Power relay connections parallel to the circuit breaker

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Comrades electricians, help with advice. There is an engine (watering pump) connected in this way: a radio relay-power relay-pump. On the power relay goes both phase and zero. In parallel from the relay input, I put a switch (two inputs - two outputs to the pump). Everything works. Separately power, separately off. So, as I am not the only one using the pump, I immediately checked for simultaneous on (based on the user's forgetfulness). On switch-pump turned on, then on radio relay-contact on the power burned out. Those. turning on the pump with a switch, I simultaneously applied power to the relay output. Then, applying current to the relay coil, I applied voltage from the other end. Moreover, the phase-zero ends are not entangled. The question is how can I assemble circuits so that a forgetful user does not burn me a wiring with a well. Can a diode be put in the circuit after exiting from the power relay, and after it is already a wire from the switch? If so, what is the nominal diode needed?

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July 3, 2018 10:59 p.m. Author 0

Reply To quote A complaint

Thank you Ivan.

July 3, 2018 10:21 p.m. 0

QDX1.5-32-0.75A? He has a working current of about 3 A, starting approximately can take 9 A, so that at the limit, but acceptable.
Put a 15-20 ampere fuse after the relay to protect against short-circuit.
Just in case - Reference data on the relay.

July 3, 2018 9:55 p.m. Author 0

The photo looked exactly like it. The paper is already jammed and it seems the reel has been rewound. At least when I took it apart, it seemed to me that it was isolation, soldering.

July 3, 2018 9:42 p.m. Author 0

QDX-32. And you know, maybe you're right.I have two identical pumps. And they periodically breaks oil seals. Water enters the “bowl” of oil and squeezes the oil through the end seals into the pump. Over time, the pressure begins to fall and I understand that it is time to change the pump. But when oil and water get into the pump, it begins to “shorten”. So, I experienced on the old. And now I lowered a new one. On the old one when dialing through the short circuit cable, although it works, on the other it shows the resistance of the windings (I do not remember the numbers). I'll check it tomorrow. In principle, there is one more contact in stock (when disassembling, I turned the contact from open to short).
But then it’s still harder. The relay will burn every time it breaks the seal (if I understood everything correctly, of course).

July 3, 2018 9:19 p.m. 0

The contact burned out not during the action you described, but earlier: the contact cannot burn, closing points with equal potentials.
What kind of pump do you have? "like an aquarius" is not the answer.

July 3, 2018 9:09 p.m. Author 0

Like that. Only the radio relay is powered by 220 from me on a separate line, and two wires go out to the coil from it (according to the seller’s scheme with Ali) and in parallel to K1 there is a switch. Now I will google what a snubber is.

July 3, 2018 9:05 p.m. 0

Quote: pogranec

either RPS or radar -1310.

Or maybe RPL-1310?

July 3, 2018 8:28 p.m. Author 0

Ivan_Pokhmelev,
Submersible pump, such as Aquarius. On the relay a piece of paper is pasted either by the RPS or the radar -1310. Coil and 4 pins. 3 to short circuit, 1 to open. Another pump has a float switch, to break. Before the relay, I also connected the socket and switch.

July 3, 2018 8:06 p.m. +1

Pump connection diagram. On the output from the relay still need to connect

July 3, 2018 7:52 p.m. 0

What kind of pump?

July 3, 2018 19:34 0

And what is written on the relay?

July 3, 2018 18:57 Author 0

Ivan forgive my forgiveness, the relay is not power, but as I understand it, the electromagnetic. The electrician, when he gave it to me, said "power", but I know him even less. Now google Electromagnetic. PCs are only relay contacts, and power is supplied to the relay coil via a radio relay, but this is not important. The main piece of the circuit drawn.

July 3, 2018 18:04 0

Are PCs only power relay contacts or some other circuits?

July 3, 2018 2:23 p.m. Author 0

Scheme, painted as I could.

Power relay connections parallel to the circuit breaker

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