Questions tagged [circuit-breaker]
An automatically operated electrical switch designed to protect an electrical circuit.
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Needs help understanding this breaker: Chint NB1-63 C50. Confusing (63 or 50)
I'm trying to understand information on this AC breaker.(See picture)
Is this Rated for 50 amps or 63 amps? Does the "C50" stand for Current? If you think it's 50 amps, how do you know this?...
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Where are the miniature molded case circuit breaker trip characteristics defined?
Some vendors specify a "trip-characteristic" for their miniature circuit breakers with a letter. B, C, K, Z specifically. From what I gather these seem to be standard designations possibly ...
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Can I put ferrite cores around the romex in my electrical boxes and breaker panel? [closed]
I've recently replaced most of the breakers in my house with dual-function arc fault/ground fault protection. (I spent five years in forensics, I'm deeply paranoid, don't judge me.) Naturally I'm ...
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Do I need a resistor in circuit when charging capacitors?
I want to charge a group of capacitors whose total equivalent capacitance is \$ 705 \:\mu F\$ and whose equivalent series resistance is on the order of \$10^{-2} \:\Omega\$. I am trying to charge them ...
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Electronically activated circuit breaker
I want to be able to disconnect the load from a circuit, which may be of variable amperage, possibly up in the hundreds.
I guess what a normal person would do is probably use a contactor of some sort. ...
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Minimum wire size for a 32Amp breaker
Problem statement: Sailing boat with a 16A onboard breaker need to connect to a 32A onshore power supply.
What is the minimum cable size from the onshore 32A breaker to the onboard 16A breaker. Under ...
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What is the purpose of neutral disconnect in a circuit breaker?
I saw some circuit breakers that have a separate neutral disconnect.
For example:
What is that for?
When do you need to disconnect the phases only?
Why not use a circuit breaker that always cuts all (...
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How to detect which breaker has tripped?
I want to test how long it takes for four breakers in series to trip. I want to be able to identify which breaker first tripped.
I came up with this circuit. S1 to S4 are the breakers. Only S1 is ...
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Sizing capacity of a 1-phase breaker to feed a VFD and a 3-phase motor
I have a 3 phase 2HP motor that draws 5.8Amps at 240v
I want to feed it with a VFD with the following specs:
VFD rated power: 4kW
1-phase input: 36 Amps
3-phase output: 18.5 Amps
The VFD is of ...
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How is AFCI Powered?
With arc-fault circuit interrupters once there is overcurrent or arcs what is powering the electronics inside the AFCI that are doing the signal analysis? Won't the electronics get damaged if it's ...
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Rating of circuit breaker for protection
This circuit breaker is rated as 12V-48V 100A and I have to use this circuit breaker between additional alternator (24V 100A) in my vehicle and additional battery bank to provide overcurrent/short ...
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Identify this RCD or RCBO
Here's a close up as requested. Apologies for it being a bit fuzzy.
Is there any reason why this shouldn't be used to protect a dedicated 4mm TPS circuit for a 3kW spa pool?
Thanks for your help.
Can ...
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Calculation of thermal equivalent short-time current
Regarding checking the thermal resistance of switchgear "Ith", To make the comparison, one can compare the permanent short-circuit current "Ik" calculated by the ETAP software and ...
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Can I add a 20A breaker to this electrical panel [closed]
I replaced the oven at my small condo (600 sqft). Oven is 2300 watts/ 9.5 A. It needs a 20A breaker. The panel has a few empty slots.
Question: What's the best way to confirm that the panel can handle ...
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Break logic signal irreversible [closed]
I have a PCB which needs a 3,3V logic signal during the start-up of a system. Then this signal needs to be irreversibly broken.
Of course this could be done by flipping a switch, but the PCB isn't ...
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