VLT
®
5000 FLUX
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Electrical installation - external fan supply
Torque 0,5-0,6 Nm
Screwsize: M3
Only for IP54 units in the powerrange VLT 5016-5102,
380-500 V and VLT 5008-5027, 200-240 V AC. If
the drive is supplied by the DC bus (loadsharing), the
internal fans are not supplied with AC power. In this
case they must be supplied with an external AC supply.
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Electrical installation - 24 Volt external DC supply
(Only extended versions. Typecode: PS, PB,
PD, PF, DE, DX, EB, EX).
Torque: 0.5 - 0.6 Nm
Screw size: M3
No.
Function
35, 36
24 V external DC supply
External 24 V DC supply can be used as low-voltage
supply to the control card and any option cards
installed. This enables full operation of the LCP (incl.
parameter setting) without connection to mains.
Please note that a warning of low voltage will be
given when 24 V DC has been connected; however,
there will be no tripping. If 24 V external DC supply
is connected or switched on at the same time as
the mains supply, a time of min. 200 msec. must
be set in parameter 120
Start delay.
A pre-fuse of min. 6 Amp, slow-blow, can be
fitted to protect the external 24 V DC supply.
The power consumption is 15-50 W, depending
on the load on the control card.
NB!:
Use 24 V DC supply of type PELV to ensure
correct galvanic isolation (type PELV) on the
control terminals of the frequency converter.
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Electrical installation - relay outputs
Torque: 0.5 - 0.6 Nm
Screw size: M3
No.
Function
1-3
Relay output, 1+3 break, 1+2 make
See parameter 323 of the Operating
Instructions. See also
General
technical data.
4, 5
Relay output, 4+5 make See
parameter 326 of the Operating
Instructions.
See also
General technical data.
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Extra protection (RCD)
ELCB relays, multiple protective earthing or earthing
can be used as extra protection, provided that local
safety regulations are complied with.
In the case of an earth fault, a DC content may
develop in the faulty current.
If ELCB relays are used, local regulations must be
observed. Relays must be suitable for protection
of 3-phase equipment with a bridge rectifier and
for a brief discharge on power-up.
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Earth leakage current
Earth leakage current is primarily caused by the
capacitance between motor phases and the motor
cable screen. When an RFI filter is used, this
contributes additional leakage current, as the filter
circuit is connected to earth through capacitors.
The size of the leakage current to the ground depends
on the following factors, in order of priority:
1. Length of motor cable
2. Motor cable with or without screen
3. Switching frequency
4. RFI filter used or not
5. Motor grounded on site or not
The leakage current is of importance to safety during
handling/operation of the frequency converter if (by
mistake) the frequency converter has not been earthed.
NB!:
Since the leakage current is >3.5 mA, reinforced
earthing must be established, which is required
if EN 50178 is to be complied with. For
3-phased frequency converters, only fault current
relays which are suitable for protection against DC
currents (Din VDE 0664) are to be used. RCD fault
current relays type B comply with these requirements
according to the norm IEC 755-2.
The following requirements must be complied with:
MG.55.A6.02 - VLT is a registered Danfoss trademark
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