FST-820 Elevator VFD 3.7-37KW Closed-Loop Vector Control
The FST-820 is a high-performance closed-loop vector VFD specifically designed for elevator applications (3.7-37KW, 380V). Supporting both permanent magnet synchronous motors and asynchronous motors with multiple encoder interfaces, it delivers 200% torque at 0Hz for superior low-speed performance. The flexible S-curve definition with 4-level acceleration/deceleration ensures smooth ride comfort, while 48V battery rescue enables automatic leveling during power outages. With 40 built-in protection functions including overspeed detection, forced deceleration, and early door opening safety, it meets EN81 and GB7588 standards. The built-in DC reactor and braking unit reduce external component costs, and the RJ45-connected operation panel simplifies debugging. Ideal for high-speed passenger elevators, heavy-load freight elevators, and precision hospital lifts where performance and safety are paramount
Power range
3.7kw~37KG
Input voltage
220V 1 phase to 220V 3 phase
220V 1 phase to 380V 3 phase
380V 3 phase to 380V 3 phase
Product Overview
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Villa Elevators
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Passenger Elevators
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Freight Elevators
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Industrial Elevators
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Subway Escalators
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Supermarket elevator
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Lifting motor
Features
- Suitable for driving control of permanent magnet synchronous motors and asynchronous motors, with multiple rotary encoder interfaces;
- Support speed setting for multiple segments and analog quantities;
- Flexible start curve processing, multi segment S curve setting, and 4-level acceleration and deceleration time setting can ensure good elevator operation comfort;
- With simple and practical battery operation function, 48V power input can complete power outage self rescue;
- Equipped with various elevators such as enabling detection, holding brake contactor control, output contactor control, forced deceleration judgment, overspeed protection, speed deviation detection, early door opening, contact adhesion detection, motor overheating detection, startup pre torque compensation, etc;
- Dedicated functions make elevator control simple and easy to operate;
- The built-in DC reactor and braking unit improve the output power factor of the system and reduce the cost of external components in the electrical system;
- The full series of independent air duct design, professional lightning protection design, professional processing and production platform, and advanced process control ensure the quality of elevator dedicated frequency converters;
- The unique single key design of the operation panel makes complex keyboard operations easy and effortless; And it can be connected to any location through the RJ45 port, making elevator debugging more convenient and simple; The parameter copying unit is simple to use and convenient for batch debugging.
Technical Specifications
| Items | Specifications | ||
| General Specifications | Carrier frequency | 0.5k〜16k(Hz)；The carrier frequency is automatically adjusted according to the load characteristics. | |
| Input frequency resolution | Digital setting: 0.01Hz | ||
| Analog setting: Maximum frequency *0.1% | |||
| Output frequency accuracy | Digit setting: Maximum frequency x±0.01% | ||
| Analog setting: Maximum frequency *±0.01% | |||
| Control mode | Open loop vector control (SVC)/Closed loop vector control (VC) /VF control | ||
| Starting torque | 0.5HZ/180% (SVC)； 0Hz/200% (VC) | ||
| Speed range | 1： 100 (SVC) | 1： 1000 (VC) | |
| Speed stability accuracy | ±0.5% (SVC) | ±0.05% (VC) | |
| Overload capacity | 150% rated current 60 seconds; 180% rated current for 1 second. | ||
| Acceleration and deceleration curve | Linear or S-curve acceleration and deceleration mode; Four groups of acceleration and deceleration time and four groups of S-curve setting; Multiple combinations | ||
| Overhaul control | Can be specified by any multi-segment speed | ||
| Multi-speed operation | Achieve up to 8 speed runs | ||
| Automatic Voltage Regulation (AVR) | When the grid voltage changes, it can automatically keep the output voltage constant | ||
| Display and operation | LED display | The parameter of setting frequency, output frequency, output voltage and output current can be displayed | |
| LCD Displays the operation panel | Select accessories, Chinese or English prompt operation content | ||
| Parameter copy | The LCD operating panel allows for fast replication of parameters | ||
| Protection function | 40 kinds of protection such as power-on short circuit detection, input-output phase loss protection, overcurrent protection, overvoltage protection, undervoltage protection | ||
| Key lock and function selection | Lock part or all of the keys and define the scope of some keys to prevent misoperation | ||
| Own Features | Power on the safety self-test of peripheral devices | It can realize the safety detection of peripheral devices such as grounding and short circuit | |
| Power failure emergency operation | The emergency operation scheme is simple and convenient | ||
| Overspeed protection | Built-in elevator overspeed protection function; Multiple action options | ||
| Judging velocity deviation | Built-in speed deviation detection function; Timely detection of potential elevator hazards | ||
| Strong urgent function | It has the function of forced speed change detection; Effectively prevent the elevator from hitting the top and squatting the bottom | ||
| Motor temperature detection | Determine the motor temperature in time to eliminate safety hazards | ||
| Starting compensation | Two starting torque compensation methods; Analog or digital quantities | ||
| QUICK key | The user can freely define the shortcut menu | ||
| Timing control | Convenient timing control function | ||
| Input-output characteristic | Run command channel | Three channels: operation panel given, control terminal given, communication given | |
| Frequency source | There are five frequency sources: digital set, analog voltage set, analog current set, communication set, multi-speed set | ||
| Input terminal | 10 digital input terminals, lifting 1 can be used as high-speed pulse input, can be compatible with active PNP or NPN input mode | ||
| Three analog input terminals, one of which can only be used as voltage input, and the other one can be used as voltage or current input | |||
| Output terminal | Three digital output terminals | ||
| 2 relay output terminals | |||
| 2 analog output terminals, respectively optional 0/4~20mA or 0/2~10V, can achieve the set frequency, output frequency and other non-power output | |||
| Environment | altitude | Area 1000 m | |
| Ambient temperature | -10 ° C ~40 ° C (ambient temperature is 40 ° C ~50 ° C, please use the reduced rate) | ||
| humidness | Less than 95%RH, no boiling condensation | ||
| Vibration | Less than 5.9 m/s ² (0.6g) | ||
| Storage temperature | -20℃~60℃ | ||
Model Selection Guide
| Model no. | Power | output current | Input voltage | Size（mm） | Installation size（mm） | G.W |
| FST-820-3R7S2 | 3.7KW | 8.2A | 380V | 160*250*185 | 145*235 | 1.08KG |
| FST-820-5R5GT4 | 5.5KW | 13A | 380V | 160*250*185 | 145*235 | 3.4KG |
| FST-820-7R5GT4 | 7.5KW | 18A | 380V | 205*320*195 | 190*308 | 5.6KG |
| FST-820-011GT4 | 11KW | 27A | 380V | 205*320*195 | 190*308 | 5.95KG |
| FST-820-015GT4 | 15KW | 33A | 380V | 205*320*195 | 190*308 | 6.55KG |
| FST-820-018GT4 | 18KW | 38A | 380V | 220*390*200 | 160*375 | 8.45KG |
| FST-820-022GT4 | 22KW | 45A | 380V | 220*390*200 | 160*375 | 8.8KG |
| FST-820-030GT4 | 30KW | 60A | 380V | 220*390*200 | 160*375 | 9KG |
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