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Transformer Turn Ratio Tester Three-Phase Precision Inverter 0.9-10000 for 0-11

China Transformer Turn Ratio Tester Three-Phase Precision Inverter 0.9-10000 for 0-11

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Transformer Turn Ratio Tester Three-Phase Precision Inverter 0.9-10000 for 0-11

MOQ： 1 Unit
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Resolution	0.0001
Wiring Group Identification	Automatic 0-11 Group Recognition
Operating Temperature	-10℃ ~ 40℃
Accuracy (0.9-500)	±0.1% + 2 Words
Operating Humidity	≤85%, Non-condensing
Output Voltage	Auto-Adjust Based on Load
Data Interfaces	USB Flash Drive + RS232
Test Power Supply	Three-Phase Precision Inverter Power
Transformer Types	Standard, Z-Type, Rectifier, Grounding, Furnace, Phase-Shifting, Balance
Test Range	0.9 ~ 10,000
Dimensions (Main Unit)	360 × 290 × 170mm
Display	7-inch HD Color Touch Screen LCD
Protection Features	High/Low Voltage Reverse, Turn Short Circuit, Tap Changer Open/Close Failure, Output Full Short Circuit
Power Supply	AC 220V±10%, 50±1Hz
Printer	Built-in Thermal Printer
Delivery Time	5-10 Working Days
Dimensions (Cable Case)	360 × 290 × 170mm
Accuracy (501-2000)	±0.2% + 2 Words
Accuracy (2001-10000)	±0.5% + 2 Words
Weight (Main Unit)	5.9kg
Weight (Cable Case)	5.65kg
Payment Terms	T/T,L/C
Max Tap Changer Positions	99 Taps
Packaging Details	Multi-functional engineering plastic case (cold/temperature resistant, sealed waterproof, shock resistant)
Supply Ability	500 Units per Year
Model Number	XHBB128B
Certification	CE, ISO
Brand Name	XZH TEST
Place of Origin	Xi'an, Shaanxi, China

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Product Specification


Resolution	0.0001	Wiring Group Identification	Automatic 0-11 Group Recognition
Operating Temperature	-10℃ ~ 40℃	Accuracy (0.9-500)	±0.1% + 2 Words
Operating Humidity	≤85%, Non-condensing	Output Voltage	Auto-Adjust Based on Load
Data Interfaces	USB Flash Drive + RS232	Test Power Supply	Three-Phase Precision Inverter Power
Transformer Types	Standard, Z-Type, Rectifier, Grounding, Furnace, Phase-Shifting, Balance	Test Range	0.9 ~ 10,000
Dimensions (Main Unit)	360 × 290 × 170mm	Display	7-inch HD Color Touch Screen LCD
Protection Features	High/Low Voltage Reverse, Turn Short Circuit, Tap Changer Open/Close Failure, Output Full Short Circuit	Power Supply	AC 220V±10%, 50±1Hz
Printer	Built-in Thermal Printer	Delivery Time	5-10 Working Days
Dimensions (Cable Case)	360 × 290 × 170mm	Accuracy (501-2000)	±0.2% + 2 Words
Accuracy (2001-10000)	±0.5% + 2 Words	Weight (Main Unit)	5.9kg
Weight (Cable Case)	5.65kg	Payment Terms	T/T,L/C
Max Tap Changer Positions	99 Taps	Packaging Details	Multi-functional engineering plastic case (cold/temperature resistant, sealed waterproof, shock resistant)
Supply Ability	500 Units per Year	Model Number	XHBB128B
Certification	CE, ISO	Brand Name	XZH TEST
Place of Origin	Xi'an, Shaanxi, China
High Light	Transformer Turn Ratio Tester three-phase ，Precision Inverter Transformer Tester ，Vector Diagnostics Transformer Tester

Transformer Turn Ratio Tester|XHBB128B

Product Overview

The XHBB128B Transformer Turn Ratio Tester replaces traditional single-phase bridge methods with a precision three-phase inverter power supply, delivering faster, more accurate, and more comprehensive transformer ratio analysis. Unlike conventional testers that rely on mains power and measure phase-by-phase, the XHBB128B generates its own clean three-phase test voltage—eliminating harmonic interference and enabling simultaneous three-phase measurement with automatic vector group identification (0-11). From standard distribution transformers to specialized Z-type, rectifier, furnace, grounding, and phase-shifting transformers, the instrument handles the industry's widest variety of winding configurations.

Featuring a 7-inch high-definition color touch screen LCD with step-by-step Chinese prompts, the XHBB128B requires no instruction manual during field operation. After inputting transformer rated parameters, it automatically measures turn ratio, voltage ratio, ratio error, and tap changer position for up to 99 taps—including asymmetric tap changers. Comprehensive protection features (reverse connection, turn short circuit, tap changer failure, full output short circuit) ensure reliable operation in demanding field environments, while USB, RS232, and built-in printer interfaces support paperless data management.

