Motor Controllers
AC Semiconductor Motor Controller
Types RSE 22 25 - C., RSE 4. 25 - C., RSE 60 25 - C.
•
Soft starting and stopping of 3-phase
squirrel cage motors
•
Rated operational voltage: Up to 600 VACrms, 50/60 Hz
•
Rated operational current: 25 AAC 53 b
•
Potential-free control input
•
LED-indications for power supply, ramping,
bypassing relays, phase sequence and overheating
• Self protection against overheating
• Optional relay output for end of ramp and overheating
alarm
•
Transient overvoltage protection built-in
• Integral bypassing of semiconductors
Product Description
Compact easy-to-use AC
semiconductor motor con-
troller. With this controller 3-
phase motors with nominal
load currents up to 25 A can
be soft-started and/or soft-
stopped. Starting and stop-
ping time as well as initial
torque can be independently
adjusted by built-in potentio-
meters.
Ordering Key
Solid State Relay
Motor controller
E-line housing
Rated operational voltage
Rated operational current
Control voltage
Control relay (option)
Shape of ramp
RSE 40 25 -C 1X
Type Selection
Type
Rated operational
voltage U
e
Rated operational Control voltage
current I
e
U
c
Control relay
RSE:
22: 127/220 VACrms, 50/60 Hz 25: 25 A
E-series,
40: 230/400 VACrms, 50/60 Hz
motor controller
48: 277/480 VACrms, 50/60 Hz
60: 346/600 VACrms, 50/60 Hz
-C: 24 to 110 VAC/DC Blank: No relay mounted
& 110 to 480 VAC 1: 2 control relays mounted
Input Specifications (Control Input)
Control voltage U
c
A1-A2:
A1-A3:
Rated insulation voltage
24 - 110 VAC/DC ±15%,
approx. 12 mA
110 - 480 VAC ±15%,
approx. 5 mA
630 V rms
Overvoltage cat. III
(IEC 60664)
Output Specifications
Utilization catagory
Overload current profile
(overload relay trip class)
AC-53b Integral bypassing
of semiconductors
25 A: 3 : 4: 120
Dielectric strength
Dielectric voltage
2 kVAC (rms)
Rated impulse withstand volt. 4 kV (1.2/50 µs)
Specifications are subject to change without notice (22.02.00)
1
RSE 22 25 - C., RSE 4. 25 - C., RSE 60 25 - C .
Supply Specifications
(IEC 60038)
127/220 VAC rms ±15%
50/60 Hz -5/+5 Hz
40
230/400 VAC rms ±15%
50/60 Hz -5/+5 Hz
48
277/480 VAC rms ±15%
50/60 Hz -5/+5 Hz
60
346/600 VAC rms ±15%
50/60 Hz -5/+5 Hz
Voltage interruption
≤
40 ms
Dielectric voltage
2 kV (rms)
Rated impulse withstand volt. 4 kV (1.2/50 µs)
Rated operational power
5 VA
supplied from
L1-L2
Power supply
Rated operational volt. (U
e
)
through terminals L1-L2-L3
22
Overvoltage cat. III (IEC 60664)
General Specifications
Accuracy
Ramp up
Ramp down
Initial torque
EMC
Immunity
Indication for
Power supply ON
Ramping
Bypassing relay
Wrong phase sequence
Overheated
Environment
Degree of protection
Pollution degree
Operating temperature
Storage temperature
Terminals
Control terminals nominal
Min.
Mounting torque max.
Power terminals nominal
Min.
Mounting torque max.
Approval
CE-marking
10 ±10% on max.
≤
0.5 s on min.
20 ±10% on max.
≤
0.5 s on min.
50% ±5% on max.
< 5% on min.
Electromagnetic Compatibility
acc. to EN 50 082-2
LED, green
LED, yellow (flashing)
LED, yellow (constant ON)
LED, red (flashing)
LED, red (constant ON)
IP 20
3
-20° to +50°C (-4° to +122°F)
-50° to +85°C (-58° to +185°F)
Screw with captive wire
clamp
2.5 mm
2
, AVG 14
0.5 mm
2
, AWG 20
0.6 Nm
10 mm
2
, or 2 x 6 mm
2
AWG 6 or 2 x AWG 10
1 mm
2
, AWG 16
2.0 Nm
UL (listed)
Yes
Mode of Operation
This motor controller is intended
to be used to softstart/ stop 3-
phase squirrel cage induction
motors and thereby reduce the
stress or wear on gear and
belt/chain drives and to give
smooth operation of machines.
Soft starting and or stopping is
achieved by controlling the
motor voltage. During running
operation the semiconductor is
bypassed by an internal electro-
mechanical relay.
The initial torque can be adjust-
ed from 5 to 50% of the nominal
torque.
The soft-start time can be ad-
justed from 0.5 to 10 s and 0.5
to 20 s for the soft-stop respec-
tively.
A green LED indicates supply.
The yellow LED is flashing dur-
ing the ramping up or down.
After the ramping when the
semiconductors are bypassed
the and LED lights constantly.
The red LED is flashing when
the sequency is different from
L1-L2-L3. If the softstarter is
overheated the red LED is turned
on constantly.
Alarm handling:
Over temperature: The RSE will
not start if the heatsink has an
temperature which is exceeding
approx 100°C. When over tem-
perature occurs while the soft-
starter is not ramping (1) or while
the bypass Relays are activated
(2) the following will happen:
1) The softstarter will not ramp
up and alarm relay is deacti-
vated (contact open) - Reset
takes place when the temper-
ature drops below the critical
level and only if the supply is
interrupted and reapplied.
