1 members (Scott35),
518
guests, and
16
robots. |
Key:
Admin,
Global Mod,
Mod
|
|
|
Joined: Apr 2002
Posts: 257
OP
Member
|
I bought a new meter today that has rotation indication. I've had them before but never knew what the letters R, S & T stand for. I know the phases by A, B & C.
|
|
|
|
Joined: Feb 2005
Posts: 693
Member
|
R.T.F.M.*
*Read The Manual
Larry Fine Fine Electric Co. fineelectricco.com
|
|
|
|
Joined: May 2003
Posts: 2,876
Member
|
ABC = RST just a different set of letters for a sequence, I'll make the assumption that this is a Hotek or Hioki meter? And will also assume that the leads are red-white-blue, instead of black-red-blue?
Japanese made? Nothing wrong with that, I believe it will have the international symbol for clock-wise, of an arrow going 'clock-wise'.....
Mark Heller "Well - I oughta....." -Jackie Gleason
|
|
|
|
Joined: Jul 2002
Posts: 8,443 Likes: 3
Member
|
I believe that RST is a European convention, they also used to use UVW as well. I don't know a whole lot about the origins, maybe someone like Pauluk can clarify this?.
|
|
|
|
Joined: May 2003
Posts: 2,876
Member
|
Reminds me of that guy who wired a cord cap XYN, when it was suppossed to be XYZ.
Mark Heller "Well - I oughta....." -Jackie Gleason
|
|
|
|
Joined: Dec 2001
Posts: 2,498
Member
|
That's old European designation. I believe the terminals of a motor leading directly to the windings were/are XYZ, the terminals fot the feeder are UVW, and going backwards in the alphabet, the terminals inside receptacles et cetera were named RST. Has been L1, L2 and L3 for some 20 years though, at least in Continental Europe. My school (built in 1975-1980) still has the old designations written everywhere. After all, it still has fuses instead of breakers too...
|
|
|
|
Joined: Aug 2001
Posts: 7,520
Member
|
Yep, I remember seeing the RST designations on some older European equipment years ago. We never used that scheme in Britain: Everything was either A/B/C, L1/L2/L3, or R/Y/B, the latter being for our standard phase colors: red/yellow/blue.
|
|
|
|
Joined: Apr 2001
Posts: 449
Member
|
Check out an Ideal 61-521 phase rotation meter. Red, yellow and blue phase indicator lights are also marked R, S, T. I never did know what RST stood for.
|
|
|
|
Joined: Oct 2000
Posts: 2,723 Likes: 1
Broom Pusher and Member
|
Larry Fine: R.T.F.M.*
*Read The Manual
LOL!!! I remember it as: " Read The Fu.... er... Funny,... ya that's it Manual. Scott35
Scott " 35 " Thompson Just Say NO To Green Eggs And Ham!
|
|
|
|
Joined: Dec 2005
Posts: 869 Likes: 4
Member
|
R, S, T are the older European indications for 3 Phase equipment.
RST are the 3Ø supply phases. UVW is start, for star delta motor starting. XYZ is run for polyphase motors.
Now been superseaded with L1, l2, L3
The product of rotation, excitation and flux produces electricty.
|
|
|
Posts: 1,158
Joined: May 2003
|
|
|
|