These bypass/isolation switches are UL labeled and listed for 30-cycle closing and withstand ratings based on testing per UL Standard 1008; are available in continuous current ratings from 100 A to 3,000 A; and are designed to simplify the selective coordination of overcurrent devices in backup power systems for mission-critical facilities.
The RTS series bypass/isolation switches are UL labeled andlisted for 30-cycle closing and withstand ratings based on testing per ULStandard 1008. Available in continuous current ratings from 100 A to 3,000 A,these switches simplify the selective coordination of overcurrent devices inbackup power systems for mission-critical facilities. The 30-cycle rating allowsdownstream overcurrent protective devices to clear a fault before upstreamdevices have the chance to trip. Consequently, they greatly simplify theengineering task of selective coordination mandated by the National ElectricalCode for emergency and legally required standby systems. All switches in the seriescome equipped with the RPTCS microprocessor-based transfer control system.
The switches combine an automatic transfer switch with a
manual bypass/isolation switch, which allows the transfer switch to be isolated
for inspection, maintenance, repair or testing. The bypass/isolation switch is
designed to also function as a manually-operated backup transfer switch when
the unit's automatic transfer switch is disabled or de-energized. With the
bypass/isolation switch above the ATS, the unit's vertical space-saving design
reduces its footprint. Feeder connections are housed in a third compartment
accessible through a rear panel or door, and the compartments are separatedby
barriers to protect personnel. The ATS is on casters so that, once it has been
bypassed and isolated, it can be rolled out of the enclosure safely and easily.
The switches are available in versions for open-transition
(break-before-make operation) and closed-transition transfer as well as
load-break and no-load-break bypass. Open-transition versions are available
with single or dual operators. They are also available with an external manual
operator that allows manual operation of the switch with the door fully closed
for greater arc flash protection.
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Annual Salary Survey
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.