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The Portable DC Ground Fault Detector System (PGFD-1) is a new approach to detection and troubleshooting
of current leakage problems in DC distribution systems. Its design overcomes the shortcomings of previous detection
systems and methods of troubleshooting.
- The PGFD-1 allows technicians to quickly locate DC ground faults.
- The PGFD-1 does not require service interruption to install, use, or remove.
- The PGFD-1 does not inject AC signals or pose any danger to sensitive electronics or operations.
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State-of-the-Art Technology
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The PGFD-1 is a microprocessor-based DC ground leakage current detector system. It provides a quick and cost-effective
method of locating grounds in ungrounded multi-feeder DC distribution systems. The PGFD-1 is specially designed
for use in power generation, distribution, and industrial applications where lines have high capacitive reactance,
electromagnetic, and electrostatic fields. It's patented technology has no effect on system operation or sensitive
electronic equipment.
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PGFD-1 vs. Voltmeters
While voltmeters can indicate the presence of a ground vault, they cannot identify its location. And multiple
ground faults can cause voltmeters to have false indications. The PGFD-1 can quickly detect the exact location
of each fault.
PGFD-1 vs. AC Signal Injection
Devices that inject a 15 to 30 HZ AC signal can detect the location of some low impedance ground faults. However,
this method is not safe for multi-feeder distribution systems with large stray capacitance between the line and
ground.The injected AC signal damage sensitive electronics or de-energize vital equipment. The PGFD-1 operates
passively by measuring the existing magnetic fields around each conductor. The PGFD-1 is completely safe for sensitive
electronics and equipment operation.
Edison ESI offers on-site testing and troubleshooting services to detect and locate ground faults on ungrounded
DC-powered multifeeder distribution systems. Our experienced technicians can quickly detect and locate the problem
so your system can be restored to optimal reliability before a major problem occurs. |