Product code: OD-IL121-xx / OD-IL221-xx / OD-IL143-xx / OD-IL243-xx / OD-IL343-xx / OD-IL121-xx-I55 / OD-IL221-xx-I55 / OD-IL163-xx-I55 / OD-IL263-xx-I55 OD-IL363-xx-I55
Reduce supply harmonic distortion and protect Optidrive against harmful supply disturbances
Most types of drive products create supply harmonic distortion
owing to the configuration of the power input circuit. Input chokes
are used to reduce the effects of the Optidrive upon supply harmonic
distortion (see below).
Input chokes are also used to protect the power input circuits of the
Optidrive against voltage spikes which might originate from lightning
strikes or other equipment on the same supply. Small power
Optidrives are particularly susceptible to this on certain supplies
where lightning occurs or if there are other power electronic devices
which cause notching on the supply ie welders, dc drives etc.
Input chokes are available for Optidrive size 1, 2 and 3.
Optidrive sizes 4, 5 & 6 include 3 phase line chokes as part of the
products basic design, this significantly improves the robustness of
these products and is a key specification benefit.
A range of input chokes for 12 pulse systems are available on
request.
The graph shows the effect of using an input choke on typical 4kW/ 5HP drive. The 50Hz current is used as a reference and is the current which delivers the useful power to the motor. The reduction in the total effective (RMS) current is clear.
Specification - IP20
Specification - IP55
