European Union and United Kingdom
To meet the European Union Directives and United Kingdom Regulations, according
to standard EN 60204-1, Safety of Machinery, the disconnecting device must be one
of the following types:
• switch-disconnector of utilization category AC-23B (IEC 60947-3)
• disconnector that has an auxiliary contact that in all cases causes switching devices
to break the load circuit before the opening of the main contacts of the disconnector
(EN 60947-3)
• circuit-breaker suitable for isolation in accordance with IEC 60947-2.
North America
Installations must be compliant with NFPA 70 (NEC)
1)
and/or Canadian Electrical Code
(CE) along with state and local codes for your location and application.
1)
National Fire Protection Association 70 (National Electric Code).
Other regions
The disconnecting device must conform to the applicable local safety regulations.
￭ DC solar PV main power supply
When you perform maintenance or wiring activities in the drive cabinet, make sure that:
• you disconnect Solar PV supply at string combiner box level
or
• remove the solar PV connections before installing the drive cabinet
or
• remove DC fuse inside drive cabinet.
Selecting the main contactor
You can equip the drive with a main contactor.
Follow these guidelines when you select a customer-defined main contactor:
• Dimension the contactor according to the nominal voltage and current of the drive.
Also consider the environmental conditions such as surrounding air temperature.
• IEC devices only: Select contactor with utilization category AC-1 (number of
operations under load) according to IEC 60947-4, Low-voltage switch gear and
control gear.
• Consider the application life time requirements.
54 Guidelines for planning the electrical installation
To Next Page
Loading...
