DOLD MINISTART BL 9228 Traduction des instructions originales

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Power Electronics

MINISTART

Softstarter With DC-Brake

BL 9228

BL 9228 up to 7,5 kW

BL 9228 up to 15 kW

Block Diagram

Circuit diagram

43 44

X1 X2 P1 P2

A1 A2

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

X1 X2

Elektronik-

Versorgung

Sicher-

heitsüber-

T v

Microcontroller

wachung

M on

t on

I Br

M8463_c

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.

11.01.21 en / 335A