Maintenance; Introduction And Maintenance Intervals; Recommended Handtools; Recommended Maintenance And Lubrication - Siemens 3AH Series Instructions Manual

Maintenance

Introduction and Maintena nce Intervals
Periodic inspections and maintenance a re essential to obtain
safe and reliable operation of the circuit breaker.
Hazardous voltages and high-speed moving
parts.
Will cause death, personal injury, and
property damage.
De-energize before working on this equi pment.
Read instruction manuals, observe safety in-
structions, and l i m it use to q ua l ified person nel.
When circuit breakers a re operated under "Usual Service
Conditions;'maintenance a n d l u brication is recommended
at ten year intervals or at the n umber of operations indicated
in Table 2. " Usua l " and " U n us u a l " service conditions for
Medium Voltage Metal-Clad Switchgear (incl udes Circuit
Breaker Module) are defined in ANSI C37.20.2, section 8.1.
Generally, "usual service cond itions" are defined as an envi­
ronment in which the eq uipment is not exposed to exces­
sive dust, acid fumes, damaging chemicals, salt air, rapid or
frequent changes in temperature, vibration, high humidity,
a n d extremes of temperature.
The definition of "usual service conditions" is subject to
a variety of interpretations. Because of this, you are best
served by adjusti ng maintena nce and lu brication intervals
based on your experience with the equipment in the actual
service environment.
Regardless of the length of the maintenance and l ubrication
interval, Siemens recommends that circuit brea kers should
be inspected and exercised annually.
For the safety of ma intenance personnel as wel l as others
who might be exposed to hazards associated with mainte­
nance activities, the safety related work practices of NFPA
70E, parts II and Ill, should always be fol lowed when working
on electrical equ ipment. Ma intenance personnel should be
trained in the safety practices, procedures and requirements
that perta in to their respective job assignments. This manual
should be reviewed and retained in a location readily acces­
sible for reference during maintenance of th is equ ipment.
The user must establish a periodic maintenance program
to ensure trouble-free and safe operation. The freq uency of
inspection, periodic cleaning, a n d preventive maintenance
schedule will depend upon the operation cond itions. N FPA
Publication 70B, "Electrical Equ ipment Maintenance"
A DANGER
may be used as a guide to establish such a progra m . A
preventive maintenance program is not intended to cover
reconditioning or major repair , but should be designed to re­
veal , if p ossible, the need for such a ctions in time to prevent
malfunctions during operation.

Recommended HandTools

Metric h a rdware is used on these circuit breakers. Following
list of hand tools describes those normally used in d isas­
sem bly and re-assembly procedures.
7,
• Open end wrenches: 8, 10, 1 3, 17 and 19 mm
• Open end wrench: 55 mm used to exchange shock
a bsorber (Oty: 2 pes are required for the task).
7,
• Sockets: 8, 10, 13 and 1 7 m m
• Socket: 3 6 mm (used for replacing post insulators)
• Deep Sockets: 19 and 24 m m
• Hex keys: 5, 6, 8 a n d 10 m m
•Torque wrench: 0-1 50Nm (0-1 00ft-lbs)
• Screwdrivers: 0.032 x 1/4 in. wide
and 0.55 x 7/1 6 in. wide
• Pliers
• Light Hammer
• Dental M i rror
• Flashlight
• Drift Pins: 1/8, 3/16, a n d 1/4 in.
• Reta ining Ring Plier
(external type, tip d i a m eter 0.040 in.)

Recommended Maintenance and Lubrication

Periodic maintenance and lubrication should include a l l the
tasks shown in Table 1. Recommended procedures for each
of the l isted tasks are provid ed in this section of the manual.
A WAR NING
Failure to properly maintain the equipment could result
in death, serious injury or product failure, and can prevent
successful functioning of connected apparatus.
Instructions should be ca refu lly reviewed, understood, and
followed.
The maintenance tasks i n Table 1 must be performed regu­
la rly.
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