1、 Overview: This testing machine complies with the standard requirements of GB 13539.1-2008 Low Voltage Fuses Part 1, Section 8.4, to test the operating characteristics of fuses, including verification of agreed non melting current and agreed melting current, verification of rated current of "g" fuses, time current characteristics, etc; Provide a comprehensive and convenient testing plan for various quality inspection institutes and fuse manufacturers.
2、 System composition
This testing machine consists of two DC constant current sources, a PLC programmable controller, a computer, a current transmitter, a current sensor, a movable chassis, etc.
This testing machine can stably output the required test current, eliminate the influence of power supply voltage fluctuations, connecting wires or copper bars, and changes in test sample resistance on the test current, and improve the accuracy of test results. This power supply has low loss, high efficiency, easy operation, and complete control and detection functions. Computers and oscilloscopes are installed on the equipment, making operation convenient and high-end. (Oscilloscope provided by the customer)
3、 Main technical parameters
1) Input power supply: single-phase AC 220V, ± 5%, 50HZ, power 30KW;
2) Output DC current 1~5000A, 1 channel;
3) Output DC current 1-500A, 1 channel;
4) Output voltage 0~5V;
5) Test fuse current range: 1~5000A, can test overload current of 2.0/2.5/3.0/3.5/4.0/5.0/5.0/8.0/10 times (i.e. 20~5000A)
6) Power on time: 0.1~999.9/s/m continuous setting;
7) Power off time: 0.1~999.9/s/m continuous setting;
8) Instantaneous melting time measurement: 1~999999/ms;
9) Test frequency: 1~9999999 times;
10) Current stability range:+0-3% (upper and lower limits can be selected);
11) Constant current accuracy: ≤± 1% reading;
12) Judging function: whether it meets the standard;
13) Output current circuit: 1 circuit;
14) Test samples: 1-14 pieces;
15) The internal box of the equipment provides a constant temperature and humidity environment: the temperature can be set arbitrarily between 21 and 30 degrees Celsius, and the humidity is below 70%;
16) Sample inner box size: length 1400, height 600, depth 300
17) Dimensions of the testing machine: length 1950 * depth 750 * height 1600
4、 Capable of functionality
1) This device is controlled by a programmable logic controller (PLC), combined with a current transmitter to collect and measure the current, and to test the on/off current of the fuse. The human-machine dialogue is conducted between the computer and the display screen.
2) The computer display screen can control the following content:
Test current setting;
Setting of testing time;
Measurement of current conduction time;
Setting of current interruption time;
Test frequency setting: 1~999999;
Display the curve graph of current and time;
Measurement display of voltage drop;
Measurement of temperature rise of fuse: capable of measuring 16 temperature points;
Full Chinese interface, simple settings and easy operation;
3) Equipment reserves oscilloscope interface for oscilloscope measurement;
4) Computers provide rich alarm and diagnostic functions, with a high degree of automation;
5) Intelligent program control software with high reliability and strong anti-interference ability;
6) Protection function: It has short-circuit and overcurrent protection functions, and allows no load.
7) The equipment is equipped with load-bearing wheels for easy movement, and the bottom is a universal roller with brakes.