XHBB128B

Key Features

Three-Phase Precision Inverter Power: Generates clean test voltage internally, eliminating harmonic interference from unstable mains power and ensuring consistent accuracy even when powered by generators
Simultaneous Three-Phase Measurement: Measures all three phases in a single test cycle with automatic wiring group identification (0-11), dramatically faster than phase-by-phase bridge methods
Wide Ratio Range 0.9-10,000: Three accuracy grades up to ±0.1%+2 words, suitable for transformers from small instrument types to large power units
99-Tap Changer Support: Automatically identifies exact tap position including asymmetric tap changers after rated parameter input, eliminating manual position recording
Universal Transformer Compatibility: Supports Z-type, rectifier, grounding, electric furnace, phase-shifting, and balance transformers—far beyond standard power and distribution types
7-Inch HD Color Touch LCD: Modular display with step-by-step Chinese prompts—complete operation without referencing the user manual
Comprehensive Protection Suite: High/low voltage reverse connection, turn-to-turn short circuit, tap changer open/close failure, and output full short circuit protection
USB + RS232 + Printer: Triple data output with USB flash drive storage, serial communication, and built-in thermal printer for flexible data management
Automatic Error Calculation: Input rated data once—the instrument computes ratio error and tap position for every subsequent measurement automatically
Rugged Field Case: Multi-functional engineering plastic case with cold/temperature resistance, sealed waterproofing, and drop/shock protection

Technical Specifications

Measurement Performance
Test Range	0.9 ~ 10,000
Accuracy (0.9-500)	±0.1% + 2 Words
Accuracy (501-2000)	±0.2% + 2 Words
Accuracy (2001-10000)	±0.5% + 2 Words
Resolution	0.0001
Output Voltage	Auto-Adjust Based on Connected Load
Testing Capabilities
Measurement Modes	Three-Phase, Single-Phase, Z-Type Transformer
Wiring Group Identification	Automatic 0-11 Recognition
Max Tap Changer Positions	99 Taps (Including Asymmetric)
Compatible Transformers	Standard, Z-Type, Rectifier, Grounding, Furnace, Phase-Shifting, Balance
Test Power Source	Built-in Three-Phase Precision Inverter
Interface & Data
Display	7-inch HD Color Touch Screen LCD
Data Storage	USB Flash Drive + Internal Memory
Data Interfaces	USB + RS232 Serial
Printer	Built-in Thermal Printer
Operating Specifications
Working Power	AC 220V±10%, 50±1Hz
Operating Temperature	-10℃ ~ 40℃
Operating Humidity	≤85%, Non-condensing
Protection	Reverse, Short Circuit, Tap Failure, Full Output Short
Physical Specifications
Dimensions (Main Unit)	360 × 290 × 170mm
Dimensions (Cable Case)	360 × 290 × 170mm
Weight (Main Unit)	5.9kg
Weight (Cable Case)	5.65kg

Frequently Asked Questions

Q1: How does the three-phase inverter power supply improve measurement accuracy over traditional testers?

Traditional turn ratio testers use mains power as the measurement voltage source, making them susceptible to harmonic distortion, voltage fluctuations, and frequency variations that degrade accuracy—especially when operating from generators at field sites. The XHBB128B generates its own clean three-phase test voltage through a precision inverter circuit, completely isolating the measurement from mains power quality. This eliminates harmonic interference, ensures consistent accuracy across all testing environments (including generator-powered sites), and enables simultaneous three-phase measurement with automatic vector group identification.

Q2: What transformer types can the XHBB128B test beyond standard distribution transformers?

The XHBB128B supports the most comprehensive range of transformer types in its class: standard three-phase and single-phase transformers, Z-type (zigzag) transformers, rectifier transformers, grounding transformers, electric furnace transformers, phase-shifting transformers, and balance transformers. The instrument automatically compensates for the unique winding characteristics of each type and includes specialized measurement modes for three-phase, single-phase, and Z-type configurations. This versatility makes it suitable for transformer manufacturers, power utility maintenance depots, and industrial facilities with diverse transformer fleets.

Q3: How does the automatic tap changer position identification work?

After entering the rated high-voltage, rated low-voltage, equal tapping level (step percentage), and tapping type (total number of positions) for the transformer under test—once—the XHBB128B automatically calculates the ratio error and identifies the exact tap changer position for every subsequent measurement. For asymmetric tap changers where the rated tap is not at the midpoint, the instrument correctly identifies positions without error. It supports up to 99 tap positions, and for on-load tap changers where positions 9, 10, and 11 share the same value, entering 9 as the tapping type ensures correct position reporting across the full range.

Q4: What protection features ensure reliable field operation?

The XHBB128B incorporates four dedicated protection circuits: high/low voltage reverse connection protection prevents damage from incorrect test lead attachment, turn-to-turn short circuit protection safeguards both the instrument and transformer during winding faults, tap changer open/close failure protection detects mechanical issues, and output full short circuit protection handles accidental cable faults. These protections, combined with the rugged cold/heat-resistant, waterproof, and shock-resistant engineering plastic carrying case, ensure reliable operation in demanding substation and manufacturing floor environments.

Q5: What are the MOQ, warranty terms, and included accessories for the XHBB128B?

The minimum order quantity is 1 unit, with payment via T/T or L/C. Standard delivery is 5-10 working days in a multi-functional engineering plastic case. Each XHBB128B includes the main test unit, complete four-wire test lead set (high and low voltage sides), power cord, RS232 serial cable, ground wire, 2 spare fuses (1A), thermal printer paper roll, and comprehensive user manual. The instrument carries a 12-month warranty covering manufacturing defects with lifetime technical support. Annual supply capacity reaches 500 units. For volume pricing or technical consultation, please contact our sales team.

Company Details

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Business Type:

Manufacturer 
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Year Established:

2013 
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Total Annual:

1000000-5000000
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Employee Number:

50~100 
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Ecer Certification：

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Xi'an Xu&Hui Electromechanical Technology Co., Ltd. /Xian XZH Electric Power Technology Co., Ltd. Has found in 2013, located in Xi'an, China. which is a highly experienced team dedicated to developing electrical... Xi'an Xu&Hui Electromechanical Technology Co., Ltd. /Xian XZH Electric Power Technology Co., Ltd. Has found in 2013, located in Xi'an, China. which is a highly experienced team dedicated to developing electrical...

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Xi'an Xu&Hui Electromechanical Technology Co., Ltd.
Building B8-01, Phase I, Ronghao Industrial City, No. 2098, Weiyang 9th Road, Gaoling District, Xi'an, China
https://www.xzhtest.com/

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