How to use a transformer tester to perform CT testing? The transformer tester is mainly used for tests such as CT, PT, and volt-ampere characteristics. It has many features like fast testing speed, high accuracy, and convenient and flexible use, which has always been welcomed by electric power engineers. Especially CT testing is a frequently required test for transformer testers. This article takes the YTC8750Evariable frequency transformer tester as an example to briefly explain how to use a transformer tester for CT testing.
After entering the main interface, select the CT Test option, and a submenu will appear: Parameter Setting , Secondary DC Resistance , CT Volt-Ampere , CT Ratio , Secondary Load , five function menus.
Parameter Setting
Parameter Setting interface (as shown below). Note:
When saving, the parameter settings will be used as the storage header.
When printing, the parameter settings will be used as the print header.
Note:
Please set the CT basic parameters before testing.
If the rated ratio secondary setting is incorrect, the ratio will be erroneous.
After connecting the test leads, select the CT Test option on the main menu interface,
press and rotate the mouse to select Secondary DC Resistance to enter the secondary DC resistance testinterface.
Note:
During the test, it will display: “Testing, please wait…”
CT Volt-Ampere Test
On the main menu interface, rotate the mouse to move the cursor to the CT Test option, press and rotate the mouse to select CT Volt-Ampere to enter the volt-ampere characteristic test setting interface (as shown on the right). Move the cursor to Return to Upper Level , and press the mouse to return to the main menu.
Interface Description
Maximum Output Current: The maximum current to be output, range (0 - 20) A.
Maximum Output Voltage: The maximum voltage to be output, options: 30V, 110V, 220V, 600V, 1000V; click to select.
Automatic Test: Automatically take points to plot the curve, press this button to confirm and start the test.
Manual Test: Manually take points to plot the curve, press this button to confirm and start the test.
Test Method
Take out the (red, black) secondary wires from the wire bag, insert one end into the secondary side of the CT, and the other end into the volt-ampere characteristic output port of the instrument.
