Transformer test bench UHV-315

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Overview
The UHV-315 Transformer Test Bench is a dedicated test station for electrical testing of power and distribution transformers, providing a complete set of standard measurements and options for system expansion via external CT interfaces.

Functional applications

• No-load and load characteristic tests for power and distribution transformers
• DC resistance measurement of windings
• Turns ratio (TTR) and winding group verification
• Power-frequency withstand voltage (AC withstand) tests
• External CT interface and reserved transformer ports for capacity expansion

Measurement technology

• Measurement module fully controlled by an MCU implementing synchronous sampling
• Automatic processing of sampled data to eliminate manual calculation errors
• Real-time digital display of measured results

Product characteristics

• Large backlit LCD with an intuitive, menu-based user interface
• Supports a complete range of transformer tests up to 2500 kVA, including DC resistance, turns ratio, no-load/load loss measurement and AC withstand tests
• Direct digital/analog presentation of voltage, current and power parameters and on-site printing of test reports
• Audible and visual overcurrent alarms during withstand tests and programmable timing for automated test sequences
• Designed for expansion via external CT interface and reserved external transformer ports

Technical specifications

• Model: UHV-315
• Applicable standards: GB/T4776, GB/T5169, GB/4285-1993 (and related national standards)
• Supported tests: no-load/load characteristics, DC resistance, turns ratio, winding group, power-frequency withstand voltage
• Maximum tested transformer capacity: up to 2500 kVA
• Measurement control: MCU-based synchronous sampling with automatic data processing
• Display: large backlit LCD with real-time digital results
• Output/interface: external CT interface and reserved external transformer ports
• Safety/control: audible/visual overcurrent alarms and programmable timing
• Reporting: on-site printing capability for measured parameters and derived results

Product Parameters
Project Measurement range Relative error
Voltage 0.1-600V ± (0.2% reading+0.1% range)
Current 0.1-200A ± (0.2% reading+0.1% range)
Power U * I ± (0.2% reading+0.1% range)
Power factor 0.1-0.9999 ± 3 words
Power supply AC220V ± 10% 50Hz ± 2%
Usage environment Working temperature range: 0-40 ℃, relative humidity: 30% -90%
Volume 2500 ╳ 1060 ╳ 1500 (mm)
Weight 100kg~1000kg (varies according to customization requirements)

Application field

• The transformer comprehensive testing platform is widely used in substations, power plants, and transformer manufacturing enterprises in the power system. For example, in a substation, it can be used to regularly check the working status of transformers to ensure their normal operation; In transformer manufacturing enterprises, it is used for quality inspection before leaving the factory to ensure the reliability of the product.

practical case

• A large power plant has introduced an advanced transformer comprehensive testing platform to improve the operational safety of its transformers. Through comprehensive testing of the equipment, several old transformers were found to have serious insulation aging problems. They were replaced and maintained in a timely manner to avoid potential safety hazards.

safety measures

• 1. Before using this instrument, it is necessary to carefully read this manual.
• 2. The operator of the instrument should have general electrical knowledge.
• 3. The transformer comprehensive test bench should be used in places that are not exposed to rain, corrosive gases, excessive dust, high temperatures, direct sunlight, etc.
• 4. Instruments should avoid severe vibrations.
• 5. After the test is completed, be sure to wait for the discharge alarm to stop before turning off the power and removing the test line.
• 6. When measuring an unloaded voltage regulating transformer, be sure to wait for the discharge indicator alarm sound to stop before switching gears.
• 7. During the testing process, it is prohibited to move the test clamp and power supply line.