BCD.00617 Rev AB,16-Nov-2015

Page 7 of 15

MELCHER

The Power Partners.

Accessories Data Sheet

Backplanes BPD, BPF for T Series

Electromagnetic Compatibility (EMC)

Conducted Emission

The battery charger units can be operated in 3 different

modes, depending on the load:

– Output voltage regulation

– Output power limitation

– Output current limitation

See also data sheet: T series.

In output voltage regulation mode, the conducted noise at the

input

of

the

T units

is

below

level

B

according

to

CISPR 11/22/EN 55011/55022.

In output power and output current limitation mode, e.g. in the

case of charging heavily discharged batteries, the conducted

noise may be above level B, but below level A

Radiated Emission

To keep the radiated noise of the T units as low as possible

they should be mounted into a conductive chromatized 19”

rack, fitted with front panels and the back plane earth con-

nected to the rack.

For integration into non-conductive 19" racks, special front

panels with conductive nuts are available on request.

90

80

70

60

50

40

30

20

10

0

[dB

µV]

MHz

07009

20

30

40

50

60

70

80

90

[dB pW]

[MHz]

50

100

150

200

250

300

30

EN 55014

07010

Fig. 8

Typical disturbance voltage (quasi-peak) at the input of a

back plane fittet with 3 LT units, input filters and 5 additional

output capacitors (10 mF each) according to CISPR11/22

Fig. 9

Typical radiated electromagnetic power (quasi peak) at

system input and output of a back plane fitted with 3 LT units,

input filters and 5 additional output capacitors (10 mF each)