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Yueqing Bangzhao Electric Co., Ltd.

AC Starter, Soft Starter, Motor Soft Starter manufacturer / supplier in China, offering 380V 840A Three Phase Motor Soft Starter, Tripe Phase Power Hybrid Inverter 30kw 240V 360VDC Input for Hybrid Motor Load System, MPPT100-500V Single Phase Output Grid Tie Inverter and so on.

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Supplier Homepage Product SOFT STARTER 380V 840A Three Phase Motor Soft Starter

380V 840A Three Phase Motor Soft Starter

FOB Price: US $10-1,000 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $10-1,000/ Piece
Get Latest Price
Port: Ningbo, China
Production Capacity: 9999PCS
Payment Terms: L/C, T/T, Western Union, Paypal, Money Gram

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Basic Info
  • Model NO.: BZ1S840T4
  • Installation: Hanging
  • Two Display: LED and LCD
  • Transport Package: Honeycomb Box
  • Origin: China
  • Protection: Shock Resistance
  • Housing: UPR
  • Trademark: BANGZHAO OR OEM
  • Specification: CE
  • HS Code: 8504403090
Product Description
380V 840A Three Phase Motor Soft Starter
BZ1S series AC motos intelligent soft starter is a new type of advanced starting device which involves electronic technology,microcontroller and advanced control technology.The soft starter can limit the starting current effectively at the start of asynchronous motos,and can be used on fans,water pumps and heavy load machines like conveyers and compress ors.It is the ideal replacement for voltage-limiting starting equipments like star-delta transformer and auto-induction voltage limiter.Meanwhile,the soft starter has various control modes that allow it to be controlled by keyboard,external terminals or host computer,and multiple outputs including fault relay outputs,multi-function relay outputs and analogue outputs,which facilitate its usage in various systems.

Technical specifcation


Control mode

Keyboard/extermal terminal/RS485 communication

Starting mode

Current limiting/voltage/keavy load

Start and stop time

Can be set digitally

Start delay

Can be set digitally

Emergency stop

Stop the output of the soft starter

Limiting current

The starting current should be lower than the limiting current if the soft starter is operating under current limiting or heavy load mode

Starting voltage

The starting voltage can be set digitally if the soft starter is operating under voltage mode

Load control

Possibility to check accidents including belt tripping

Autonmatic restart

Autonmatic restart after breakdown

Fault output

Contact output AC 250V 1A ;DC30V 1A

Multi-function relay output

Start delay, Start,Operation,Stop,Full stop restart

Analogue output

0~20mA / 4~20mA  available

Portection function

Portection of soft starter

Protecting from overload,overcurrent,overheat,unbalanced three phase,missing phase,under loading,extemal fault,etc

Warning of soft starter

Emergency stop,under loading,restart,etc



Operation information

Operation,stop and fault warnings during standby,start delay and starting


Protect the parameters from being modified

Application conditions

Application category


Rated insulation voltage


Rated impulse withstand voltage


Protection degree


Environment conditions

Ambient temperature


Storage temperature


Storage temperature

Maximum90%RH(No condensation)

Ambient humidity

Below 1000m;below 5.9m/s(=0.6g)


Without corrosive gas,flammable gas,oil mist,dust or others


Natural air cooling

380V 840A Three Phase Motor Soft Starter

BZ1S series soft starter
MODELRated power
Rated current
Compatible circuit breaker(QF)Compatible bypass contactor(KM)Cable specification
BZ1S23T41123CM1-63L/32CJ20-256mm2 cable
BZ1S30T41530CM1-63L/40CJ20-4010mm2 cable
BZ1S37T418.537CM1-63L/40CJ20-4016mm2 cable
BZ1S45T42245CM1-63L/63CJ20-6316mm2 cable
BZ1S60T43060CM1-100L/80CJ20-6325mm2 cable
BZ1S75T43775CM1-100L/100CJ20-10035mm2 cable
BZ1S90T44590CM1-225L/125CJ20-10035mm2 cable
BZ1S110T455110CM1-225L/160CJ20-16035mm2 cable
BZ1S145T475145CM1-225L/180CJ20-16035mm2 cable
BZ1S175T490175CM1-225L/200CJ20-25030*3mm2copper row
BZ1S210T4110210CM1-400L/250CJ20-25030*3mm2copper row
BZ1S250T4132250CM1-400L/315CJ20-40030*4mm2copper row
BZ1S300T4160300CM1-400L/350CJ20-40030*4mm2copper row
BZ1S370T4200370CM1-400L/400CJ20-40040*4mm2copper row
BZ1S470T4250470CM1-630L/630CJ20-63040*5mm2copper row
BZ1S570T4315570CM1-800H/700CJ40-80040*5mm2copper row
BZ1S720T4400720CM1-800H/800CJ40-100050*5mm2copper row
BZ1S840T4450840CM1-1250/1000CJ40-100050*5mm2copper row

Description of external terminals





Main circuit


AC power input of the main circuit

Connect with 3-phase power supply through circuit breaker


Output terminal of the soft starter

Connect with 3-phase asynchronous motor


Specific terminal for external bypass contactor

Connect with bypass contactor

Control power supply


Terminal for control power supply input

Connect with AC 220V, 50Hz


Control circuit

Relay output


Control terminal of bypass contactor

Close after starting
Capacity AC 220V 5A



Fault relay output

Active during fault(Multiple modcs available for choosing)
CapacityAC 220V 5A



Multi-function relay output

Programmable activity mode
CapacityAC 220V 5A




External reset tenninal  RET

External emergency stop signal


Control terminal of emergency stop EMS

External reset signal during fault


Extemal-control stop terminal  STOP

Under external control mode,when STOP and COM is closed,and RUN and COM is closed,operation is active.Otherwise stop is active.


External-control operation terminal RUN


COM terminal of external signal  COM

COM terminal of digital input



Positive signal of 485 communication

RS485communication tenminal


Negative signal of 485 communication


GND tenninal

0-20mA or 4-20mAanalogue output,that can be chosen through programming


Output termmal of current signal

380V 840A Three Phase Motor Soft Starter

Q 1. What's the payment term?
A. We accept TT, Western Union,Paypal,MoneyGram.

Q 2.How's the delivery time ?
A. Is due to order quantity, usually it will take about 3-5 days for minimum order quantity.

Q 3.Tell me the standard of package?
A. For the small capacity, it use carton, but for big capacity, we should use honeycomb carton and pallet or  wooden case for protection.

Q 4.Would you accept to use our logo ?
A.It's no problem to do OEM.

Q 5.We want to know month capacity.
A. It depends on which model.For example for relay type small capacity , month capacity can reach near 10000pcs  and big capacity near 1000pcs.

Q 6.Where is your market?
A. Our products are popular in Australia, South America,Philippines,Italy, America, Pakistan and so on.Some of them are our regular customers and some of them are developing. We hope you can join us and make mutural benifit from our cooperation.

Q 7. What kind of certificate you have ?
A. Our company already achieve CCC.

Q8. What is the warranty period ?
A. Normally 15 months.

OEM Services
Please offer us your own high resolution logo in JPG format,there should be two colors at most in the logo and there should be no gradient effect in the logo.
Please offer us your own model numbers.
3. Manual
Please offer us the finished manual file that can be printed directly.

Lead Time
1.Sample orders will be delivered from our factory within 3-5 working days.
2.General orders will be delivered from our factory within 15 working days.
3.Big orders will be delivered from our factory within 30working days at most

1.By EMS,DHL,FedEx,TNT,UPS or other express.
2.By our forwarding agent(by air or by sea).
3.By your own forwarding agent.
4.By domestic forwarding agents to any city in China.
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