2) The alarm relay will deactivate
(open) to indicate fault and
when the softstarter is not
ramping the softstarter will
react as described in 1).
Sequence: By wrong sequence
at connection of the power the
RSE will start normally but the
alarm relay will not activate.
(Contacts open).
Semiconductor Data
Rated opera-
tional current
25 A
I
2
t for fusing
t = 1 - 10 ms
1250 A
2
s
I
TSM
500 Ap
dI/dt
100 A/µs
Functional Diagram
L1
L2
L3
Uc
110-480 V
24-110 V
0
A3
A2
A1
L1
L2
L3
21 End of ramp
11 Alarm
22 C
U/
T1
U
V/
T2
V
W/
T3
W
2
Specifications are subject to change without notice (22.02.00)
RSE 22 25 - C., RSE 4. 25 - C., RSE 60 25 - C .
Operation Diagram 1
Motor voltage
A1
A2
A3
L1
L2
L3
1
100%
3
2
Initial
Torque
Carlo Gavazzi
Ramp
Up
RSE4025-C
AC semiconductor
motorcontroller
Ramp
Down
Time
1
2
3
Ramp-up time 0.5 to 10 s. Time from zero load voltage to full load
voltage.
Ramp-down time 0.5 to 20 s. Time from full load voltage to zero load
voltage.
Initial torque 5 to 50% voltage at the start of the ramp-up function.
21
11
22
U/T1
V/T2
W/T3
(Terminals 21, 11, 22 only on C1 types)
Operation Diagrams 2 and 3
Mains
Sequence L1-L2-L3
Control input Uc
Overheated
M
3~
LED, green
LED, yellow
LED, red
Alarm reset
End of ramp
Dimensions
102,5
Housing Specifications
Housing material
Colour
Terminal block
Colour
Bottom clips
Colour
Diode cover
Colour
Front knob
Colour
PC/ABS Blend
Light grey
PBTP
Black
POM
Black
PC
Grey Transparent
PC
Black
87,16
75
90,0
86,3
All dimensions in mm
Specifications are subject to change without notice (22.02.00)
3
RSE 22 25 - C., RSE 4. 25 - C., RSE 60 25 - C .
Applications
Changing from Direct ON
Line start to soft start
(Line controlled soft-start)
(Fig.
1)
Changing a Direct On Line start
into a soft start is very simple
with the RSE soft-starting re-
lay:
1) Cut the cable to the motor
and insert the RSE relay.
2) Connect control input to two
of the incoming lines. Set
initial torque to minimum and
ramp up and down to maxi-
mum.
Fig. 1
3) Power up again - adjust the
start torque so the motor
starts turning immediately
after power is applied, and
adjust ramp time to the
appropriate value.
When C1 is operated, the
motor controller will perform
soft-start of the motor. When
C1 is switched off, the motor
will stop, the motor controller
will reset and after 0.5 s a new
soft-start can be performed.
Please note that the controller
does not insulate the motor
from the mains. Contactor C1
is therefore needed as a ser-
vice switch for the motor.
U/T1
U/T2
W/T3
U/T1
U/T2
L1
L2
L3
L1
L2
L3
C1
C1
L1
L2
L3
L1
L2
L3
A1
Fusing Considerations
The motor controller provides
by-passing of the semicon-
ductors during running opera-
tion. Therefore the semicon-
ductors can only be damaged
by short-circuit currents dur-
ing ramp-up and ramp-down
function.
A 3-phase induction motor
with correctly installed and
adjusted overload protection
does not short totally between
lines or directly to earth as
some other types of loads, eg
heater bands. In a failing mo-
tor there will always be some
part of a winding to limit the
fault current. If the motor is
installed in an environment
where the supply to the motor
cannot be damaged, the short
circuit protection can be con-
sidered to be acceptable if the
controller is protected by a 3-
pole thermal-magnetic over-
load relay.
S1
A2
A3
W/T3
M
M
Soft-start and soft-stop
(Fig. 2)
When S1 is closed, soft-start
of the motor will be performed
according to the setting of the
ramp-up potentiometer and
the setting of the initial torque
potentiometer. When S1 is
opened, soft-stop will be per-
formed according to the set-
ting of the ramp-down
potentiometer.
1L1
3L2
5L3
I
>
I
>
I
>
L3
A1
L1
L2
~
A2
A3
U/T1 U/T2 W/T3
M
Fig. 2
Time between Rampings
Ramp time [sec.]
I ramp [A]
1
2
5
7
10
150
125
100
75
50
25
4 min 8 min 20 min N/A
N/A
3 min 6 min 14 min 19 min N/A
2 min 4 min 9 min 12 min 18 min
1 min 2 min 5 min 7 min 10 min
27 sec 53 sec 2 min 3 min 4 min
7 sec 13 sec 33 sec 47 sec 67 sec
To prevent the semiconduc-
tors from overheating, a cer-
tain time between ramping
should be allowed. The time
between rampings depends
on the motor current during
ramping and ramp time (see
table).
Note:
Table is valid for ambient
temperature 25°C. For higher
ambient temperature add
5%/°C to values in the table.
The shaded areas in the table
are for blocked rotor. Do not
repeat rampings with blocked
rotor.
4
Specifications are subject to change without notice (22.02.00)
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