Metso MP1000, Technical Reference Manual

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SECTION 0 - SAFETY
MP SERIES CONE CRUSHER TECHNICAL REFERENCE MANUAL
0-29
0.4.3 Electrical Safety During Maintenance
and Repair
0.4.3.1 General
Be sure all electrical components are brought to a
zero energy state including capacitors and similar
electrical devices.
Before maintenance work:
– Be sure all control power supplies are
turned off, disconnected, and lock out
procedures have been followed.
– Confirm that ALL power sources are
disconnected. Some electrical devices may
be supplied by more than one power
source.
– Be aware that multiple voltage levels may
exist in some junction boxes.
– Ensure that during lockout procedures,
locks and signs are appropriately attached,
and subsequently removed only by the
person who installed them after all work is
completed. Follow Crushing Plant lockout
instructions for placement and removal.
– For testing and troubleshooting, clear all
personnel from the machine just as though
the machine were being returned to
production mode. Reactivate the necessary
power supplies and perform the tests.
Then disconnect all power supplies and
follow lockout instructions before further
maintenance work is performed.
– Be sure electrical supply voltage is
disconnected before drilling into any
structural frame members. Electrical
cables may be inside.
– Verify that electric motors are
disconnected before starting any
maintenance work, thereby preventing the
supply of electricity to the motor.
Generally the disconnects are located in
the drive control room. Each person
performing maintenance work should
install their lock and sign the lockout tag.
– Always turn off electrical power before
disconnecting electrical cables.
DANGER
Confined spaces may contain high
concentrations of gases which may cause
injury or death. Follow all established safety
procedures.
DANGER
Follow all established lockout procedures.
For maintenance work, disconnect all
devices from electric, pneumatic and
hydraulic power sources and follow lockout
procedures.
The lockout instructions, locks, tags and the
blocking/restraining devices provided are
designed for your protection. Your
responsibility is to follow the program and
use the proper equipment.
Remember:
• Follow procedures.
• Stay alert.
• Do not take anything for granted.
• Verify lockout.
• Tags must identify the work being done
and the person(s) who locked and
tagged the control.
• Locks and tags are changed with each
work shift.
Work to eliminate injury and death.
Follow proper procedures at all times!