SB70G is a new-generation inverter developed independently by the SenLan Science & Technology Holding Corp.,Ltd., featuring low noise, hight performance and multiple functions. It adopts the rotor field-oriented vector control strategy to realize high-accuracy, wide-range speed and torque control of the motor. SB70G is extensively applicable to equipment in various industries, such as drawbenches, mixers, extruders, winding machines, compressors, fans, pumps, grinding machines, belt conveyors, hoists and centrifuges.
Common specifications for SB70G series
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Item |
Description |
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Input |
Rated voltage and frequency |
1 phase: 220v; 3-phase: 220v/380V/690V，50/60Hz |
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Allowable range |
Voltage: 320～420V; voltage imbalance＜3％; frequency:47～63 Hz |
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output |
Output voltage |
3-phase, 0V～input voltage, with the error less than 5%. |
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Output frequency range |
V/F control: 0.00～650.00Hz Vector control: 0.00～200.00Hz |
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Basic specifications |
Motor control mode |
V/F control without PG, V/F control with PG, vector control without PG, vector control with PG, V/F separate control |
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Steady-state speed precision |
Vector control without PG: ≤1％ Vector control with PG: ≤0.02％ |
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Starting torque |
Not less than 150% of rated torque at 0.50Hz |
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Overload capacity |
150％ of rated current for 1 minute |
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Frequency resolution |
Digital reference: 0.01Hz Analog reference: 0.1％ of max. frequency |
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Output frequency precision |
Analog reference: :±0.2％ of max. frequency（25±10℃） Digital reference: 0.01Hz（－10～＋40℃） |
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Command source |
Keypad, terminal and communication. They can be switched over by terminals |
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Frequency reference source |
Keypad, communication, UP/DOWN value, AI1, AI2, PFI and arithmetic unit |
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Auxiliary frequency reference |
Achieves flexible frequency setting |
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Torque boost |
Auto or manual torque boost |
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V/F curve |
User defined V/F, linear V/F and 5 reduced-torque curves |
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Accel/decel |
Linear or S-curve acceleration/deceleartion |
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Jog |
Jog freuqnecy: 0.10～50.00Hz Jog accel/decel time: 0.1～60.0s |
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Auto energy saving |
V/F curve is optimized automatically based on the load condition, achieving auto energy-saving run |
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AVR |
Keeps the output voltage constant automatically when the voltage of power grid fluctuates |
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Auto carrier regulation |
Carrier frequency is regulated automatically based on the load characteristic and ambient temperature |
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Random PWM |
Regulates the tone of the motor noise |
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Droop control |
Applicable to cases where multiple inverters drive the same load |
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Momentary power failure |
Ensures uninterrupted operation by controlling the DC link voltage |
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Dynamic braking |
Built-in braking unit and external braking resistor for models of 15kW or less |
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DC braking |
Braking time: 0.0～60.0s Braking current: 0.0～100.0％ of rated current |
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PFI |
Highest input frequency: 50kHz |
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PFO |
Open-collector pulse(square wave) output of 0～50kHz, programmable |
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Analog input |
2 channels of analog input, voltage or current type, positive or negative |
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Analog output |
2 channels of analog output, 0/4～20mA or 0/2～10V, programmable |
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Digital input |
8 channels of optional multi-function digital input(leakage/source type) |
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Digital output |
2 channels of optional multi-function digital output(leakage/source type); 2 channels of multi-function relay output |
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Communication |
Bulti-in RS485 port, supporting Modbus protocol and USS commands |
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Characteristic functions |
Process PID |
Two sets of PID parameters; multiple correction modes; free PID function |
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Multiple PLC modes |
User can set 8 PLC run modes, with each having up to 48 stages. The mode can be selected by terminals. PLC status can be saved at power failure. |
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Multi-speed select mode |
4 selection modes. Refer to F4-17 |
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User defined menu |
30 user parameters can be defined |
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Parameter display change |
Can display parameters different from the default ones |
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Toreque control |
Torque/speed control can be switched by terminals. Multiple torque setting modes. |
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Zero-servo |
Zero-speed position can be locked |
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High-speed UP/DOWN counter |
Synchronous control, counting in production, stop contol by count and precise position control can be realized |
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High-speed meter counter |
Stop control by length and length indication can be achieved |
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Wobble |
Ensures even winding of textiles |
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Programmable unit |
Comparator, logic unit, trigger, arithmetic unit, filter, multiple-way switch, timer |
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kWh meter timer |
For adjustment of optimal energy saving strategy |
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Protection functions |
Overcurrent, overvoltage, undervoltage, input/output phase loss, output short-circuit, overheating, motor overload, external fault, analog input disconnection, stall prevention, etc. |
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Options |
Braking unit, remote control box, digital I/O expansion board, encoder interface board, analog input expansion board, keypad with copying function or potentiometer, keypad mounting box, keypad extension line,I/O reactor, EMI filter, Profibus-DP module, etc. |
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Ambient |
Service site |
Altitude less than 1000 meters; indoor; no direct sunlight; free of dust,corrosive gases, inflammable gases, oil mist, water vapor, water drops, salt mist, etc. |
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Temperature/humid |
-10～＋40℃/20～90％RH, no condensation |
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Storage temperature |
-20～＋60℃ |
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Vibration |
Less than 5.9m/s2（0.6g） |
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Structure |
Protection degree |
IP20 |
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Cooling method |
Forced air cooling, with fan control |
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