At present, the domestic institutions that conduct ampere-second characteristic detection of DC circuit breakers and the equipment used by manufacturers for the ampere-second characteristic detection of DC circuit breakers are all fixed equipment, such as fixed high-current power supplies and large load resistors, which are large in size and weight, and inconvenient Mobile detection and analysis instruments are conventional instruments such as voltmeters, ammeters, oscilloscopes, etc., with complicated wiring and inconvenient use, which are not suitable for the mobile detection needs of various substations. In order to solve the problem of on-site detection of the actual characteristics of DC circuit breakers, our company has launched a "DC circuit breaker ampere-second characteristic tester" suitable for on-site use in substations, easy to carry, and highly automated, which can provide DC protection for operation and maintenance departments The testing method of electrical appliance action characteristics is to verify the action characteristics and level difference coordination of DC protection appliances, so as to improve the reliability of the DC system operation and ensure the safe and reliable operation of the power grid. The DC circuit breaker ampere-second characteristic tester is specially designed for substation test, overhaul and maintenance work. Meet the overload and short-circuit characteristic test of DC circuit breakers, thereby improving the level of the DC system of the substation, and avoiding skipping trips and large-scale blackouts caused by DC distribution networks.

The YNAS-1000A DC ampere-second characteristic tester adopts an integrated design, a high-performance industrial computer, a large-size LCD screen, and keyboard and touch panel input, which are simple to operate and convenient to use. Small size, light weight, easy to carry, suitable for on-site testing of substations.

(1) The main control part adopts high-performance industrial computer, Windows XP operating system, real-time display of various parameter curves and values;

(2) Keyboard and touch panel input (USB mouse can be connected); 5.7 inch TFT true color LCD screen display. Simple operation, beautiful interface, all parameters are clear at a glance;

(3) Switching constant current control technology, new power devices, 1～1000A independent setting constant current output, high constant current accuracy, strong load capacity, and stable work for a long time;

(4) It is suitable for the ampere-second characteristic test of DC circuit breakers with a rated current of 1A～1000A, and can be used for the ampere-second characteristic test of 6A～100A DC fuse;

(5) The measurement method adopts full-point test or sampling point test, with fast response speed, high test accuracy, and safety and reliability;

(6) The instrument has overheating, overcurrent, and overvoltage protection functions, good electromagnetic compatibility, and strong anti-interference ability;

(7) The test management software can automatically complete the test of the ampere-second characteristic of the DC circuit breaker, and analyze the test data to draw the circuit breaker protection characteristic curve (ampere-second curve), and generate report output;

(8) The industrial computer comes with 4G storage space, which can store test records at will, and is equipped with two USB ports to facilitate the extraction and printing of test records;

(9) The instrument adopts an integrated design, which is easy to carry.

☆ Working voltage: AC220V, 50Hz

☆ Ambient temperature: -20℃～50℃

☆ Working humidity: £90%RH

☆ Test current: 1～1000A

☆ Test current ripple coefficient: <2%

☆ Output current stability: ≤±1%

☆ Time record range: 1ms～1000s

☆ Time resolution: 0.1ms

☆ Operation mode: keyboard, touchpad (USB mouse can be connected)

☆ Dimensions: 530mm×470mm×200mm

☆ Weight of the instrument: 25kg

☆ Instrument shell: aluminum alloy instrument box