Electromagnetic contactor purchase price is about (LC1-D40.N) 245.00 yuan/ set, the annual power consumption is 559 degrees x0.7695 yuan/ kWh = 430.2 yuan.  Total 675.2 yuan.

The permanent magnet contactor purchase price of 228 yuan /set, the annual power consumption is 3.99 degree x0.7695 yuan / kWh = 3.1 yuan.  Total 231.1 yuan.

permanent magnet contactor service is three times of the electromagnetic contactor, the three-year total savings 675.2x3- (3.1 + 228) = 1794.5 yuan.

For example:  630A / 380V 

Electromagnetic contactor purchase price is about 3,500 yuan / set, the annual power consumption is 2912.7 × 0.7695 yuan / kWh = 2241.3 yuan. Total 5741.3 yuan.

The permanent magnet contactor  purchase price is 5200 yuan / Taiwan, the annual power consumption is 4.99 × 0.7695 yuan / kWh = 3.9 yuan. Total 5203.9 yuan.

permanent magnet contactor is three times of the electromagnetic meter, the three-year total savings 5741.3x3-5203.9 = 12020 yuan.

If all of enterprises in Shanghai use energy-efficient contactors, it would probably be the annual power savings three to four billion degrees, equivalent to nearly a year of 1 million KW power plant generating capacity, that means can be less burn 1.033 million tons of coal, less emission 2.706 million of CO2, 8,780 tons of sulfur dioxide, 7750 tons of nitrogen oxides. Energy saving and emission reduction, to benefit the nation and the people