calculation: After inputting rated parameters, the instrument can automatically calculate the transformer ratio value, error value, and on-load tap-changer position.
• User-friendly interface: Features a 7-inch high-definition color touch-screen LCD with modular display, ensuring clear visibility even under strong light. The menu-driven operation is designed for ease of use.
• Data output and storage: Equipped with print output, a USB port, and an RS232 port for convenient data management and paperless office integration.
• Durable design: Housed in a cold and heat-resistant, sealed, waterproof, anti-shock, multi-function engineering plastic box, making it suitable for field testing.

Important Technical Specifications

• Rating:
  • Variable Ratio: 0.9 ~ 10000
  • Angle: 0 - 360°
• Angle measurement: 0 - 360°
• Accuracy:
  • ±0.1% (below 500)
  • 0.2% (501 - 2000)
  • 0.5% (2001 - 10000)
• Output voltage: Automatically adjusted according to load.
• Resolution:
  • Minimum Ratio: 0.0001
  • Angle: 0.01°
• Working power supply: AC 220V ± 10%, 50Hz
• Applied temperature: -10℃ ~ 40℃
• Relative humidity: ≤85%, non-condensing
• Dimensions:
  • Tester: 360 x 290 x 170 mm
  • Wire box: 360 x 290 x 170 mm
• Weight:
  • Tester: 5.9 KG
  • Wire box: 5.65 KG

Usage Features

The HZBB-10A is designed for straightforward operation with its touch-screen interface.

Operating Panel Instructions:

1. Screen: A high-definition color array LCD with digital backlight adjustment displays the operation menu and test results.
2. High voltage side: Connects to the instrument terminal. The yellow, green, red, and black leads correspond to the A, B, C, and O bushings of the transformer.
3. Low voltage side: Connects to the instrument terminal. The yellow, green, red, and black leads correspond to the a, b, c, and o bushings of the transformer.
4. AC 220V: Power input for the instrument, requiring an AC 220V frequency power supply.
5. Protective grounding column: For grounding the instrument.
6. Communication: Serial communication port.
7. USB: For U disk storage of test data.
8. Printer: For printing test results.

Menu Description and Operation:

• Startup Interface: After powering on, the instrument displays a startup interface with six functional options: [Three Phase Measurement], [Single Phase Measurement], [Z-Type Transformer], [Scott Transformer], [File Recording], and [System Setting]. Users can click any button to access the corresponding function.
• Inputting Parameters: Pressing a text box on the interface will bring up an input keyboard, allowing users to enter specific values. Standard values can be changed using a dedicated button.
• Test Completion Interface: After a test is completed, the interface displays results for Phase, Ratio, Error, and Angle. Users can press "Back" to return to the boot interface, "Test" to re-test, or "Save" to store data in the instrument and a U disk. The "Print" button allows printing of the data.
• Turns Ratio Test: On the test completion interface, clicking [Transformation Ratio] allows switching to [Turns Ratio] data, which updates immediately.
• Time Setting: The [Time Setting] option allows users to adjust the year, month, day, hour, minute, and second. An on-screen keyboard facilitates input, with "Del" for deleting, "Esc" for exiting without saving, and "OK" for saving and exiting.
• Data Query: The [Data Query] interface allows users to view and print historical data using [Previous] and [Next] buttons. [Dump] stores current data to a U disk, and [Print] prints current measurement data.
• System Settings: This menu includes options for "Memory Management" (to display "Empty Data" and "Cancel"), "Factory Setting" (password-protected for internal parameters, not for user modification), and "Bluetooth." The Bluetooth function displays a QR code which, when scanned with a mobile phone app, enables full control of the instrument via the mobile phone.

Connecting Method:

• Three-phase transformer Y-d-11, 525/√3±4×2.50%/20: The manual provides a diagram (Diagram 1) for connecting the transformer and high voltage leads.
• Single Phase Transformer, 525/√3±4×2.50%/20: The manual provides a diagram (Diagram 2) for connecting the transformer and high voltage leads.

Notices for Operation:

1. Automatic Error Calculation: When testing transformers with multiple contact points, inputting tap type, rated high, and low voltage allows the instrument to automatically calculate the error and identify the tap point. Once rated data is entered, it doesn't need to be changed for subsequent tap point tests.
2. Equal Division: Also known as division of distance. For transformers like 110±8×1.25%/10.0, 1.25% equals the sub-level.
3. Rated Tapping: For 110±8×1.25%/10.0 transformers, the rated tapping of 8+1 means 9. Entering the rated bit ensures accurate measurement of the tapping position, even if it's not at the intermediate point.
4. Turn Ratio Calculation: For three-phase power samples, the turn ratio is the ratio between high and low voltage winding circle numbers. Specific calculations apply based on star or delta connections for high and low pressure sides (e.g., root 3 times for star high pressure/delta low pressure, or 3 times root variable ratio for delta high pressure/star low pressure).
5. Neutral Point Transformers: For transformers with a neutral point (e.g., YN-d-11), Y-d-11 measurement is theoretically better than YN-d-11 measurement due to potential deviations.
6. On-load Tap Changer: If a transformer has 19 tap changer files and files 9, 10, and 11 have the same value, the instrument input and sub-type should be set to 9.
7. Tap Changer Position Inversion: If the tap changer is on the low voltage side, the displayed split position and actual position may be inverted.
8. Low Voltage Level: If the transformer's low voltage level is insufficient, the high and low voltage values can be multiplied by 10 or 100 as needed.
9. Single Phase Transformer Test: For single-phase transformers, simply select the "Single" measurement option.

Maintenance Features

Instrument Common Problems And Inspection Methods:

If the test results are abnormal, a self-test can be performed using the following method:

1. Wiring for Self-Test: Connect the yellow, green, red, and black high voltage connecting pliers together with the yellow, green, red, and black low voltage connecting pliers. This creates a short connection between the high and low voltage sides.
2. Measurement: Select "y-y-0" or "d-d-0" as the connection mode and start the measurement.
3. Expected Result: If the instrument is functioning normally, the measurement value should be 1.0000.
4. Troubleshooting: If the result is not 1.0000, there is an issue with the instrument. If there is no short connection, the yellow, green, red, and black connecting pliers on the high-voltage side of the test line can also be connected together with the yellow, green, red, and black connecting pliers on the low-voltage side.

After-sale Service:

• Warranty: The product offers free repair or replacement within one year of sale if it has a quality problem.
• Lifetime Technical Support: Huazheng Electric Manufacturing (Baoding) Co., Ltd. provides reparation and technical services for the entire lifespan of the product.
• Contact: Users are encouraged to contact the company for any troubles or abnormal situations to arrange the best solution.

Packing List:

The HZBB-10A Transformer Turns Ratio Tester comes with the following items:

No.	Item	Qty
1	Main engine	1
2	Power line	1
3	Red test line	1
4	Black test line	1
5	Fuse pipe	2
6	Print paper	1
7	Ground lead	1
8	Serial port line	1

Huazheng HZBB-10A Specifications

General

Brand	Huazheng
Model	HZBB-10A
Category	Test Equipment
Language	English