Product introduction
Product Profile
VTF880 energy feedback is suitable for three-phase AC power supply equipment with AC voltage below 660V and 50Hz. It adopts the most advanced military grade high-performance 32-bit DSP digital processing controller with floating point operation, which can quickly detect system voltage, current, power, reactive power and other parameters, and achieve coordinate rotation changes. The control and operation of digital PI regulators and other functions drive the power device (IGBT) of PWM converters, allowing the output energy of the product to flow to the power grid, achieving energy conservation.
Product Features
● Suppress harmonic currents and improve power quality in the power grid ;
● Two-way flow of current and energy, four-quadrant operation , improve energy efficiency;
● The DC bus voltage remains stable , especially suitable for situations where the power supply voltage is consistently low;
● Low voltage single machine capacity of 500kW , no need for parallel use , reducing faults .
Applications
Widely used in elevators, oilfield pumping units, centrifugal equipment, electric dynamo meters, lifting, etc.
Product specifications
Note: The size shall be subject to the specification drawing of the corresponding model. If there is any update, please place the final order or consult the manufacturer's sales engineer.
Electrical parameters
| Input Voltage | |
| Power Voltage | 3AC220V、3AC380V、3AC660V（-15%+10%）或用户定制 3AC220V, 3AC380V, 3AC660V (-15%+10%) or customized |
| Grid frequency | 50±3Hz |
| DC Voltage | 220V＜400V; 380V:<720V; 660V:<1150V |
| Voltage harmonics | <5% |
| Performance characteristics | |
| Rated capacity | 220V：30kW/45kW/75kW/110kW 380V：45kW/75kW/110kW/160kW/200kW/250kW/315kW/400kW/500kW/600kW 660V:45kW/75kW/110kW/160kW/200kW/250kW/320kW/400kW/500kW/600kW |
| DC voltage control | Feedback function： Operating voltage: > 1.5 times the grid voltage + 50V 220V:<400V 380V:<720V 660V:<1150V PWM：PWM rectification and SVG features: Stable voltage:> 1.5 times the grid voltage+50V 220V:<400V 380V:<720V 660V:<1150V |
| Voltage control accuracy | ≤0.5% |
| Power factor | >0.95 |
| Output harmonic content | <5% |
| Overload capacity record | 1.45 times for 60 seconds; 1.5 times protection |
| Operating efficiency | ≥97% |
| Full response time | ≤10ms |
| Control mode | |
| Control Chip | 150MHz high-speed DSP digital signal processor Programmable gate array FPGA |
| Control method | PWM current tracking controltechnology; DC side voltage balance control technology; Coordinate transformation vector control technology; Instantaneous current detection technology |
| Control function | Feedback control PWM rectification control Static var compensation control (SVG) |
| Operation mode | Resistive load;capacitive load; inductive load |
| Communication method | CAN、RS485 |
| Monitor interface | display： Grid voltage, AC current, DC voltage, real-time power, feedback energy, fault information and warning status, etc Settings： Control parameters such as feedback input voltage, feedback cutoff voltage, DC constant voltage, feedback voltage, working mode, etc |
| Protection method | Overcurrent, DC overvoltage, AC overvoltage, AC undervoltage, IGBT direct connection, equipment overheating, reactor overheating, phase-locked fault, and external settings |
| Protection response time | Less than 300us,the overcurrent,overvoltage and IGBT through protection are less than 10us |
| Fault output | Relay output, 2 normally open passive contacts, contact capacity AC250V/5A |
| Cooling method | Controllable air cooling |
| Control power | 220VAC |
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VTF880 series digital energy feedback
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