EMAIL SD-M 3 Phase Meter test & clean & EMMCO restore (Part 2)

Running the 3 phase EMAIL SD-M Watthour meter on single phase and testing it's accuracy, the results were good.
3 Phase, 66.6 Rev/Kwh, 10-60 Ampere, 4 Wire, 50 HZ, 240 V
Manufactured in 1986
Adding a Terminal cover to the EMMCO B.A.Z for safety Reasons!

Category:

Science & Technology

Tags:

• Watthour meter
• Collection
• Vintage
• Analog
• Wire
• Test
• Accurate
• Paint
• Replace
• Cover

[Steven715715]

@liam101300 Hmm sorry about that I will pm you the link for you. Youtube wont let me post a link in the comments. :(

[Steven715715]

@liam101300 Hello there it will be nice to see your meter. As for testing the accuracy of your meter hear is a video from RODALCO2007 that may help you answer your questian. Regards Steve

[RODALCO2007]

@BoomBoxDeluxe Accuracy is better with all 3 coils energized as with one coil the meter tends to run 2 to 3 % faster as there is no magnetic flux of the other two coils.

In a 3 phase set up with only 1 phase loaded, the disc still has some magnetic flux to deal with from the other two phases potential coils.

[BoomBoxDeluxe]

Hiya. Good job with that terminal cover. :-D I LMAO'd so hard when I saw that, & it's a perfect fit, too. :-D Spot-on, how cool is that?

In regards to wiring the 3ph meter though, some direct-wired ones will work on only one set of coils energised. My Sangamo Weston S301.1 is such an instrument. I don't need to wire up the other two phases for it to run at the correct speed. In fact, I thought that if I did, it would run three times faster, but what you've just done proves otherwise. :-)

-BBD.

[liam101300]

nice video. i need make one of my EMMCO and my AGL Kwh meter i need help cause i cant work out how to do the accuracy testin on the meters