Product overview

Transformer DC resistance in transformer manufacture of semi-finished and finished product testing, installation, transfer tests and preventive tests will measure the power sector projects, can find selection of transformer coil, soldering, joints loose, missing units, manufacturing defects such as broken and after running for possible vulnerabilities. In order to meet the needs of rapid measurement of transformer DC resistance, our company has developed with its own technology advantage YD8809 three-channel DC resistance tester. The instrument uses new power technology, small volume, light weight, high output current characteristics. Machine controlled by single-chip microcomputer automatic self test to complete, data processing, display and so on, has the function of automatic discharge and discharge instructions. Instruments high precision, simple operation and rapid measurement of transformer DC resistance can be achieved.

Three-channel DC resistance Tester, using a dual power structure, YN joins tap transformer winding, while realizing a three-phase power measurement system using an independent three-channel current, independent three-channel voltage sampling, measuring and displays a resistance value and three-phase three-phase unbalance rate. Working time is greatly reduced, solves the tapping winding of power transformer DC resistance test time-consuming issues, time required for conventional methods of 1/3.

Security measures

Be sure to read this manual carefully before using this equipment.

Equipment operators should possess electrical equipment or apparatus in general use common sense.

The instrument can be used indoor and outdoor, but should avoid the rain, corrosive gas, dust concentration, temperature, sunshine and other places of use.

Instrument should avoid severe vibration.

Instrument maintenance, care and adjustments should be carried out by professionals.

After completion of testing must discharge alarm stop and turn off the power, remove test line.

Measurement of no-load tap changer, be sure to wait for discharge instructions after the beep stops, switching gears.

In the process of testing against mobile test clamp and supply line.

Performance characteristics

Instrument current and automatically select the current operation is simple.

Three-channel measurement, real-time, simultaneous measurement of three resistance values and calculation of three-phase resistive imbalance.

Both three-phase measuring, also can be measured in the traditional way with a single channel, with a temperature conversion function and easy to use.

Protection circuit with perfect reliability.

Do not power off-calendar, clock, 80 sets of data storage, access, and print functions.

You can set the phase sequence of the resistance, and printing information such as tap position.

Vertical chassis structure, convenient for operation.

Alarm sound discharge, discharge instructions clear, reduce misoperation.

Technical specifications

Output current: automatic selection of current (up to 20A)

Output voltage: DC12V

Measuring range: 0~ 100 ω

Accuracy: ± 0.5 μg 0.2% ω

Minimum resolution: 0.1 μ ω

Operating temperature: -20~ 40 ℃

Environment humidity: ≤ 80%RH, no condensation

Working power supply: AC220V ± 50Hz ± 1Hz

Dimensions: length 340mm width 240mm 260mm

Net weight: 10.3kg