1、 Overview:
This circuit breaker test bench is designed and manufactured according to the technical requirements provided by the customer, in compliance with Article 9.10 of GB10963.1-2005, Article 7.2.1 of GB14048.1-2006, and Article 8.13 of JB/T8979-2006 national standards. Capable of conducting delayed tripping characteristic tests on circuit breakers, that is, applying 1.13 times, 1.45 times, and 2.55 times the rated current for testing whether they trip within the specified time; It is also possible to conduct instantaneous tripping characteristic tests on circuit breakers, that is, to apply 3-10 times the rated current for testing whether they trip within the specified time. Suitable for online pre delivery testing of molded case circuit breakers and small circuit breakers, it is an essential equipment for home appliance performance testing in circuit breaker manufacturers. This device has the functions of rapid product installation, automatic testing, and automatic judgment.
The equipment casing is assembled with high-quality aluminum alloy steel, coated with sheet metal for sealing, and coated with anti-static, anti rust, and anti-corrosion coatings on the surface. The upper part of the equipment is equipped with a panel, power switch, and various specifications of wire heads (for delayed release testing). The equipment is designed reasonably, easy to use, simple to operate, reliable in performance, and has a beautiful appearance.
2、 Working principle:
This testing platform adopts the principle of low voltage and high current output, using the internal high current isolation transformer to output current. The current size is set through the touch screen to control the PLC, and the PLC controls the motor to drive the voltage regulator to adjust the primary input voltage of the transformer to achieve the adjustment of the output current. It has the function of automatically stabilizing the current. Compare the test time and test trip time through the touch screen display to determine the quality of the circuit breaker.
3、 Basic parameters:
Equipment input power supply: three-phase 380V/50HZ/15KVA;
Testing the characteristics of molded case circuit breakers: small/molded case instantaneous tripping characteristics, delayed tripping characteristics, temperature rise and power consumption testing
Control mode: PLC touch screen (Siemens) control
Thermostatic box: This thermostatic box is combined with the testing machine and can maintain a temperature range of room temperature to 50 degrees Celsius, with a temperature resolution of 0.1 degrees Celsius and a temperature stability of ± 1 degree Celsius (using a terminal block method, with three delay stations and one instantaneous station; meeting the requirements of 1-4P circuit breakers)
2. Delay release parameters:
1) Output AC current: 10~600A;
2) Output AC voltage: 0~5V;
3) Output current channels: 3 channels, multiple P circuit breaker contacts are connected in series to connect several switches for testing;
4) Test small circuit breaker products: 3~1250A
5) Test small circuit breaker products: 63~250A
6) Current output waveform: sine wave (correction device current waveform distortion not greater than 5%, system error not greater than 3%)
7) Current control mode: automatic adjustment, current is set on the touch screen;
8) Current accuracy: 0.5 level;
9) Voltage accuracy: Level 0.5;
10) Transformer ratio: 600/5A;
11) Test time: 1~9999H 59M 59s;
12) After applying 1.13 times the current, it quickly and automatically rises to 1.45 times the current within 5 seconds;
13) Fixture: using terminal block method, delayed three stations, instantaneous one station; Satisfy 1-4P circuit breakers
3. Instantaneous release test parameters:
1) Fixture: using terminal block method, delayed three stations, instantaneous one station; Satisfy 1-4P circuit breakers
2) Output current: AC 100A~3500A;
3) Number of output current channels: 1 channel,
4) Current accuracy: 0.5 level;
5) Resolution: 1A
6) Instantaneous testing time ≤ 0.2s;
7) Upper limit setting of action time: 1-200ms;
8) Lower limit setting for action time: 1~200ms;
9) Testing station: 1 station
10) Conduction angle: 0~180 degrees optional
11) Equipment control mode: PLC+touch screen control
12) Timing time: 1~99999ms;
13) Protection functions: short circuit protection, overload protection, leakage protection;
14) Operating environment temperature: 0~+40 ℃;
15) Relative humidity: (20~90)% RH;
Chassis size: Length 1800 * Width 780 * Height 1600
4. Temperature rise and power consumption testing:
When the circuit breaker is tested under normal operating conditions and specified conditions, the temperature rise of its components shall not exceed the limit values specified in Table 7,
Circuit breakers should not be damaged to affect their functionality or safety of use.
12 temperature measurement channels, with a temperature resolution of 0.1 degrees;
Accuracy: 0.2 level, measurement and control speed is 0.1 seconds per channel.
Wires for temperature rise test: 1, 1.5, 2, 5, 4, 6, 10, 16, 25, 50, 70, 95, 120 square meters, 1 meter in length for each specification, 2 pieces in quantity;
Wires for temperature rise test: 16, 25, 50, 70, 95, 120 square meters, 2 meters in length for each specification, 2 pieces in quantity;
Special adhesive for temperature rise: 1 bottle
Glue dispensing: 1 bottle
Measurement range 0~200 degrees;
Thermocouple model: T-type
Equipped with temperature curve display; Having a temperature data recording table;