ANDELI AJR3-1075 Instrukcja obsługi - Strona 12

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12. Starting mode

12-1Current-limit starting mode, 12-2 Voltage ramp starting mode

It is the current starting mode when PB is set for 0 (0 limited current). The current various wa-

veform of motor at limited current starting mode is shown in the diagram 12-1-1. Thereinto,

I1 is the starting current-limit required, when the motor starts, the output voltage increases

rapidly, till the current of motor reaches the current-limit I1 required, and the current of motor

shall be not more than this value, then the motor speeds up step by step as the rising of output

voltage, when the motor is up to the rated rotary speed, the bypass contactor absorbs, the out-

put current falls down rapidly to rated current of motor Ie or below, up to now, the starting has

been finished.

When the load of motor is too light or the limited current set is too high, it is normal that the

max current at starting is likely not to get the limited current set. Generally, the current-limit

starting is used for the occasion that requires the starting current strictly.

Diagram 12-1-1

12-2 Ramp start of voltage

It is the current starting mode when B is set for 1 (1 limited current). The output voltage

various waveform at voltage ramp starting is shown in the diagram 12-2-1. Thereinto, U1

is the initial voltage at starting, when the motor starts, the current of motor can't be more

than 400% of rated value, the output voltage of soft starter reaches U1 rapidly, then, the

output voltage rises generally according to the staring parameter, the motor speeds up st-

ably as the voltage, when the voltage reaches rated voltage Ue, when the motor gets the

rated rotary speed, the bypass contactor absorbs, thus, the staring has been finished.

The starting time t is the control parameter got according to standard load under the stan-

dard experiment,

series soft starter takes this parameter as the reference, the motor

SJR3-1000

can speed up stably with the help of control output voltage to finish the starting, it doesn't

consider the motor rotation situation not due to mechanical control time. In term of this,

when the load is light, the starting time is often less than the one set, only it can start smo-

othly, it belongs to normal. Generally speaking, the ramp start mode of voltage is applica-

ble for start stability that is required strictly but the start current.

Diagram 12-2-1

0 t T

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12. Starting mode

12-3 Kick start

PB sets for 2 (Kick + limited current) or sets for 3 (Kick + voltage) starting mode, output vari-

able waveform of kick starting mode is shown in diagram 12-3-1 and diagram 12-3-2. In some

occasion with heavy load, if the motor can't be started due to mechanical static friction force,

this starting mode can be chosen. Before starting, please apply high fixed voltage to motor and

let it keep for limited time, in order to rotate the motor through overcoming the static friction

force, then, make it start according to limited current or voltage lamp mode.

Before using this mode, please start this motor with non kick mode, if the motor can't rotate for

too large static friction force, then you can choose this mode; otherwise, please avoid this mode

to start for reducing the unnecessary large current impact.

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Diagram 12-3-1

12-4 Current ramp starting mode

PB sets for 4 that is this starting mode. Diagram 12-4-1 is the output current waveform of cur-

rent ramp starting mode. Thereinto, I1 is the limited value set by P6, T1 is the time set by P1.

The current ramp starting mode has the strong acceleration ability, it is suitable for two-pole

motor, also can shorten the starting time in the certain range.

Diagram 12-4-1

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Diagram 12-3-2

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