37
Instruction Booklet
IB022018EN
Effective July 2020
Instructions for the installation and
EATON
www.eaton.com
Section 2: Safe practices
2.1 Recommendations
Type XGIS vacuum circuit breaker elements are equipped with high
speed operating mechanisms. They are designed with several built-in
interlocks and safety features to provide safe and proper operating
sequences.
m
WARNING
TO PROTECT PERSONNEL ASSOCIATED WITH INSTALLATION, OPERATION,
AND MAINTENANCE OF THESE SWITCHGEAR ELEMENTS, THE FOLLOWING
PRACTICES MUST BE FOLLOWED:
•
Only qualified persons, as defined in the local electrical code, who
are familiar with the installation and maintenance of medium-
voltage circuits and equipment, should be permitted to work on
switchgear.
•
Read these instructions carefully before attempting installation or
commissioning of this equipment.
•
Do not work on a closed breaker or a breaker with closing springs
charged. The closing spring should be discharged and the main
contacts opened before working on the breaker. Failure to do so
could result in injuries.
•
Do not use a circuit breaker by itself as the sole means of
isolating a high voltage circuit. Open the 3PDS and follow
good lockout and tagging rules, as well as all applicable codes,
regulations and work rules.
•
XGIS switchgear employs sulfur hexafluoride (SF
6
) in the
enclosure tank, at slightly higher than nominal atmospheric
pressure. Special precautions must be followed if service is
required on the SF
6
tank.
•
SF
6
is heavier than air and will displace air in a confined space.
This can present a suffocation hazard.
•
Never allow only one person access to the XGIS tank to perform
maintenance or service work.
•
Always replace the tank desiccant after performing tank
maintenance.
•
Once XGIS tank service is completed, personnel must clean their
hands, faces and exposed skin immediately. Tools and PPE must
also be cleaned.
•
SF
6
MUST NOT be discharged into the atmosphere. It should be
collected and may be reused only after treatment and testing by
qualified experts.