Wanlida Medium Voltage Variable Speed Drive
Energy Saving Fields
- Power Generation: Induced draft fan, forced draft fan, condensate pump, feed pump, primary air fan, secondary air fan, booster fan, circulating pump, mill fan, slurry pump etc
- Cement: draft fan, high-temperature fan, air blower, dust collection fan, grinding machine etc.
- Metallurgy: blast furnace blower, slurry pump, feed water pump, dust fan, compressor etc.
- Petroleum&Chemical: Water injection pump, crude oil pump, Compressor, fan, circulation pump, etc
- Urban water supply: Water delivery pump, water intake pump, water supply pump, sewage treatment industry, self-fractionating pump etc
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Minerals & Mining: Mud pump, ventilation fan, belt conveyor, slurry pump etc
Others: Loads such as fan, pump and compressor in pharmaceutical, paper making and wind tunnel test.
Especially for: Fan and Pump
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Power Plant
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Pump, Fans
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Steel Plant
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Fans
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Cement Plant
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Fans
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Product Structure
Wanlida Series Medium Voltage variable speed drive of By-pass cabinet, Transformer cabinet, power unit cabinet and controller cabinet from left to right.
Technical advantages
- No need of extra output filtering device
- Directly driving the general medium voltage synchronous or asynchronous motor and the temperature of the motor will not be increased.
- No need of motor derating operation
- No dv/dt damage to insulation of motor and cable
- No torque ripple induced by harmonics, and the service life of motors and mechanism devices can be extended
- No cable length limited when voltage drop is in the allowable range.
Besides the above advantages, Wanlida medium voltage variable speed drive has the following functions and features:
- Protection of overload, overheat, over-current, open-phase, grounding, over-voltage, negative sequence.
- Current limited function
- Interlock protection of control power supply
- Two sets of control power hot standby for redundancy
- Power cell by-pass function
- Control cabinet automatic bypass function
- Cabinet door opening alarm function
- Lock-phase function
- Synchronizing switch function between variable frequency and power frequency (optional)
- Soft start of motors, no impact to mechanical equipment and network
- Voltage source High-high variable frequency drive, it can realize No-step speed regulation, which makes the typical motors into intelligent motors.
- High quality power input: By phase shifting of the secondary winding and multi-pulse diode rectifier, isolated powers can be acquired and supplied for power cells. (18 pulses for 3/3.3kV, 30/36 pulses for 6/6.6kV, 48/54 pulses for 10/11kV) By using the technique of multi-pulse rectifier, the harmonic current could be eliminated greatly.
- Power cell communicate with controller through optic-fiber, completely electric isolated
- Inner set PID regulator, can realize running in closed-loop
- Multiple communication methods with host computer, isolated RS485 interface, standard MODBUS RTU, communication protocol, PROFIBUS DP (optional), industrial Ethernet communication protocol (optional)
- Accurately fault records, can inquiry information and locate fault
- Compact construction, reasonable layout (can do customer-design)
- Very good protective design to dust, ferrum pulveratum, acid mist, moisture etc.
- Bypass cabinethas a function of "five-protection", meanwhile, it has a pressure relief channel to ensure the safety of operators.
- Modularized design of power units, interchangeable and easy to produce and repair.
Technical parameters
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Series No
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Parameters
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Value
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1
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HVF Capacity(KVA)
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250~8750kVA
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2
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Power of adaptive motor(KW)
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200~7000KW
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3
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Input Frequency(Hz)
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45~65Hz
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4
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Rated input voltage(kV)
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3/3.3kV/4.16kV/6/6.6kV/10/11kV (+15%~ -35%)
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5
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THDi at power grid
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<3% (Permissible value≤4%)
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6
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THDu at output side
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<3% (Permissible value≤5%)
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7
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Input power factor
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>0.95%(>20% of rated load)
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8
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Efficiency
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>97%(under a rated load)
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9
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Output frequency(Hz)
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0.5~120Hz
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10
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Output frequency resolution
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0.01Hz
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11
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Rated output current(A)
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36~600A
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12
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Overload capability
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120%(1min), 150%(3s), 200%(Immediate protection)
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13
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Control mode
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V/F control or Vector control
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14
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Logical control I/O signal
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16 channels respectively
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15
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Analog input
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0~10V/4~20mA
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16
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Analog output
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0~10V/4~20mA Optional (2 channels)
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17
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Boolean input/output
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Communications/Default point (expandable)
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18
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Acc & Dec time (S)
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0.1~3000s
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19
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Communication with host
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CAN, Profibus, Modbus, RS232, RS485 etc
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20
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Cooling mode
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Forced air cooling
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21
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Storage temperature
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00C~450C
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22
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Ambient temperature
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-350C~+450C
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23
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Ambient humidity
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95%, no condensation
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24
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Protection grade
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IP40
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25
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Noise
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<70DB
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Factory Acceptance Test Platform
Wanlida built the first-class high voltage and big capacity medium voltage vaiable speed drive test platform to realize Factory full load test before delivery.