Chenelec Reconstituted Mica Pulse Capacitors
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Specification Data:
-------------------
    Values:  0.125uFd, 0.100uFd and 0.090uFd +/-2% (non polarized)
   Voltage:  10,000VDC (7,000VAC)
  Datecode:  1997 and 1998
      Temp:  -55C to +125C
Continuous:  5.0A RMS (that's 35kw!)
   Impulse:  4,000A peak

      Size:  4.75" wide x 2.0" thick x 5.5" tall
    Weight:  ~3.6 lbs (1565gms)
     Color:  green and a few blue

 Connector:  2ea Brass strips 3.25" long x .2" wide with 3ea 8/32 holes

Leakage Dynamic Measurement:
----------------------------
Measured leakage at 10,000vdc:  ~0.1ua or less (several units)
(the leakage was less than this at lower voltages)

How to Measure Leakage:
-----------------------
Leakage measurements are done using a calibrated HV DC supply with
ultra low ripple.  One terminal of the capacitor is connected to the
+HV lead and the other terminal goes to a DVM set in the 100uA scale,
then to ground (the return on the HV supply).  It is imperative that
the DVM be on the ground side!  It is also important to remember that
the charging current can easily exceed the fuse rating on the DVM.

The capacitor is charged up to its rated DC voltage and the charging
current monitored for as long as an hour.

Ideally, in a perfect capacitor, the charging current will go to zero.
In the real world, the internal leakage looks like a high value resistor.

At 10,000VDC, a terminal charging current of 0.1uA is the equivalent
of a  100,000,000,000 ohm (100KMohm) internal resistor.

ESR Measurements:
----------------
The ESR (Effective Series Resistance) is of great concern in an AC
environment since the entire peak to peak charge is exchanged every
cycle, so any losses are directly translated to heat.  DC environments
are less affected since we charge the cap up with DC ... although with
enough power and fast enough RSG, the higher rep rates can easily
exceed the typical 60Hz or 120Hz AC system (but with presumed better
performance since there are no sync problems).

Static Measurements:
--------------------
Meter:  B&K 878 Universal LCR Tester
        (all tests conducted in parallel mode)

(Q is the reciprocal of D)

Measured Capacitance Parameters:
--------------------------------
At 1KHz:
	C = 101.4nf
	D = 0.002  (Dissipation Factor ... lower is better)
	Q = 401.0  (Quality Factor ... higher is better)

At 120Hz:
	C = 101.9nf
	D = 0.001  (Dissipation Factor ... lower is better)
	Q = 630.0  (Quality Factor ... higher is better)

Formulas:
---------
D = 1/(2*PI*F*C*R)
Q = 1/D

(From the data, the B&K meter was working at its effective
leakage measurement limits here ...)

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High-end HP4263B LCR Meter Measurements of a 0.125uFd cap:

  Freq	 Value	  D	ESR
    Hz	  nF		ohms
-----------------------------
   120	122.22	.0028	0.031
  1000	121.70	.0029	3.750
 10000	121.26	.0030	0.397
100000	122.13	.0042	0.057

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