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1. General Description

In the power system, because of the following reasons, may bring the electric arc caused by short circuit fault in the switchgear equipment.

1. Isolating switch takes the wrong operation
2. With grounding line closing
3. Forget to measure the voltage of working area
4. Equipment fault & Electric equipment in wrong cperation
5. After the equipment with normal repairmen, there is some tools missing in the switch cabinet.
6. The wrong wiring and bus connection
7. Insulation burn-in, machine wear, overvoltage
8. Dust, temperature, humidity, animal and the other environmental factors.

   In the power system, because of the following reasons, may bring the electric arc caused by short circuit fault in the switchgear equipment.

9. Isolating switch takes the wrong operation
10. With grounding line closing
11. Forget to measure the voltage of working area
12. Equipment fault & Electric equipment in wrong cperation
13. After the equipment with normal repairmen, there is some tools missing in the switch cabinet.
14. The wrong wiring and bus connection
15. Insulation burn-in, machine wear, overvoltage
16. Dust, temperature, humidity, animal and the other environmental factors.

2. Characteristics

2.1 THT-APS Electric Arc Light Integrated Protection System (cut off the total failure typical action time for 60-70ms ), greatly shortened the protective times than traditional time. Effectively limit the electric arc light fault in the initial stage.

2.2 The arc and over-current signals are simultaneously detected: When only one kind of alarm signals is detected, it will give alarms, and when the two kinds of signal are simultaneously detected, it will give tripping signals to prevent system malfunction. Its specific current protection delay has the range of 0-60s.

2.3 High integration design

2.4 Advanced hardware

2.5Perfect communication and fault location functions