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Transformer Turn Ratio Tester Three-Phase Precision Inverter 0.9-10000 for 0-11 Group Vector Diagnostics|XHBB128B

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Transformer Turn Ratio Tester Three-Phase Precision Inverter 0.9-10000 for 0-11 Group Vector Diagnostics|XHBB128B

Resolution : 0.0001

Wiring Group Identification : Automatic 0-11 Group Recognition

Operating Temperature : -10℃ ~ 40℃

Model Number : XHBB128B

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

Certification : CE, ISO

MOQ : 1 Unit

Test Power Supply : Three-Phase Precision Inverter Power

Transformer Types : Standard, Z-Type, Rectifier, Grounding, Furnace, Phase-Shifting, Balance

Brand Name : XZH TEST

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

Place of Origin : Xi'an, Shaanxi, China

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

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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.

Transformer Turn Ratio Tester Three-Phase Precision Inverter 0.9-10000 for 0-11 Group Vector Diagnostics|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.

Product Tags:

Transformer Turn Ratio Tester three-phase

      

Precision Inverter Transformer Tester

      

Vector Diagnostics Transformer Tester

      
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