Hi,
I am wanting to measure the electric potential around a high voltage insulator, using some electronics circuitry. To begin, I have a probe which is suspended at a particular point on the insulator and the insulator is raised to 100kV. Assuming a uniform potential distribution, if the probe is placed roughly half way down the insulator, then the probe should be raised to around 50kV.
I have also made an electronics circuit to pick up the voltage from the probe. The circuit is a battery powered (floating) device which consists of a resistor divider network (to scale down the voltage by a ratio of 1000) and then a DMM to measure the signal.
The problem however, is that the circuitry has its own ground (from the batteries it is powered from) and therefore has a different ground to the probe voltage (this is referenced to the HV ground). I cannot find a way to measure the probe voltage using isolated electronics circuitry, can anyone suggest a solution?
Thanks.
I am wanting to measure the electric potential around a high voltage insulator, using some electronics circuitry. To begin, I have a probe which is suspended at a particular point on the insulator and the insulator is raised to 100kV. Assuming a uniform potential distribution, if the probe is placed roughly half way down the insulator, then the probe should be raised to around 50kV.
I have also made an electronics circuit to pick up the voltage from the probe. The circuit is a battery powered (floating) device which consists of a resistor divider network (to scale down the voltage by a ratio of 1000) and then a DMM to measure the signal.
The problem however, is that the circuitry has its own ground (from the batteries it is powered from) and therefore has a different ground to the probe voltage (this is referenced to the HV ground). I cannot find a way to measure the probe voltage using isolated electronics circuitry, can anyone suggest a solution?
Thanks.