Owner manual

40
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Moulded module resistors on heat sink
c
a
d
bg
e
k
Resistor Dimensions
Resistance
Ω
Order number a
mm
b
mm
c
mm
d
mm
e
mm
g
mm
k
mm
370 ERBM370R150W 80 240 70 225 95 5 7.5
240 ERBM240R200W 80 340 70 325 70 5 7.5
Brake resistor Resistor values
Resistance
Ω
Order number Power
kW
Peak brake power
kW
Heat capacitance
kWs
370 ERBM370R150W 0.15 1.4 30
240 ERBM240R200W 0.2 2.2 30
6.2 Mains chokes
Advantages of using a mains choke:
• Less mains disturbance
The wave shape of the mains current approaches sinusoidal; at
the same time the r.m.s. current is reduced by up to 40%
(reduction of the mains load, the cable load and the fuse load).
• Increased life of the inverter
A mains choke reduces the AC load of the DC bus capacitors
and thus doubles its service life.
• The transient high-energy overvoltages which are sometimes
generated at the mains side by circuit breakers or fuses are
stopped by the mains choke and thus the units are usually not
damaged.
• Low-frequent radio interference can be reduced.
Please note:
• When a mains choke is used, the maximum possible output
voltage does not reach the value of the mains voltage.
- typical voltage drop at the rated point: 4 to 5%.
• Mains chokes are always required when the inverter is operated
with increased or maximum power.