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GD5000 MV inverter applied to feed water pump in the copper mine in South Africa

GD5000 MV inverter applied to feed water pump in the copper mine in South Africa
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GD5000 MV inverter applied to feed water pump in the copper mine in South Africa - 1

MV inverter applications at overseas applied to feed water pump in the copper mine a: South Africa 1 iff I i1 HHn Project introduction Originally the feed water pump output flow controlled by outlet valve, there is serious throttling loss. There are also other problems, such as the efficiency of the pump is low, cannot change the speed of the motor, the consumption of motor power is constant. The customer use inverter for motor speed regulation to improve the process and reduce consumption. Medium voltage (Grid power) • Speed adjusting effect obviously, quick, safe and reliable. • Reduce the possibility of centrifugal pump cavitation occurred. • Perfect output waveform, distortion is less than 2%. • Torque pulse is low, so it can educe the pipeline vibration and abrasion. • Significant energy saving: - The energy saving ratio is about 15.3%. - Before using inverter, power consumption is 801.61kW; - 801.61kW=3.3kV*165A*1.732*0.85 - After using inverter, power consumption is 678.72kW; - 678.72kW=3.3kV*125A*1.732*0.95 * We get running data for roughly calculate. NO.1 Pump NO.2 Pump

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GD5000 MV inverter applied to feed water pump in the copper mine in South Africa - 2

Summary After using VFD , it can improve the process, reduce the maintenance time, save maintenance costs, increase the reliability of system, improve the service life of equipment, better protect for motor and reduce the impact to grid power. What's more important is significant energy saving ratio, reduce the energy waste. Based on customer feedback, the running effect is well. It is worth to comprehensive popularization and application. Website: www.invt.com invt SHENZHEN INVT ELECTRIC CO., LTD. No.4 Building, Gaofa Scientific Industrial Park, Longjing, Nanshan District, Shenzhen, China...

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GD5000 MV inverter applied to feed water pump in the copper mine in South Africa - 3

MV inverter applications at overseas GD5000 MV inverter applied to the pump in sugar plant in Thailand Project introduction The process of sugar crystallization is very important part in the whole sugar production. Normally the sugar factory use vacuum pan to heat sugar water. After the concentration of sugar water get to limited value, the sugar water go to next step. So if the vacuum pan is running, the sugar factory need use jet condenser to cooling the vacuum pan. Pump parameters Motor Model Rated Voltage Rated Current Rated Speed Power Factor Load Type Below figure is about inverter...

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GD5000 MV inverter applied to feed water pump in the copper mine in South Africa - 4

Features and advantages Be able to soft start; Start time and start method can be adjusted based on the situation on site. More protection for pumps; Such as overcurrent / overvoltage / overheat and so on. Reduce the maintenance and cost; Reduce the loss of shutdown maintenance and save plenty of maintenance costs. Significant energy saving: Below table is after using inverter energy saving ratio: Use the inverter Energy saving ratio: (286.8-112.5)/286.8=60%. Application figures Summary After using medium voltage inverters, there are many advantages, especially signiﬁcant high energy saving...

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GD5000 MV inverter applied to feed water pump in the copper mine in South Africa - 5

MV inverter applications at overseas Below table is some application information in this plant: Motor load

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GD5000 MV inverter applied to feed water pump in the copper mine in South Africa - 6

• Be able to soft start, start time and start method can be adjusted according as the situation on site. • Without harmonic pollution to the motor and efficiently drop the heat of the motor. • Very low torque pulse, so it can reduce the transmission mechanism wearing. • Increase the extraction rate. According to the measurement and calculation, the average extraction rate can be promoted 0.2%. • Significant energy saving, the power consumption for each ton of sugarcane dropped from 33.02kW-h to 28.07 kW-h, the energy saving ratio is about 15%. Summary For the sugar refinery with milling and...

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GD5000 MV inverter applied to feed water pump in the copper mine in South Africa - 7

MV inverter applications at overseas ynchronous switching Synchronous switching technology is used for bumpless switching between inverters and power grids. The technology provides a convenient and reliable solution for starting heavy load, automatically soft-starting multi-pumps in turn, frequently switching systems between inverters and power grids. Site information

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GD5000 MV inverter applied to feed water pump in the copper mine in South Africa - 8

• The inverter supply the motor during the whole process of switching, speed matching fine. • No limit of load characteristic, to all kinds of load, can be achieved low impact current. • Easy realizing scheme. • Support both asynchronous motor and synchronous motor. • Be able to realized one inverter start more motors in sequence, lower equipment cost. Application figures dBHr-ATEJIb CWXf’Ot GOSip!:'. IHJWIC Summary Adopt MVD synchronous switching between power frequency and variable frequency, realizing bumpless switch, realizing soft start of multi-motor in sequence, adjusting speed of...

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GD5000 MV inverter applied to feed water pump in the copper mine in South Africa - 9

MV inverter applications at overseas applied to ID fan in the cement factory in India Project introduction Cement plants are one of the largest consumers of energy; both electrical &thermal. Their electrical energy costs about 20% of the total production cost. The large fans used in the production process consume a major part of electrical energy. Traditionally, Indian cement producers use SPRS to control the speed of the fans. However due to inherent problems with SPRS such as operation in weak networks & increased harmonics, they are now considering the VFD solution. With the use of VFD,...

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GD5000 MV inverter applied to feed water pump in the copper mine in South Africa - 10

Summary Mr. Gajraj Jain, Vice President -Projects, Shree Cement Limited, says: "Medium Voltage Drives as a concept is new to the Indian industries. INVT's Medium Voltage Drives offers much more flexibility in operations, reliable & provides better energy saving. We are very pleased with the performance of INVT's GD5000 Medium Voltage Drives.” Website: www.invt.com irvvt SHENZHEN INVT ELECTRIC CO., LTD. No.4 Building, Gaofa Scientific Industrial Park, Longjing, Nanshan District, Shenzhen, China Y6/01-07 (V1.0)

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GD5000 MV inverter applied to feed water pump in the copper mine in South Africa - 11

MV inverter applications at overseas GD5000 MV inverter applied to exhaust fans in the steel plant in Vietnam Project introduction The exhaust fan of converter is an important device in the process of the steelmaking. There are two MV inverters drive two fans in this project. Either is running, the other one is for spare. Below figure is about inverter system diagram Medium voltage( 6KV) Features and advantages User QF Significant energy saving; Based on the running data, there is about 30% energy saving by roughly calculating. Easily switching running fan to the pare fan. They are easily...

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