Instructions For Operation And Use; Basic Information; Frequency Converter Operation - Elektror RD-F Montageanleitung Und Bedienungsanleitung

Operating and assembly instructions RDF
Blowers with frequency converter operation (FU):
Prior to the start-up and during operation of the device on a
frequency converter (provided that this is suitable) it is es-
sential that the EMC instructions from the frequency convert-
er manufacturer and the information in the Elektror operating
EN
and assembly instructions are observed in order to meet the
requirements of the EC "Electromagnetic Compatibility" Di-
rective 2004/108/EC.
If the device is delivered together with a frequency converter
package for switch cabinet or wall mounting closer to the mo-
tor, it is possible to comply with EN 61800-3 category C2 (In-
dustrial environments), taking into consideration the above-
mentioned EMC instructions.
Warning!
This product may cause high-frequency inter-
ference in a residential environment that may
require screening measures.
Blowers with an in-built frequency converter (FUK):
Devices with an in-built frequency converter meet the require-
ments of the EC "Electromagnetic Compatibility" Directive
2004/108/EC under consideration of EN 61800-3 Category
C2 (industrial environment), taking into account the EMC in-
structions from the frequency converter and the information
in the Elektror operating and assembly instructions.
Warning!
This product may cause high-frequency inter-
ference in a residential environment that may
require screening measures.
A CE conformity assessment with the relevant standards and
guidelines must be carried out in all cases before the start-
up.
4 INSTRUCTIONS FOR OPERATION
AND USE

4.1 Basic information

Please observe the notes on designated use in section 1.1,
as well as the safety guidelines in sections 1.2 to 1.12.
If the rated current of the drive motor is exeeded during op-
eration, check whether the mains voltage and frequency are
14
corresponding to the data of the unit (see nameplate).
After protective shutdowns, e.g. tripping of the motor circuit-
breaker, activation of the PTC evaluation unit by motors with
a PTC resistor sensor, or after a protective shutdown of the
frequency converter during FU applications, the appliance
must not be restarted until the problem has been identifi ed
and eliminated.
For blowers that can not be employed through the entire per-
fomance curve: The motor may be overloaded by low system
resistance (current overload). In this case reduce the volu-
metric fl ow rate.
If the rated current stated on the nameplate is exceeded dur-
ing operation, check whether this is caused by an excessive
fl ow amount of the conveyed medium. In this case reduce
the input dosing.
The blower must not be subjected to vibration or impact
loads.

4.2 Frequency converter operation

A frequency converter is used, allowing a wide range of
speed adjustments. There is only a small, load-related dif-
ference in rpm between idle state and the max. load of the
blowers.
To ensure trouble-free operation of blowers and lateral
channel blowers, it is important that the converter meet
the following requirements:
• Converter output equal to or greater than motor power
output *)
• Converter current equal to or greater than motor current *)
• Converter output voltage equal to rated motor voltage
• The pulse frequency of the converter should be 8 kHz,
since a lower pulse frequency can cause very noisy motor
operation.
• A minimum rotary frequency of 5 Hz should be ensured
with devices suitable for operation with a frequency con-
verter (50 / 60 Hz) and a minimum frequency of 35 Hz
with fast rotating frequency converter devices (> 60 Hz)
depending on the frequency converter type.
• Theconverter must have a connector for a temperature
sensor (PTC-sensor) or a temperature switch (normally
closed contact).
*) Refer to the rating plate for data
The motor can be operated in a delta or star-point confi gu-
ration, depending on the input voltage of the converter.
It is absolutely mandatory to set the converter to the fol-
lowing U/f relation.
U
B
0
f and U = refer to rating plate
B B
If this is ignored, the motor current will increase dispropor-
tionately and the drive motor will fail to achieve its rated
speed.
Warning!
To avoid personal damage, destruction of the
blower or motor overload, a higher frequency
(speed) than the frequency (f
rating plate must never be set on the converter
otherwise the motor may be overloaded or the
blower destroyed due to the increased speed. The
temperature sensors are connected to the corre-
sponding converter inputs to protective the drive
motor. Single-phase alternating current motors
are not suitable for converter operation.
It is absolutely essential that you observe the
installation and safety instructions described in
the respective operating or application manuals
provided by the frequency converter supplier to
guarantee a safe and trouble-free operation.
It is also important to note that special ambient
conditions may lead to a high level of contamina-
tion of the cooling fi ns with the FUK devices. The
frequency converter switches off if the cool-
ing output on the cooling fi ns is not adequate.
Regular cleaning is required for devices in these
environments.
Note!
The following times apply for the respective
device motor output class (see rating plate) with
run-up/expiry as well as speed changes in order
to to avoid high component loads and faults in
the converter operation:
www.elektror.com
Prohibited
range
f
B
) specifi ed on the
B