13
W2
U2
V2
U1
V1
W1
W2
U2
V2
U1
V1
W1
(L3) (L1)
(L3) (L1)
L1 L2 L3
L1 L2 L3
EN
Operating and assembly instructions S-MP
www.elektror.com
9016319 01.20/09
3.3 Electrical Connection
Note!
The work described in this section may only be
performed by a quali
fi
ed electrician. Connect the
appliance to the power supply in the terminal box
as per the wiring diagram and observing the
applicable local regulations.
• The drive motor should be safeguarded with a motor pro-
tection switch (does not apply to frequency converter-op-
erated devices). For devices operated with a frequency
converter, the existing temperature sensor (PTC resistor
sensor) or temperature gauge (break contact) should be
connected and analysed on the converter.
• Check whether the mains voltage corresponds with the in-
formation on the rating plate.
• The protective earth conductor is in the terminal box.
Note!
The following information should also be ob-
served when operating the drive motor with a
frequency converter:
• Only motors must be used on the frequency
converter that are marked on the rating plate with
the option “/FU”, “suitable for use with a frequen-
cy converter” or that were ordered and con
fi
rmed
as “suitable for use with a frequency converter”.
• The frequency converter supply voltage must
only be a maximum of 400 V without the motor
fi
lter. Appropriate measures such as a motor
fi
lter
to protect the motor must be installed on the
motor terminals with higher frequency converter
supply voltages, longer lines and/or if the pulse
voltages are exceeded (max. 1000 Vpk for drive
motors up to 0.75 kW, maximum 1300 Vpk for
drive motors larger than 0.75 kW) Please contact
the converter supplier in this case. If a motor
fi
lter
is included in the delivery, this must be installed
between the converter and the motor. Please
ensure that there is su
ffi
cient space in the switch
cabinet and take into account the installation and
assembly requirements in the operating instruc-
tions of the frequency converter/motor
fi
lter
manufacturer.
• The maximum cable length between the mo-
tor and switch cabinet frequency converter (e.g.
Lenze Vector, Omron MX2 and Omron RX) must
not exceed 20 m. Maximum cable lengths of up to
3 m are permitted with Kostal INVEOR frequency
converters installed close to the motor and up to
10 m with Lenze MOTEC frequency converters.
Further information on wall mounting close to the
motor can be found in the original operating and
assembly instructions of the respective frequen-
cy converter manufacturer. The electrical con-
necting cables between the motor and frequency
converter in the above cases must be suitable
shielded cables, laid using the shortest route and
without clamping and plug-in connections and
connected correctly at both sides.
• The shielding braid in the connecting cables
must be connected fully, continuously and on
both sides, i.e. to the frequency converter and
motor, and at low resistance and permanently to
protective earthing systems or the main earthing
bus bar. Suitable EMC cable glands must be used
for this on the motor side and also on the INVEOR
wall mounting plate, if necessary.
• It is important to ensure that the solid con-
nection of the device to the protective earthing
system or several suitable earthing lines is at low
resistance and permanent for blowers installed
with electrical insulation (e.g. through vibration
dampers, compensators, insulated pipes, etc.) for
frequency converter operation.
Further information on EMC-compliant installation and as-
sembly work can be found in the information in the operating
and assembly instructions of the frequency converter sup-
plier.
3.3.1 Switching operation for three-phase alternating
current blowers
Warning!
Danger due to loose or improperly tightened con-
nections!
Improperly tightened and loose connections
cause electric shocks,
fi
res, property damage and
personal injuries!
Check for loose connections and tighten in
accordance with the tightening torques in the fol-
lowing table.
-switching Y-switching
(low voltage)
(high voltage)
Threaded bolt
Tightening torque
M4
1,2 Nm
M5
2,0 Nm
M6
3,0 Nm
M8
6,0 Nm
Checking the direction of rotation
Brie
fl
y switch on the blower. The direction of rotation of the
impeller must correspond with the directional arrow on the
housing. L1 and L3 should be switched if the direction of ro-
tation is wrong.
Star-delta start-up
Motors over 3.5 kW are intended for star-delta start-up on the
mains power supply. Please clarify the conditions for direct
switch-on (high short-circuit current at the moment of switch-
on) with your energy supplier.
3.3 Special Connections and Additional Terminals
Connection diagrams for voltage interchangeable motors,
pole-changeable motors, FC motors and other special wiring
of three-phase and single-phase alternating current motors
are included in the motor terminal box as part of the delivery.
This also applies to the optional thermal winding protection
and anti-condensation heating.
3.4 Declaration concerning the EMC Directive
(2014/30/EU)
Our blowers are components that are designed to be in-
stalled in other machines or systems by quali
fi
ed personnel,
i.e. not intended for consumers. The manufacturer of the
fi
nal system/machine must guarantee/con
fi
rm that the
fi
nal
system/machine complies with the EMC Directive.
