Motor monitoring relays
Motor monitoring relays now include phase monitoring, which uses microprocessor-based designs to protect against phase loss, reversal, unbalance, undervoltage and overvoltage conditions.
ProSense motor monitoring relays now include phase
monitoring, alternating and pump seal failure relays. The phase monitoring
relays use microprocessor-based designs to protect against phase loss,
reversal, unbalance, undervoltage and overvoltage conditions. With a variety of
user-adjustable settings, the relays also feature a multi-color LED to indicate
normal and fault conditions.
The PMRR series provides protection against phase reversal,
while the PMRRL series, with an adjustable undervoltage setting knob, protects
against phase loss, reversal and undervoltage. AR series alternating relays
feature a three-position selector switch to alternate two loads as normal, or
lock the relay to one load or the other. The ARX model is a DPDT cross-wired
unit that alternates two loads as normal, or locks the relay to always operate
the same load first each time.
Also available are PSFR series pump seal failure relays,
which monitor the shaft seals of submersible pumps. Featuring a user-adjustable
sensitivity knob, the relays are available in two 8-pin models - SPDT single
channel or dual channel relay with two SPNO contacts.
Accompanying 8-pin 10 A, 600 V octal sockets are also
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After almost a decade of uncertainty, the confidence of plant floor managers is soaring. Even with a number of challenges and while implementing new technologies, there is a renewed sense of optimism among plant managers about their business and their future.
The respondents to the 2014 Plant Engineering Salary Survey come from throughout the U.S. and serve a variety of industries, but they are uniform in their optimism about manufacturing. This year’s survey found 79% consider manufacturing a secure career. That’s up from 75% in 2013 and significantly higher than the 63% figure when Plant Engineering first started asking that question a decade ago.