Danfoss VLT AQUA Drive FC 202 Design Manual

10.6 Motor
Any 3-phase asynchronous standard motor can be used
with a drive.
Terminal Function
96 U/T1
97 V/T2
98 W/T3
99 Ground
Table 10.17 Motor Cable Terminals Providing Clockwise
Rotation (Factory Default)
The direction of rotation can be changed by switching 2
phases in the motor cable, or by changing the setting of
parameter 4-10 Motor Speed Direction.
Motor rotation check can be performed using
parameter 1-28 Motor Rotation Check and following the
conguration shown in Figure 10.9.
175HA036.11
U
1
V
1
W
1
96 97 98
FC
Motor
U
2
V
2
W
2
U
1
V
1
W
1
96 97 98
FC
Motor
U
2
V
2
W
2
Figure 10.9 Changing Motor Rotation
10.6.1 Motor Thermal Protection
The electronic thermal relay in the drive has received UL
approval for single motor overload protection, when
parameter 1-90 Motor Thermal Protection is set for ETR Trip
and parameter 1-24 Motor Current is set to the rated motor
current (see the motor nameplate).
For motor thermal protection, it is also possible to use the
VLT
®
PTC Thermistor Card MCB 112 option. This card
provides ATEX certication to protect motors in explosion
hazardous areas Zone 1/21 and Zone 2/22. When
parameter 1-90 Motor Thermal Protection, set to [20] ATEX
ETR, is combined with the use of MCB 112, it is possible to
control an Ex-e motor in explosion hazardous areas.
Consult the programming guide for details on how to set
up the drive for safe operation of Ex-e motors.
10.6.2 Parallel Connection of Motors
The drive can control several parallel-connected motors.
For dierent congurations of parallel-connected motors,
see Figure 10.10.
When using parallel motor connection, observe the
following points:
•
Run applications with parallel motors in U/F
mode (volts per hertz).
•
VVC
+
mode can be used in some applications.
•
Total current consumption of motors must not
exceed the rated output current I
INV
for the drive.
•
Problems can occur at start and at low RPM if
motor sizes are widely
dierent because the
relatively high ohmic resistance in the stator of a
small motor demands a higher voltage at start
and at low RPM.
•
The electronic thermal relay (ETR) of the drive
cannot be used as motor overload protection.
Provide further motor overload protection by
including thermistors in each motor winding or
individual thermal relays.
•
When motors are connected in parallel,
parameter 1-02 Flux Motor Feedback Source cannot
be used, and parameter 1-01 Motor Control
Principle must be set to [0] U/f.
Electrical Installation Con... Design Guide
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Danfoss VLT AQUA Drive FC 202 Specifications

General

Brand	Danfoss
Model	VLT AQUA Drive FC 202
Category	DC Drives
Language	English