Moeller Frequency inverters DF Vector frequency inverters DV
Moeller Frequency inverters DF Vector frequency inverters DV
Moeller Frequency inverters DF Vector frequency inverters DV
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For <strong>Moeller</strong> Electric Sales and Support call KMparts.com (866) 595-9616<br />
15/30<br />
Description<br />
Motor chokes<br />
DEX-LN..., DEX-LM3...<br />
<strong>Moeller</strong> HPL0211-2007/2008<br />
http://catalog.moeller.net<br />
<strong>Frequency</strong> <strong>inverters</strong><br />
<strong>Vector</strong> <strong>frequency</strong> <strong>inverters</strong><br />
Part no. overview<br />
DEX-LN1...<br />
Mains chokes, single-phase<br />
DEX-LN3...<br />
Mains chokes, three-phase<br />
Application<br />
Mains chokes – also called commutating chokes – are connected in series on the<br />
mains input side of electronic equipment e.g. <strong>frequency</strong> <strong>inverters</strong>.<br />
Function<br />
Mains chokes limit the inrush current and dampen current harmonics and any<br />
additional current peaks. By dampening the harmonic currents, the r.m.s value of<br />
the input current can be reduced by up to 30 %. In addition, they allow the often<br />
mandatory short-circuit voltage (k value) of about 4 % to the mains.<br />
Mains chokes extend components’ lifespan (rectifier diodes, DC link capacitors) on<br />
equipment with input-side DC link (<strong>frequency</strong> <strong>inverters</strong>, UPS).<br />
Features<br />
The mains chokes are vacuum-impregnated for low-noise operation. They offer lowfatigue,<br />
magnetically and metallically neutral air-gap bypasses.<br />
Because of their flux distribution, the clearance to metal parts and neighbouring<br />
components must be at least 50 mm.<br />
Part no. overview<br />
DEX-LM3...<br />
Motor chokes, three-phase<br />
Application<br />
Motor chokes are used on the output of the <strong>frequency</strong> <strong>inverters</strong> in series with the<br />
motor.<br />
Function<br />
Motor chokes reduce the slew rate of the output voltage (/ < 500 V/ms) as well as<br />
motor noise and heating.<br />
The use of motor chokes enables the permissible motor cable lengths to be extended<br />
up to 200 m.<br />
With parallel operation of several motors from the output of a <strong>frequency</strong> inverter the<br />
use of motor chokes is recommended. They reduce the higher capacitive reactive<br />
currents.<br />
Features<br />
The motor chokes are vacuum-impregnated for low-noise operation. They offer lowfatigue,<br />
magnetically and metallically neutral air-gap bypasses.<br />
Because of their flux distribution, the clearance to metal parts and neighbouring<br />
components must be at least 50 mm.<br />
Documentation<br />
Installation instructions are supplied with each choke. The documentation is also<br />
available on the Internet:<br />
www.moeller.net/support
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