短路关合试验数字式保护装置研制

Development of Digital Relay Protection Device Used for Short Circuit Making Capacity Test

为了解决高压开关设备进行关合试验时所需的保护装置耐受重复性大电流的问题,研制了一套专用保护跳闸装置。通过对常规保护装置交流变换器的硬件改进,使其满足在输入电流200A及以下能可靠动作的特殊要求。经长期使用表明,该装置运行灵敏可靠,耐受大电流能力强,完全满足短路关合试验的要求。

During short circuit making capacity test of high voltage switchgear, to enable relay protection device to withstand repeated heavy current, a set of specific protective tripping device was developed. Improving AC converter＇s hardware in conventional protective device, under input current up to 200 A, the specific requirements of reliable operation were satisfied. The use for long time proved that this unit with advantages of sensitive and reliable running, stronger capacity for withstanding heavy current completely satisfy requirements of short circuit making capacity test.