Wilo STRATOS GIGA, Installation And Operating Instructions Manual, Page: 90 / 265

English
90 WILO SE 03/2018
NOTICE:
If the plastic plug is removed, protection class IP55 is no longer
ensured.
NOTICE:
In the case of insulated systems, only the pump housing may be insu-
lated, not the lantern, drive and differential pressure sensor.
An insulating material which does not contain ammonia compounds
must be used when insulating the pump, in order to prevent stress
corrosion cracking of the union nuts. If this is not possible, direct con-
tact with the brass screw connections must be avoided. Stainless
steel screwed connections are available for this as an accessory. As an
alternative, corrosion protection tape (e.g. insulation tape) can also be
used.
7.3 Electrical connection
Safety DANGER! Risk of fatal injury!
Incorrect electrical connections can cause fatal electric shocks.
• Have the electrical connection set up by an electrician approved by
the local electricity supplier only and in accordance with local reg-
ulations.
• Observe the installation and operating instructions for the acces-
sories!
DANGER! Risk of fatal injury!
Contact voltage hazardous to human life.
Work on the electronic module may only be started after 5 minutes
have elapsed, due to the dangerous residual contact voltage
(capacitors).
• Before working on the pump, disconnect the supply voltage and
wait for 5 minutes.
• Check whether all connections (including potential-free contacts)
are voltage-free.
• Never use an object to poke around the openings on the electronic
module and never insert anything into the terminal box!
DANGER! Risk of fatal injury!
For generator operation or turbine operation of the pump (rotor
drive), there may be a dangerous contact voltage at the module’s
contacts.
• Close the shut-off devices upstream and downstream of the pump.
WARNING! Risk of mains overload!
An inadequate mains design can lead to system failures and cable
fires due to mains overload.
• When designing the mains, with regard to the cable cross-sections
and fuses, give special consideration to the fact that short-term
simultaneous operation of all pumps is possible in multi-pump
operation.
Requirements and limit values for
harmonic currents NOTICE:
Pump of power classes 11 kW, 15 kW, 18.5 kW and 22 kW are devices
for professional use. These devices are subject to special connection
conditions, as an R
sce
of 33 at the connection point is insufficient to
operate them. Connection to the public low voltage power supply is
regulated via standard IEC 61000-3-12 – the basis for the evaluation
of the pumps is table 4 for three-phase devices under special condi-
tions. For all public connection points, the short-circuit output S
sc
at
the interface between the electrical installation of the user and the
power supply must be greater than or equal to the values listed in the
table. It is the responsibility of the installer or user, if necessary with