Siemens VBII Instructions D'entretien

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SAFETY SWITCH MAINTENANCE INSTRUCTIONS
For use with: 30-1200 Amp Type VBII Safety Switches
Danger
Hazardous Voltage.
Will cause death or
serious injury.
Turn off and lock out all power supplying this
equipment before working on this device.
Replace all covers before power supplying
this device is turned on.
Use only with Siemens certified components.
NOTE: - These instructions do not claim to cover all
details or variations in equipment, or to provide for
every possible contingency to be met in connection
with installation, operation or maintenance. Should
further information be desired or should particular
problems arise, which are not covered sufficiently
for the purchaser's purposes, the matter should be
referred to the local Siemens sales office. The contents
of this instruction manual shall not become part of or
modify any prior or existing agreement, commitment
or relationship. The sales contract contains the entire
obligation of Siemens. The warranty contained in the
contract between the parties is the sole warranty of
Siemens. Any statements contained herein do not
create new warranties or modify the existing warranty.
1. Introduction
When appropriately maintained, safety switches can
provide reliable electrical protection for many years.
The exact lifetime of a safety switch, however, is
determined by the switch's operational duty and by
its environment. Good practice includes periodic
switch maintenance during plant shutdowns or
during a regular maintenance period as specified, for
example, in NFPA 70B. The maximum maintenance
interval should not exceed one year for mechanical or
current-carrying parts. More frequent maintenance is
recommended for unusual conditions as described in
Table 1. The following instructions are a guideline for
maintaining Siemens Safety Switches.
2. Additional Guidelines
In addition to this guideline, refer to the latest edition of
the following standards for more information and best
practices for switch maintenance.
• NEMA KS-3: Guidelines for Inspection and
Preventive Maintenance of Switches Used
in Commercial and Industrial Applications
(available online at www.nema.org)
• NFPA 70B: Recommended Practice
for Electrical Equipment Maintenance
(available online at www.nfpa.org)
Peligro
Tensión peligrosa.
Puede causar la muerte o
lesiones graves.
Desenergice totalmente el equipo antes de
instalar o darle servicio. Reemplace todas
las barreras y cubierta antes de energizar el
interruptor.
3. Unusual Performance Conditions
Contact Siemens Customer Service for more
information regarding performance under unusual
service conditions. Examples of these conditions are
included in Table 1 below.
Table 1: Unusual Performance Conditions
Ambient temperatures below -22 °F (-30 °C) or
above 104 °F (40 °C)
Operating duties - Solar (PV), Compressors, Cyclic
loading
Corrosive or explosive environments
Abnormal vibration, shock, or tilting
Altitudes over 6,600 ft (2,012 m)
Frequencies other than 60 hz or DC
4. Safety Precautions
The inspection and preventive maintenance of switches
in service require the user to take all necessary
precautions to avoid being injured. Electrical equipment
should be installed, operated, serviced, and maintained
only by qualified personnel. Work practices described
in NFPA 70E must be followed at all times.
4.1 Operate the switch to the OFF position.
4.2 Turn OFF and lock out all power supplying the
switch to electrically isolate it from all other circuits
before performing any work on or inside the switch.
4.3 Open the enclosure door and verify that there is
no voltage on the incoming and load conductors
(including control power conductors, if present) and
between these conductors and ground to confirm
that the equipment is de-energized.
4.4 Always use a properly rated voltage sensing device
on all line side and load side terminals to confirm
the switch is OFF.
4.5 If disconnection of power and accessory leads,
cables, or bus bars is required, be sure to properly
identify all connections to ensure safe and accurate
reconnection.
1 / 4
Danger
Tension dangereuse.
Danger de mort ou risque de
blessures graves.
Mettre hors tension et cadenasser l'alimen-
tation avant d'intervenir sur cet appareil.
Remettre tous les couvercles en place avant
de remettre cet appareil sous tension.
I.L. No. R500634A01