Electrical Installation; Important Notes; Protection Of Persons; Device Protection - Lenze EMB9351-E Instructions De Mise En Service

7

Electrical installation

7.1

Important notes

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Stop!
The braking unit includes electrostatic sensitive devices.
When working near the terminals, the personnel must be free of
electrostatic charges.
7.1.1

Protection of persons

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Danger!
Before carrying out operations on the braking unit, check whether
all power terminals are in a deenergised state:
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ƒ
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Replacing defective fuses
Replace defective fuses only in the deenergised state with the type specified.
7.1.2

Device protection

Before commissioning, adapt the switching threshold of the braking
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unit(s) to the mains voltage of the controller. (¶ 104)
EDBMB935X DE/EN/FR 12.0
After power−off the power terminals +U
carry dangerous voltages for 3 minutes.
S1, S2 and S3 have a mains potential!
– Wait for at least 3 minutes before changing over the switches.
During braking operation the DC−bus voltage is still applied after
power−off:
– In order to avoid that energy is fed into the DC bus further on,
controller inhibit has to be set for all controllers in the
interconnection.
– Observe that the drive system coasts down after controller
inhibit has been set.
l
Electrical installation
Important notes
Protection of persons
, −U and RB1, RB2 still
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