Ecer asks for your consent to use your personal data to:
Personalised advertising and content, advertising and content measurement, audience research and services development
Store and/or access information on a device
Your personal data will be processed and information from your device (cookies, unique identifiers, and other device data) may be stored by, accessed by and shared with 135 TCF vendor(s) and 65 ad partner(s), or used specifically by this site or app.
Some vendors may process your personal data on the basis of legitimate interest, which you can object to by do not consent. Contact our platform customer service, you can also withdraw your consent.
Your message must
be between 20-3,000 characters!
Submit Requirement
Thank You！
Your requirement has been sent. we will contact you quickly!
{"title":"On-Load Tap Changer Tester Transformer Transition Resistance Analyzer 1.0A for","imgUrl":"https:\/\/img.chinax.com\/nimg\/3f\/38\/89c9c87c3d59263de5bf40d54d22-200x200-1\/on_load_tap_changer_tester_transformer_transition_resistance_analyzer_1_0a_for.jpg","attrs":{"Open Circuit Voltage":"24V","Supported Transformer Types":"YN, Y, Delta (\u25b3)","Operating Temperature":"-10\u2103~50\u2103","Packaging Details":"wooden packaging"}}
{"title":"On-Load Tap Switch Tester Output Current 0.2A Suitable for Various Applications","imgUrl":"https:\/\/img.chinax.com\/nimg\/72\/cd\/bba2efe6a55e592c9f4c31c19d9c-200x200-1\/on_load_tap_switch_tester_output_current_0_2a_suitable_for_various_applications.jpg","attrs":{"Certification":"CE, ISO","Brand Name":"XZH TEST","Model Number":"XHYZ1668","Place of Origin":"Xi'an, Shaanxi, China"}}
{"title":"Portable Sfra Transformer Winding Deformation Tester for Advanced Technology","imgUrl":"https:\/\/img.chinax.com\/nimg\/07\/ec\/923ddd5aff601bad00a4965230ad-200x200-1\/portable_sfra_transformer_winding_deformation_tester_for_advanced_technology.jpg","attrs":{"Brand Name":"XZH TEST","Model Number":"XHBX1501","Certification":"ISO","Place of Origin":"Xi'an, Shaanxi, China"}}
{"title":"Transformer Tester The Best Choice for On-Load Tap-Changer Testing Efficiency","imgUrl":"https:\/\/img.chinax.com\/nimg\/a0\/c0\/f1663de168d8eada7aae45d94e71-200x200-1\/transformer_tester_the_best_choice_for_on_load_tap_changer_testing_efficiency.jpg","attrs":{"Certification":"ISO","Brand Name":"XZH TEST","Model Number":"XHYZ1668A","Place of Origin":"Xi'an, Shaanxi, China"}}
{"title":"Electricity Transformer Low Voltage Short Circuit Impedance Tester with Printer","imgUrl":"https:\/\/img.chinax.com\/nimg\/31\/60\/27d7b4a879f695b2e485c21ddb04-200x200-1\/electricity_transformer_low_voltage_short_circuit_impedance_tester_with_printer.jpg","attrs":{"Certification":"CE, ISO","Brand Name":"XZH TEST","Model Number":"XHZK1620","Place of Origin":"Xi'an, Shaanxi, China"}}
{"title":"Lab Universal Gas Chromatograph High Resolution and Decentralized Detection","imgUrl":"https:\/\/img.chinax.com\/nimg\/46\/e6\/64009e40c4f5c1851c136f92cd75-200x200-1\/lab_universal_gas_chromatograph_high_resolution_and_decentralized_detection.jpg","attrs":{"Certification":"CE\/ISO","Brand Name":"XZH TEST","Model Number":"XHSP1700","Place of Origin":"China"}}
{"title":"Touch LCD Digital Load And No-Load Losses Test Transformer Capacity Tester","imgUrl":"https:\/\/img.chinax.com\/nimg\/4b\/f1\/484beade8377913120e2a54b659d-200x200-1\/touch_lcd_digital_load_and_no_load_losses_test_transformer_capacity_tester.jpg","attrs":{"Brand Name":"XZH TEST","Model Number":"XHTX1318AJ","Place of Origin":"Xi'an, Shaanxi, China","Minimum Order Quantity":"1 unit"}}
On-Load Tap Changer Tester|XHYZ1668Precision Transition Resistance & Waveform Analysis for YN, Y, and Delta Transformer Diagnostics
Product Overview
The XHYZ1668 On-Load Tap Changer (OLTC) Tester is a high-precision diagnostic instrument designed for comprehensive evaluation of transformer on-load tap changers—the only moving component in the transformer circuit connection. Per the requirements of the Power Equipment Commissioning and Preventive Test Regulations, this instrument measures critical OLTC parameters including transition waveform, transition time, instantaneous transition resistance values, and three-phase synchronicity.
Built around an intelligent microcontroller platform with a 7-inch high-brightness LCD and full Chinese/English menu navigation, the XHYZ1668 delivers laboratory-grade analysis in a portable 6.15kg package. It supports both with-winding and without-winding test modes for YN, Y, and Delta transformer configurations, with direct resistance display that eliminates the need for manual conversion. The 20kHz sampling rate captures fine waveform details, while the built-in high-speed thermal printer, 500-group storage, and RS232/USB interfaces enable complete on-site documentation and data export.
