Instructions For Operation And Use; Frequency Converter Operation - Elektror HRD Serie Betriebs- Und Montageanleitung

Operating and assembly instructions HRD
Checking the direction of rotation
Switch on the blower. The running direction of the impeller
should correspond to the direction arrow on the housing. If
the impeller rotates in the wrong direction, then interchange
L1 and L3.
Star-delta start-up
Motors with ratings of above 3.0 kw are suitable for star-delta
start-up on the mains supply. For direct on-line starting (high
short circuit current at the instant the motor is energised),
please contact your local utility for details of conditions.
3.4.2 Confi guration for single-phase a.c. blowers
Z2 U2
U1 Z1
L1 N
Clockwise rotation
3.5 Special confi gurations and additional clamps
For voltage interchangeable motors, pole-changeable mo-
tors, FU motors and other special confi gurations of three-
phase a.c. motors and a.c. motors, terminal diagrams are
supplied with the terminal boxes of the motors. This also
applies to the optional thermal winding protection and the
space heater.
3.6 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 qualifi ed personnel,
i.e. not intended for consumers. The manufacturer of the
fi nal system/machine must guarantee/confi rm that the fi nal
system/machine complies with the EMC Directive.
Blowers with mains operation:
With mains operation to a sinusoidal AC voltage, the asyn-
chronous motors with a squirrel-cage rotor that are built into
the devices meet the requirements of the EC "Electromag-
netic Compatibility" Directive 2014/30/EU, taking into ac-
count the standards EN 61000-6-4 (Emitted interference in
industrial environments) and EN 61000-6-3 (Emitted interfer-
ence in residential environments).
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
and assembly instructions are observed in order to meet the
requirements of the EC "Electromagnetic Compatibility" Di-
rective 2014/30/EU.
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.
www.elektror.com
Z2 U2
U1 Z1
L1 N
Anti-clockwise rotation
Blowers with an in-built frequency converter (FUK):
Devices with an in-built frequency converter meet the re-
quirements of the EC "Electromagnetic Compatibility" Direc-
tive 2014/30/EU under consideration of EN 61800-3 Catego-
ry C2 (industrial environment), taking into account the EMC
instructions 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 1.14.
If electrical current drops below the rated current of the drive
motor during operation, check to see if the mains voltage and
frequency match the appliance ratings.
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 trouble-
shooted.
If the blower cannot be operated over the whole range of the
characteristic curve, the motor may overload if the system
resistance is too low (excessive current consumption). The
volumetric air fl ow should be reduced in this case by means
of a throttle valve fi tted on the intake or discharge side.
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 and the lateral channel blower.
To ensure trouble-free operation of blowers and side
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,
because a lower pulse frequency will lead to noisy motor
operation
• The values for the maximum/minimum frequency can be
found at 1.11.
• The converter should have a connection for a tempera-
ture sensor (PTC resistor 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 gura-
tion, depending on the input voltage of the converter.
EN
17