Power Electronics

Power Electronics
Power Electronics
Speed controller SX 9240.03
3-phase
0239596
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SX 9240.03/00005; 2.5 A
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SX 9240.03/01005; 5 A
According to IEC/EN 60 947-1, IEC/EN 60 947-4-2
For speed control of 3-phase asynchronous motors up to 5.5 kW
Speed adjustment by potentiometer on the front
Additional galvanic separated control input for external speed
control 0 ... 10 V, 0 ... 20 mA, 4 ... 20 mA
Umin and Umax setting accessable behind screw cover
Large motor voltage range
Integrated temperature monitoring
Fullfills the EMC requirement according to IEC/EN 61 000-6-4
limit class B, therefore screened wires are not necessary
between motor and controller
2 changeover monitoring contacts
LED indicators for alarm and status
Connection for thermistor to monitor temperature
100 mm, 122 mm and 168 mm width
Approvals and marking
Application
• Speed control of fans and pumps.
Speed control only works if the torque of the driven load rises with a
quadratic function relative to the speed. Usually this is given with fans
and pumps. Suitable motors: Asynchronous motors designed for
voltage control (Rotor material Silumin or similar, isolation class F)
SX 9240.03/02005; 11.5 A
Function diagram
Function
U
L1/L2/L3
t
on
off
switch
S1
t
300ms
thermistor
t
nmax
kickstart
speed
t
U
setting
potentiometer
t
U
external 100%
control input
t
relay 1
11-14
11-12
t
fault
relay 2
21-24
21-22
fault
t
M9315
All technical data in this list relate to the state at the moment of edition. We reserve the right
for technical improvements and changes at any time.
Speed controllers are electronic devices designed to enable the speed
control of 3-phase induction motors. The SX 9240 is a phase chopper
device based on a thyristor circuit. The control input "Kickstart", bridge
X7-X8, allows to ramp up the motor voltage to nominal value after start.
After that the voltage is ramped down again to the required value with
corresponding speed. The speed adjustment is made by a potentiometer
on the front or by an external 0 ... 10 V input. The adjustment with the
higher setting will take the control of the voltage/speed.
Temperature sensing
The temperature of the power semiconductors are monitored. If the
permitted highest temperature is exceeded, motor, relay 1 and relay
2 are switched off. The red LED flashes code 1. This Alarm can only
be reset after cooling down the device and temporarily cutting the
auxiliary supply of the unit.
Motor temperature monitoring
A thermistor can be connected to terminals X 9 - X 10. If the permitted
motor temperature is exceeded the motor, relay 1 and relay 2 are
switched off. The red LED flashes code 4. The unit remains in fault
status until the motor cools down and the power supply is switched off
and on again. If no thermistor is connected, X 9 - X 10 must be bridged.
Adjustment of U min and Umax
With the potentiometers Umin and Umax the speed setting can be limited
to a certain minimum and a maximum speed. The potentiometers are
accessible behind a screw cover on the front of the unit.
On 400 V units the minimum voltage can be adjusted between 110 Vrms
bis 160 Vrms and the maximum voltage between 160 Vrms bis 400 Vrms.
Phase monitoring L1, L2, L3
The phases L1, L2 and L3 are monitored internally. If one of the 3
phases fails, motor, relay 1 and relay 2 are switched off. The red LED
flashes code 3. The unit remains in fault status until the failure is
removed and the power supply is switched off and on again. If 2 or 3
phases fail, the unit is no longer supplied. All LEDs go off, the relays
de-energise and the motor is switched off.
1
SX 9240.03 / 20.02.08 e
Function
Block diagram
Phase sequence monitoring
For normal operation a right sequence is necessary. If wrong sequence
is detected, the unit goes into failure mode. The red LED flashes code 6.
The unit remains in fault status until the failure is removed and the
power supply is switched off and on again.
L1
L2
L3
~
electronics supply
ON-OFF switch
The ON-OFF switch is not edge triggered. If the switch is in position
ON, the motor will start after the voltage is connected.
X4
X3
control
X1
+10V
Frequency test
When the unit is connected to voltage, the frequency is measured. If
the frequency is out of the permitted limits 50/60 Hz ± 10 %, relay 1 and
relay 2 are switched off. The red LED flashes code 2. The unit remains
in fault status until the failure is removed and the power supply is
switched off and on again.
Relay function
Relay 1 (11-12-14): Energises when the
energises when the
into failure mode.
Relay 2 (21-22-24): Energises when the
energises when the
into failure mode.
