1. Rectifier and Bond Reading
Tim Jenkins

2. Basic Electric - Shunts

3. Basic Electric - Shunt Formulas
Calculate Current
Given - Shunt ( .01 ohms & voltage across the shunt = 50 Mv)
Convert units of voltage, 50mv = .05v
Calculate current using Ohm’s law
I = .05 v/.01 ohms = 5 amps
Given - Shunt ( 15 amps, 50mV)
Measured voltage drop = 28mV
Determine shunt rating
Rating = 15 amps/50mV = .3 amps / mV
Calculate current
Current = .3 amps / mV x 28 mV = 8.4 amps

6. Slide Resister Application

7. Resister Wire Application
The amount of Resistance is made by the Length of the Wire.

8. Disconnect Bond Wire for Amp Drain Reading

9. 1.36 Amp Current Drain
Make Connection in series with the Circuit
Amp Drain Reading

11. Slide Resister
Lighting Arrestor

12. Connection Made on Resister from Foreign Structure and Columbia.

13. Disconnection to get Amp Drain must be made in series with the circuit.

14. Direct Bond Connection, No Resistance

15. Shunt Resister

16. Measuring Amp Drain by Measuring Voltage Drop Across the Shunt
Measuring Amp Drain by Measuring Voltage Drop Across the Shunt. Ratio is normally found on Shunt V = 1A

17. 7 milivolts = 7 Amps
Make connection across Shunt.
Polarity does not matter.

18. Ratio for Shunt
Shunts do not have to be disconnected in BI-monthly and Annual inspection.

19. Alternative method – use shunt for amp readings.
Take mili-volt reading across shunt then use ratio to figure total amps.
Connect meter in serious for
amp reading
on the structure or anode wire.