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XHYZ1668A On-Load Tap-Changer Tester is a professional-grade diagnostic instrument engineered for comprehensive evaluation of transformer on-load tap-changers (OLTC). Equipped with advanced intelligent functions and a complete English menu system, this instrument enables on-site personnel to master its operation quickly without specialized training. Its compact structure, lightweight build, and excellent anti-interference performance effectively reduce physical burden during field testing. Widely recognized as an optimal choice for power generation and distribution enterprises and transformer manufacturing sectors, this device plays a critical role in safeguarding safe production and elevating product quality standards.
Technical Specifications
Parameter
Specification
Output Current
1.0A / 0.5A / 0.2A (Selectable)
Transition Resistance Range
0.3Ω–20Ω (1.0A) | 5Ω–40Ω (0.5A) | 20Ω–100Ω (0.2A)
Transition Time Range
0–320 ms
Open Circuit Voltage
24V
Resistance Accuracy
±(5% of reading ± 0.1Ω)
Time Accuracy
±(0.1% of reading ± 0.2ms)
Sampling Rate
20 kHz
Storage Capacity
500 sets of data (built-in)
Display
7-inch high-brightness LCD
Dimensions (Main Unit)
360 * 290 * 170 mm
Dimensions (Cable Box)
360 * 290 * 170 mm
Weight (Main Unit)
6.15 kg
Weight (Cable Box)
4.55 kg
Test Cable Length
Standard 13 m (customizable)
Operating Conditions
Parameter
Specification
Ambient Temperature
-10℃ to +50℃
Relative Humidity
≤ 85% RH
Working Power Supply
AC 220V ± 10%
Power Frequency
50 ± 1 Hz
Key Performance Features
High Output Current, Lightweight Design — Delivers up to 1.0A test current in a portable form factor, minimizing field workload.
Direct Readout Without Conversion — Test YN, Y, and Δ type transformers with resistance values displayed directly; no manual calculation required.
Dual Testing Modes — Supports both with-winding and without-winding measurement, adapting to various field scenarios.
Adaptive Waveform Display — Automatically adjusts resistance, time, and amplitude axes based on sampled values for optimal visualization.
Comprehensive Protection Circuit — Built-in safeguards ensure reliable operation under demanding field conditions.
7-Inch Large LCD — High-brightness display for clear waveform analysis even in outdoor environments.
Built-in Lithium Battery (Optional) — Operates without external AC power for maximum portability.
500-Set Internal Storage — Automatic data logging with quick retrieval and on-site thermal printing.
Product Image
Frequently Asked Questions
Q1: Is this tester suitable for railway traction transformer maintenance?
Absolutely. The XHYZ1668A is well-suited for railway electrification systems where traction transformers undergo frequent tap changes under heavy load cycles. Its 20kHz sampling rate captures fast switching transients with high fidelity, and the rugged portable design withstands the demanding trackside environment. The 500-set internal storage enables systematic condition monitoring across substations along the rail corridor.
Q2: Can this device be used for backup power transformers in data centers?
Yes. Data center UPS and power distribution transformers require regular OLTC diagnostics to ensure failover reliability. The XHYZ1668A provides precise transition time and resistance measurements with automatic waveform analysis, making it an ideal tool for data center electrical maintenance teams who need documented, repeatable test results for compliance reporting.
Q3: How does it perform in wind farm and solar plant substation testing?
Renewable energy substations present unique challenges due to variable load profiles and often remote locations. The XHYZ1668A excels here with its wide operating temperature range (-10℃ to +50℃), optional built-in lithium battery for off-grid operation, and anti-interference design that maintains accuracy despite the electromagnetic noise common in inverter-dense environments.
Q4: Is it rugged enough for mining and heavy industrial power systems?
The XHYZ1668A is designed for harsh industrial environments. With a reinforced chassis, fan-cooled enclosure, and comprehensive protection circuitry, it handles the dust, vibration, and temperature extremes typical of mining operations. The 7-inch LCD remains clearly visible even in poorly lit underground substations, and the direct resistance readout eliminates manual calculation errors during time-sensitive maintenance windows.
Q5: Can this tester be deployed on marine vessels and offshore platforms?
Marine and offshore electrical systems demand exceptional reliability given the corrosive saltwater environment and limited access for repairs. The XHYZ1668A features robust construction and a complete protection circuit that ensure stable operation at sea. Its compact 360*290*170 mm footprint fits easily in shipboard electrical rooms, and the built-in thermal printer generates immediate hard-copy reports — eliminating the need for onboard PC connectivity in confined marine workspaces.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2013
Total Annual:
1000000-5000000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
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...
