JYR-10C+ DC winding resistance tester Demo Video:
Why DC Winding Resistance Testing of Transformers is Needed?
DC winding resistance testing is considered an essential routine screening tool. It helps identify issues such as loose, defective, or incorrect connections, which lead to transformer failures each year, making it a failure category of its own. Winding resistance testing can also reveal problems with transformer tap-changers, on-load tap changers (OLTC), and de-energized tap changers (DETC)—key components that frequently fail in transformers, and according to some statistics, they are among the leading causes of transformer failures.
JYR-10C+ DC winding resistance tester Function Introduction:
● The testing range is from 0Ω to 20kΩ, with an automatic temperature switching function.
● The maximum output current is 20A, which can test all inductive DC resistances up to 110kV.
● The maximum output voltage is 24V, ensuring high testing speed.
● With a DC and AC switch, it is suitable for measuring all inductive loads, such as transformers, PTs, CTs, etc.
● Equipped with a permanent calendar, it can store up to 100 sets of data, and the temperature automatic conversion function ensures data is not lost during a power failure.
● With a large color touch screen, the data is clear and easy to read.
● Equipped with an RS485 communication interface for PC control.
● Equipped with a USB storage interface for data export and a thermal printer for printing.
● Equipped with anti-arcing protection for inductively tested products.
● Equipped with AC380V misconnection protection to prevent damage from incorrect operation.
● Equipped with a sound alarm for discharge and clear discharge indication.
● Equipped with an internal high-efficiency power source without a fan, preventing dust ingress and extending the lifetime.
TECHNOLOGY SPECIFICATION:
Deployment
10C+
Output current
20A,10A,3A,1A,300mA,100mA,20mA, Auto
Test range
0~20kΩ
Accuracy
0.2%±1μΩ
Minimum resolution
0.1μΩ
Power supply in operation
AC220V±10%, 50Hz±1Hz
Temperature in operation
-20~40℃
Relative humidity
≤80%RH, No forming dew
Volume
Length 395mm Width 240mm Height 250mm
Net weight
8 kg
Application range
Suitable for all levels of inductive resistance measurements of 110kV and below
