The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Calling all Non-US members!! (Non-US only)
by aussie240
Today at 02:39 AM
Photo Upload Tutorial
by DanK
Yesterday at 11:35 PM
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
Wow, that was close!
by jraef
11/28/16 07:06 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 13
HotLine1 9
Texas_Ranger 8
sparkyinak 7
Trumpy 6
Who's Online
0 registered (), 100 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#49579 - 03/10/05 06:11 AM 3 Phase Generators
AJA Offline
Junior Member

Registered: 03/04/05
Posts: 2
Loc: Washburn, il
I have an engine drive 22kw induction 3 phase generator, commercially made, which will not generate any voltage. It has been flashed while turning at rated speed and above with 12 and 24 vdc without results. The generator has been removed for the engine and been flashed with the 12 vdc which has pulled the rotor to the field coils. After assembly the unit still does not produce voltage. All help is appreciated.
Thanks
AJ

Top
Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#49580 - 03/11/05 05:38 AM Re: 3 Phase Generators
George Corron Offline
Member

Registered: 05/16/01
Posts: 728
Loc: Lorton, Va USA
AJ,
A little more info would help, there are several ways to make a field. If flashing your field does not produce a voltage, you likely have a bad set of diodes, or something broken/burned in the field. If you've got brushes - replace 'em THEN flash. Is there a fuse in the exciter you missed?

Top
#49581 - 03/11/05 05:43 AM Re: 3 Phase Generators
IanR Offline
Member

Registered: 12/06/04
Posts: 326
Loc: Palm Bay FL USA
May seem like a stupid suggestion but, have you buzzed the windings? I know checking for continuity seems pretty basic but hey gotta look at all scenarios.

Top
#49582 - 03/11/05 05:47 AM Re: 3 Phase Generators
IanR Offline
Member

Registered: 12/06/04
Posts: 326
Loc: Palm Bay FL USA
You din't say but have you verified that the exiter is operating correctly or at all?

Top
#49583 - 03/14/05 04:29 AM Re: 3 Phase Generators
AJA Offline
Junior Member

Registered: 03/04/05
Posts: 2
Loc: Washburn, il
The engine speed has be verified by two difference instruments. The windings provided the correct curve form on a scope. The rotor is laminated material and has no exciter circuit/no diodes. There were no capacitors with the unit.
AJ

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals