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#1
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Mains failure switch-over circuit needed
Hi,
I'm looking for a circuit that will switch over a circuit from trickle charging a 6 volt battery to supplying a load. The load will not be in circuit whilst mains is on but needs to be switched to in the event of mains failure. It needs to be electronic not mechanical (I.E. not relay) Thanks |
#2
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Mains failure switch-over circuit needed
On Mon, 23 Oct 2006 16:57:34 +0100, Warmbells
wrote: Hi, I'm looking for a circuit that will switch over a circuit from trickle charging a 6 volt battery to supplying a load. The load will not be in circuit whilst mains is on but needs to be switched to in the event of mains failure. It needs to be electronic not mechanical (I.E. not relay) --- I'm confused. From your description it sounds like you want a trickle charger to be trickle charging a battery while the mains is on, but then to start supplying a load when the mains goes off, which doesn't seem to make much sense. perhaps what you're looking for is something that connects the battery to the trickle charger when the mains is on, but disconnects it from the charger and connects it (the battery) to a load, instead, when the mains goes off? -- John Fields Professional Circuit Designer |
#3
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Mains failure switch-over circuit needed
John Fields wrote:
On Mon, 23 Oct 2006 16:57:34 +0100, Warmbells wrote: Hi, I'm looking for a circuit that will switch over a circuit from trickle charging a 6 volt battery to supplying a load. The load will not be in circuit whilst mains is on but needs to be switched to in the event of mains failure. It needs to be electronic not mechanical (I.E. not relay) --- I'm confused. From your description it sounds like you want a trickle charger to be trickle charging a battery while the mains is on, but then to start supplying a load when the mains goes off, which doesn't seem to make much sense. perhaps what you're looking for is something that connects the battery to the trickle charger when the mains is on, but disconnects it from the charger and connects it (the battery) to a load, instead, when the mains goes off? Yep that's what I'm after, just couldn't put it in words properly. |
#4
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Mains failure switch-over circuit needed
Would that be a DC UPS - sort of.
regards Ron "Warmbells" wrote in message ... John Fields wrote: On Mon, 23 Oct 2006 16:57:34 +0100, Warmbells wrote: Hi, I'm looking for a circuit that will switch over a circuit from trickle charging a 6 volt battery to supplying a load. The load will not be in circuit whilst mains is on but needs to be switched to in the event of mains failure. It needs to be electronic not mechanical (I.E. not relay) --- I'm confused. From your description it sounds like you want a trickle charger to be trickle charging a battery while the mains is on, but then to start supplying a load when the mains goes off, which doesn't seem to make much sense. perhaps what you're looking for is something that connects the battery to the trickle charger when the mains is on, but disconnects it from the charger and connects it (the battery) to a load, instead, when the mains goes off? Yep that's what I'm after, just couldn't put it in words properly. |
#5
Posted to alt.electronics
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Mains failure switch-over circuit needed
On Tue, 24 Oct 2006 19:23:33 +1000, "Ron"
wrote: Would that be a DC UPS - sort of. regards Ron "Warmbells" wrote in message ... John Fields wrote: On Mon, 23 Oct 2006 16:57:34 +0100, Warmbells wrote: Hi, I'm looking for a circuit that will switch over a circuit from trickle charging a 6 volt battery to supplying a load. The load will not be in circuit whilst mains is on but needs to be switched to in the event of mains failure. It needs to be electronic not mechanical (I.E. not relay) --- I'm confused. From your description it sounds like you want a trickle charger to be trickle charging a battery while the mains is on, but then to start supplying a load when the mains goes off, which doesn't seem to make much sense. perhaps what you're looking for is something that connects the battery to the trickle charger when the mains is on, but disconnects it from the charger and connects it (the battery) to a load, instead, when the mains goes off? Yep that's what I'm after, just couldn't put it in words properly. --- OK. How much current does your load need from the battery and why can't you use a mechanical relay? -- John Fields Professional Circuit Designer |
#6
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Mains failure switch-over circuit needed
On Tue, 24 Oct 2006 06:24:42 -0500, John Fields
wrote: --- OK. How much current does your load need from the battery and why can't you use a mechanical relay? --- And can the low side of the load be switched? -- John Fields Professional Circuit Designer |
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