Respected sir..many thanks for your valuable time and detailed explaination that I was missing...@amad1
I am attempting to get a clear understanding of what you are trying to do.
Please review these items (1.-6.) and indicate (i.e. write in an AAC post) ANY changes or corrections you believe necessary.
1. There is a source of 240VAC/50Hz having the capability to deliver large current and power.
2. Connected to the source is a "convenience outlet" (e.g. a wall socket), the current through which is limited by a circuit breaker. This circuit breaker is known to open its contacts due to either (a) current that exceeds the breaker rating or (b) a fault within the breaker itself. I suggest that an additional fault condition--indistinguishable from an open breaker--can exist due to defective or failed wiring anywhere in the path through which the 240VAC drives current. Wires do break; wires do get damaged; screws holding wires to sockets, switches, etc do become loose--all allowing loss of contact.
3. Various appliances may be connected via the convenience outlet. During normal operation these appliances may consume a range of power (and current) from quite small (0W) to rather large (1500W).
4. Connected appliances can fail. After failing they may continue to draw current ranging from 0.0A (e.g. the appliance power switch fails: a common failure mode) to the maximum current allowed by the circuit breaker. Appliances may contain temperature sensors that turn off the appliance at certain temperatures; this may appear as a temporary failure.
5. There is a resistor in series with a neon bulb, that for brevity I will refer to as the "neon circuit." The neon circuit is connected in parallel with the circuit breaker. When driven by a 240VAC source the neon circuit will pass a current in the range of 2-10mA (depending on resistor value and specific neon bulb used).
6. It is expected that the neon circuit will light whenever the circuit breaker is "open" and some load is connected at the convenience outlet. Such load includes any appliance that is switched "on" and was (a) working normally prior to the opening of the breaker or (b) had failed before or after the breaker opened. Such load also includes any appliance that has within it an automatic switch (e.g. temperature limit) to reduces the load current to 0A.
An observation: In many countries the connection of the neon circuit would be prohibited by regulations because it allows (a small) current (but potentially large voltage) to flow to the load even when the breaker is open. That is, a person should be entitled to assume that no dangerous voltage is available at the convenience outlet if the breaker is open. I do not know whether such regulation is in force at your location, wherever that may be.
Your goal is to set up circuitry such that a distinct visual indication (i.e. a combination or pattern of lights) is shown whenever a LOAD IS CONNECTED (and switched "on" if that feature is available) at the convenience outlet AND one of the following conditions exists. The lights must uniquely identify which condition exists (i.e. by viewing the lights you can tell which condition exists).
I believe that the following conditions could exist:
a. The load is operating normally. The circuit breaker is closed.
b. The load was operating normally but the circuit breaker has opened due to an internal fault within the breaker, or within the wiring from the 240VAC source to the load, or within the wiring from the load returning to the 240VAC source.
c. The load has failed (as defined at 4. above) but the circuit breaker remains closed.
d. The load has failed (as defined at 4. above) and the circuit breaker, in response to the failure, has opened.
Please review the possible fault causes discussed in paragraph 4. above. Indicate which of these causes you wish to consider for your design.
Please review the operating conditions listed above (a.-d.). Indicate which of these conditions your design must identify.
Thank you for clarifying your goal.
A) Yes all the things you highlighted are my goal...That include points 1-6 as well as points a-d...However my main focus is on short circuit fault..means when short circuit or temporary overlaod or breaker failure occur ,breaker trips..then user donot have any clue whether there is still short circuit exisiting or there ws temporary overcurrent.If he has no idea abou it..there are likely two conditions.
a) If there was temporary overlaod or breaker abnrmality(temporary) and he dont switch On breaker,then unwanted discontinuiy of supply.
b) If there is short circuit existing and user turns breaker On ,then there wil again tripping and breaker may burst or life deteriorates.I want to distinguish whether there is load connected or short circuit,,,beacuse here for the case Neonn is always On after breaker tripping.For normal operation,circuit breaker bypasses neon circuit, so neon is off.
B) Secondly your concern about connecting neon in parallel with branch circuit breaker is of vital importance and agreeable ..however I have tested different loads by plugging in socket outlet and tripping breaker ..they include :
1) electric iron
2) pedestal fan(inductive load)
3) Charger(cap load can say if i am not wrong)
If breaker trips there are some millivolts across outlet for electric iron(resistive load) and inductive load ..however ther are 10-20 volts for laptop charger connected in outlet..
Lastly I want to work with least effort and components(requirement)
Thanks for your response