Watchdog reset?

[xt600]

5 minutes ago, james.wilson said:

it will melt the varnish of the windings, but id assume the reg will fail first, taking the br with it, then the tx

ideally that will cause an mcb trip, but if your on rewireable fuses who knows. Been many appliancies caused issues  

 

It should take out the 3A fuse before the MCB, hopefully :-) 

 

 

[PeterJames]

14 minutes ago, xt600 said:

 

I see what you are saying but will a transformer 'wear out'?  I can understand how it may get hotter than it should if it's under too much load but it will carry on working as it should until it eventually burns out, and stops working. Won't it? 

Of course a transformer will wear out, they wear out in normal use let alone when they are being overloaded. Transformers are a moving part in your panel that's the bit that hums, they are vibrating the more they hum the more they are vibrating which is wear. But it also puts a strain on the components the bridge rectifier and diodes that go into making the charging circuit  

[xt600]

Thanks for all your advice guys, I'll stick in a smaller battery and see how it goes.  System has been running for nearly 12 years now,  9 of which it has had the larger battery. Only really started having these issues at the last battery change.

[xt600]

3 minutes ago, PeterJames said:

Of course a transformer will wear out, they wear out in normal use let alone when they are being overloaded. Transformers are a moving part in your panel that's the bit that hums, they are vibrating the more they hum the more they are vibrating which is wear. But it also puts a strain on the components the bridge rectifier and diodes that go into making the charging circuit  

 

That's an interesting concept. I've always understood 'wear' to be caused by the friction of different parts moving against each other. I would've thought a transformer's core, windings and varnish coating would move as one while vibrating. 

 

[PeterJames]

Its hard to test the battery without a proper battery discharge tester. The best way to work out the battery size needed is to see what current the system draws and x that by 10 that will give you the minimum battery size required to last for 12 hrs, if you want need it to last longer add another PSU and battery rather than expecting the smaller panel PSU to cope.

[PeterJames]

ie 200mA x 10 = 2Ah 

[xt600]

22 minutes ago, PeterJames said:

Its hard to test the battery without a proper battery discharge tester. The best way to work out the battery size needed is to see what current the system draws and x that by 10 that will give you the minimum battery size required to last for 12 hrs, if you want need it to last longer add another PSU and battery rather than expecting the smaller panel PSU to cope.

 

Are you talking about the current drawn while the system is set normally, or the current drawn when all bells an whistles are ringing? 

[xt600]

*Power Supply Rating It should be noted that the eurösec CPX has 1 Amp available for the full system. However, for the purpose of compliance to EN and PD6662 standard, the capacities of the power supply have to be specified differently. For a Grade 2 system you have 72 hours to charge the battery. With the CPX Control Panel, 90mA is available for battery charging. This defines a theoretical maximum standby battery capacity of 8.0Ah and a maximum of 666mA available for system power. If a smaller capacity battery is used then the rating has to be reduced accordingly. For example: If a 7Ah battery is used it will recharge in 72 Hrs and will theoretically provide 910mA (1000-90mA) for the system. However, the supply rating for that system under PD6662 is still 7.0Ah/12hrs = 583mA. Sounders, detectors and other auxiliary items should be included when calculating current drawn by the system.

[PeterJames]

35 minutes ago, xt600 said:

 

Are you talking about the current drawn while the system is set normally, or the current drawn when all bells an whistles are ringing? 

You wouldnt really need the bells and whistles to ring for 12 hrs now would you 

[PeterJames]

32 minutes ago, xt600 said:

*Power Supply Rating It should be noted that the eurösec CPX has 1 Amp available for the full system. However, for the purpose of compliance to EN and PD6662 standard, the capacities of the power supply have to be specified differently. For a Grade 2 system you have 72 hours to charge the battery. With the CPX Control Panel, 90mA is available for battery charging. This defines a theoretical maximum standby battery capacity of 8.0Ah and a maximum of 666mA available for system power. If a smaller capacity battery is used then the rating has to be reduced accordingly. For example: If a 7Ah battery is used it will recharge in 72 Hrs and will theoretically provide 910mA (1000-90mA) for the system. However, the supply rating for that system under PD6662 is still 7.0Ah/12hrs = 583mA. Sounders, detectors and other auxiliary items should be included when calculating current drawn by the system.

 

 Risco will also tell you that a battery in a wireless detector will last up to 3 years I have never known them last more than 18 months.  I would never put a 7Ah battery in a panel with a 1amp PSU yep it will charge it, yep the battery will last far longer than a smaller one in a power cut, but those figures do not state the current needed to charge a flat 7Ah battery