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Portable TTR Tester with Reverse Connection Protection

Name: Portable TTR Tester with Reverse Connection Protection
Brand: Xi'an Xu&Hui Electromechanical Technology Co., Ltd.
SKU: XHBB128B
Price: 4,115.00 USD
Availability: InStock

Product Details:

Place of Origin:	Xi'an Shaanxi China
Brand Name:	XZH TEST
Certification:	ISO CE
Model Number:	XHBB128B

Detail Information

Place of Origin:

Xi'an Shaanxi China

Brand Name:

XZH TEST

Certification:

ISO CE

Model Number:

XHBB128B

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Highlight:

High and Low Voltage Reverse Connection Protection Transformer Turns Ratio Tester

Accurate Ratio Measurement TTR Tester

Portable Design Transformer Ratio Tester

Trading Information

Minimum Order Quantity:

1set

Packaging Details:

wooden packaging

Delivery Time:

5-8 work days

Payment Terms:

T/T

Supply Ability:

3000unit/year

Product Description

XHBB128B Transformer Turns Ratio Tester (TTR) is a high-precision, three-phase diagnostic instrument designed for fast, accurate measurement of power transformer turns ratio and voltage ratio. Transformer turns ratio testing is a critical requirement across multiple scenarios: during manufacturing QC, prior to new transformer commissioning, and in accordance with power industry preventive test procedures. The instrument validates turns ratio accuracy, assesses tap changer performance, detects inter-turn short circuits, and confirms parallel operation compatibility. Powered by a proprietary three-phase precision inverter supply — not single-phase mains — the XHBB128B eliminates grid harmonic interference for superior measurement integrity. Its 7-inch color touchscreen LCD, comprehensive protection suite, and rugged field-ready enclosure make it the definitive TTR solution for production lines, field commissioning, and routine maintenance.

Technical Specifications

Parameter	Specification
Measurement
Test Range	0.9 – 10000
Accuracy (0.9–500)	±0.1% + 2 digits
Accuracy (501–2000)	±0.2% + 2 digits
Accuracy (2001–10000)	±0.5% + 2 digits
Resolution	0.0001 minimum
Output Voltage	Auto-adjusts according to load
Power & Environment
Working Power Supply	AC 220V ± 10%, 50 ± 1 Hz
Ambient Temperature	-10℃ to +40℃
Relative Humidity	≤ 85%, no condensation
Physical
Dimensions (Main Unit)	360 × 290 × 170 mm
Dimensions (Cable Box)	360 × 290 × 170 mm
Weight (Main Unit)	5.9 kg
Weight (Cable Box)	5.65 kg

Key Performance Features

Three-Phase Precision Inverter Power Supply — Proprietary three-phase inverter replaces conventional single-phase mains supply as the measurement voltage source, completely eliminating grid harmonic interference for more accurate results. Measurement accuracy is unaffected even when operating from generator power.
Simultaneous Three-Phase Measurement — Three-phase output accelerates test speed, measures inter-phase angles, and automatically identifies transformer connection groups 0–11, eliminating the phase-by-phase manual testing required by traditional ratio bridges.
Comprehensive Transformer Compatibility — Supports a uniquely wide range of transformer types including Z-type, rectifier, grounding, electric furnace, phase-shifting, and balance transformers — providing the most complete measurement parameter coverage in its class.
Multi-Layer Protection System — Integrated high/low voltage reverse connection protection, transformer turn-to-turn short circuit protection, tap changer open/close failure protection, and output full short circuit protection ensure instrument and operator safety under all fault conditions.
Automatic Tap Changer Analysis — After inputting rated parameters, automatically measures ratio, error value, and tap changer position for up to 99 tapping points. Accurately identifies asymmetric tapping positions that conventional testers cannot resolve.
7-Inch HD Color Touchscreen — Large LCD with modular display and step-by-step Chinese/English operational prompts enables intuitive, manual-free operation. Each function is accessible with a single touch.
Integrated Data Management — Built-in thermal printer, USB flash disk interface, and RS232 serial port provide flexible data output options for immediate documentation, digital archiving, and paperless office integration.
Rugged Field-Ready Enclosure — Multi-function engineering plastic case with cold/temperature resistance, waterproof sealing, and drop/shock resistance ensures reliable operation and transport in demanding field environments.

