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#1
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fridge powerd by an inverter?
Hi, I have sold a guy a 600w modified sine inverter, was tested before it
was sent away, he received it but he couldnt get it to work (he wants it for his fridge), so he brought it back to me. I tested it and it didnt work so I gave him a new one, I tested it infront of him with a 500w jigsaw, worked fine. I got a call from him two hours later, he said he tested it on his drill it workd fine then he put it on his 300w fridge but it didnt work so he tried the drill again and that didnt work either. So now he has blown up two inverters. The inverter has a overload cut off so I dont see how the fridge could blow up the inverters, anyone have any idea? Thanks Darren |
#2
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fridge powerd by an inverter?
"Darren" wrote in message ... Hi, I have sold a guy a 600w modified sine inverter, was tested before it was sent away, he received it but he couldnt get it to work (he wants it for his fridge), so he brought it back to me. I tested it and it didnt work so I gave him a new one, I tested it infront of him with a 500w jigsaw, worked fine. I got a call from him two hours later, he said he tested it on his drill it workd fine then he put it on his 300w fridge but it didnt work so he tried the drill again and that didnt work either. So now he has blown up two inverters. The inverter has a overload cut off so I dont see how the fridge could blow up the inverters, anyone have any idea? Thanks Darren Start up current for a compressor is generally 5-6 times the running current! |
#3
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fridge powerd by an inverter?
A fault on the fridge maybe?
"Darren" wrote in message ... Hi, I have sold a guy a 600w modified sine inverter, was tested before it was sent away, he received it but he couldnt get it to work (he wants it for his fridge), so he brought it back to me. I tested it and it didnt work so I gave him a new one, I tested it infront of him with a 500w jigsaw, worked fine. I got a call from him two hours later, he said he tested it on his drill it workd fine then he put it on his 300w fridge but it didnt work so he tried the drill again and that didnt work either. So now he has blown up two inverters. The inverter has a overload cut off so I dont see how the fridge could blow up the inverters, anyone have any idea? Thanks Darren |
#4
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fridge powerd by an inverter?
"scada" wrote in message
. net... "Darren" wrote in message ... Hi, I have sold a guy a 600w modified sine inverter, was tested before it was sent away, he received it but he couldnt get it to work (he wants it for his fridge), so he brought it back to me. I tested it and it didnt work so I gave him a new one, I tested it infront of him with a 500w jigsaw, worked fine. I got a call from him two hours later, he said he tested it on his drill it workd fine then he put it on his 300w fridge but it didnt work so he tried the drill again and that didnt work either. So now he has blown up two inverters. The inverter has a overload cut off so I dont see how the fridge could blow up the inverters, anyone have any idea? Thanks Darren Start up current for a compressor is generally 5-6 times the running current! ....for a period less than that of the overload cutoff to respond, while the active devices are being destroyed? |
#5
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fridge powerd by an inverter?
On Sun, 02 May 2004 13:01:25 +0000, scada wrote:
"Darren" wrote in message ... Hi, I have sold a guy a 600w modified sine inverter, was tested before it was sent away, he received it but he couldnt get it to work (he wants it for his fridge), so he brought it back to me. I tested it and it didnt work so I gave him a new one, I tested it infront of him with a 500w jigsaw, worked fine. I got a call from him two hours later, he said he tested it on his drill it workd fine then he put it on his 300w fridge but it didnt work so he tried the drill again and that didnt work either. So now he has blown up two inverters. The inverter has a overload cut off so I dont see how the fridge could blow up the inverters, anyone have any idea? Thanks Darren Start up current for a compressor is generally 5-6 times the running current! That is normal for a 3-phase motor. A single phase motor can be a lot higher under some circumstances. Larger compressors often have relief valves that take the load off during startup, but I wouldn't expect that on a 300W fridge! A fault on the fridge is possible. Mind you, it is also possible that the fridge compressor actually takes a lot more than 6xFLC to get going for some reason. I'd be tempted to test the fridge with a suitable sample/hold ammeter to measure the starting current before going any further. The inverter really needs to be specified with a suitable characteristic for motor starting. -- Cheers... Mick Gave up on viruses & trojans - moved to Linux... :-) Nascom & Gemini info at http://www.nascom.info |
#6
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fridge powerd by an inverter?
"Darren" wrote in message
... Hi, I have sold a guy a 600w modified sine inverter, was tested before it was sent away, he received it but he couldnt get it to work (he wants it for his fridge), so he brought it back to me. I tested it and it didnt work so I gave him a new one, I tested it infront of him with a 500w jigsaw, worked fine. I got a call from him two hours later, he said he tested it on his drill it workd fine then he put it on his 300w fridge but it didnt work so he tried the drill again and that didnt work either. So now he has blown up two inverters. The inverter has a overload cut off so I dont see how the fridge could blow up the inverters, anyone have any idea? There is a company that sells inverters specificaly to run fridges in boats, the model they sell has a 600 watt continuous output, and something like a 2.5 to 3 killowatt surge capacity, that's something that's not common on a standard 600 watt inverter. i fridge's compressor will pull a hell of a lot of current on start up, easily more than a 'normal' inverter can supply, unless it's a 2000 watt consinuouse unit with a surge that easily covers the surge at compressor startup. i'd tell him to stop blowing inverters, and get the details of what his fridge really pulls (it's like people who buy a 700 watt inverter to run their 700 watt microwave, that's just the cooking power, the actual power drawn will be anything upto double the cooking power (i have a 550 watt microwave in my motorhome, so you'd think a 600 watt inverter would cover it with ease, but it's input power is 900 watts, with a larger surge on initial start up on full power.. i can actually get this microwave to work on my 330 watt cheapo inverter, but only on the lowest setting and for a minute at the most before the inverter trips out) |
#7
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fridge powerd by an inverter?
CampinGazz wrote:
"Darren" wrote in message ... Hi, I have sold a guy a 600w modified sine inverter, was tested before it was sent away, he received it but he couldnt get it to work (he wants it for his fridge), so he brought it back to me. I tested it and it didnt work so I gave him a new one, I tested it infront of him with a 500w jigsaw, worked fine. I got a call from him two hours later, he said he tested it on his drill it workd fine then he put it on his 300w fridge but it didnt work so he tried the drill again and that didnt work either. So now he has blown up two inverters. The inverter has a overload cut off so I dont see how the fridge could blow up the inverters, anyone have any idea? There is a company that sells inverters specificaly to run fridges in boats, the model they sell has a 600 watt continuous output, and something like a 2.5 to 3 killowatt surge capacity, that's something that's not common on a standard 600 watt inverter. It might be cheaper, and at least more power-efficient to get a fridge which runs on the availabel voltage, eg 12V. Leif |
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