Emerson Static Transfer Switch user manual Safety Precautions

Safety Precautions

1.0SAFETY PRECAUTIONS

Read this manual thoroughly before working with the static transfer switch.

Be sure to review the warning under Important Safety Instructions on page 1.

Refer to the Handling Considerations on page 5 before attempting to move the unit.

Under typical operation and with the doors closed, only normal safety precautions are necessary. The area around the static transfer switch should be kept free from puddles of water, excess moisture and debris. The vent grate in the front of the system should not be obstructed in order to ensure a smooth air flow through the unit for cooling.

ONLY qualified service personnel should perform maintenance on the static transfer switch. When performing maintenance on any part of the equipment under power, service personnel and test equip- ment should be located on rubber mats. The service personnel should wear insulating shoes for isola- tion from direct contact with the floor.

Unless all power is removed from the input sources to the unit, one person should never work alone. A second person should be on hand to assist and summon help, should an accident occur.

Three types of messages are used throughout this manual to stress important text. Carefully read the information below each Warning, Caution and Note and use professional skills and prudent care when performing the actions described in that text.

A Warning indicates the presence of a possible serious, life-threatening condition. For example:

! WARNING

The unit is supplied by more than one power source. The Unit contains hazardous voltages if any of the input sources is ON, even when the unit is in bypass. To isolate the unit, turn OFF and lock out ALL input power sources.

Verify that all input power sources are de-energized and locked out before making connections inside unit.

Lethal voltages exist inside the unit during normal operation. only qualified service personnel should perform maintenance on the static switch.

A Caution indicates a condition that could seriously damage the equipment and possibly injure per- sonnel. For example:

! CAUTION

Risk of unit damage

The input sources to the static switch must be grounded-wye sources. input sources other than solidly grounded-wye sources may cause damage to the switch.

A Note emphasizes important text. If the instructions are not properly followed, the equipment could be damaged or may not properly operate. For example:

NOTE

Read this entire manual before installing and operating the unit.

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