Total De-Energization Of The Evse; Reference Standards; Hazards; Risk Assessment - Weather Conditions - ABB Terra 94 UL Operation And Installation Manual

Maintenance and troubleshooting
9.3

Total de-energization of the EVSE

The total de-energization instruction specifies the use of mandatory PPE, tools, equipment and operations to
carry out the electrical de-energization of the EVSE.
NOTE
This instruction does not supersede any legal regulations. The local regulations may impose
requirements not reflected in this standard. The most stringent requirements must be applied.
9.3.1

Reference standards

• EN 50110-1 (CENELEC/CEN)
• Refer to EN 50110-2 (CENELEC/CEN) for additional National Annexes dedicated to CENELEC members
Countries
9.3.2

Hazards

The system de-energization is not a sufficient condition to operate. All sources must be accurately identified
and isolated with external isolation by dedicated breakers, they must be locked and tagged, then accurately
verify the absence of any voltage atop (below the main breaker) the main incoming line.
9.3.3

Risk assessment - Weather conditions

• This instruction can be applied only in case of dry environment, without storming, lightning and raining.
• The doors must be placed in a locked position when opened.
• In the event of wind, it is necessary to strengthen the door locking mechanism with appropriate tools.

9.3.4 Working area preparation

Unplug and remove any vehicle from the EVSE under maintenance and secure it from any vehicles connection,
if necessary, barricade the area with barriers, put warning signs to avoid unauthorized people to use them.
Check that the area is dry and free from flammable materials and others hazard.

9.3.5 Personal Protective Equipment (PPE)

The below table mentions the mandatory Personal protective equipment (PPE) to be worn by the engineers
working onsite.
NOTE
Check PPE before use. All the activities of this procedure (till the completion of the procedure) must
be performed wearing the PPE.
Insulation gloves must be verified before and after use.
PPE
Insulating gloves
Arc-flash rated clothes
Arc-flash rated head protection
(balaclava)
Dielectric helmet with integrated
arc flash visor
Safety shoes
Description
• Insulating composite gloves class 0 EN 60903 (1000Vac-1500Vdc)
electric arc tested cat.2 7kA EN61482-1-2;
• Protective gloves (EN420 – EN388)
IEC 61482-1-2 Class 2 (ATPV 40 cal/cm
added with overall arc-flash protection
IEC 61482-1-2 Class 1 (ATPV 8 cal/cm
(balaclava)
EN397 – EN50365 class 1 1000V
EN166 – Arc flash visor grade 8
Type S3 EN20345
Sole electrical resistance > 2000 MΩ tested EN20344
2 ) basic arc-flash protection
) arc-flash protection for head
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