Instrument Panel Overview

Component	Function
7-Inch Touchscreen LCD	Color touch display with digital backlight adjustment; shows operation menu and test results
High Voltage Terminals	Yellow, Green, Red, Black — connect to phases A, B, C and neutral (O) on transformer HV side
Low Voltage Terminals	Yellow, Green, Red, Black — connect to phases a, b, c and neutral (o) on transformer LV side
AC220V Power Input	Power input for the instrument, connect to AC220V mains supply
Protective Ground	Reliable grounding terminal for operator safety
RS232 / USB Ports	Serial communication and USB storage for data export
Built-in Printer	Prints test results immediately after measurement completion

Product Image

XHBB128B

Self-Test Verification

If test results appear abnormal, the instrument can be verified using the following self-test procedure:

Connect the high-voltage yellow/green/red/black clips together, and similarly short the low-voltage yellow/green/red/black clips. Select Y-Y-0 or D-D-0 as the connection mode and press OK to start measurement. A normal instrument will display 1.0000. Any other reading indicates a potential instrument issue requiring service.

Alternatively, the high-voltage and low-voltage test line clamps can be shorted together (ensure wired ends are reliably connected).

Frequently Asked Questions

Q1: Is this TTR tester suitable for transformer production line quality control?

Yes, the XHBB128B is purpose-built for manufacturing QC environments. Its simultaneous three-phase measurement dramatically accelerates testing throughput compared to traditional phase-by-phase ratio bridges, enabling 100% testing on production lines without creating bottlenecks. The ±0.1% accuracy class (0.9–500 range) meets factory acceptance testing standards, while automatic tap changer position identification (up to 99 points) verifies correct tap changer assembly without manual calculation. The USB flash disk interface allows rapid data export for integration with manufacturing execution systems (MES) and QC databases.

Q2: Can field commissioning engineers use this for new transformer installation verification?

Absolutely. Before a new transformer is energized, commissioning engineers must verify that turns ratios across all tap positions match the nameplate and that the connection group is correct. The XHBB128B automates this entire workflow: it simultaneously measures all three phases, auto-identifies the connection group (0–11), calculates error values at each tap position, and prints a complete commissioning report. The reverse connection protection and output short circuit protection provide an essential safety layer during commissioning when wiring errors are most likely. The rugged waterproof enclosure and 5.9 kg main unit weight make it practical for multi-site commissioning schedules.

Q3: How does it serve electrical preventive maintenance service contractors?

Preventive maintenance contractors servicing multiple industrial, commercial, and utility clients need instruments that are fast, reliable, and produce auditable documentation. The XHBB128B’s three-phase simultaneous measurement minimizes testing time at each client site, while the built-in printer generates immediate hard-copy reports for client sign-off. Its ability to test the full range of transformer types — including Z-type, rectifier, and phase-shifting transformers — means a single instrument serves all clients regardless of their transformer fleet composition. The three-phase inverter power supply ensures measurement integrity even when operating from portable generators at remote sites.

Q4: Is it appropriate for transformer tap changer maintenance specialists?

Tap changer maintenance requires precise verification that each tap position delivers the correct voltage ratio. The XHBB128B excels here with its automatic tap changer analysis capability: simply input the rated parameters once, and the instrument automatically measures ratio and error values at each of up to 99 tap positions, accurately identifying the actual tap position even for asymmetric tapping configurations. This is invaluable when diagnosing tap changer malfunctions — such as missed positions, bridging failures, or mechanical misalignment — that may not be detectable through electrical testing alone.

Q5: Can power quality and grid compliance auditors use this for regulatory verification?

Grid compliance auditors verifying that distribution transformers meet voltage regulation standards need precise ratio measurements that can withstand scrutiny. The XHBB128B’s three-phase inverter supply eliminates mains harmonic interference that can compromise measurement accuracy on traditional single-phase testers, delivering ±0.1% accuracy that meets or exceeds regulatory testing requirements. The USB data export enables seamless integration with compliance databases and automated report generation, while the instrument’s self-test verification procedure provides documented measurement confidence that auditors can reference in their reports.

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Portable TTR Tester with Reverse Connection Protection

High Light

Highlight:

High and Low Voltage Reverse Connection Protection Transformer Turns Ratio Tester

Accurate Ratio Measurement TTR Tester

Portable Design Transformer Ratio Tester

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