MKV capacitors for power factor correction
MKV series
Series/Type:
MKV400-D-12.5-02 / MKV440-D-15-02
Ordering code:
B25836B4247A305
Date:
August
2006
Version:
1
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Identification/Classification 1:
(header 1 + top left header bar)
MKV capacitors for power factor correction
Identification/Classification 2:
(header 2 + bottom left header bar)
MKV series
Ordering code:
(top right header bar)
B25836B4247A305
Series/Type:
(bottom right header bar)
MKV400-D-12.5-02 / MKV440-D-15-02
Preliminary data (optional):
(if necessary)
Department:
FK PC OH RD
Date: August
2006
EPCOS AG 2006. Reproduction, publication and dissemination of this data sheet, enclosures hereto and the information
contained therein without EPCOS' prior express consent is prohibited.
MKV capacitors for power factor correction
B25836B4247A305
MKV series
MKV400-D-12.5-02 / MKV440-D-15-02
Characteristics
C
R
3 82.9 F 5/+10%
V
R
440 V AC
f
R
50 Hz
60 Hz
Q
R
15.1 kvar
18.1 kvar
I
R
3 20 A
24 A
tan
0
0.2 W/kvar (dielectric)
Maximum ratings
V
max
480 V AC, 8 h daily
570 V AC, 1 min
I
max
3 55 A (T
a
= 60 C, V
R
)
I
s
14 kA
(dv/dt)
max
40 V/s
(dv/dt)
s
100 V/s
Test data
V
TT
950 V AC, 10 s
V
TC
3000 V AC, 10 s
tan
(50 Hz) 0.35 W/kvar (total)
Climatic category
T
min
25 C
Dimensions in mm
T
max
+70 C
Design data
Humidity
Max. relative
Dimensions l
121.6 248 mm (4.79 x 9.76 in)
humidity
95%
Approx. weight
3.1 kg (6.8 lb)
T
stg
-40 ... +70 C
Impregnation
Oil
Mean life expectancy
Fixing
Threaded bolt M12
t
LD
up to 150 000 hours
Mounting hole
14 mm (0.55 in)
Max. torque
10 Nm
Remarks
Terminals
Isolated terminal, IP20
400 V AC, 50 Hz, 12.5 kvar
Max. torque
1.2 Nm
Terminal cross section
16 mm (5 AWG)
Creepage distance
12.7 mm (0.50 in)
Clearance
9.6 mm (0.38 in)
Overpressure
disconnector
Standards
IEC 60831-1/2, EN 60831-1/2, VDE 560-46/47
FK PC OH RD
August 2006
Please read Cautions and warnings and
Page 2 of 7
Important notes at the end of this document.
MKV capacitors for power factor correction
B25836B4247A305
MKV series
MKV400-D-12.5-02 / MKV440-D-15-02
T
A
Dielectric power dissipation P
D
vs. repetition frequency f
0
V
R
= 440 V AC
0.9 V
R
= 396 V AC
FK PC OH RD
August 2006
Please read Cautions and warnings and
Page 3 of 7
Important notes at the end of this document.
Ohmic power dissipation P
R
vs. RMS current value I
R
S
(85 C)
= 3.2 m
I
max
= 55 A
Permissible ambient temperature T
A
vs. total power dissipation P
Natural cooling
Forced cooling 2 m/s
Perm. capacitor temp.
upright mounting position
MKV capacitors for power factor correction
B25836B4247A305
MKV series
MKV400-D-12.5-02 / MKV440-D-15-02
FK PC OH RD
August 2006
Please read Cautions and warnings and
Page 4 of 7
Important notes at the end of this document.
Cautions and warnings
In case of dents of more than 1 mm depth or any other mechanical damage, capacitors must not
be used at all.
This applies also in cases of oil leakages.
To ensure the full functionality of the overpressure disconnector, elastic elements must not be
hindered and a minimum space of 12 mm has to be kept above each capacitor.
Do not handle the capacitor before it is discharged.
Resonance cases must be avoided by appropriate application design in any case.
Handle capacitors carefully, because they may still be charged even after disconnection due to
faulty discharging devices.
Protect the capacitor properly against over current and short circuit.
Failure to follow cautions may result, worst case, in premature failures, bursting and fire.
Discharging
Capacitors must be discharged to a maximum of 10% of rated voltage before they are switched in
again. This prevents an electric impulse discharge in the application, influences the capacitor's
service life and protects against electric shock. The capacitor must be discharged to 75 V or less
within 3 minutes. There must be not any switch, fuse or any other disconnecting device in the circuit
between the power capacitor and the discharging device. MKV PFC-capacitors B-series have a pre-
mounted ceramic discharge module; alternatively discharge reactors are available from EPCOS.
Discharge and short circuit capacitor before handling!
Service life expectancy
Electrical components do not have an unlimited service life expectancy; this applies to self-healing
capacitors too. The maximum service life expectancy may vary depending on the application the
capacitor is used in.
Safety
Electrical or mechanical misapplication of capacitors may be hazardous. Personal injury or property
damage may result from bursting of the capacitor or from expulsion of oil or melted material due to
mechanical disruption of the capacitor.
Ensure good, effective grounding for capacitor enclosures.
Provide means of disconnecting and insulating a faulty component/bank.
The terminals of capacitors, connected bus bars and cables as well as other devices may also be
energized.
Follow good engineering practice.
Thermal load/over-temperature
After installation of the capacitor it is necessary to verify that maximum hot-spot temperature is not
exceeded at extreme service conditions.
MKV capacitors for power factor correction
B25836B4247A305
MKV series
MKV400-D-12.5-02 / MKV440-D-15-02
FK PC OH RD
August 2006
Please read Cautions and warnings and
Page 5 of 7
Important notes at the end of this document.
Overpressure Disconnector
To ensure full functionality of an overpressure disconnector, the following must be observed:
1. The elastic elements must not be hindered, i.e.
- connecting lines must be flexible leads (cables),
- there must be sufficient space (min. 12 mm) for expansion above the connections. This will
enable a longitudinal extension of the can to secure the overpressure disconnector work.
- folding beads must not be retained by clamps.
2. Maximum allowed fault current of 10000 A in accordance with UL 810 standard must be assured by
the application.
3. Stress parameters of the capacitor must be within the IEC60831 specification.
Overcurrent and short circuit protection
Use HRC fuses or MCCBs for short circuit protection. Short circuit protection and connecting
cables should be selected so that 1.5 times the rated capacitor current can be permanently
handled.
HRC fuses do not protect a capacitor against overload
- they are only for short circuit protection.
The HRC fuse rating should be 1.6 to 1.8 times rated capacitor current.
Do not use HRC fuses to switch capacitors (risk of arcing).
Use thermal magnetic over current relays for overload protection.
Resonance cases
Resonance cases must be avoided by appropriate application design in any case. Maximum total
RMS capacitor current (incl. fundamental harmonic current) specified in technical data must not be
exceeded.
Re-switching vs. phase-opposition
In case of voltage interruption, a sufficient discharge time has to be ensured to avoid phase-
opposition and resulting high inrush currents
.
Vibration resistance
The resistance to vibration of capacitors corresponds to IEC 68, part 26.
Max. test conditions:
Test duration
6 h*
Frequency range 1
10 ... 55 Hz*
Displacement amplitude
0.75 mm*
*corresponding to max. 98.1 m/s" or 10 g
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