3500/61 Bentley power control module

3500/61

3500/61

3500/61

This system uses UPS power supply, and the UPS itself has isolation function. Compared to other cards, damaged cards have two common ways of connecting to external devices in the system, which may introduce strong electricity and burn out the cards.

1. The signal cable shield wire cable on the card wiring terminal enters the control room terminal cabinet from outside. The shielded wire is in contact with the terminal cabinet, and if there is strong electricity passing through, it may cause strong electricity to enter the card. However, subsequent inspections revealed that due to construction reasons, a burnt out displacement monitoring card was not connected to the shielding wire. It can be determined that this pathway is not the main cause of card damage.

2. All external monitoring ports on the damaged card panel are connected to the KD5000 status detection system. After inspection, the KD5000 system uses a non UPS power supply and does not have strong current isolation function. And there is no protective grounding terminal in the wall type three sockets used. Strong electricity may enter the card through this pathway.