Phase Sequence Trip
Started by rahuljadhav1, Feb 18 2008 05:13 AM
1 reply to this topic
#1
rahuljadhav1
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Posted 18 February 2008 - 05:13 AM
Dear All
Why a DC drive trips with Phase shift fault when the I/P R-Y-B (3 ph.mains) sequence to drive input is not in that order?
#2
marke
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Posted 18 February 2008 - 05:51 PM
Hello rahuljadhav1
The input of the DC drive includes a phase controlled half bridge rectifier.
Some designers design the operation of this phase control bridge to be phase sequence immune, and others do not. It can be done either way.
If the phase references are taken phase to phase, then phase sequence is important. If the references are taken phase to neutral, then they are not.
Best regards,
The input of the DC drive includes a phase controlled half bridge rectifier.
Some designers design the operation of this phase control bridge to be phase sequence immune, and others do not. It can be done either way.
If the phase references are taken phase to phase, then phase sequence is important. If the references are taken phase to neutral, then they are not.
Best regards,
Mark Empson | administrator
Skype Contact = markempson | phone +64 274 363 067
LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | Soft Starters
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