The purpose of ground-fault protection is to measure the ground leakage current of an electrical installation, or part of an installation, and interrupt the power supply if the ground-fault current becomes dangerous to property. Vigirex™ ground-fault relays, with associated sensors (current transformers), measure the leakage current in an electrical installation to detect levels that may be damaging. When used for protection, they cause an associated circuit breaker or switch to interrupt the supply of power to the protected system. They may also be used for monitoring only, with output to an alarm. The Vigirex product line can be used with loads up to 3200A. It includes fixed sensitivities from 30 mA to 1 A and adjustable sensitivities up to 30 A, providing a solution that offers both flexibility and performance. The responsiveness of the Vigirex relay is determined from a combination of their sensitivity (measured in milliamperes or amps) and their time delays (duration that the threshold of ground-fault is exceeded). These can range from instantaneous (no intentional delay) to 4.5 seconds. The shortest delay will provide the greatest protection, while the longest will minimize nuisance tripping. The range of time delays is also helpful when providing a coordinated ground-fault protection scheme. This Vigirex, time delay switch is mounted. This product complys to UL standards.