Bucher EMD G 0 Series, Hardware Manual

Page: 26 / 80

Technical data
General data and operating conditions
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300−I−9052003−EN−04/07.2021
DC bus EMDAG2... EMDAG3... EMDAG4... EMDAG5...
Rated voltage − HV on−board supply
system V DC 800 800 800 800
DC−bus capacity C
x
m
F 240 120 120 80
Discharge resistance R
pd
k
W
300 300 300 573
Capacity C
y
nF 4.7 9.4 9.4 4.7
Insulation resistance R
iso
M
W
20 20 20 >50
Max. discharge time
(acc. to EN61800−5−1) s 300 300 300 180
No active discharge available R
ad
L
R
pd
C
x
C
y+
C
y-
R
iso+
R
iso-
HV+
HV-
EMDAG060
Fig. 4−1 Equivalent circuit diagram of DC bus
HV+, HV− DC HV electric circuit
R
iso+
, R
iso−
Resulting resistance per HV potential
Resistance between HV+ or HV+ and electrical ground, including proportional
insulation resistance and all resistances of electronic circuits
R
pd
Resistance for passive discharge
C
x
Capacity of the X−capacitors
C
y+
, C
y−
Resulting capacitance of Y−capacitors, parasitic capacitance, capacitance
between HV+ or HV− and electrical ground
L Load
Electrical ground