Vaidnor VDF650 Series, Руководство пользователя

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Mechanical and Electrical Installation VDF650 User Manual
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38
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Precautions on the Wiring
1
)
Power input terminalsR
,
S or R
,
S
,
T
–
The cable connection on the input side of the AC drive has no phase sequence
requirement
.
–
The specifcation 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 the AC drive is
switched off
.
After indicator CHARGE goes off
,
wait at least 10 minutes before
touching the equipment Otherwise
,
you may get electric shock
.
–
connecting external braking components for the AC drive of 22 kW and above
(
220 V
)
and 37 kW and above
(
other voltage classes
),
do not reverse poles
(+)
and
(-).
Otherwise
,
it may damage the AC drive and even cause a fre
.
–
The cable length of the braking unit shall be no longer than 10 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 fre
.
3
)
Braking resistor connecting terminals
(+),
PB
–
The connecting terminals of the braking resistor are effective only for the AC
confgured with the built
-
in braking unit
.
–
The cable length of the braking resistor shall be less than 5 m
.
Otherwise
,
it may
damage the AC drive
.
4
)
External reactor connecting terminals P
, (+)
For the AC drive of 37 kW and above
(
220 V
)
and 75 kW and above
(
other voltage
classes
),
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 specifcation 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
.
–
The capacitor or surge absorber cannot be connected to the output side of the
AC drive
.
Otherwise
,
it may cause frequent AC drive fault 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
,
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 reliably connected to the main earthing conductor
.
Otherwise
,
it may cause electric shock
,
mal
-
function or even damage to the AC drive.