Circuit Breakers And Switches - Ngpdu; Mechanical Hazards; Pet System Safety; General - GE Discovery LS System Service Manual

GE H
EALTHCARE
D 2307224-100, R
IRECTION EVISION
2.7.2.3

Circuit Breakers and Switches - NGPDU

Refer to . There are three groups of circuit breakers in the NGPDU that are used to protect various
parts of the system.
CB2 - Circuit Protection (Axial Drve)
CB3 - Full Winding Protection
CB4 - CT Gantry Service Outlets
CB5 - CT Gantry Rotating Loads
CB6 - Table and CT Gantry Stationary Loads
CB7 - Operator Console
CB8 - PET Gantry
CB9 - NGPDU Control Power Supply
2.7.3

Mechanical Hazards

The NGPDU's top cover is not hinged. To access the top of the NGPDU, loosen the top cover front
retaining screw, then lift and remove the NGPDU top cover.
2.8

PET System Safety

The service procedures for components described in this section can be found in the Advance PET
Imaging System Service Manual, Direction 2100507.
2.8.1

General

Safety signal words are used throughout the PET installation and in the service manual. safety
labels are affixed at various locations in the PET subsystem, to protect you and the equipment from
potentially hazardous conditions. The safety labels cover the following concerns:
• Electrical safety
• Mechanical motion safety
• Laser safety and regulatory requirements
• Radiation safety
• Other labels for temperature hazards and rating
The safety label colors depend on signal words, as indicated in section. Caution labels are yellow,
warning - orange, and danger - red. Notes that list marking and rating are white with black text.
Only illustrations for safety related labels are presented here. In addition to these labels, the system
also has ETL and TUV certification labels (ETL listing and the GS mark), Type B equipment mark
(the stick figure outline).
2.8.2

Safety Signal Definitions

CATION, WARNING, and DANGER are the safety signal definitions used on the PET system to
alert installation and service personnel to a hazardous condition. Colors assigned are shown below
to signify the hazard levels. An information note or rating label is on a white background.
Safety signal definitions are explained in Section 1.6.1.
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Chapter 2 - Discovery LS System Safety Information
D LS S S
ISCOVERY YSTEM ERVICE
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ANUAL