S1
X2
X5(+)
0...10V
X6(0V) 0...20mA
4...20mA
T1
T2
T3
14 12 11 24 22 21
relay 1
relay 2
X10 X9
X8 X7
thermistor
kickstart
M9316_c
unit is switched on and deunit is switched off or goes
unit is switched on and deunit is switched off or goes
Connection diagrams
L1 L2 L3
L1 L2 L3
11
12
12
12
14
14
21
21
21
22
22
22
X9
0...10V
T1
T2
T3
X6
X8
X10
X10
Thermistor
X8
Kickstart
X7
X6(-)
L1
L2
L3
X1
X3
X5
X7
X9
A1
24
L1
L2
L3
X5
X7
X9
X10
Kickstart
11
14
24
Thermistor
L1 L2 L3
11
11
X5(+)
12
14
22
21
X9
X8
24
Kickstart
X6(-)
0...10V
24
S1
0V
DC24V / AC20V
X9
X8
T1
T2
T3
X2
X4
X6
X8
X10
X7
X6(-)
12
X5(+)
11
14
0...10V
22
21
24
X5(+)
12
11
X4
S1
X3
22k
L1
L2
L3
X1
X3
X5
X7
X9
X10
Thermistor
X7
X4
22k
14
22
21
24
X3
X2
X2
X1
X1
A2
A1(+)
T1 T2 T3
T1 T2 T3
M8913
SX 9240.03/0_005
T1
T2
T3
X2
X4
X6
X8
X10
A2
T1 T2 T3
M8914
SX 9240.03/2_ 015
M8915
SX 9240.03/2_ 005
2
SX 9240.03 / 20.02.08 e
Indication
Technical Data
green LED: On, when supply connected
green LED: On, when motor connected to supply voltage
Flashing, when voltage is ramping up
red LED:
flashing code 1: power semiconductors overheated
flashing code 2: wrong mains frequency
flashing code 3: phase failure
flashing code 4: motor overtemperature
flashing code 6: wrong phase sequence
Notes
Protection against short circuit
It is recommended to use superfast semiconductor fuses to protect the
speed controller in the case of short circuits on the output side.
Thermal protection
The speed controllers are designed to operate motors up to the nominal
load. To protect the motor against thermal overload a thermal overload
device, a motor protection device or thermistor motor protection is
required.
To select the right motor the following instructions must be observed:
Between 0.6 and 1.0 of the nominal speed the current could be rise up
to 50 % higher than the nominal current. This effect is caused by the
voltage control. To avoid overheating of the motor it must be declassified.
I.e. a 3.3 kW motor can only loaded up to 2.2 kW. In spite of this measure
a higher temperature cannot be avoided. Because of this the motor
should be of isolation class F or H. In addition the windings should be
monitored by means of a thermal contact or thermistor for overtemperature.
Motor noise
When the motor is running on low speed resonance can cause noise
that may be disturbing.
Technical data
Phase / motor voltage:
L1 - L2 - L3:
Nominal frequency:
Motor power
3 AC 400 V ± 10 %
50 / 60 Hz
Type
SX 9240.03/00005 SX 9240.03/01005 SX 9240.03/02005
heat sink
without
22.5 mm
67.5 mm
Motor power
at 480 V:
1.1 kW
2.2 kW
5.5 kW
at 400 V:
1.1 kW
2.2 kW
5.5 kW
at 200 V:
500 W
1.1 kW
2.2 kW
Nominal voltage
2.5 A
5.0 A
11.5 A
at ϑ u = 40 °C:
Switching
continuous
continuous
continuous
cycle
operation
operation
operation
Min. motor power:
Ramp up time after
Kickstart:
Hold time after Kickstart:
Ramp down time after
Kickstart:
Kickstart voltage:
Power consumption:
Relay contacts
Thermal continuous
current Ith:
Switching capacity
to AC 15
NO contacts:
NC contacts:
Semiconductor fuse:
3 A / 230 V
1 A / 230 V
25 A superfast
External control input:
Input impedance:
0 ... + 10 V, 0 ... 20 mA
20 kΩ
82,5 kΩ
Reference voltage:
Setting potentiometer:
Input impedance:
10 V / 15 mA
22 kΩ
20 kΩ
Ramp time:
approx. 5 sec from min. speed to max.
speed or max. speed to min. speed
Variation of motor voltage
at AC 400 V:
100 V eff ... 400 V eff
General data
Temperature range:
0 ... + 40°C
(If the temperature (20 ... 60°C) exceeds the a. m. range the nominal
current can be increased by 2 % / °C on lower temperature or must be
decreased by 2 % / °C on higher temperature.)
