Electrical Connection - Elektror HRD Serie Betriebs- Und Montageanleitung

• The drive motor ventilation system must not be aff ected by
the installation situation.
EN
Minimum distance to the blower cover (for the intake of
cooling air)
Drive power
≤ 1.5 kW
> 1.5 kW
3.3 Blower units without motor and belt drive
During assembly of the blower with the motor, belt drive and
belt guard supplied by the purchaser, in addition to the in-
structions given in Chapter 1, the purchaser / operator must
pay attention to the following:
• Exact alignment of the belt pulleys
• Exact axial parallelism of the belt pulley axes
• Correct belt type and belt tension
• Max. permissible forces
• The V-belt pulleys must be free from burrs, rust and dirt
• Correct V-belt profi le and belt pulley type
• Max. permissible blower speeds
You will fi nd the data relevant to your appliance tabulated in
section 11 and in section 5.4 (where applicable).

3.4 Electrical connection

Note!
The work described in this section may only be
performed by a qualifi ed electrician. Connect the
appliance as per the circuit diagram in the termi-
nal box and in accordance with the relevant local
requirements.
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 must be protected using a motor overload
switch (this does not apply to frequency converter operated
appliances). Where appliances are frequency-converter-op-
erated, the existing temperature sensor (PTC resistor sen-
sor) or temperature switch (normally closed contact) must be
connected to the converter and evaluated.
• Check that the mains voltage matches the ratings on the
nameplate.
• The safety earth terminal can be found 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 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 l-
ter. 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
16
Minimum distance
to the blower cover
[mm] [inches]
34 1.34
53 2.09
Operating and assembly instructions HRD
converter and the motor. Please ensure that there
is suffi cient space in the switch cabinet and take
into account the installation and assembly require-
ments in the operating instructions of the frequen-
cy 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.
3.4.1 Confi guration for three-phase 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.
W2 U2 V2
U1 V1 W1
L1 L2 L3
(L3) (L1)
 circuit
(low voltage)
Threaded bolt
M4
M5
M6
M8
W2 U2 V2
U1 V1 W1
L1 L2 L3
(L3) (L1)
Y circuit
(high voltage)
Tightening torque
1,2 Nm
2,0 Nm
3,0 Nm
6,0 Nm
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