Medium voltage motor inverter

Wanlida Medium voltage motor inverter will be your best energy saving and speed regulation product for motors.

Wanlida Medium voltage motor inverter

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 etcCement: 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, etcUrban water supply: Water delivery pump, water intake pump, water supply pump, sewage treatment industry, self-fractionating pump etcMinerals & Mining: Mud pump, ventilation fan, belt conveyor, slurry pump etcOthers: Loads such as fan, pump and compressor in pharmaceutical, paper making and wind tunnel test.

Especially for: Fan and Pump

Power Plant	Pump, Fans
Steel Plant	Fans
Cement Plant	Fans

Product Structure

Wanlida Series  Medium voltage motor inverter consists of By-pass cabinet, Transformer cabinet, power unit cabinet and controller cabinet from left to right.

Technical advantages

No need of extra output filtering deviceDirectly driving the general medium voltage synchronous or asynchronous motor and the temperature of the motor will not be increased.No need of motor derating operationNo dv/dt damage to insulation of motor and cableNo torque ripple induced by harmonics, and the service life of motors and mechanism devices can be extendedNo cable length limited when voltage drop is in the allowable range.

Besides the above advantages, Wanlida  Medium voltage motor inverter has the following functions and features:

Protection of overload, overheat, over-current, open-phase, grounding, over-voltage, negative sequence.Current limited functionInterlock protection of control power supplyTwo sets of control power hot standby for redundancyPower cell by-pass functionControl cabinet automatic bypass functionCabinet door opening alarm functionLock-phase functionSynchronizing switch function between variable frequency and power frequency (optional) Soft start of motors, no impact to mechanical equipment and networkVoltage 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 isolatedInner set PID regulator, can realize running in closed-loopMultiple 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 faultCompact 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( Medium voltage motor inverter )

Series No	Parameters	Value
1	HVF Capacity(KVA)	250~8750kVA
2	Power of adaptive motor(KW)	200~7000KW
3	Input Frequency(Hz)	45~65Hz
4	Rated input voltage(kV)	3/3.3kV/4.16kV/6/6.6kV/10/11kV (+15%~ -35%)
5	THDi at power grid	<3% (Permissible value≤4%)
6	THDu at output side	<3% (Permissible value≤5%)
7	Input power factor	>0.95%(>20% of rated load)
8	Efficiency	>97%(under a rated load)
9	Output frequency(Hz)	0.5~120Hz
10	Output frequency resolution	0.01Hz
11	Rated output current(A)	36~600A
12	Overload capability	120%(1min), 150%(3s), 200%(Immediate protection)
13	Control mode	V/F control or Vector control
14	Logical control I/O signal	16 channels respectively
15	Analog input	0~10V/4~20mA
16	Analog output	0~10V/4~20mA Optional (2 channels)
17	Boolean input/output	Communications/Default point (expandable)
18	Acc & Dec time (S)	0.1~3000s
19	Communication with host	CAN, Profibus, Modbus, RS232, RS485 etc
20	Cooling mode	Forced air cooling
21	Storage temperature	00C~450C
22	Ambient temperature	-350C~+450C
23	Ambient humidity	95%, no condensation
24	Protection grade	IP40
25	Noise	<70DB

Factory Acceptance Test Platform

Wanlida built the first-class high voltage and big capacity Medium voltage motor inverter test platform to realize Factory full load test before delivery.

 

Medium voltage motor inverter