CURRENT AND VOLTAGE METERING BUSHING
A current and voltage measuring bushing is disclosed. The current and voltage measuring bushing may have a current sensor and a resistive voltage divider commonly located in the bushing. In one or more embodiments, the current and voltage metering bushing may have current and voltage measuring accuracy of 0.3% or better.
1 . A current and voltage measuring bushing comprising a resistive divider that is slanted to provide insulation strength at a low voltage terminal.
2 . The current and voltage measuring bushing of claim 1 , wherein a dielectric strength of a bushing material is graded to provide insulation strength at a low voltage terminal.
3 . The current and voltage measuring bushing of claim 1 , further comprising a voltage sensing element that is a resistive voltage divider, and a current sensing element that is an iron core CT.
4 . The current and voltage measuring bushing of claim 1 , wherein the voltage sensing element is a resistive voltage divider and the current sensing element is a Rogowski coil wherein the signal correction circuit of the coil is external to the bushing.
5 . The current and voltage measuring bushing of claim 1 , wherein the voltage sensing element is a resistive voltage divider, and the current sensing element is a Rogowski coil wherein the coil's signal correction circuit is internal to the bushing.
6 . The current and voltage measuring bushing of claim 1 , wherein the voltage and current measurement signal are brought to a connector accessible on a surface of the bushing.
7 . The current and voltage measuring bushing of claim 5 , wherein the voltage sensing element is a resistive voltage divider, and the current sensing element is an iron core CT.
8 . The current and voltage measuring bushing of claim 5 , wherein the voltage sensing element is a resistive voltage divider, and the current sensing element is a Rogowski coil wherein the coil's signal correction circuit is external to the bushing.
9 . The current and voltage measuring bushing of claim 5 wherein the voltage sensing element is a resistive voltage divider, and the current sensing element is a Rogowski coil where the coil's signal correction circuit is internal to the bushing.
10 . The current and voltage measuring bushing of claim 5 wherein the voltage and current measurement signal are brought to a connector accessible on the surface of the bushing.
11 . The current and voltage measuring bushing of claim 1 further comprising a temperature sensor.
12 . The current and voltage measuring bushing of claim 1 , further comprising a pressure sensor.
13 . The current and voltage measuring bushing, further comprising a moisture sensor.
14 . The current and voltage measuring bushing of claim 1 , further comprising a thermal radiation sensor.
15 . The current and voltage measuring bushing of claim 1 , further comprising an arcing sensor.
16 . The current and voltage measuring bushing of claim 1 further comprising a smoke sensor.
17 . The current and voltage measuring bushing of claim 1 further comprising a gas sensor.
18 . The current and voltage measuring bushing of claim 6 , further comprising a temperature sensor.
19 . The current and voltage measuring bushing of claim 6 , further comprising a pressure sensor.
20 . The current and voltage measuring bushing of claim 6 , further comprising a moisture sensor.