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sandeep waingankar
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Join Date: Mar 2009
Location: goa
Posts: 1

Toshiba VF S9 inverter

03/15/2009 5:31 AM

Toshiba VFD trips on earth fault immediatly on receiving a start command. What could be the reason for tripping.

Somene pls. suggest

Sandeep Waingankar
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ffej
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Join Date: May 2007
Location: Geelong, Australia
Posts: 1084
Good Answers: 54
#1

Re: Toshiba VF S9 inverter

03/15/2009 10:50 PM

It could be that you have an Earth fault.

Check your motor and associated leads. If possible substitute another motor and leads.

Check the motor is wiired correctly.

Check if it happens when no motor and leads are connected.

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PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#2

Re: Toshiba VF S9 inverter

03/16/2009 4:30 AM

Yep. It's an earth fault.

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aikhh
Power-User

Join Date: Mar 2009
Posts: 130
#3

Re: Toshiba VF S9 inverter

03/18/2009 2:21 AM

First you read the message at the display,i think this informatio is very useful for you in order to further steps to trace the caused.
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ashelec
Active Contributor

Join Date: Jan 2007
Location: Bangalore,karnataka, India
Posts: 24
#4

Re: Toshiba VF S9 inverter

03/26/2009 9:54 PM

It might as simple as bad grounding practice. In case you are near a seashore(which I presume you are) this is very prevalent.I have seen similar problems on VFDs in paper plants near seashores.
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vinny_galbo
Member

Join Date: Aug 2009
Posts: 6
#5

Re: Toshiba VF S9 inverter

08/14/2009 6:51 PM

you can try using a ground fault sensor
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vinny_galbo
Member

Join Date: Aug 2009
Posts: 6
#6
In reply to #5

Re: Toshiba VF S9 inverter

08/18/2009 12:28 PM

http://www.clrwtr.com/NK-Ground-Fault-Sensors.htm
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