Key Features
Three-Mode Current Output: Selectable 1.0A, 0.5A, and 0.2A test currents to optimize measurement accuracy across different resistance ranges
Wide Resistance Range: Covers 0.3Ω~100Ω across three current ranges with direct readout—no manual calculation required for YN, Y, or Delta configurations
Dual Test Modes: Supports both with-winding testing (on installed transformers) and without-winding testing (bench-top switch evaluation) for maximum flexibility
High-Speed 20kHz Sampling: Captures fine waveform details with transition time measurement accuracy of ±(0.1%+0.2ms)
Auto-Scaling Waveform Display: Automatically adjusts resistance and time axis scaling based on sampled values for optimal waveform visualization
7-Inch High-Brightness LCD: Large, clear display for comfortable field operation with intuitive touch-panel parameter configuration
500-Group Data Storage: Internal memory with waveform storage for comprehensive test documentation and trend analysis
RS232 & USB Connectivity: Dual data interfaces for computer communication, firmware updates, and digital report generation
Built-in High-Speed Printer: Immediate on-site waveform and data printing for complete test documentation
Comprehensive Protection: Refined protection circuits, 2-minute automatic current output timer, and robust anti-interference design for reliable field performance
Technical Specifications
Measurement Performance
Output Current
1.0A, 0.5A, 0.2A (Selectable)
Transition Resistance (1.0A)
0.3Ω ~ 20Ω
Transition Resistance (0.5A)
5Ω ~ 40Ω
Transition Resistance (0.2A)
20Ω ~ 100Ω
Transition Time
0 ~ 320ms
Open Circuit Voltage
24V
Resistance Accuracy
±(5% Reading ±0.1Ω)
Time Accuracy
±(0.1% Reading ±0.2ms)
Sampling Rate
20kHz
Testing Configuration
Transformer Types
YN, Y, Delta (Δ) with/without winding
Tap Positions
00-95 Configurable
Tap-Changing Direction
Up / Down Selectable
Measurement Phases
Single-Phase / Three-Phase
Trigger Sensitivity
Adjustable Trigger Resistance Threshold
Waveform Filter
0-60 Level Adjustable Digital Filter
Interface & Data
Display
7-inch High-Brightness LCD
Storage
500 Groups Internal Memory
Data Interfaces
RS232 Serial + USB
Printer
Built-in High-Speed Thermal Printer
Operating Specifications
Power Supply
AC 220V±10%, 50±1Hz
Operating Temperature
-10℃ ~ 50℃
Operating Humidity
≤85%RH
Physical Specifications
Dimensions (Main Unit)
360 × 290 × 170mm
Dimensions (Cable Case)
360 × 290 × 170mm
Weight (Main Unit)
6.15kg
Weight (Cable Case)
4.55kg
Frequently Asked Questions
Q1: What parameters does the XHYZ1668 measure and why are they critical for transformer maintenance?
The XHYZ1668 measures transition resistance, transition time, three-phase synchronicity, and generates complete switching waveforms for on-load tap changers. These parameters are critical because the OLTC is the only moving component in a transformer's circuit connection. Degraded transition resistors, worn contacts, sluggish mechanism timing, or poor phase synchronicity can lead to arcing, coking, and catastrophic transformer failure. Regular OLTC testing per preventive maintenance schedules identifies degradation before it causes unplanned outages.
Q2: What is the difference between with-winding and without-winding test modes?
With-winding testing is performed on installed transformers with the windings connected, measuring the OLTC in its actual operating configuration. The non-test windings (typically medium and low voltage sides) must be three-phase short-circuited and grounded. Without-winding testing disconnects the windings and tests the tap changer mechanism directly—this mode produces faster transition times (by approximately 3-7ms) and is ideal for bench-top switch evaluation during manufacturing or refurbishment. The XHYZ1668 supports both modes with automatic parameter adjustment.
Q3: How does the XHYZ1668 handle different transformer winding configurations?
The XHYZ1668 directly supports YN (star with neutral), Y (star without neutral), and Delta configurations without requiring manual resistance value conversion. For YN configurations, all three phases and neutral are connected for simultaneous measurement. For Y configurations where the neutral is not accessible, the instrument supports two-phase sequential measurement with automatic conversion (R=1/3R'). For Delta configurations, the instrument similarly handles two-phase measurement with conversion (R=R' for two-phase, R=2/3R' for single-phase). Real-time wiring diagrams are displayed on the 7-inch screen for setup guidance.
Q4: How does the waveform analysis help identify specific OLTC fault types?
The XHYZ1668 captures waveforms at 20kHz, enabling fine-detail analysis of switching behavior. Common fault signatures include: extended bridging time (indicating mechanism spring fatigue or sluggish operation), asymmetrical zero-crossing segments (broken transition resistors—resistance reads >50Ω), oscillation patterns (excessive trigger sensitivity in decreasing inductance direction), and irregular or noisy waveforms (loose/broken flexible connections or partial short-circuits). The auto-scaling display and manual cursor-based measurement mode allow operators to precisely identify fault types and quantify severity directly on-site.
Q5: What are the MOQ, warranty terms, and included accessories for the XHYZ1668?
The minimum order quantity is 1 unit, with payment via T/T or L/C. Standard delivery is 5-10 working days in two protective aluminum alloy carrying cases (main unit: 6.15kg, cable case: 4.55kg). Each unit includes the main instrument, one complete test cable set (A/B/C/N), power cord, ground cable, 2 spare fuses, 1 roll of thermal printer paper, and a comprehensive user manual. Annual supply capacity reaches 500 units. Each instrument includes a 12-month comprehensive warranty with lifetime technical support. OEM/ODM configurations are available upon request. For volume pricing or technical consultation, please contact our sales team.
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...
