| Electronics > Projects, Designs, and Technical Stuff |
| $1.50 Mains circuit breakers |
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| Whales:
I have some ancient type 'L' breakers at hand, but I'm not having any luck researching them up on the web. Is there an extended form of the "L" name? |
| HackedFridgeMagnet:
--- Quote from: Whales on October 31, 2018, 07:48:39 pm ---Very curious about what's inside one. Might add a couple to an order before I get home in a few weeks. No I'm not going to use one in my house, for reasons of 'negative feedback' I need to stick to brands I can keep accountable/are local. --- End quote --- As you probably know they would need Australian accreditation before you would be allowed to get them installed in your switchboard. From memory I was paying about $6 a breaker ex gst. The big players control the market here though. --- Quote from: stevelup on November 01, 2018, 08:10:28 am ---Type B is almost universally used in the UK for residential applications - it's very rare to see type C used. But bear in mind a UK ring final circuit is normally protected with a 32A breaker so even a type B breaker will tolerate the best part of 100A for many seconds! --- End quote --- Thats different to here. I dont think I've ever even seen a B breaker. In Au we use C almost exclusively on domestic and occasionally D for motors etc. |
| capt bullshot:
--- Quote from: Whales on November 01, 2018, 08:24:11 am ---I have some ancient type 'L' breakers at hand, but I'm not having any luck researching them up on the web. Is there an extended form of the "L" name? --- End quote --- Depending on the source, "L" means "Leitungsschutz" or "Licht" (line protection / lighting). According to this source : https://www.elektropraktiker.de/ep-2005-09-659-660.pdf?eID=tx_nawsecuredl&falId=7183&hash=260ca8f934b46a054ae4483d1b9e2262 the thermal trip is at 1.4 ... 1.75 of the rated current (for a 16A breaker), in contrary the "B" thermal trip point is at 1.13 ... 1.45 of rated current. |
| Whales:
Thankyou Bullshot, exactly what I'm after. |
| kony:
Don't cheap out on breakers. I had seen repetetive full rated short current tests done on cheap chineese and branded European ones and the cheap imports were barely able to sustain single test, sometimes even failing to disconnect, sometimes exploding badly - you really don't want have huge ball of plasma being spitted out any time short occurs downstream. Unable to reset is just a joke fault compared to that. Specimens from ABB and Eaton were fine even after five full rated current events. |
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