My company main circuit adopts expert explains to the intermediate frequency furnace device "ac - dc - ac transformation system by three-phase fully-controlled bridge rectifier circuit, inductance, wave circuit of inverter circuit in parallel, on the basis of the following:
(a), rated input devices: three-phase alternating current (ac), frequency of 50 hz (60 hz), line voltage is 380 v (high pressure equipment is 660 v, 750 v, 950 v, 1050 v, 1250 v, 1450 v, etc)
(2), equipment rated output: as shown in chart a; Under the rated voltage or rated load, the output power can be smooth, continuous adjustment, the adjustment range is 5% - 100% of the rated power;
(3), can prevent overvoltage switching operation (such as QF open and close, the RS fuse, etc.);
(4) when the output voltage 1.1 1.2 times better than the maximum output voltage or over voltage setting value, the overvoltage protection system action, make the device automatically stop working, and send out alarm signal, over voltage indicator light meter box;
(5) when the inverter bridge through short circuit protection system action immediately, make the automatic stop device, had concurrent flow indicator - flow indicator light meter box;
(6) as the output current more than setting value, the protection system also make the automatic stop device, had concurrent flow indicator - flow indicator light meter box;
(7) the water-cooling system working pressure is lower than a certain value, the function of automatic stop, and light up the water indicator on the panel;
(8) the machine set a limited flow, pressure limiting link, make the input current and output voltage limit within the set value.
Taking care of your HVAC system is really necessary because as you are using your furnace, air conditioning and other appliances it goes dirty with the time. Filters needs change. And for better performance HVAC system must be inspected for any faults. Lennox Furnace Deal
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