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Why Choose Us
Delivery speed
Large production capacity ensures on-time delivery. Complete packaging ensures product quality and delivers to the destination as soon as possible.
High quality products
Longchi is the forerunner of off-grid solar energy system and home energy storage solutions in china, aiming to improve the energy supply situation especially in rural areas. With strong r&d, reliable quality, and strict supply chain management, longchi products have been testified for peak performance and long life.
Our services
In the pre-sales stage, our team of experts will recommend the most suitable products according to the needs of customers and provide detailed technical consultation. During the sales period, we ensure timely delivery and provide installation guidance. For after-sales, we provide long-term technical support, warranty services and spare parts to help customers maximize the use of products and get reliable maintenance during use.
Energy savings
One of the most significant advantages of frequency converters is their ability to regulate the speed of motors as needed.
This significantly reduces energy consumption compared to traditional on/off control methods – especially when the load varies.
Increased control and precision
Frequency converters allow operators to adjust motor speeds precisely as needed. This results in more precise process control and improved product quality.
Reduction of mechanical stress
By soft-starting motors and then gradually accelerating them to operating speed, variable frequency drives reduce mechanical stress and wear on the equipment, resulting in longer life and fewer breakdowns.
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Item |
Specification |
|
|
Input |
Rated voltage |
T4: Three phase 380V, ±15% |
|
Frequency |
50/60Hz ±5% |
|
|
Output |
Voltage |
T4: Three phase 0~380V |
|
Frequency |
0~3000Hz |
|
|
Overload ability |
150% rated current for30s |
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Radiating |
Cooling type |
Forced cooling |
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Temperature protection |
It trips over heat protection when the radiator temperature is higher than 85 degrees. |
|
|
Fan control |
It operates in drive running. |
|
|
Control Performance |
Control mode |
Open-loop vector control, V/F control |
|
Start torque |
Open-loop vector control:0.5Hz 180%, |
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|
Speed adjustment range |
Open-loop vector control: 1:150 |
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Speed control precision |
Open-loop vector control: ±0.2% |
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|
Function |
Run command channel |
Keyboard control, Terminal control , Communication control |
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Start Mode |
Direct start, Dc brake first and then start, |
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DC Brake |
Start DC brake, Stop DC brake |
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Dynamic brake |
Built-in brake unit |
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Frequency source selection |
Keyboard digital frequency set, analog V1 set, keyboard potentiometer set, PID control set, communication set |
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Master and auxiliary frequency combination setting |
Select the master frequency set or auxiliary frequency set by switching terminals |
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Frequency resolution |
Keyboard Setting : 0.01Hz,Analog setting: 0.1% |
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Carrier frequency |
0.75KHz~15KHz (The upper carrier limit is limited by the drive model) |
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Acceleration and deceleration time |
0.1~3200.0s |
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|
Built-in PID |
Built -in PID controller,it has the sleep wake function, which can achieve the maximum energy saving at the same time |
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|
Common function |
Fault Auto-recovery, PID voltage regulator function, jump frequency, UP/DOWN control, automatic voltage regulator AVR, over-voltage stall protection, over-loss speed protection, etc. |
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|
Input and output signals |
Analog Input |
1. Input Range: DC 0V~10V/4mA~20mA,it is decided by JP1 jumper selection on control board. |
|
Analog output |
The voltage or current output is determined by the JP2 jumper selection on the control board. |
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Digital input |
S1~S6 6 programmable multi-function input |
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Communication Interface |
Communication Protocol |
Based on RS485 hardware, it supports standard MODBUS protocol |
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Display function |
Five digit digital tube display |
The operation status of the drive can be monitored flexibly and conveniently |
|
Protection function |
Various protection functions |
Including overvoltage, over-current, overheat, overload, under-voltage, short circuit, protect the ac drive running reliably all-round. |
|
Installation Environment |
Ambient temperature |
-10~40ºC(ambient temperature is within 40ºC, derating use is required), not allow to contact direct sunlight. |
|
Humidity |
Less than 90% RH, without condensation |
|
|
Application environment |
Non-corrosive, flammable, explosive, dust absorbent material, all kinds of lint does not Accumulate. |
|
|
Vibration |
Less than0.6G |
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|
Elevation |
0~1000m, reduce the rated specification 10% when lift 1000m for each. |
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|
Structure |
Protection level, vibration |
IP20 |
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Selling Units: |
Single item |
|
Single package size: |
18.5X13X16 cm |
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Single gross weight: |
2.200 kg |
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Quantity (pieces) |
1 - 1 |
> 1 |
|
Lead time (days) |
3 |
To be negotiated |
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