■ Product Overview

The transformer on load tap changer tester has AC and DC comprehensive measurement capability. In one instrument, various DC and AC parameters of on load tap changer can be measured, such as switch selection, whether there is open breakpoint in the whole process of switching, AC / DC transition waveform, transition time, transition resistance, three-phase synchronization, etc; The embedded system is developed with stable performance. The 7-inch capacitive touch screen and shortcut keys are used together, which makes the on-site operation simple and fast. The test report can be directly generated on site. At the same time, the USB interface can be connected with the external mobile storage device to import and export data, which is convenient for users to back up and import analysis.

■ technical parameters

▲ insulation performance:

a) Insulation resistance: the insulation resistance between the power input end and the casing is more than 20m Ω

b) The insulation level of the test device shall be able to withstand 1500V AC voltage (effective value)

▲ internal output AC inverter power supply:

a) Power frequency: adjustable frequency point (within the range of 40Hz ~ 60Hz)

b) Output voltage: three-phase 800V (effective value, varying with load)

c) Output capacity: rated 1000VA, instantaneous output 1500va (lasting for 200ms, overload protection does not act)

d) Voltage waveform distortion rate: ＜ 2%

e) Voltage phase angle: 120 °, phase angle difference ≯ 120 °± 1 °

▲ internal output DC constant current power supply

a) Opening voltage: 24V

b) Current: 1a, 0.5A optional

c) Resistance test range: 0.5 ~ 40 Ω; Test accuracy: 2% + 2 words

d) Time test range: 1 ~ 240ms; Test accuracy: 0.2% + 2 words

▲ sensor accuracy:

a) Accuracy of voltage and current sensor: level 0.2

b) Sensor response speed: ≤ 15 μ s

c) Voltage range: 0V ~ 800V (effective value)

d) Current range: 0ma ~ 100mA (effective value), 0A ~ 5A (effective value)

▲ data sampling:

a) Sampling accuracy: 16 bits

b) Sampling rate: 200K

c) Sampling storage depth: 64M

▲ net weight of test device: 35kg

▲ overall dimension: 530mm * 320mm * 370mm