Storage temperature:
- 25 ... + 75°C
Clearance and creepage
distances
overvoltage category /
contamination level
Control voltage to motor
voltage:
4 kV / 2
IEC 60 664-1
Auxiliary voltage to motor
voltage:
4 kV / 2
IEC 60 664-1
EMC
Electrostatic discharge:
8 kV (air)
IEC/EN 61 000-4-2
HF-irradiation:
10 V / m
IEC/EN 61 000-4-3
Fast transients:
2 kV
IEC/EN 61 000-4-4
Surge voltages
between
wire for power supply:
1 kV
IEC/EN 61 000-4-5
Interference suppression:
Limit value class B
EN 55 011
Radiated interference:
Limit value class B
EN 55 011
Degree of protection:
IP 65
IEC/EN 60 529
Vibration resistance:
Amplitude 0,35 mm
frequency 10 ... 55 Hz IEC/EN 60 068-2-6
Climate resistance:
0 / 055 / 04
IEC/EN 60 068-1
Terminal designation:
EN 50 005
Wire connection
Load terminals:
4 mm 2 solid, or
2.5 mm 2 stranded
Control terminals:
1.5 mm 2 stranded
Relay terminals:
2.5 mm 2 stranded
Net weight:
2.5 A:
1280g
5.0 A:
1500 g
11.5 A:
1680 g
Dimensions
Width x height x depth:
2.5 A:
5.0 A:
11.5 A:
100 x 160 x 165 mm
122 x 160 x 165 mm
168 x 160 x 165 mm
0.2 W
7.5 s
1 s
7.5 s
AC 400 V
1.2 W
5A
IEC/EN 60 947-5-1
IEC/EN 60 947-5-1
Thermistor input
NC contact, switching voltage: 24 V
Input inpedance:
50 kΩ
3
SX 9240.03 / 20.02.08 e
Standard types
Set-up procedure
Variants
Ordering example for variants
SX 9240 .03 /_ _ _ _ _
0: without specialfunction
4: Adjustment potentiometers Umin, Umax
5: Thermistor, adjustment potentiometers
Umin, Umax
Safety instructions
- Never clear fault when the device is switched on.
Attention: This device can be started by potential-free contact, while
connected directly to the mains without contactor (see
application example). Please note, that even if the motor is
at rest, it is not physically separated from the mains. Because
of this the motor must be disconnected from the mains via
the corresponding manual motor starter.
- The user must ensure that the device and the necessary components
are mounted and connected according to the locally applicable
regulations and technical standards.
- Adjustments, e.g. adjustment of U min, Umax may only be carried out by
qualified specialist staff and the applicable safety rules must be
observed. Wiring and disconnection work must only be made when
the unit is isolated from the mains.
- After disconnection of the device dangerous voltages may be sensed
for several minutes on the connection terminals caused by filter
capacitors.
0: Internal supply AC 400 V
1: External supply AC 20 V, DC 24 V
2: Internal supply AC 230 V
0:
1:
2:
3:
Application example
L1
L2
L3
Control input 0 ... 10 V
Control input 0 ... 5 V
Control input 0 ... 20 mA
Control input 4 ... 20 mA
0: 2.5 A
1: 5.0 A
2: 11.5 A
Q1
0: with EMC-filter, housing, ON/OFF
switch and setting potentiometer
1: without EMC-filter, housing, ON/OFF
switch and setting potentiometer
2: with EMC-filter, without housing,ON/OFF
switch and setting potentiometer
3: without EMC-filter, without housing,
ON/Off switch and setting potentiometer
X9 X10
SX9240
T1 T2 T3
U
V
M
3~
e-mail: [email protected] • internet: http://www.dold.com
X7 X8
I> I> I>
L1 L2 L3
3-pole
Type
E. DOLD & SÖHNE KG • D-78114 Furtwangen •
Thermistor
SX 9240.03/02005
Article number
0057511
• 3-pole
• for motor currents up to 11.5 A
• with EMC-filter, Housing, ON/OFF switch and setting potentiometer
• with heat sink 67.5 mm
• Control input for 0 ... 10 V
• Thermistor input
• with internal transformer
• 168 mm width
1.) Open enclosure. Connect device and motor according to circuit
diagram.
2.) Remove bridge X8 / X7 when "Kickstart" is not required.
3.) Close enclosure and apply auxiliary voltage.
4.) Start unit with ON/OFF switch.
5.) Turn speed setting potentiometer fully anticlockwise. Adjust U min
potentiometer high enough, so that the motor starts. A humming
motor at standstill should be avoided inorder not to heat up the
motor unneccesarily. Turn speed setting potentiometer fully
clockwise. Adjust Umax potentiometer until the required max. speed
is reached. The motor temperature should be checked on low and
medium speed. If necessary the motor must be cooled.
Kickstart
SX 9240.03/01005
• 3-pole
• for motor currents up to 5 A
• with EMC-filter, Housing, ON/OFF switch and setting potentiometer
• with heat sink 22.5 mm
• Control input for 0 ... 10 V
• Thermistor input
• with internal transformer
• 122 mm width
W
X5 X6
0...10V
0...20mA
4...20mA
14 12 11
Relais 1
24 22 21
Relais 2
M8916_a
PO Box 1251 • Telephone (+49) 77 23 / 654-0 • Telefax (+49) 77 23 / 654-356
4
SX 9240.03 / 20.02.08 e
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