2 setting the brake chopper mode, Setting the brake chopper mode – Lenze E94ARNE Regenerative power supply User Manual
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9400 regenerative power supply module | Parameter setting
Regenerative power supply module application
Parameterising the brake chopper/brake resistor
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EDS94ARNExxxx EN 2.3 - 06/2014
3.1.1
Setting the voltage threshold for braking operation
The voltage threshold for braking operation is set via
(mains voltage) and
(reduced brake chopper threshold). When the brake chopper threshold is exceeded in the
DC bus, the brake chopper is switched on.
3.1.2
Setting the brake chopper mode
For software versions below V2.0, the following applies:
The regenerative power supply module only feeds back to the mains and activates the
brake chopper if the inverter-side current reaches the maximum device current. If the
current is below the maximum device current and the DC-bus voltage is below the brake
chopper threshold, the brake chopper is not activated.
From software version V2.0 onwards, the following applies:
can be used to set the conditions for brake chopper activation:
Only at overvoltage:
The brake chopper is only activated if the DC-bus voltage has reached the brake
chopper threshold. This setting corresponds to the behaviour of the 9400 controller.
At overvoltage and overcurrent (Lenze setting):
This setting corresponds to the behaviour of regenerative power supply modules with
software versions below V2.0.
At overvoltage and overcurrent and overload:
With this setting, the brake chopper is used for energy consumption if a device
utilisation of 90 % is reached during feedback operation.
– The "normal" voltage thresholds for braking operation still apply.
voltage threshold for braking operation
– To protect the brake chopper against damage, monitoring of the Ixt utilisation is still
active.
Ixt utilisation of brake transistor
Mains voltage selected in C00173
Effective brake chopper threshold
230 V
400/415 V
460/480 V
500 V