Vaidnor VDF730 Series, Руководство пользователя

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Mechanical and Electrical Installation VDF730 User Manual
-
46
-
requirement
.
The specification and installation method of external power cables
must comply with the local safety regulations and related IEC standards
.
–
Use copper conductors of a proper size as power cables according to the
recommended values in section 8
.
3
.
2
)
DC bus terminals
(+), (-)
–
Terminals
(+)
and
(-)
of DC bus have residual voltage after power
-
off
.
Do not touch
them before ensuring that the CHARGE indicator becomes off and the voltage is
less than 36 V
.
Otherwise
,
you may get electric shock
.
–
When connecting the external braking unit for the AC drive of 37 kW or above
,
do
not reverse poles
(+)
and
(-).
Otherwise
,
it may damage the AC drive and even
cause a fre
.
–
The cable length of the braking unit must not exceed 5 m
.
Use twisted pair wire or
pair wires for parallel connection
.
–
Do not connect the braking resistor directly to the DC bus
.
Otherwise
,
it may
damage the AC drive and even cause a fre
.
3
)
Terminals
(+),
PB for connecting the braking resistor
–
The connecting terminals of the braking resistor are effective only for the AC
drives confgured with a built
-
in braking unit
.
–
The cable length of the braking resistor must be smaller than 5 m
.
Otherwise
,
it
may damage the AC drive
.
4
)
Terminals P
, (+)
for connecting the external reactor
For the AC drives of 75G
/
90P and above
,
remove the jumper bar across terminals P
and
(+)
and install the reactor between the two terminals
.
5
)
AC drive output terminals U
,
V
,
W
–
The capacitor or surge absorber must not be connected to the output side of the
AC drive
.
Otherwise
,
it may cause frequent AC drive faults or even damage the
AC drive
.
–
If the motor cable is too long
,
electrical resonance will be generated due to
the impact of distributed capacitance
.
This will damage the motor insulation or
generate higher leakage current
,
thus causing the AC drive to trip in overcurrent
protection
.
If the motor cable is greater than 100 m long
,
an AC output reactor
must be installed close to the AC drive
.
6
)
Terminal PE
–
This terminal must be grounded reliably
.
The resistance of the grounding cable
must be less than 0
.
1
Ω.
Otherwise
,
it may cause fault or damage to the AC drive
.
–
Do not connect the earthing terminal to the neutral conductor of the power supply
.
–
The impedance of the PE conductor must be able to withstand the large short
-
circuit current that may arise when a fault occurs
.
–
Select the size of the PE conductor according to the following table
.