Maintenance - Siemens 3AH3 Instruction Manual

28

Maintenance

Introduction and maintenance intervals
Periodic inspections and maintenance are
essential to safe and reliable operation of
the circuit breaker operator module.
When circuit breakers are operated under
"usual service conditions," maintenance and
lubrication are recommended at ten-year
intervals (five-year intervals for the type
SDV6 outdoor distribution circuit breaker) or
at the number of operations indicated in
Table 2. "Usual" and "unusual" service
conditions for medium-voltage metal-clad
switchgear (includes circuit breaker module)
are defined in ANSI/IEEE C37.20.2, sections
4 and 8.1, ANSI/IEEE C37.04, section 4 and
ANSI/IEEE C37.010, section 4. Generally,
"usual service conditions" are defined as an
environment where the equipment is not
exposed to excessive dust, acid fumes,
damaging chemicals, salt air, rapid or
frequent changes in temperature, vibration,
high humidity and extreme temperatures.
The definition of "usual service conditions"
is subject to a variety of interpretations.
Because of this, you are best served by
adjusting maintenance and lubrication
intervals based on your experience with the
equipment in the actual service
environment.
Hazardous voltage and high-speed moving parts.
Will cause death, serious injury and property damage.
De-energize before working on this equipment.
Read instruction manuals, observe safety instructions and use qualified
personnel.
Regardless of the length of the maintenance
and lubrication interval, Siemens
recommends that circuit breakers should be
inspected and exercised annually.
For the safety of maintenance personnel as
well as others who might be exposed to
hazards associated with maintenance
activities, the safety related work practices
of NFPA 70E, chapters 1 and 2, should
always be followed when working on
electrical equipment.
Maintenance personnel should be trained in
the safety practices, procedures and
requirements that pertain to their respective
job assignments.
This instruction manual should be reviewed
and retained in a location readily accessible
for reference during maintenance of this
equipment.
The user must establish a periodic
maintenance program to ensure trouble-free
and safe operation. The frequency of
inspection, periodic cleaning and a
preventive maintenance schedule will
depend upon the operation conditions.
NFPA publication 70B, "Electrical equipment
maintenance" may be used as a guide to
establish such a program.