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Новости о компании On-Load Tap Changer(OLTC)- the "specialist doctor" for electrical equipment

On-Load Tap Changer(OLTC)- the "specialist doctor" for electrical equipment

2025-12-08

The transformer on-load tap changer tester is a specialized diagnostic instrument specifically designed for the transformer on-load tap changer (OLTC)—the only mechanical component in a transformer that frequently operates under load and is also one of the components with the highest failure rate. Its main applications include:

Periodic preventative testing;
Post-fault diagnosis;
Verification before and after maintenance;
Acceptance testing before commissioning new equipment;
Special inspections before important power supply protection.

I.Core Testing Principles and Technologies (How to "Diagnose" the Problem)

The tester collects electrical and mechanical signals when the switch operates and converts them into visualized waveforms and data, thereby providing insight into its internal state.

Testing Items:	Measurement Principle	Typical problems that can be detected include:
1. Transition Waveform Analysis (Core)	Measure the transition resistance and contact voltage/current waveforms during the switching process.	Contact erosion and poor contact; abnormal transition resistance; and switching program errors (such as double breaks and bridging time).
2. Motion Timing Measurement	Record the time points and sequence of contact opening and closing.	Mechanical jamming and wear of the transmission mechanism; spring fatigue; and drive motor failure.
3. Dynamic Resistance Measurement (DRM)	Measure the change in contact resistance of the main current-carrying contact throughout the entire operation.	Core defects such as main contact burnout and insufficient contact pressure are highly sensitive.
4. Vibration and Acoustic Analysis (Advanced Function)	Capture the mechanical vibration signal during operation using a high-frequency vibration sensor.	Purely mechanical faults such as internal loosening, component deformation, and lack of lubrication are important supplements to electrical testing.

II.Core Values and Problems Solved

Value level	Specific benefits include:
Security	Preventing catastrophic failures: Early detection of contact welding, insulation deterioration, and explosion risks to avoid transformer damage and power grid accidents.
Economic aspects	Cost reduction and efficiency improvement: Reducing unnecessary power outages: Shifting from "periodic inspections" to "condition-based maintenance," performing major overhauls only when necessary. Saving on operation and maintenance costs: Reducing manpower, hoisting, and downtime losses. Extending equipment lifespan: Scientific maintenance, avoiding over- or under-maintenance.
Operations and maintenance level	Enhancing intelligence: Precise diagnosis: Quickly locating the phase, location, and type of fault. Quality control: Verifying whether the quality after major overhauls or installations meets standards. Full lifecycle management: Establishing equipment health records to achieve trend prediction and intelligent decision-making.

ZXYZ-2012 Advantages (Specific Parameters):

High Measurement Accuracy: Transition resistance accuracy ±(5% reading ±0.1Ω), transition time accuracy ±(0.5% reading ±0.2ms).
Comprehensive Performance: Sampling rate up to 30kHz, resistance resolution 0.1Ω, time resolution 0.1ms, waveform recording 300ms.
Strong Storage and Expansion Capabilities: Automatically stores 1000 sets of data and supports saving to an external USB flash drive and generating Word reports.

ZXYZ-2013A Advantages

Multiple Output Ranges and Wide Measurement Coverage: Provides four output current ranges: 2.0A, 1.0A, 0.5A, and 0.2A, corresponding to a transition resistance measurement range from 0.3Ω (2.0A range) to 100Ω (0.2A range).
Outstanding Time Measurement Accuracy: Transition time measurement accuracy reaches ±(0.1% reading ±0.2ms).
Portable and practical: The main unit weighs only 6kg, comes standard with a 13-meter test cable (customizable), and is equipped with a 7-inch large screen, making it suitable for on-site operations.

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Контакты: Mrs. Annie

Телефон: 86--17362949750

Факс: 86-27-65526007

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испытательное оборудование пробы на разрядку обязанности батареи

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высоковольтное испытательное оборудование

Высоковольтная резонирующая испытательная система

Оборудование для испытаний трансформатора

Калибратор электропитания

Оборудование для испытаний масла трансформатора

Подземный локатор расстояния повреждения кабеля

Метр контактного сопротивления

Анализатор автомата защити цепи

Газоанализатор СФ6

Тестер предохранения от реле

Тестер изоляции земли

Анализатор КТ ПТ

Анализатор качества силы

Испытательное оборудование Аррестер молнии

испытательное оборудование пробы на разрядку обязанности батареи

Тестер электрического тока

On-Load Tap Changer(OLTC)- the "specialist doctor" for electrical equipment

Новости

Случаи

высоковольтное испытательное оборудование

Высоковольтная резонирующая испытательная система

Оборудование для испытаний трансформатора

Калибратор электропитания

Оборудование для испытаний масла трансформатора

Подземный локатор расстояния повреждения кабеля