Unobtrusive Isolators close to Ovens but needing very long cable runs, are such runs OK.

[Nickfromwales]

A robot in cyberspace says this:

 

13

 

 

 

A latching contactor relay (or bi-stable relay) maintains its state without continuously powered coils. A momentary pulse "sets" the contacts closed, while a reverse polarity pulse or a separate mechanical/electrical reset pulse "resets" them to the open position. This saves significant energy and prevents buzzing or drop-out during power dips. [1, 2, 3, 4, 5]

 

Why Latching Contactors are Used

Standard relays and contactors are "fail-safe," meaning they require constant power to hold a circuit closed. Latching contactors are highly beneficial in specific applications: [1]

• Energy Efficiency: Ideal for systems that stay on for long durations, as no power is consumed to keep the contacts engaged. [1, 2]

[Mattg4321]

Or get a normally closed contactor. 

[Nickfromwales]

1 hour ago, Mattg4321 said:

Or get a normally closed contactor. 

I have some odd, inbuilt aversion to this needing any kind of constant (continuous / maintained) signal or feed to function, and am favouring something that flip / flops with a single ‘hit’.

 

I may need therapy……but I do also like belts, braces, and for my phone to continue to remain silent each and every night.