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« on: April 08, 2007, 04:19:22 AM »
Today I measured a ST 10 KW head for the winding resistence and inductance.
Utilized a Fluke 189 for resistence. ( Corrected for meter lead loss.) Sencore LC 53 for the inductance measurements. All windings disconnected, rotor, ( Field) measured from common on the brush block.
Z windings, (feeding rectifier)-Resistence 3.23 ohms. Inductance-21.8 mil-Henrys.
Field windings, (at brush block common) Resistance 25 ohms Inductance 1.43 Henrys.I rotated shaft to insure brush contact.
Output windings (Stator) Resistence L1 to Neutral -.19 ohms, L2 to Neutral, .17 ohms. Note better meters are available to measure fractional ohms.
Output windings Inductance L1 to Neutral -1.52 mil-Henrys, L2 to Neutral-1.52 Mil-Henrys.
Some where some one wanted the resistence and some where else some one wanted the inductance.
Hpoe this helps.
"tiger" John sends