DOLD MINISTART BL 9228 Translation Of The Original Instructions

Power Electronics
MINISTART
Softstarter With DC-Brake
BL 9228
BL 9228 up to 7,5 kW
BL 9228 up to 15 kW
Block Diagram
L1 L2 L3
I
U
14
T1 T2 T3
Circuit diagram
P1 P2 P3 14 24
43 44 13
43 33 13 X1 X2 P1 P2
44 34 14 24 A1 A2 P3
A1 A2 X1 33 34
X2
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.
P1 P2 P3 A1 A2 X1 X2
Elektronik-
Versorgung
Sicher-
heitsüber- T v
Microcontroller
wachung
M on t on I Br
13 24 43 44 33 34
M8463_c
L2
L3
L1
L2 L3
L1
T2 T3
T1
T1 T3
T2
M8464_d
Translation
of the original instructions
• According to IEC/EN 60947-4-2
• 2-phase motor control
• For motors up to 15 kW bei 3 AC 400 V
• Separate settings for start and brake time, as well as starting
and braking torque
• No braking contactor necessary
• With automatic standstill detection
• Maintenance- and wearfree
• Auxiliary voltages AC 230 V, AC 400 V and DC 24 V
• Monitors undervoltage and phase sequence
• 3 relay outputs for indicaiton of status and fault with LED-indication
• With input to detect motor temperature
• Function test of braking circuit when actuating the On-button
• Monitored braking current
- safe monitored start
- protection against unententional start-up
- safe disconnection of motor contactor after finished braking
• BL 9228 up to 7.5 kW: 90 mm width
BL 9228 up to 15 kW: 112.5 mm width
Approvals and Marking
Applications
• Motor with gear, belt or chain drive
• Fans, pumps, conveyor systems, compressors
• Woodworking machines, centrifuges
• Packing machines, door-drives
Function
Softstarters are electronic devices designed to enable 1-phase or
3-phase induction motors to start smoothly. The devices slowly ramps up
the current on two phases, therefore allowing the motor torque to build up
slowly. This reduces the mechanical stress on the machine and prevents
damage to conveyed material.
These features allow cost saving constructions of mechanical gear. The
braking circuit is tested für correct function at start-up. A negative test
interrupts the starting and indicates a fault signal.
Start/Stop switch
When the motor is on full speed after the starting with start switch the
semiconductors are bridged with internal relay contacts to prevent internal
power losses and heat built up.
When stopping the motor via start switch braking is started. The braking
current flows until detection of the stillstand through the motor windings. If
the brake function takes longer than 10 sec, the monitoring relay 1 provides
a signal. After 15 sec the brake function will be finished and the motor will
be separated from the mains via contactor K1.
Monitoring relay 1 (contact 13-14)
Relay 1 is energized if the brake function takes longer than 10 sec. By
restarting of the device this relay is de-energized. However, if the brake
function has been longer than 10 sec for the third time, the device is set
into an error mode. The red LED flashes code 9. This fault can only be reset
by switching on and off the power supply.
Monitoring relay 2 (contact 13-24)
This relay energises as soon as the unit is ready for operation after connecting
it to power. If any error occurs the monitoring relay 2 will be de-energized
immediately. The power output will be switched off.
Monitoring relay 3 (contact 33-34)
The relay is energized after activating the on-button and is de-energized
after indication of the motor standstill at the end of braking.
If standstill is not detected, the relay is de-energized after pushing the off-
button and elapse of a safety time. The relay is operating the motor contactor.
It is immediately de-energized by any fault indication.
1
11.01.21 en / 335A