Safety Notice - Elgar TrueWave TW 5550 Operation Manual

S AF E T Y NOT I CE
Before applying power to the system, verify that the TW Series unit is configured properly for the user's
particular application.
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 TW 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 no less than 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.
380V 3-PHASE INPUT POWER SYSTEMS (4 WIRE) MUST HAVE A
NEUTRAL CONNECTION. (FOR UNITS BUILT BEFORE JUNE 1004: THE
NEUTRAL MUST NOT BE SWITCHED. APPLY NEUTRAL BEFORE PHASE
VOLTAGE OR SERIOUS DAMAGE TO THE EQUIPMENT MAY RESULT).
WAR NI NG!
CAU T I ON!
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