Safety Notice - Elgar SW 5550AE Operation Manual

SAFETY NOTICE

Before applying power to the system, verify that the SW Series unit is configured properly for the user's
particular application.
WARNING!
Hazardous voltages in excess of 280 VRMS, 600V peak may be present when
covers are removed. Qualified personnel must use extreme caution when
servicing this equipment. Circuit boards, test points, and output voltages
may be floating above (below) chassis ground.
Installation and service must be performed by qualified personnel who are aware of dealing with attendant
hazards. This includes such simple tasks as fuse verification.
Ensure that the AC power line ground is connected properly to the SW Series unit input connector
or chassis. Similarly, other power ground lines including those to application and maintenance
equipment must be grounded properly for both personnel and equipment safety.
Always ensure that facility AC input power is de-energized prior to connecting or disconnecting the
input/output power cables.
During normal operation, the operator does not have access to hazardous voltages within the
chassis. However, depending on the user's application configuration, HIGH VOLTAGES
HAZARDOUS TO HUMAN SAFETY may be generated normally on the output terminals. Ensure
that the output power lines are labeled properly as to the safety hazards and that any inadvertent
contact with hazardous voltages is eliminated. To guard against risk of electrical shock during open cover
checks, do not touch any portion of the electrical circuits. Even when the power is off, capacitors can retain
an electrical charge. Use safety glasses during open cover checks to avoid personal injury by any sudden
failure of a component.
Due to filtering, the unit has high leakage current to the chassis. Therefore, it is essential to operate this unit
with a safety ground.
Some circuits are live even with the front panel switch turned off. Service, fuse verification, and
connection of wiring to the chassis must be accomplished at least five minutes after power has been
removed via external means; all circuits and/or terminals to be touched must be safety grounded to
the chassis.
After the unit has been operating for some time, the metal near the rear of the unit may be hot enough to
cause injury. Let the unit cool before handling.
Qualified service personnel need to be aware that some heat sinks are not at ground, but at high potential.
CAUTION!
380V 3-phase input power systems (4–wire) must have a neutral connection.
(For units built before June 2004: the neutral must not be switched. Apply
neutral before phase voltage or serious damage to the equipment may
result).
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