Wilo Actun OPTI-MS Series, Installation And Operating Instructions Manual

Page: 64 / 372

64 WILO SE 11/2018 DIN A5
English INSTALLATION
6.3. Electrical connection
RISK of fatal injury due to electrocution!
Improper electrical connections can lead to fatal
electrical shocks. Electrical connections may only
be carried out by a qualified electrician approved
by the local energy supply company, in accordance
with locally applicable regulations.
• The mains connection current and voltage must be as stated on the rating plate.
• Connect the connection cable in accordance with the applicable standards and regula-
tions and according to the conductor assignment.
• Any available monitoring devices must be connected and tested to ensure that they are
working properly.
• Earth the submersible pump according to the regulations.
Units that are permanently installed must be grounded in compliance with nationally
applicable standards.
• If a separate protective ground conductor connection is available, it must be connected
to the marked drilled hole or ground terminal (
;
) using a suitable screw, nut, toothed
lock washer, and flat washer. The cross section of the cable for the protective ground
conductor must comply with the local regulations.
• A power supply separator must be provided by the customer!
• Main switch for connection to a power supply grid
• DC switch for operation with photovoltaics systems
• We recommend using a residual-current device (RCD).
• Switchgear units must be purchased as accessories.
6.3.1. Extending cable
The pump is delivered ex works with a connected connection cable for the power supply
and connected signal cables routed in parallel. The connection cable and the signal
cable (if used) must be extended to the required length on site prior to installation to
suit the available space in the borehole using the enclosed sealing kit. The sealing kit is
intended to extend round cables.
Observe the minimum diameter of the connection cable required for extension
regardless of the individual wire cross-section for connection:
• 12 mm for the connection cable intended for power supply (large hole in the
casting mold)
• 8 mm for the signal cable, if available (small hole in the casting mold)
Compliance with the minimum diameter prevents escaping sealing resin
during casting.