Circuit Breaker Ampere-Second Tester

I.Summary

At present, the DC feed network of the substation mostly adopts the tree structure, from the battery to the electrical equipment in the station, generally through the three-level power distribution, each level of power distribution mostly uses the DC circuit breaker as the protective electrical appliances.Due to the upper and lower dc circuit breaker protection action characteristics do not match, in the process of dc system operation, when the lower electrical equipment short circuit failure, often cause trip of dc circuit breaker, thus cause other feed line power accident, and cause substation primary equipment such as high voltage switch, transformer, capacitor, and so on. In order to prevent the hidden danger caused by the mismatch of the action characteristics of the DC circuit breaker and other DC protection appliances, the State Grid Corporation of China stipulates that the DC protection appliances of the newly installed and operated devices must be tested to ensure that the performance is consistent with the design and ensure the correctness of the DC circuit differential cooperation.

The safety characteristics of DC protection appliances are generally tested in national laboratory or testing station. The equipment covers a large area and requires special charging device and high current load box for complicated operation. Some operating units test the difference of substation battery, but the current-action time characteristics cannot be accurately tested.Therefore, after the DC system is put into operation, the field maintenance personnel can not test whether the safety characteristics of the DC protection electrical appliances meet the requirements because they do not have the corresponding test means and tools.

According to the reality of DC protection appliances second characteristic test, the company launched a suitable substation site, portable, high automation of DC circuit breaker second characteristic test system, can provide the operation and maintenance department, and differential calibration, in order to improve the reliability of DC system operation, to ensure the safe and reliable operation of the power grid.

HMZKC-1000 DC circuit breaker ampere second characteristic test system is suitable for rated current 1A~1000A DC circuit breakers and can be used for 6A~150A DC fuses.

II. Feature

The instrument can be used either alone or online with the PC

320*240 LCD display, high-speed thermal printer, man-machine dialogue full keyboard operation mode, the whole process of intelligent work

Power electronic control technology is used to produce large current output, output current response speed is fast, high precision, continuous adjustable

Multiple high-precision sensors automatically switch the current range and the high-performance 14-bit AD acquisition chip

With power storage function, you can save 200 sets of test data

Automatically save the setting data, and display the last setting data after the power is off

Optional Ampere-second action test mode and through-flow non-action test mode

When connected to PC, you can operate the control instrument, import test data, store test data, generate data report, generate data curve, generate EXCEL report, etc.

The instrument has superheat, overcurrent, overpressure protection and protection functions

The instrument has strong anti-interference ability and strong electromagnetic compatibility performance

III. Parameter

1. Power supply：220V±10%，Frequency：50Hz±0.5 Hz；

2. Test current range：0—1000A；

3. current ripple coefficient:Less than5%；

4. Stability of the output current：≤0.5%；

5. Time recording：0-9999S；Minimum time resolution：0.001S；

6. Ambient temperature ：－20℃~50℃

7. Net Measuring size：470mm(L)×320mm（W）×460mm（H）；

8. Net gross：30 kg