3 Phase 400v Bypass Built-in 1.5-75kW Motor Soft Starter With Modbus Communication

Short Description:

NK series bypass motor soft starter is a full digital product built-in bypass contactor. Suitable for squirrel-cage asynchronous motors: Rated voltage: 200V-500V Rated power: 0.75-75KW.
The NK series bypass motor soft starter can control the motor to accelerate smoothly during the starting process and decelerate smoothly in the process of stopping. It also provides a comprehensive protection function for motors and itself. You could control the motor soft starter remotely by modbus communication, it is very convenient.

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Features

Bypass motor soft starter is a sort of new type motor starting protector combining electronic technology microprocessor and automation. It is able to smoothly start and stop motor without step change, which perfectly avoids mechanical and electrical impact as a result of using direct start, Y-△ start and auto-induction voltage-reduced start to start motor and can effectively reduce starting current and distribution capacity. At the same time, as bypass motor soft starter with current transformers and contactors built-in, user does not need to externally connect the both to soft starter.This design saves you a lot of construction costs.

1. Start/stop slope and initial voltage set by 3 different potentiometers built-in
2. Bypass built-in, no need for extra contactor
3. With motor soft start&soft stop
4. The output torque can be maintained during the stop process(Continuous torque control), prevent water hammer effect

5. External△，Y or Internal△ Wiring mode
6. Real-time data of communication(A,B,C phase current, average current) *1
7. Reading history fault records by communication ( 10 history log)*1
8. The statistics data can be read by modbus communication.*1

Specification

Item	Specification
Rated Main Voltage	200-500VAC
Power frequency	50/60Hz
Adaptive Motor	Squirrel-cage three-phase asynchronous motor
Starting times	<5, 5-10 (light load or no-load)
Control Source Voltage	100~240VAC 24VDC
Initial voltage	30%～70%Ue
Start Slope	1～30s
Stop Slope	0～30s
Overload	3xIe 7 Sec, Valid for 50 % on time and 50 % off time
Overload grade	10A
Protection Class	IP42
Cooling Pattern	Natural wind cooling
Place to be used	Indoor location with good ventilation free from corrosive gas and conductive dust.
Environment Condition	Maximum altitude：1000m（3280 ft） Operation Environmental temperature:0 ℃ to + 50 ℃ (32 ºF to 122 ºF)Store temperature:-40 ℃ to + 70 ℃ (-40 ºF to 158 ºF)

Product Details

The main structure of built-in bypass motor soft starter shell is plastic shell, advanced surface powder spraying and plastic spraying technology, with compact dimension and beautiful appearance. Adopt the famous brand of SCRs in China. All the pcb board with strict test before dispatch. The bypass motor soft starter is a very ideal motor starting equipment.

Model

Motor soft stater Model	Rated power			Rated current	Gloss weight
Motor soft stater Model	220V Pe/kW	400V Pe/kW	500V Pe/kW	A	kg

NK401T5-X-3P3	0.37	0.75	1.1	1.5	1
NK402T2-X-3P3	0.55	1.1	1.5	2.2	1
NK4003-X-3P3	0.75	1.5	2.2	3	1
NK404T5-X-3P3	1.1	2.2	3.7	4.5	1
NK407T5-X-3P3	1.5	3.7	5.5	7.5	1
NK4011-X-3P3	2.2	5.5	7.5	11	1
NK4015-X-3P3	3.7	7.5	11	15	1.4
NK4022-X-3P3	5.5	11	15	22	1.4
NK4030-X-3P3	7.5	15	18.5	30	2.4
NK4037-X-3P3	11	18.5	22	37	2.4
NK4045-X-3P3	15	22	30	45	2.4
NK40 60-X-3P3	18.5	30	37	60	2.4
NK4075-X-3P3	22	37	45	75	2.4
NK4090-X-3P3	25	45	55	90	5.2
NK40110-X-3P3	30	55	75	110	5.2
NK40150-X-3P3	37	75	90	150	5.2

1) For ordinary load: The corresponding bypass motor soft starter models can be selected according to the rate current of motors marked on the motor namaplate, such as pumps, compressors, etc.

2) For heavy load: The built-in bypass motor soft starter model of large power size can be selected according to the rated current of motor nameplate, such as centrifuge, crushing machine, mixed, etc.;

3) For frequent start load: According to the rated current of the motor marked by the motor nameplate, we choose a higher power size motor soft starter.

4) Modbus communication function optional, if you need motor soft starter with modbus communication, please inform us when you order.

5) Control power DC24v, AC 220V optional.

6) Start button on the motor soft starter panel or not is optional.

Dimension

Application

Bypass motor soft starter can be widely used as below:

1. Water pump

In a variety of pump applications, there is a risk of power surges. This risk can be greatly reduced by installing a motor soft starter and gradually feeding the current into the motor.

2. Conveyor belt

When using a conveyor belt, a sudden start is likely to cause problems. The belt may pull and become misaligned. Regular starting also adds unnecessary stress to the belt's drive components. By installing a motor soft starter, the belt will start more slowly and the belt is more likely to stay on track properly.

3. Fan and similar systems

In systems with belt drives, the potential problems are similar to those that arise with conveyor belts. A sudden, sharp start means the belt is in danger of slipping off the track. Motor soft starter can solve this problem.

4. Others

Product Dispaly

Customer service

1. ODM/OEM service is offered.

2. Quick order confirmation.

3. Fast delivery time.

4. Convenient payment term.

At present, the company is vigorously expanding overseas markets and global layout. We are committed to becoming one of the top ten export enterprises in China’s electrical automatic product, serving the world with high-quality products and achieving a win-win situation with more customers.