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WILO SE 02/2011
7.4 Electrical connection
DANGER! Risk of fatal injury!
Improper electrical connections can lead to fatal electrical shocks.
• Have the electrical connection established by an electrician approved by the local elec-
tricity supplier only and in accordance with local regulations.
• Observe the installation and operating instructions of the switchgear and the accesso-
ries!
• The current type and voltage of the mains connection must correspond to the specifica-
tions on the name plate.
• Mains side fuse protection:
• DrainLift M1/8 (1~): 16 A, slow-blow
• DrainLift M1/8 (3~)>: 16 A, slow-blow
NOTE: To increase operating safety, it is essential that a circuit breaker (which disconnects
all power leads) with K characteristic is used.
• Earth the system according to regulations.
• Lay the connecting cable in accordance with the applicable standards/regulations and the
prescribed wire connection.
• It is urgently recommended to use a residual-current-operated protection switch { 30 mA
according to the valid local regulations.
• The switchgear and alarm must be installed in dry rooms which are overflow-proof. The
national regulations are to be observed when positioning [in Germany: VDE 0100].
• Make sure that the separate supply of the alarm switchgear matches the name plate data.
Connect the alarm switchgear.
• For three-phase versions, apply a clockwise rotating field.
• When connecting, the technical connection conditions of the local electricity supply com-
panies are to be observed.
7.4.1 Mains connection
DrainLift M1/8 (1~)
L, N, PE:
Mains connection 1~230 V, PE, version: Switchgear with shock-proof plug for socket
[in acc. with VDE 0620 in Germany].
DrainLift M1/8 (3~)
L1, L2, L3, PE:
Mains connection 3~400 V, PE, version: Switchgear with CEE plug for CEE socket
[in acc. with VDE 0623 in Germany].
The DrainLift M1/8 (1~) single-phase version is intended for operation on a power supply
network with a system impedance at the house connection of Z
max
= 0.218 ohms in acc.
with DIN=EN/IEC 61000-3-11 for a maximum number of 45 switching operations per hour.
NOTE: If the mains impedance and the number of switching operations per hour is greater
than the values specified, because of the unfavourable mains conditions, the unit may
cause temporary voltage drops and also disturbing voltage fluctuations (flickering).
Therefore, measures may be necessary before the unit can be operated correctly on this
connection. The necessary information must be obtained from the electricity supply com-
pany and the manufacturer of the device.
7.4.2 Alarm signal connection
The DrainLift M1/8 unit is equipped with an acoustic signal transmitter in the switchgear in
the factory.
An external alarm switchgear, a horn or flashing light can be connected via a potential-free
contact (SSM) in the switchgear.
Contact load:
• Minimum permitted: 12 V DC, 10 mA
• Maximum permitted: 250 V AC, 1 A
