Bacci Twin, Use And Maintenance Instruction Manual

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CHAPTER 2 – Safety information
Chap. 2
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2.16.6.2 Work on the electrical system – (Risk ID: 09.02)
IDENTIFICATION RISK ASSESSMENT
Stage: Maintenance
Person: Maintenance personnel
Area: Z01 Electrical equipment
Initial risk: HIGH
RESIDUAL RISK: MEDIUM
PLr (EN 13849): -
SIL (EN IEC 62061): -
ACCIDENT SCENARIO
Consequence: 2.4 Electrocution
Situation: Maintenance on the electrical system (inspection, adjustment, substitutions).
Event: Risk of electrocution due to direct or indirect contact with parts that remain powered
even after the main switch has been sectioned:
- Interface signals
- Circuits upstream of the switch.
Body part: Entire body.
RESIDUAL RISK
Risk of electrocution due to direct or indirect contact with parts that remain powered even after the main
switch has been sectioned:
- Interface signals
- Circuits upstream of the switch.
LIMITATION MEASURES
Mechanical:
- Wiring of electrical instruments in compliance with CEI EN 60204-1 standards
(SAFETY MEASURE Q03).
- Electrical cabinet doors may be opened only with a key entrusted to maintenance
personnel (SAFETY MEASURE Q02).
- The door to the electrical cabinet cannot be opened when the switch is in the ON
position.
Electrical: -
Informative: - Work on the electrical instruments, be they powered or not, may be carried out
only by expert personnel (EXP) and informed persons (INFP), as per the definition
provided for in CEI 11-27. CEI EN 60204-1 standards do not differ between work
carried out on electrical instruments that are not power and those that are live,
therefore not obligatorily requiring that the latter be carried out by Competent
Persons (COP) as per the definition provided for in CEI 11-27.
- Before intervening on any electrical equipment, identify the relative circuits on the
wiring diagram.
- Always check for residual tension before working on circuits.
Symbols: - Electrocution warning sticker on boards and boxes containing live parts
(WARNING PE01)
- Do not enter prohibition sticker for unauthorised personnel on electrical boards
and boxes that consent access to live parts with the entire mbody (WARNING
AD01)