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GE Capacitors
Capacitors for High Current,
Power Semiconductor,
and DC Applications
CPD 513
Rev. B
3-00 5k
GE TD&IS
Transmission, Distribution & Industrial Systems, Fort Edward, NY 12828
GE Capacitors for High-Current, Power
Semiconductor, and DC Applications
Capacitors for Power Electronics require special high-performance designs for the
varied applications. This catalog describes capacitors for a number of demanding
applications where high currents and/or high voltages are common. Given the special
nature of these applications, care must be taken to ensure that the capacitors are
correctly applied. Information is included to help with the more common application
conditions. An Application Data Sheet is also provided to enlist the help of GE’s
Application Engineers. Please use this sheet if you need assistance or want to verify
your own calculations.
Table of Contents
Page
Application Data Sheet
Descriptive Information
tion
SCR Commutation
Capacitors
2
3
Description
Sheet for submitting data to GE for review
General Information on capacitor construc-
4
High and very high-current applications,
such as SCR commutation, SCR and GTO
snubbers, and high-frequency AC circuits
High microfarad per unit volume designs for
up to 250 V peak. Used in high-frequency
chopper circuits
Medium current snubber capacitors for
Semiconductor circuits
Derating information for Current Pulsewidth
and Temperature. Worked examples for
common conditions
DC Capacitors for voltages up to 2500 V
Metallized Polyester
SCR Capacitors
7
Snubber Capacitors
Power
Application Data for SCR
and Snubber Capacitors
9
11
General Purpose DC
Capacitors
Mounting Hardware
13
15
Brackets for mounting capacitors
©
2000 GE Company
1
Capacitor Application Data Sheet
To ensure correct selection of a capacitor for
your application, please provide the information
indicated below. This sheet may be duplicated
or additional copies may be obtained from GE.
Of particular importance are the voltage and
current waveforms complete with values of
voltage and current over a complete cycle.
PRIMARY INFORMATION (Essential)
Company Name______________________________Tel No. (Incl. Country & City codes) _______________________
Address________________________________________________________FAX No. __________________________
Person to contact:______________________________________________
1. Application: _______________________________________________________
2. Capacitance:________________________ Tolerance:____________________
3. Peak Voltage: _____________________RMS Voltage: ______________________Voltage Reversal(%)________
4. Peak Current: ________________________RMS Current: ______________________
5. Transient Voltage: ________________ Duration: ___________Freq. of Occurence: _______________________
6. Frequency or Repetition Rate (Hz): __________________Duty Cycle: __________________________________
7. Ambient Temperature: ________________Max.: _______________Min.: ______________
8. Capacitor Charge Time: ________________Discharge Time: _____________________
9. Required Operating Life (Hours): _____________________________________________________
10.Waveforms:
+
Voltage
0
-
+
Current
0
-
Time
Time
Send this data to your local GE Sales
Office or directly to:
General Electric Company
Transmission Systems
381 Broadway
Fort Edward, NY 12828-1000, U.S.A.
Attn: Industrial Capacitor Sales
FAX: (518) 746-5524
SECONDARY INFORMATION (Provide as Appropriate)
11. Physical Size Limitations: _________________________________________________________________
12. Mounting Requirements: __________________________________________________________________
13. Applicable Specifications: _________________________________________________________________
14. Type of Cooling Available: _________________________________________________________________
15. Unusual Atmospheric Conditions: ___________________________________________________________
16. Other Special Requirements: ________________________________________________________________
17. Potential Usage: ______________________________
©
2000 GE Company
2
Film/Foil Electrode Construction
Film/Paper Foil Construction
Polypropylene Film
Polypropylene Film
Foil
Polypropylene Film
Polypropylene Film
Foil
Polypropylene Film
Paper
Foil
Polypropylene Film
Paper
Foil
GE’s Foil Electrode
capacitors are manufactured
with sheets of high quality aluminum foil as the
electrodes. The dielectric consists of two sheets of
polypropylene film. The film is manufactured in GE’s
own Capacitor Materials Operation. It is specially
designed with a rough surface to allow full impregna-
tion by the dielectric fluid. The aluminum foil elec-
trodes extend, one on each end of the capacitor roll,
so that a solder connection can be made. Depending
on the typical current for the type of capacitor, the
internal connections from the roll ends to the termi-
nals are either braided cables or tin-plated copper
straps. This construction provides capacitors that are
inherently capable of handling high RMS and peak
currents.
GE’s Film/Paper/Foil
capacitors are manufactured
with high grade film and foil, and capacitor grade kraft
paper. They are typically high voltage DC rated and
are treated with Geconol capacitor dielectric fluid.
These capacitors are exposed foil construction for
use in snubber and or DC filtering applications.
DIELECTRIC FLUIDS
All of GE’s dielectric fluids are chosen for
specific characteristics that match the other
components in the capacitor dielectric system and the
applications for which the capacitors are intended.
Each fluid is based on one or two major
constituents and blended with proprietary
additives for optimum performance.
Dielectrol VII
A Benzyl Toluene-based fluid, used for film/foil
high current products.
©
2000 GE Company
3
SCR Commutation Capacitors
A97F8600 / A97F8700 Series
600 to 1500 Volts Peak
This family of capacitors is designed for high-current applications, such as
(1) SCR commutation, (2) snubbers for SCRs, GTOs and other power
semiconductors, and (3) for any other circuits where the combination of
frequency and voltage results in high RMS currents. An Application Note is
provided to assist in the proper use of these devices. It is strongly recom-
mended that users refer to GE engineers for assistance if there are any
questions as to the correct selection of capacitors. The A97F8600/
A97F8700 Series have an all-film dielectric and, due to the much lower
dissipation factor, can handle much higher currents than the older film paper
designs.
Advances in capacitor Dielectric technology have made paint
unnecesary, in most cases. This along with GE’s commitment to
environmental programs has led to the elimination of painted cases in
this product line. Removal of the paint has minimal affect on the RMS
current ratings; see the standard ratings charts for proper application.
SPECIFICATIONS
Available Capacitance Range:
Capacitance Tolerance:
Capacitance Variation with Temperature:
Rated Voltage:
1 to 50 µF
± 10%
± 3% from -55 °C to +85 °C
See Ratings Tables. Rating is the Maximum Peak voltage
permissible in either polarity.
See Ratings Tables. The value given is for derating purposes
only. Refer to the Application Note on Page 12 to determine
the required derating. In no circumstances should the RMS
Current rating of the terminals be exceeded.
-40 °C to +75 °C
-55 °C to +90 °C
40,000 hours with 95% survival with proper derating
0.02% maximum
Oval Case & Cover:
Rectangular Case & Cover:
Unpainted Aluminum
Unpainted Steel
Rated Current:
Operating Temperature:
Storage Temperature:
Operating Life:
Dissipation Factor:
Case Material/Finish:
Terminations/Hardware:
1/4 - 20 screw thread studs (60 A RMS maximum)
3/8 - 16 screw thread studs (100 A RMS maximum)
Case Styles C* and D* have 100-A terminals.
Nut and washer hardware is supplied in bag
A97F8600/ A97F8700 series:
Dielektrol VII
Dielectric Fluid:
Internal Protection:
These capacitors do not contain an internal protection
mechanism. The user is responsible for ensuring that the
capacitors are correctly applied for safe use.
©
2000 GE Company
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