Elektror RD 14 F, Инструкция по эксплуатации и сборке, Страница: 17 / 28

17
U
B
0 f
B
Prohibited
range
EN
Operating and assembly instructions RDF www.elektror.com
9016315 01.20/12
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
• Supply voltage max. 480V, including 5% voltage tolerance
• The pulse frequency of the converter should be 8 kHz,
since a lower pulse frequency can cause very noisy motor
operation.
• The values for the maximum/minimum frequency can be
found at 1.13.
• The converter 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 con
fi 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.
f
B
and U
B
= refer to rating plate
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
B
) speci fi ed on the
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 o ff 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:
Device motor output
Run-up time
[s]
Expiry time
[s]
Motor output < 0.25 kW 5 10
0.25 kW < Motor output
<=3.0 kW
10 20
3.1 kW < Motor output
<= 7.5 kW
20 40
7,6 kW < Motor output
<= 11.0 kW
30 60
11,1 kW < Motor output
<= 30.0 kW
30 100
A uniform run-up and expiry must be guaranteed within the
run-up and expiry times.
No speed changes must occur during operation that exceed
the speed change during run-up and expiry.
Protection by residual-current-operated circuit breaker
(FI circuit-breaker):
The present IGBT frequency converters produce discharge
currents of >=3.5 mA due to their design principle. These dis-
charge currents can lead to unwanted tripping in systems
protected by a 30 mA-FI circuit-breaker.
If a fault occurs, fault currents can also discharge through the
PE conductor as direct current. If protection is needed on the
supply side by means of an FI circuit-breaker, then an ACDC
sensitive (type B) FI circuit-breaker must be used. Use of an
FI circuit-breaker other than type B can cause death or seri-
ous injury if a fault occurs. To meet the EN 61800-5-1 stand-
ard, the PE conductor must be duplexed and routed through
separate terminals or have a cross-section of at least 10 mm²
Cu.
Operation and connection to public grids:
See 3.5
4.3 Hydraulic Motor Operation
The run-up and expiry times as well as the speed changes
speci fi ed in 4.2 should be noted when operating with hydrau-
lic motors. Free-running hydraulic motors should be used to
guarantee a smooth run on.
5 INSTRUCTIONS FOR MAINTENANCE
Wearing parts are subject to the recommended maintenance
intervals (refer to 5.1 to 5.6). The service life of wearing parts
(ball bearings and fi lters) depends on the operating hours,
the load and other in fl uences, such as temperature, etc.
Maintenance and servicing may only be performed by per-
sons with the necessary expertise and regular training. In ad-
dition to the appliance’s operating instructions and the regu-
lations and recommendations for the system as a whole, the
following points should be observed:
Inspection and maintenance intervals:
The operator must set the cleaning, inspection and mainte-
nance intervals himself according to operating hours, load
and operating conditions.
Immediate inspection and maintenance
The blower must be inspected immediately if vibrations or
reduced air fl ow are observed.