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0.75kw Ac Motor Soft Starter


Product Details:
Brand Name: SAFESAVE
Model Number: SSR401T5-A-3P3
Rated power: 0.75kW
Type: Three phase
Inbuilt bypass: Yes
Rated voltage: 400V
Packing Dimension: 19*10.5*11cm
G.W: 1kg
Application: Pump/Fan/Compressor
Warranty: 18 months

Product Details

Technical Parameter


Product Overview:

The SSR series motor soft starter adopting RS485 communication interface, support Modbus protocol. It is suited for the industry bus monitoring and control, and widely used on textile, metallurgy, petroleum, chemical industry, water treatment, shipping, transportation, medicine, food processing, mining and mechanical equipments.

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Internal Analytic Diagramsoft starter.jpg

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Internal Control Diagram:







Application Diagram



Product Protections:

◆ 8xIn over current protection

◆ 5-8. 5xin Continued Overcurrent Protection

◆ Over load Protection with classes 10A, 10, 20 and 30

◆ Three phase current imbalance Protection.

◆ No voltage protection

◆ Phase Missing Protection

◆ Phase Sequence Protection

◆ SCR Overheating Protection

Typical wiring of softstarter:

◆ Y Wiring Mode


When using the external mode of SSR, the SSR power module is connected between the power source and the motor.

Caution: The motors with three terminals can only use the external wiring mode. The rated current of the soft starter in the external mode is selected according to the rated current of the motor.

◆ Internal △ Wiring


When using the SSR internal wiring mode, the SSR power module is connected to the motor winding in series. The current of the power module is phase current, which is 1/1. 732 of line current.

Caution: The internal wiring mode can only be applied to motors with six terminals. The rated current of the internal wiring soft starter is selected according to the 1/1. 732 of the rated current of the motor.



Company Information

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Technical specification of SSR series softstarter
Frequency 50/60Hz±5Hz
Rated main voltage 220-500±10%VAC(chose by customer);
Control source voltage 100-240VAC-15%+10% or 24VDC(chose by customer);
The motor adapted Three-phase squirrel-cage induction motor
Times of start per hour <5 at 400% FLA
Motor rated operational currentMotor full load current: 1.5-75A
Initial voltage 30%-70%Un
Start slope1-30 seconds
Stop slope1-30 seconds
Over current During start,operation,stop,output current over limit
Unbalanced currentOutput current unbalanced level beyond the setting
1²t over load May set to 10A,10...overload protection base on the setting
to delay protection stop 
Missing phase/No voltage Stop the softstarter when 1 or 2 phases failed or no voltage input 
Thyristor(SCR) overtempStop the softstarter when the radiator temperature rises above 80℃
Phase sequenceForbid starting when the input phase sequence is wrong
(If the function is unnecessary, please tell us before ordering)

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