Download Electronicon Capacitor Datasheet

Standard Capacitors
Ratings & Dimensions
Part No.
kVAr @
kVAr @
415VAC
525VAC
275.546-703803
6.25
10
3×38
3×11
275.176-707700
12.5
20
3×77
275.398-715401
25
40
3×154
Cn (µF) In
Imax
D1(D2)xL1 (mm)
Dimensions
Weight Resistor
(kg)
Module
3×18
75(79.5)×230
1.0
Included with
Capacitor
3×22
3×36
100(104.5)×230
1.7
275.100-10180
3×44
3×72
136(140.5)×245
3.7
275.100-10120
General Data (All Standard Capacitors)
D2
Operating Voltages: IEC 831
24 hours/day……………………. 525V
8 hours/day……………………... 580V
30 min/day…………………….... 600V
5 min/day.....................………… 630V
1 min/day................................... 680V
Max. peak rating.......................1600V
Capacitor Losses:
Dielectric (Winding)................<0.2 W/kVAr
Total Capacitor.................0.25~0.4 W/kVAr
Life Expectancy:
IEC 831 Temp. Class “D”..............100,000h
IEC 831 Temp. Class “C”..............130,000h
Test Voltages (IEC 831-1):
Between terminals..................... 1130V AC/2sec.
Between terminals and Case..... 4500V AC/2sec.
L1
16
M12
D1
Complying to the following Standards:
IEC60831(2003), VDE 0560-46/47
CSA C22.2 No. 190-M1985
UL Standard No. 810
GOST 1282-88
Miscellaneous
Temperature Range/Class...................................... -40°C to IEC831 Class C/D
Internal Connection................................................. Delta
Rated Frequencies.................................................. 50/60Hz
Filling Material......................................................... Nitrogen Gas
Tolerance of capacitance........................................ ± 5%
Protection against electrical faults........................... Self healing dielectric & overpressure device
Protection against accidental contact...................... IP20 Terminals
Altitude.................................................................... 4000M
Internal Protection.
The dielectric structure used in the capacitors is self healing. If there is a puncture in the insulation between the
metallic layers due to a voltage transient, then a short circuit will develop (1). This will cause a very sudden and local
temperature rise that will vaporize the surrounding metallic layer and generate Pressure (2). This will get rid of the
short circuit and the pressure will push apart the metallic layers to further establish the insulation (3). The puncture in
the insulation is typically the size of a pin prick The capacitor remains fully functional after the event.
Metallic Layer
Dielectric (Insulation)
BAM - Break Action Mechanism
When the capacitor has come to the
end of its life or is subjected to high
temperatures or overvoltages that
surpass its ratings, the pressure build
up in the capacitor due to the self
healing process will be such that the
capacitors Break Action Mechanism
(BAM) will operate. The pressure will
force the lid up which will break the
prepared links thereby isolating the
capacitor from supply. This will prevent
the capacitor from bursting.
(1)
(2)
(3)
Short circuit
Metallic layer vaporized
Short Circuit cleared
Principle of the Break Action Mechanism
Terminal
Lid
Crimp
Break Action
Spot.
To ensure correct operation of the
Break Action Mechanism, there should
be a 35mm clearance above the
terminals.
Electrical connections to the terminals
should be with flexible cable or copper
braid.
Using the terminal, lid or crimp part of
the capacitor should be avoided when
mounting the capacitor otherwise the
break action mechanism may not
operate.
Capacitors consist mainly of
polypropylene. They may rupture and
ignite as a result of internal faults or
external overload e.g. temperature,
overvoltage, harmonic distortion.
Appropriate design measures must be
taken to ensure that the capacitors do
not form a hazard in the event of a
failure of the safety mechanism.
