Lenze E82EV302K4C User Manual

Conditions for a trouble-free network of several drives
Protection in DC-bus operation
12
Network of several drives
12.4
12.4.5
L
12.4-9
EDS82EV903-1.0-11/2002
Cable protection Unit protection in the event
of overload
No device protection in the
event of short circuit
Protection of • on the mains side
• on the DC bus
• on the motor side
If a supply terminal fails
because F1...F3 blow the
remaining controllers in the
network will not be overloaded.
The alarm contact switches off
the mains for the entire
network.
Possible faults One/several controllers with
• internal short circuit (+U
DC
→ -U
DC
)
• internal earth fault (+U
DC
→PE/-U
DC
→PE)
• motor-side earth fault on phase W
Risk Several parallel controllers supply the error location(s) via the DC bus. This may lead to an
overload of the intact controllers, as the faulty controller is not selectively activated on the
DC bus.
Possible damage with central and decentralised supply
• Destruction of the faulty controller
• Destruction of the controllers still intact
• Destruction of the supply unit
Comment The extent of destruction depends on the ratio ”DC-bus power of the whole system / rated
power of the controller concerned”.
Cable protection Unit protection in the event
of overload
Unit protection in the event
of short circuit
Protection of • on the mains side
• on the DC-bus
• on the motor side
If a supply terminal fails
because F1...F3 blow the
remaining controllers in the
network will not be overloaded.
The alarm contact switches off
the mains for the entire
network.
Possible faults One or more controllers with
– internal short circuit (+U
DC
→ -U
DC
)
– internal earth fault (+U
DC
→PE/-U
DC
→PE)
– motor-side earth fault on phase W
Risk Possible damage with central and decentralised supply
• Destruction of the faulty controller
Comment The selective activation of the mains and DC side reduces the extent of destruction.
With mains fuses with
monitoring function (F1 ... F3)
With mains fuses with
monitoring function (F1 ... F3)
and with DC fuses F4 ... F5
Show/Hide Bookmarks

Lenze E82EV302K4C Specifications

General

Brand	Lenze
Model	E82EV302K4C
Category	DC Drives
Language	English