Major role

• Metallurgy - sintering main exhaust fan, converter dust removal fan, blast furnace blower, sulfur dioxide blower, ambient cooling fan, combustion fan, slag flushing pump, phosphorus removal pump, etc
• Electricity - feedwater pumps, condensate pumps, circulating water pumps, supply fans, induced draft fans, primary fans, secondary fans, etc
• Mines - main fans, gas extraction pumps, compressors, belt conveyors, ball mills, crushers, etc
• Oil and natural gas - oil pumps, water injection pumps, compressors, other fans and pumps, etc
• Chemical industry - oil pumps, water injection pumps, compressors, booster pumps, etc
• Building materials - kiln tail high-temperature fan, kiln head exhaust fan, coal mill fan, cement mill circulating fan, powder fan, ball mill, crusher, etc
• Municipal - aeration blower, water supply pump, water supply pump, induced draft fan, forced draft fan, etc
• Other - wind tunnel test fans, shore power supply, mixer, etc

Model Meaning

System topology diagram

Standard IO interface

System bypass scheme

• One to one manual bypass
  It consists of a single pole single throw isolation switch QS1 and a single pole double throw isolation switch OS2-a/0S2-b. The manual bypass cabinet is designed strictly in accordance with the "five prevention" interlocking requirements. The frequency converter output OS2-a and the bypass high-voltage isolation switch 0S2-b are mechanically locked, fully ensuring the safe operation of the variable frequency speed control system.

• One to one isolation automatic bypass
  It consists of three vacuum contactors KM1, KM2, KM3, and two isolation switches QS1 and QS2. The interlock between the frequency converter output vacuum contactor KM2 and the power frequency vacuum contactor KM3 fully ensures the safe operation of the frequency converter speed control system. Knife switches QS1 and QS2 do not have a mechanical locking function, but are manually disconnected during maintenance to form a clear disconnection point, ensuring the safety of workers. They are in a closed state under both power frequency and frequency conversion operating conditions.

• One trailer second-hand motor bypass
  Bypass cabinet 1 consists of a single pole single throw isolation switch QS1 and a single: pole double throw isolation switch QS2-a/QS2-b. The manual bypass cabinet is designed strictly in accordance with the "five prevention" interlocking requirements. The frequency converter output QS2-a and the bypass high-voltage isolation switch QS2-b are mechanically locked, fully ensuring the safe operation of the variable frequency speed control system. Bypass cabinet 2 is the same as bypass cabinet 1.

• One to two isolation automatic bypass
  The main configuration of bypass cabinet 1 includes three vacuum contactors KM1, KM2KM3, and two knife switches QS1 and QS2. The interlock between the frequency converter output vacuum contactor KM2 and the power frequency vacuum contactor KM3 fully ensures the safe operation of the frequency converter speed control system. Knife switches QS1 and QS2 do not have a mechanical locking function, but are manually disconnected during maintenance to create a noticeable effect; The disconnection point ensures the safety of workers and is in a closed state under both power frequency and variable frequency operation conditions. Bypass cabinet 2 is the same as bypass cabinet 1.

Cabinet machine structure diagram

Technical Parameter

• input

1. Voltage level:3kV/3.3kV/6kV/6.6kV/10kV/11kV
2. Voltage fluctuation range:-15%~+10%
3. Voltage frequency:50/60Hz;±5%
4. Power factor: ≥ 0.97 (at full load)
5. System efficiency: ≥ 96% (at full load)
6. Current harmonics:≤4%

• Output

1. Voltage range: 0~rated input voltage
2. Frequency range: 0-120Hz (customizable)
3. Current harmonics:≤4%

• Control power supply

1. Voltage range: three-phase four wire system 380V, ± 10%, 50/60HZ
2. Rated capacity: not less than 10kVA

• Control performance

1. Control mode: V/F control; Non PG vector control (SVC); PG Vector Control (FVC)
2. Speed ratio: 1:50 (VF); 1: 100 (SVC); 1: 200 (VC)
3. Speed control accuracy: ± 1% (VF); ± 0.4% (SVC); ± 0.2% (VC)
4. Torque response time:<200ms (SVC)< 100ms (VC)
5. Starting torque: 0.5Hz150% rated torque (SVC); 0Hz180% rated torque
6. Overload capacity: 120%: 60s
7. Acceleration and deceleration time: 0-3600s (customizable)

• User terminal

1. Switching input: 8 digital inputs (expandable, programmable, compatible with including 1 high-speed pulse input, input range: 0-50kHz)
2. Switching output: 8 digital outputs (expandable, programmable, compatible with including 1 high-speed pulse input, input range: 0-50kHz)
3. Relay output: 8 relay outputs (expandable, programmable)
4. Analog input: 4 channels: AI1, AI2, A13, AI4: -10~+10V/0~20mA
5. Analog output: 5 channels: AO1, AO2, AO3, AO4, AO5: 0~+10V/0~20mA

• Protection function

1. System protection: overcurrent, overvoltage, undervoltage, motor overload, frequency converter overload, phase loss, overheating, temperature controller failure, access control failure, communication failure, etc
2. Unit protection: undervoltage, overvoltage, power supply, overheating, input phase loss, module failure, power supply failure, communication failure, bypass failure, etc

• Other

1. Human machine interface: touch screen
2. Communication method: Supports Modbus protocol (provides standard RS485 interface), optional CANopen, Profibus DP, Profinet, and Ethernet modes
3. Installation method: Cabinet installation
4. Protection level: IP30
5. Noise level: ≤ 75dB
6. Entry and exit methods: bottom in and bottom out, optional for other methods
7. Cooling method: forced air cooling
8. Control power supply: AC 380V ± 10%
9. MTBF：50000h
10. Environmental temperature: -5 ℃~+40 ℃, rated for use above 40 ℃, maximum operating temperature of 50 ℃; 1.5% reduction in capacity for every 1 ℃ increase
11. Environmental humidity: 5%~95%, no condensation
12. Altitude: Below 1000m, if it exceeds 1000m, it needs to be downgraded for use. For every 100m increase, 1% of the downgraded capacity is required
13. Storage environment: It should be stored in an environment free of dust, direct sunlight, flammable or corrosive gases, oil stains, anhydrous vapors, and vibrations
14. Vibration amplitude: below 0.59g

Product specifications

Notes

1. All dimensions and weights are for reference, specific values shall be subject to the technical agreement;
2. The overall size of the machine does not include the height of the cabinet top fan. The height of the cabinet top fan needs to be increased by 300mm to 600mm, as specified in the technical agreement
3. It is recommended that the distance between the front of the equipment and the wall/other equipment should not be less than 1500mm, the distance between the back and the wall/other equipment should not be less than 1000mm, the distance between the side and the wall/other equipment should not be less than 800mm, and the distance between the top and the roof should not be less than 1000mm
4. Size of bypass cabinet W * D * H (mm): 700 * 1450 * 2000