125Maintenance
EN
8.2 Inverter total de-energization and safe access
The purpose of this paragraph is to provide instructions for de-energize the PVS-175-TL inverters in order
to allow access to active parts inside the inverter. The procedure describes the steps to perform a total
isolation and thus includes operations on devices that are located outside the inverter. The total isolation
approach consider the disconnection of the inverter from any possible voltage source to which the inverter
may be connected. The test of residual voltage potentially present inside the inverter is included in this
procedure. This procedure is intended exclusively to be used by skilled or trained persons in accordance
with safety standards EN 50110-1 and EN 50110-2 (CENELEC/CEN) or equivalent standards. Furthermore,
only these skilled or trained persons are permitted to carry out the procedure.
8.2.1 Operator and maintenance personnel skills/prerequisites
WARNING – B The customer has civil liability for the qualification and mental or physical state of
the personnel who interact with the equipment. They must always use the personal protective
equipment (PPE) required by the laws of the country of destination and whatever is provided
by their employer.
ATTENTION – A Personnel in charge of using and maintaining the equipment must be skilled for
the described tasks and must reliably demonstrate their capacity to correctly interpret what
is described in the manual.
ATTENTION – A For safety reasons, the installation must be performed by qualified installers
and/or licensed electricians in accordance with the existing regulations in the country of
installation and in accordance of all safety rules for performing electrical works. The installers
must have demonstrated skills and knowledge of the inverter’s structure and operation.
FORBIDDEN – H Maintenance operation carried out by a person who is NOT qualified, is
intoxicated, or on narcotics, is strictly forbidden.
The following job requirements and qualifications are required to operate on the inverter:
•
Compliance with all legal standard in force in the installation country to perform the electrical work
described on this procedure.
8.2.2 Clothing and protection of personnel
The following Personal Protective Equipment (PPE) are required to perform any intervention on the
inverter:
• Dielectric helmet EN397 – EN50365 (1000Vac-1500Vdc) with visor EN166 grade 8.
• Insulating composite gloves class 0 EN60903 (1000Vac-1500Vdc) resistant to electric arc class 2 (7kA)
EN61482-1-2 in combination with protective overglove in leather EN420 – EN388.
• Work overall UNI EN 11612 A B1 C1 resistant to electric arc class 2 (7kA 1s.) CEI EN 61482-1-2.
• Safety shoes.
8.2.3 Safety equipment and tools
The following equipment and tools are required to perform any intervention on the inverter:
• Disconnect tool for DC side (PV) connectors (provided with PVS-175 Installation KIT).
• Voltage detector (EN 61243-2) capable of 3kVdc and up to 1kVac.
• DC current clamp.
• Safety tags “work in progress, do not operate”.
• Padlocks.
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