Single Phase Relay Tester, Relay Test Equipment

Table 1: Shift gear table of input signal amplitude

Q1: What is a relay tester?
A1: Relay tester is an important test tool to ensure the safe and reliable operation of power system. With the continuous expansion of the scale of modern power systems and the continuous improvement of the reliability and efficiency requirements of power system operation and management, the testing work of relay protection personnel has become more frequent and complex. The relay protection tester uses a high-performance industrial computer as the control computer, and directly runs the Windows operating system. The back panel of the device is provided with USB ports, network ports, serial communication ports, etc., which can facilitate data access, data communication and software upgrades.

Q2: What are the functions of protection relay tester?
A2: Protection relay tester needs to be able to respond to the faults and abnormal actions of electrical equipment, and can automatically, quickly and selectively act on the circuit breaker, remove the faulty device from the system, and ensure that the faulty device continues to work. And limit the incident to a minimum, improve the reliability of the system operation, and maximize the safety of the user's connection to the power supply. The role of relay test equipment is the role of automation equipment. "Normal" and "abnormal" operating conditions must be in the correct zone, as well as "external faults" and "internal faults" of the components to be maintained to complete the relay. Electrical maintenance function. Therefore, changes in various physical quantities reflected under various conditions can be detected and identified.

Q3: What are the advantages of relay tester?
A3: The relay protection tester has various forms in the output of current intensity, which can meet the characteristics of actual field experiments. Relay test set is not only compatible with each traditional experimental method, but also can easily carry out three-phase transformer differential protection experiments and factory power fast switching and standby self-switching experiments. Its powerful software functions can realize a variety of high-level automation technology, and large and medium-sized complex verification work. It also has the characteristics of its high-performance host and flexible output of current intensity, which greatly improves the detection production efficiency. Not only its real-time data digital signal processing ability is strong, and the operation speed is faster, but also the output waveform of the instrument equipment has high precision, small frame loss and good linearity. The function of the relay protection tester is to check whether the operation of the comprehensive relay can work normally, in order to verify the technicians find the problem early, and then deal with it in a timely manner to protect the normal operation of the overall power system.

Tips: How to use a relay test equipment?

• Carry out overcurrent relay test
  Using the "AC test" program, when the relay action is less than 35A, one phase current can be used as a variable, and an appropriate current step length can be selected. The return value, the automatic mode can only be used as the test action value; the wiring mode is to connect the current of the tester to the current coil of the relay, and connect the normally open contact of the relay to any channel of the tester.
• Carry out the undervoltage relay test
  The under-voltage relay is also called low-voltage relay, usually only has a normally closed contact. The opening of the contact indicates the action of the relay protection tester. You can choose a higher voltage value, and then reduce the voltage by a certain step, until the relay is activated. The program we choose is an "AC program", and the test is carried out manually. First, output the voltage value. Since it is a normally closed contact, the action time will be displayed on the screen. At this time, the voltage value has not been removed. We need to manually select the mouse and reduce the voltage until the screen will show Display the time, at this time, it means that the normally closed contact of the relay has been opened, which is equivalent to the return of the relay.
• During the overvoltage relay test
  Select the voltage step size and the initial voltage value, and use automatic or manual methods to change the voltage until the relay operates, and the operating voltage and operating time can be measured. When the rated voltage of the relay is greater than 120V, two-phase can be used.

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