HISTORY:
This component has been pulled from a very nice (fully functioning) KEPCO BOP 50-8M!
Why "part out" the KEPCO? I have decided to make this equipment an "organ donor" because I have had it advertised elsewhere as a fully functional unit but no interest, too "high brow" I guess.
Additionally it is VERY HEAVY (this is a FULL rack size unit, approaching 40Kg when it was packed) and I noticed light damage to the steel casing as well (scrape marks due to moving it around over the years).
Originally we acquired this equipment from an international R & D laboratory and used it ourselves for various test and research tasks, although the BOP range of Bi-polar power supplies can undertake many other tasks.
In brief, the KEPCO BOP 50-8M is a Bi-polar power supply providing 0-50V dual supplies at up to 8A current each.
But to be more specific it is much more than a Bi-polar power supply, the unit contains two high speed, high power Op amps and NO capacitors on the output (which can effect the frequency response/speed). The Op amps can operate up to 24Khz (resistive loads) with Ultra low noise, Ultra low ripple and they are MIL spec compliant.
The power Op amps are four quadrant, bi-polar operation with full control of the voltage and current on each channel via the front panel controls OR remote control/programming.
This KEPCO BOP 50-8M is not a "spring chicken", date of manufacture was in the late 1990's - not used very often but when it was called upon, it never missed a beat.
KEPCO designs and manufactures some wonderful professional laboratory and industrial power test equipment, take a look HERE for their latest offerings
The company began around the mid 1940's in Queens, New York along with two other very well known power supply design/manufacturing companies Sorenson and Lambda. Of the three companies, only KEPCO remains in Queens and remains an independent company.
So, that is the background of this component and now let's get down to describe the component or module I have carefully extracted from the equipment, and where feasible/worthwhile, tested to ensure full functionality.
PHILIPS - Electrolytic Capacitor
Physical: Can style (supplied with clamp, brass terminal nuts and all mounting hardware)
Series: 117-0907
Type #: 3186FE123U100BPA2
Value: 12000uF (-10 ~ +75% tolerance)
Voltage: 100V DC (125V DC Surge)
85C Ambient temperature maximum
Safety vented
DIMENSIONS:
107mm height x 63mm diameter
Add 8mm to the height for the terminal nuts
Weight: 400g
COSMETIC CONDITION:
As New (but USED)
NO bulging or other nasties
NO can deformities
Clean (including the terminals/nuts/washers)
TESTING:
This is what really matters, how does it perform after all these years?
While in the KEPCO BOP 50-8M this capacitor has 75V sitting across it, directly from the bridge rectifier so it has never been stressed as it has been running well under the maximum working voltage.
Capacitance test results:
Capacitor A: (manufacturer has 13 stamped into the top seal) 13040uF
Capacitor B: (manufacturer has 2 stamped into the top seal) 12860uF
Both capacitors are well within specifications
As an "ultra cautious" precaution, I have placed a shorting jumper (Red wire) across the terminals to prevent stored voltage shock, when fully charged with say 100V they can give a very nasty "bite" - of course, remove the jumper prior to use (obvious but you never know ...)
