Paul,

Mine is not a standard test but see if it helps in your
case. We use impedence analyser or certain LCR bridge (e.g.
HP4284A) to measure the phase angle. In the AC phasor
diagram, the DCR vector is at 0 deg, the XL vector is at
90deg, the XC vector is at -90deg. If the DCR is small, an
inductive coil should have the phase angle close to 90deg.
With the intra-winding capacitance, the angle will be
dragged down. This simple principle may help you to
calculate the exact capacitance.

K.K. Chin
Artesyn Technologies
www.artesyn.com



From: Paul Orlando <[log in to unmask]> AT NetMail on
      08/18/98 11:30 AM EDT

To:   [log in to unmask] AT NetMail@ccmail2
cc:    (bcc: KK Chin)
Subject:  [TN] Testing of transformer coils