Electrical Connection - Elektror ND series Betriebs- Und Montageanleitung

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• Installation of standard blowers with a vertical drive shaft is
possible with ND blowers up to the following models:
maximum to D 082.
• Wall and ceiling mounting is possible up to a maximum of
the following types:
maximum D 066/E 066 and 2D 066
• Other standards and regulations must be observed
depending on the application.
• Blower feet and consoles must be designed only for the
respective blower's own weight.
• Cover the open air intake and discharge with protective
grilles according to DIN EN ISO 13857.
• Ensure that the motor has adequate ventilation.
Permitted ambient temperatures with:
Standard model with Elektror motor and a rated voltage of
50 Hz or 60 Hz:
• Ambient temperature -20°C to +60°C
Note!
The rated effi ciencies and the effi ciency classes
of the motors are given as per IEC 60034-2-1 for
operation at an ambient temperature of 25°C.
As per IEC 60038 Elektror motors are generally
designed for an extended voltage range of ±10%.
However, the stated effi ciency relates to the rated
voltage, i.e., the extended tolerance is not taken
into account.
Special voltages, multi-voltage motors, models suitable for
frequency converters, FUK models, devices with UL ap-
proval, devices with Aircontrol and other motor makes:
• Ambient temperature -20°C to +40°C
• Voltage tolerance ±5% (For exceptions, see „4.2 Fre-
quency converter operation")
• The drive motor ventilation system must not be aff ected
by the installation situation.
Minimum distance to the blower cover (for the intake of
cooling air)
Drive power
≤ 1.5 kW
> 1.5 kW

3.3 Electrical connection

Note!
The work described in this section may only be
performed by a qualifi ed electrician. Connect the
appliance to the power supply in the terminal box
as per the wiring diagram and observing the ap-
plicable local regulations.
Three-phase or a.c. motors can be used as drive motors.
In the appliance designation, the letter D stands for three-
phase a.c. and the letter E for single-phase a.c.
• The drive motor has to be safeguarded by a motor circuit
breaker (this does not apply to frequency-converter-oper-
ated appliances). Where appliances are frequency-
converter-operated, the existing temperature sensor
(PTC resistor sensor) or temperature switch (normally
closed contact) must be connected to the converter and
evaluated.
• Check to see if the mains voltage matches the voltage
specifi ed on the rating plate.
• The safety earth terminal can be found in the terminal box.
Minimum distance
to the blower cover
[mm] [inches]
34 1.34
53 2.09
Operating and assembly instructions ND
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 confi 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 suffi 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.
For further information about EMC compliant installation and
assembly, refer to the operating and assembly instructions
issued by the frequency converter manufacturer.
EN
13