In the neutral point below 1000v direct grounding system, grounding resistance Rd less than or equal to 4 ohms, repeated grounding resistance less than or equal to 10 ohms. The voltage 1000V below the neutral point of the ungrounded system, the general provisions of the grounding resistance Rd is 4 ohms. Therefore, according to the actual installation experience, in the street lighting system grounding resistance Rd should be less than or equal to 4 ohms.
The static alarm is made of high-precision electronic components with high precision, fast response speed, strong anti-interference ability, small size, light weight, easy to use and other characteristics; for human wrist strap grounding system has an automatic alarm function, you can always monitor the anti-static wrist strap work status, running without noise, for anti-static (personal) work area of the wrist strap grounding system to provide a reliable guarantee. The system can provide a reliable guarantee for the anti-static (personal) work area wrist strap grounding system.
● Can monitor two wristbands and multiple wristbands at the same time.
● Human wrist strap grounding system normal operation: no sound, green light.
● When the human wristband grounding system is disconnected: there is a beep sound and red light flashes.