Safety relays, 24V

"Jens Gydesen"

** Huh ?????

What troglodytes have never heard of Google ???

....... Phil

Hi,

Thank you for your kindly words, I suggest that you carry on with the googling, perhaps you have more luck than me, I have tried a couple of hours,

Please notice that the contact shall be min 25A

/JG

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Elesta specialise in force-guided relays.

Unfortunately they probably only go up to the 8-16A region. Is there any way you can split the 25A load?

--
Tony Williams.

No, I cannot split the current, it is one DC motor that shall be stopped

/jg

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With that current you should be looking for a contactor. You did not mention if you are switching AC or DC. If DC you can look for contactors with "magnetic blow out arc chutes". Look for industrial contactors from oem's such as Square D. Try your local electrical supply house.

Use a contactor and strap the contacts together - use the in out method.

24 V coils are available.

"Jens Gydesen"

** Now he is a top poster as well as a troglodyte !

** Was that before or after you came here?

Always say if you have Google and under what search headings.

You would not want to waste good folk's time, now would you ?

** That likely calls for a remote operated circuit breaker.

Shame how you have left out the voltage rating.

........ Phil

"Jens Gydesen"

** What does one have to do to get this top posting cretin to say what the operating voltage of the load is ??

...... Phil

Have him disconnect the power source, grab the motor (+) lead, and the operating voltage will be proportional to how loud he hollers until the motor finally coasts to a stop :)

Paul

stopped

A 24V DC motor with a current rating of 25A requires a special contactor capable of short delay on opening. Such contactors are made by Kilovac (Tyco).

Here is a unit rated for 50A which would be worth looking at.

Hi Ross

Thanks for the objective support

Best regards Jens

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Hi scada

Thanks for your objective support

best regards Jens

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Hi Homer

Thanks for your objective support

best regards Jens "Homer J Simpson" skrev i en meddelelse news:udYIh.64023$Du6.32198@edtnps82...

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If the contacts are A B C

The input wire goes to A, then B then C

The output wire goes to C, then B then A

This distributes the current almost equally across the contacts.

And thank you Jens for your courtesy in responding individually to those who have tried to offer positive assistance. Such is not always the case in these forums and it is not unknown for an OP to never even respond to a thread despite many positive replies. When that happens I just shrug my shoulders......

For inductive and regenerative DC loads, such as a motor, contacts are often wired in series to provide greater arcing distance. In order to stop a DC motor quickly and safely, it may be useful to apply a heavy load, or even a short circuit, to the motor, which will also eliminate possible high voltage arcing. A snubber or capacitor can be used to reduce the voltage kick during the time between the opening of the supply contactor and the closing of the braking contactor.

Paul

OR:

The KBBC-24M is a microprocessor controlled, DC-DC battery powered variable speed motor control designed for 12 and 24vdc Permanent Magnet and Series Wound DC motors. It has a continuous rating of 40 amps and is capable of peak currents of 80 amps for 7 seconds. The KBBC-24M low voltage DC Drive contains many standard features such as current limit, short circuit protection, speed potentiometer fault detector, over-temperature sensing, and under-voltage/over-voltage protection. Eight trimpots are provided to tailor the low voltage DC-DC Drive to exact specifications. Reversing contactors provide arcless forward, stop and reverse operation. A DC power contactor allows a low power switch to turn the control on and off. See data sheet D-905 for complete details.

The KBBC-44M is a microprocessor controlled DC-DC battery powered variable speed motor control designed for 12, 24, 36 and 48vdc Permanent Magnet and Series Wound DC motors. It has a continuous rating of 40 amps and is capable of peak currents of 80 amps for 7 seconds. The KBBC-24M low voltage DC-DC Drive contains many standard features such as current limit, short circuit protection, speed potentiometer fault detector, over-temperature sensing, and under-voltage/over-voltage protection. Eight trimpots are provided to tailor the low voltage DC Drive to exact specifications. Reversing contactors provide arcless forward, stop and reverse operation. A DC power contactor allows a low power switch to turn the control on and off. See data sheet D-905 for complete details.