The KDJB-IV relay protection tester is a newly developed highly intelligent and multifunctional relay protection calibration instrument based on the original JBC. Adopting single-chip microcomputer technology, it consists of an automatic synchronous digital millisecond meter, logic control unit, multifunctional digital display unit, high-precision data acquisition and processing unit, current and voltage output unit, overload and over range protection unit, etc. It comes with built-in printing and display, automatic testing process, greatly improving measurement accuracy and work efficiency.

1. Due to the use of microcomputer control in this machine, there are only 16 touch switches on the panel, which can easily complete various testing functions. This has changed the problem of old-fashioned relay protectors requiring power to be turned off and multiple switches to switch power types, and the operation is simple.
2. This machine also has self checking and error reporting functions, which greatly facilitate inspection and maintenance.
3. This machine is equipped with self check and self-protection functions. After starting up, the machine immediately engages in self check. In the event of overload or overtravel, the protection circuit will quickly cut off the output and emit sound and light reminders, greatly reducing the losses caused by misoperation.
4. This machine has a high degree of intelligence. With just one key press, you can measure the parameters of a universal relay and automatically print the data, freeing you from the tedious testing operations.
5. The display screen of this machine has a functional display unit, which can clearly reflect the working status of the machine from the display screen.
6. The data printed on this machine uses Chinese characters, such as "suction voltage", "disconnection voltage", "normally open suction time", etc.

1. The AC voltage output is continuously adjustable from 0 to 250V, with a maximum output capacity of 600VA and an over range protection of 260V, with an error of ± 1%.
2. The AC current output is 0-50A, continuously adjustable from 0-100A, with an error of ± 1%.
When the voltage is between 0 and 50A, the open circuit voltage is 5V.
From 0 to 100A