The Power Control Unit

A special in-house design of the power control unit (PCU) allows 100A of current to be injected into the ground in an intermittent manner triggered by an accurate GPS clock. Primary power can be generated by a standard three phase diesel generator. We are using a 60 kVA isolation transformer shown on the right side of the PCU . This transformer allows safe operation when the generator is placed in close vicinity of the current injecting electrodes.

Specifications:

Dimensions:	760mm x 580mm x 460mm high
Weight:	95 kg
Environmental:	Operating temperature range: -20oC to +40o
Input Power:	Standard Diesel – 50/60 Hz 230V 3 phase alternator
Output Current:	Max. 50A, 4 ranges
Current stability:	0.1%
Output Power:	Max. 30kW
Output Voltage:	Max. 600V
Duty Cycle:	50% to 100%
Repetition Rate:	1-20 s
Turn-off Time:	<100 microseconds (resistive load)
Controls:	Microprocessor based control with GPS synchronization
Indicators:	GPS Time and Faults

[Data Logger], [Electronics], [Software], [Squid]

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