Output Connections - WEG CFW700 Serie Manual Del Usuario

Installation and Connection

3.2.3.4 Output Connections

ATTENTION!
The inverter has an electronic motor overload protection that shall be adjusted
„
according to the driven motor. When several motors are connected to the
same inverter, install individual overload relays for each motor.
The motor overload protection available for the CFW700 is in accordance
„
with UL508C as per the following information:
- "Trip" current equal to 1.25 times the motor rated current (P0401) adjusted
in the "Oriented Start-up" menu.
- The maximum value of P0398 (Motor Service Factor) is 1.15.
- Parameters P0156, P0157 and P0158 (Overload Current at 100 %,
50 % and 5 % of the rated speed, respectively) are automatically adjusted
when the parameters P0401 (Motor Rated Current) and/or P0406 (Motor
Ventilation) are changed on the "Oriented Start-up" menu. If the parameters
P0156, P0157 and P0158 are set manually, the maximum allowed value
is 1.05 x P0401.
ATTENTION!
If a disconnect switch or a contactor is installed between the inverter and the
motor, never operate them with a spinning motor or with voltage at the inverter
output.
The characteristics of the cable used for the inverter and motor interconnection, as well as
the physical location are extremely important to avoid electromagnetic interference in other
equipment and to not affect the life cycle of motor windings and motor bearings controlled by
inverters.
Keep motor cables away from other cables (signal cables, sensor cables, control cables, etc.),
according to Item 3.2.6 Cable Distances on page
Connect a fourth cable between the motor ground and the inverter ground.
When using shielded cables for connecting the motor:
Follow the recommendations of IEC60034-25.
„
Use low impedance connection to high frequencies to connect the cable shield to ground.
„
Using parts supplied with the drive. See item below.
For inverter frame sizes A, B and C there is an accessory called "Shielding kit for power
„
cables PCSx-01" (see
at the bottom of the cabinet - the
kit for power cables PCSx-01 goes along with inverters with optional internal C3 RFI filter
(CFW700...C3...). The grounding for the motor cable shield on inverter frame sizes D and E
is already provided in the standard inverter cabinet. This is also provided on the "Nema1 Kits
(KN1x-01)" of the inverter frame sizes A, B and C.
For frame sizes B and C with degree of protection IP55, the accessory "PCSC-03 power
„
cable shield kit" is available, and for frame size D and E with degree of IP55 use the standard
accessories for shielding. The PCSC-03 shield kit comes with the inverter as optional item 55.
18 | CFW700
Section 7.2 ACCESSORIES on page
Figure 3.4 on page 19
24.
60), which can be mounted
shows an example. The shielding