1. Controller functions
◇Quick-break protection ◇Over current protection
◇Re-closing for 3 times ◇256 pcs event records
◇Surge protection ◇Three sectional current protection
◇Zero sequence protection ◇Real time clock
◇Accelerate trip off after re-closing failure
◇Inverse time protection ◇With GPRS
◇With RS232 interfaces
2. Controller features
Ø With 485/232 communication Interface, Remote control by fiber/wireless; Acceleration after re-closing: it will accelerate the tripping if the switch closed in permanent failure.
Ø Accelerate tripping off after remote close and lock re-closers:If the user forgets to remove the grounding switch when the power transmission recover after the line was repaired, ,it should accelerate the tripping.
Ø The delay time of three times reclosing can be adjusted.
Ø The tripping and closing circuit adopts anti-misoperation designing and with anti-jump function.
Ø Zero sequence current can be distinguished the failure inside/outside of section.
Ø The remote control switch is designed to prevent misoperation.
Ø Three-stage protection function can realize four groups of inverse time curve independently .
Ø The three-stage acceleration function can be activated or deactivated independently.
3. Structure feature
Ø The controller is a relay protection and monitoring micro-device;
Ø Weather resistance ,dewing -proof;
Ø Connect with the switch by aviation connectors;
Ø High reliability and prevention class;
There are 6 input simulation channel in the controller,A-phase current, B-phase current, C-phase current, zero-sequence current, AC phase-to-phase voltage, and CB phase-to-phase voltage. The controller determines the line fault by real-time monitoring the value of the above simulation and compares it with the fixed value,then carries on the corresponding treatment.