Under-voltage and overvoltage protection relay
UPA-200 series
Marsh Bellofram
The UPA-200 is a reliable safety tool for pre-verification of the presence or absence of residual electrical power or charges, or as a zero energy indicator, both before or during mechanical lock out/tag out (LOTO) procedures. When illuminated, the device (patent pending) provides critical early warning of high-voltage conditions occurring inside of an industrial enclosure, reducing the risk of electrical arcs flash and electrocution. It is ideal for any high-voltage industrial monitoring applications requiring enhanced NFPA70E and OSHA compliance.
The UPA-200 series pre-verifies electrical isolation from outside an electrical panel enclosure. Hardwired to the circuit breaker or main disconnect, UPA-200 series LED's flash to indicate the presence of any hazardous electrical condition associated with stored energy, as well as detection of potential ground fault problems. Series units are engineered with built-in redundant circuitry, with two lights per phase or ground line, allowing the power alert to be powered by the same voltage as it indicates. The 8-detector UPA-200 series visually alerts to the presence of dangerous AC or DC (Stored Energy) potentials occurring between any combinations of the four monitored input lines.
There is no voltage present on the enclosure door, due to the use of fiber-optics to transmit LED lights to the door panel. As such, UPA-200 series units may be mounted on an ungrounded door panel. The unit is easily installed into the panels through standard push-button 30 mm knockouts, and with its DIN rail or surface mounted base.
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