Phase meter or ?

ID: 355644
? Phase meter or ? 
21.Aug.14 22:49
13

Moisés Piedade (P)
Articles: 13
Count of Thanks: 4
Moisés Piedade

One of my PhD students that worked for a power company, offered me an old equipment that seems to be a Phase meter or a similar thing . The dial of the instrument is graduated from 0 to 70 in each direction clockwise and counter clockwise. It seems to be graduated in degrees. Instrument was fabricated in 1903 by Con, Elec. Co  and have the serial number 1487. In top it has three terminals and the letters I and Q engraved. Instrument has four coils two for currents (small number of turns of thick wire) and two for voltages (about 400 turns of 0.12 mm wire). I don’t know for what purpose this instrument was used but seems to be a phase meter between voltage and current. The motor is a magnetized bar connected to the aiguille of the meter.   Please if you have an idea of the application of this old instrument, please let me know.

Best Regards

Moisés

Attachments:

To thank the Author because you find the post helpful or well done.

 2
Galvanometer for Telegraph 
21.Aug.14 23:56
13 from 3594

Bernhard Nagel (D)
Officer
Articles: 1681
Count of Thanks: 6
Bernhard Nagel

Most probably the shown instrument is a (differential) galvanometer for checking telegraph lines. The deflection to the right or left of the normally centered needle indicates the current direction in the wire. Also the strength of the current flow can be measured by the deflection value.

Here are two similar instruments listed in RMorg: a Siemens Galvanometer and one Galvanometer from the Swiss manufacturer Hasler.

The British Museum of Technology has some galvanometer instruments displayed and described.

Please make a new model suggestion for it, thank you.

To thank the Author because you find the post helpful or well done.

 3
Phase meter or? 
22.Aug.14 15:40
79 from 3594

Moisés Piedade (P)
Articles: 13
Count of Thanks: 8
Moisés Piedade

 

Many thanks Bernhard.

Now I understand the working principle of the instrument; it has letters I and Q also engraved, like the 1930 Siemens differential galvanometer in british museum, but this was conceived in 1903. They look veri similar in pictures. I am cleaning it and repairing because one coil was broken.

Best Regards

Moises

 

To thank the Author because you find the post helpful or well done.