Exhibit with us
*mydirectindustry  
English
  1. Metrology - Laboratory
  2. Metrology and Test Equipment
  3. Tangent delta test system
  4. Wuhan UHV Power Technology Co.,Ltd.
video corpo

Tangent delta test system UHV-341
dissipation factorcapacitance factorfor power transformers

Tangent delta test system - UHV-341 - Wuhan UHV Power Technology Co.,Ltd. - dissipation factor / capacitance factor / for power transformers
Tangent delta test system - UHV-341 - Wuhan UHV Power Technology Co.,Ltd. - dissipation factor / capacitance factor / for power transformers
Add to favorites
Compare this product
Go to the Wuhan UHV Power Technology Co.,Ltd. website for more information

Characteristics

Test type
tangent delta, dissipation factor, capacitance factor
Domain
for power transformers
Applications
for transformers
Configuration
portable, on site
Other characteristics
precision, high-voltage

Description

Product Introduction
  • The UHV-341 Transformer Tan Delta Tester is a portable Tan Delta (dissipation factor) tester for diagnosing moisture-related deterioration and local defects in transformer and electrical-equipment insulation. It is intended for manufacturing, installation, handover and preventive tests on transformers and associated components.

Overview / Capabilities
  • Measures dissipation factor (tgδ) and capacitance (Cx) for transformer insulation and related components; supports simultaneous C1/C2 measurement in CVT self-excitation tests.
  • Supports reverse-wiring low-voltage shielding measurement for CVT bus-grounding scenarios to obtain dielectric loss on 10 kV reverse wiring without removing wiring.
  • Built-in applied-voltage measurement and added CN (auxiliary) measurement functions.
  • Measurement accuracy suitable for oil dielectric-loss testing when used with the standard oil cup and dedicated test leads.
  • Frequency-conversion technology reduces on-site 50 Hz interference for reliable results in strong electromagnetic interference environments.
  • Overcurrent protection prevents instrument damage in case of sample short-circuit or breakdown.
  • Includes a standard capacitor and high-voltage power supply to simplify on-site testing and reduce wiring requirements.
  • Large LCD with menu prompts for intuitive operation (unit displays Chinese-character menu prompts).

Features (as listed) of Transformer Dielectric Loss Tester
  • CVT self-excitation test: single wiring with simultaneous measurement of C1, C2 and tgδ.
  • Reverse-wiring low-voltage shielding to enable C11 measurement under CVT bus grounding without removing wires.
  • Applied-voltage and auxiliary CN measurement capability.
  • Sufficient accuracy for oil dielectric-loss measurement with standard oil cup and special test line.
  • Frequency conversion to eliminate on-site 50 Hz interference for reliable measurements under strong EMI.
  • Overcurrent protection to avoid instrument damage on short-circuit/breakdown.
  • Includes standard capacitor and HV power supply for on-site convenience.
  • Large-screen LCD display and user-friendly menu operation.

Technical Specifications
  • High-voltage output: 0.5 10 kV; 20 steps (increment 500 V per step); capacity: 1500 VA.
  • Accuracy: tgδ: ±(reading × 1% + 0.06%); Cx: ±(reading × 0.5% + 5 pF).
  • Resolution: tgδ: 0.001 %; Cx: 0.001 pF.
  • Measuring range: tgδ: 0.001% < tgδ < 100%.
  • Internal HV capacitance range: 3 pF 60000 pF / 10 kV; 60 pF 1 µF / 0.5 kV.
  • External HV capacitance range: 3 pF 1.5 µF / 10 kV; 60 pF 30 µF / 0.5 kV.
  • Power supply: AC 220 V ±10%, 50/60 ±1 Hz.
  • Measurement methods: single-frequency modes: 45 Hz, 50 Hz, 55 Hz, 60 Hz, 65 Hz; dual-frequency modes: 45/55 Hz, 55/65 Hz, 47.5/52.5 Hz (automatic double-frequency conversion).
  • Harmonic adaptation: ≤ 3%.
  • Operating conditions: ambient temperature -15 ℃ 50 ℃; humidity < 80% (non-condensing).
  • Dimensions (L × W × H): 460 × 345 × 345 mm3.
  • Weight: 35 kg.
  • Alternate names: Dissipation Factor Tester; Transformer Tan Delta Tester.

Working Principle of Transformer Dielectric Loss Tester
  • Under the action of AC voltage, the dielectric will consume some electrical energy, which will be converted into thermal energy and cause losses, known as dielectric loss. When an AC voltage is applied to a dielectric, there exists a phase angle difference between the voltage and current in the dielectric. The residual angle δ of PSI is called the dielectric loss angle, and the tangent tg δ of δ is called the dielectric loss angle tangent. The tg δ value is a parameter used to measure the dielectric loss.
  • The measurement circuit of the tester includes a standard circuit (Cn) and a test circuit (Cx). The standard circuit consists of a built-in high stability standard capacitor and a measurement circuit, while the test circuit consists of the test sample and the measurement circuit. By measuring the amplitude and phase difference of the standard circuit current and the tested circuit current through the measurement circuit, the capacitance value and dielectric loss tangent value of the test sample are obtained through vector operation using a digital real-time acquisition method by a digital signal processor.

Precautions of Transformer Tan Delta Tester
  • 1. Comply with the requirements of the 'Safety Work Regulations for High Voltage Testing'.
  • 2. High voltage testing must be conducted by at least 2 staff members, with 1 person operating and 1 person supervising.
  • 3. The instrument must be reliably grounded.
  • 4. After the test is completed, turn off the power switch. It is strictly prohibited to disassemble and install high-voltage cables while they are live!
  • 5. The instrument is experiencing abnormal phenomena. Turn off the power switch and wait for about a minute before checking again.
  • 6. After the measurement is completed, the power switch must be turned off and wait for about a minute before disconnecting the wire.
  • 7. Instruments should be protected from moisture and severe vibrations.

What Are The Main Tests Used For The Transformer Capacitance & Tan Delta Tester?
  • The Transformer Capacitance & Tan Delta Tester is mainly used to measure the dielectric loss factor (Tan δ) and capacitance (Cx) of electrical equipment, and is widely used for insulation state detection of high-voltage equipment such as transformers, current transformers (CT), voltage transformers (PT/CVT), bushings, lightning arresters, power capacitors, and GIS.

Is The Transformer Capacitance & Tan Delta Tester Suitable For On-site Substation Testing?
  • Yes. The equipment is specifically designed for on-site high-voltage environments and has strong anti-interference capabilities. It can accurately measure in operating substations and high-voltage testing sites without the need to shut down surrounding equipment.

VIDEO

Catalogs

Go to the Wuhan UHV Power Technology Co.,Ltd. website for more information

Other Wuhan UHV Power Technology Co.,Ltd. products

Transformer Tester

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.