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Global Power Technologies 56
S-8500
METER & CURRENT SHUNT
The dual scale meter displays voltage at the terminal block, and current when the PUSH
TO READ AMPS button is depressed. The meter is accurate to ±3% of full scale (50
mV) and is weatherproof. A shunt is used to measure the current to the terminal block.
The voltage drop across the shunt is proportional to the current flowing through it. The
current shunt is rated at 30 Amps = 50 mV for 24V and 48V systems, and 50 Amps =
50mV for 12V systems.
SERIES
By connecting the large power resistor (1000W for 12V & 24V systems, 752W for 48V
system) in series with the CP load the maximum allowable power may be delivered to
the CP load with the current and hence pipe to soil voltage controlled. This is achieved
by moving the tap to the left side of the resistor. To reduce power to the CP load, slide
the tap to the right.
PARALLEL
By connecting the large power resistor in parallel with the TEG smaller levels of power
may be delivered to the CP load with the current and hence pipe to soil voltage controlled
and sometimes required to reduce hot spots on the CP anode. With the tap located at
the right side of the resistor the output power will be zero. As the tap is moved to the left
the power to the CP load is increased. The change from series to parallel configuration
is made by moving the wire coming from the right side of the 1000 Watt resistor, from
the left position to the center position of the heavy duty terminal block.
FOR PARTS LIST - SEE APPENDIX F, Figure 21
Figure 27 CP Interface System,
Series Wiring Diagram
Figure 28 CP Interface System,
Parallel Wiring Diagram
Summary of Contents for S-8500
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Page 63: ...Global Power Technologies 57 S 8500 Figure 29 CP Panel wiring schematic ...
Page 65: ...Global Power Technologies 59 S 8500 Figure 30 DC DC Converter Connections ...
Page 66: ...Global Power Technologies 60 S 8500 Figure 31 DC DC Converter with CP Panel wiring schematic ...
Page 72: ...Global Power Technologies 66 S 8500 Figure 32 Flowchart Battery Charging Application Setup ...