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

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!

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

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?

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

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)

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