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Note: A preventive
maintenance program is not
intended to cover
reconditioning or major
repair, but should be
designed to reveal, if
possible, the need for such
actions in time to prevent
malfunctions during
operation.
26
Maintenance
Failure to maintain the equipment can result in death, serious injury, property damage or product
failure, and can prevent successful functioning of connected apparatus.
The instructions contained herein should be carefully reviewed, understood and followed.
The maintenance tasks in Table 2 must be performed regularly.
Introduction and maintenance intervals
Periodic inspections and maintenance are
essential to safe and reliable operation of
the circuit breaker.
When circuit breakers are operated under
"usual service conditions," maintenance and
lubrication are recommended at five-year
intervals for the type SDV7-MA outdoor
distribution circuit breaker, or at the number
of operations indicated in Table 23:
Maintenance and lubrication schedule on
page 29. "Usual" and "unusual" service
conditions for outdoor medium-voltage
circuit breakers are defined in 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.
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® (especially 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.
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