Medium Voltage Soft Starter

NC3S medium voltage solid state thyristor soft starter is an electronic and intelligent solid state thyristor series medium voltage soft starter with intelligent control. In the soft starting process, the input voltage of the motor terminal is changed by controlling the thyristors connected in series to turn on sequentially, so that the terminal voltage of the motor rises slowly and the soft starting effect is achieved.

 
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  • Specifications
  • Applications
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NC3S series soft starter has superior performance. The components and PC board are processed in special ways such as salt spray resistance and flame retardant. It can protect the components from moisture, dust, vibration and corrosion, and can adapt to high dust, high moisture, and high corrosion and vibration conditions.


Standards
EN/IEC 61800-3
EN/IEC 61800-5-1
EN/IEC 60204-11
EN/IEC 60529
EN/IEC 61800-4
IEEE 519: 1992

 


Certifications:

 

 

 

 

 
 
Main features: 
Voltage class: 6kV, 6.3kV, 6.6kV, 10kV, 11kV (other voltage class can customize)
Current range: 70-1800A
Capacity range: 200~25000kW
DSP digital control
Features: ramp voltage, torque control, current control, transformer start, slow running
Variety of parameters to fit wide power range of different motors
Easy test run and maintenance—use low voltage motor do the whole function test on field
Advanced technology —optical fiber thyrisotr control system
Excellent EMC —power cell use anti-electromagnetic interference insulating material packaging,  copper bus bar connecting, optical fiber insolation
User-friendly HMI—LCD display, multi-language: Chinese, English, Russian
Perfect motor protection
Communication: MODBUS, PROFIBUS; RS-485 interface
Diesel generator—power frequency self-adaption
One drive multi-motor with soft stop
Smart operation interface
Various size and can customize 
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Technical advantages:

Advanced functions—multiple start curves, slow running, generator mode, transformer inrush current limiting, perfect protection
Customized cabinet design—satisfy customer special demand
Abundant application solution—satisfy different industries demand
Special load start—large inertia load start, frequent changing load start, generator power supply start, synchronous motor start
Special equipment start—auto-starting after power failure, one drive multi-motor with soft stop, test bed specialized start
Certificationarc test, Ministry of Communications certification (damp proof, salt-spray proof, anti-vibration), Classification Society Certification (CCS, DNV, ABS, Lloyd Certified, etc.), CE
 

 

 

                             
Industry: Oil & Gas
 
Shanxi CBM compressor
6kV  1120kW/1 set   compressor
1 drive 1 


Yulin natural gas pipeline supercharge and capacity expansion   
10kV  3000kW/12 sets     compressor
1 drive 1
 
 
                          
Zhongnanshan Tunnel-18.02km, the longest highway tunnel in Asia
 
36 sets medium voltage soft starter 6kV/140A,
one drive one
 
 

Load solutions

No.

Load

Application

Industrial

Specifications

1

Blower and fan

furnace blower, induced/exhaust draft fan, dust exhausting fan, sintering fan, circulating fan, main catalytic fan (high power, in general above 10MW), tunnel axial fan

Petrochemical, coal chemical, metallurgy, mine, transportation

high load torque in later period

starting time: 2030 seconds
starting current: 34 times
sintering fan: large inertia, long starting time, around 6090 seconds

 

Tunnel axial fan: two sets  a group, reverse required

2

Pump

Decoking water pump, fuel transportation pump,

decaling pump (hot rolling)
intake pump, water-delivery pump, slush pump

 

Petrochemical, coal chemical, metallurgy, pipeline , mine, electric power

Normal load, soft stop required

Starting time: 1015 seconds

starting current: 2.53.5 times

 

3

Compressor

Oxygen compressor, nitrogen compressor, air separation, air compressor, hydrogen compressor, booster compressor, natural gas pipeline compressor

Petrochemical, coal chemical, metallurgy, pipeline , mine, aviation, marine, electric power

high load torque in late period

starting time: 2030 seconds
starting current: 2 3.5 times

 

some case with high inertia, long starting time, around 4060 seconds

4

Belt conveyor

Coal mine, electric power, iron and steel

Mine, electric power, petrochemical, coal chemical

Changing load: no load, half load, full load

Dual adjustment soft starter

Starting at same time when one drive two motors

5

Ball mill

Ball mill

Petrochemical, mine

High static friction torque, need impulse starting

Starting time: 1530 seconds

Starting current: 34 times

6

Extruding machine

PP extruder

Petrochemical, coal chemical

Constant torque load

Starting time: 1530 seconds
Starting current: 34 times

 

7

Generator

Marine, pipeline, drilling

Pipeline, mine, electric power, marine

Frequency self-adaption, use generator mode: supply voltage and frequency fluctuation

Impulse starting (low initial starting current): gas turbine generator, consider generator single step load increasing capacity

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