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INSTRUCTION MANUAL DISTANCE RELAY GRZ100
INSTRUCTION MANUAL DISTANCE RELAY GRZ100

... To maintain high reliability, not only must the relay have a robust hardware structure but it is also important to detect any fault immediately and not to leave the relay in a faulted state for prolonged periods. Therefore, the GRZ100-7∗∗B is equipped with an automatic supervision function. Whenever ...
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Ground loop (electricity)

In an electrical system, a ground loop is an equipment and wiring configuration which results in excessive unwanted current in a conductor connecting two points that are supposed to be at the same electric potential, often ground, but are actually at different potentials.Ground loops are a major cause of noise, hum, and interference in audio, video, and computer systems. They do not in themselves create an electric shock hazard, the inappropriate connections merely create a not necessarily very good instance of Electrical_bonding, which is explicitly required by safety regulations in certain circumstances. In any case the voltage difference between the ground terminals of each item of equipment is small. A severe risk of electric shock occurs when equipment grounds are improperly removed in an attempt to cure the problems thought to be caused by ground loops.
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