Capacitor before the
functioning of the BAM
Capacitor after the
functioning of the BAM
Construction Details
Dielectric
The dielectric is made up of two layers of metallized polypropylene film. A thin self healing mixture of zinc and
aluminium is metallized directly on one side of the film under vacuum. The film is wound into rolls and the ends are
sprayed with a metal contact layer. This allows a transfer of high currents and ensures a low inductance load
connection between the terminals and the windings.
Casing
Winding element
The winding elements are
placed in aluminium cans
and then hermetically
sealed. The silver colour of
the cans will help prevent
the capacitor from absorbing
heat from other sources like
reactors, contactors, etc.
Polypropylene film,
uncoated
Sprayed metal contact layer
Polypropylene film, metal
deposit on one side.
Filling Materials
Filling materials contained within capacitors are necessary because they protect the capacitor electrodes from
oxygen, humidity and other environmental interference. Without such protection, the metallized coating would
corrode and reduce the amount of capacitance. This would lead to early capacitor failure. Electronicon use an
elaborate vacuum drying procedure immediately after the winding elements have been inserted into the capacitor
case.
The heat transfer properties of an oil filled capacitor are better than the gas filled but mounting options are
restrictive. Gas filled capacitors can be mounted in almost any position (except where the terminals point
downwards) and are approximately 15% to 20% lighter.
There is little risk of leakage because the capacitors are hermetically sealed. Should there be a leakage, the filling
materials are non toxic and inert.
Environmentally friendly
Electronicon capacitors do not contain polychlorinated biphenyl (PCB), solvents or any other toxic or banned
substance. They are not classed as dangerous goods and do not present a danger to health or the environment. If
the break action mechanism has operated, care must be taken when disposing of the capacitors because the
capacitor may still be charged even after weeks have passed.
NHP now sources its capacitors from Electronicon.
ELECTRONICON Kondensatoren GmbH (former RFT
Kondensatorenwerk Gera) have been associated with the
manufacture of capacitors in Gera since the late 1930s,
when the SIEMENS organisation moved part of their
production facility from Berlin to eastern Thuringia in the
heart of Germany.
Since then, the company has extended considerably.
Highest quality and reliability of all products have been the
core of our philosophy from the very start. Continual
development in its product ranges has resulted in
ELECTRONICON becoming one of Europe's leading
capacitor manufacturers supplying customers worldwide.
The company employs about three hundred and thirty
qualified engineers and skilled workers in its manufacturing
facilities, producing capacitors for lighting, motor, and power
electronics applications, further components, modules and
capacitor banks for power factor correction.
Regular investment in advanced and environmentally sound
technologies guarantees the highest level in manufacture
and quality to modern standards which are approved by
standard authorities all over the world.
The ELECTRONICON system of quality assurance has been
approved by the TÜV organisation to DIN EN ISO 9001.
Since 1985 the company has also been in a position to
offer metallized dielectric material complying with the highest
technical standards. This guarantees an uninterrupted
qualitycontrol of all relevant manufacturing stage.
Features
Benefits
Gas filled Capacitors
-Mount in almost any position
-15% to 20% lighter
-Less maintenance than oil filled capacitors
Elaborate Setup for manufacturing,
drying & sealing the dielectric into
the aluminium case under vacuum
-Purges the capacitor of any oxygen or moisture
that can cause internal deterioration and early
failure.
Self healing dielectric
-Capacitor can repair itself if there is a small break down
in the insulation due to temperature & overvoltages.
Over pressure device
-Prevents the capacitor from bursting and igniting if the
capacitor is exposed to high temperatures and over
voltages.
Touch proof terminals (IP2X)
-Prevents accidental contact with capacitor terminals
-Fast and easy method for connecting cables
-Spring mechanism ensures reliable connection
Single mount stud
-Quick and easy mounting of capacitors
Modular resistor block
-Quick and easy connection of discharge resistors
Environmentally friendly
does not contain PCBs
-Capacitors are easy to dispose of and won’t
harm the environment.
Wave like edge on the dielectric
-Higher transfer of current
wound into thick coils
-less stress on the capacitor