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Safety relays, 24V

J

Jens Gydesen

Jan 1, 1970
0
Hi,

I am looking for safety relays for 24V activation, min 25A switch current

You can easily find 24V relays for automotive, but they are obviously not
approved for emergency stop function in an industrial application.

Anyone here who knows 24V safety relays,

Thanks,

best regards Jens
 
P

Phil Allison

Jan 1, 1970
0
J

Jens Gydesen

Jan 1, 1970
0
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
 
T

Tony Williams

Jan 1, 1970
0
Jens Gydesen said:
I am looking for safety relays for 24V activation, min 25A switch
current
You can easily find 24V relays for automotive, but they are
obviously not approved for emergency stop function in an
industrial application.
Anyone here who knows 24V safety relays,

Elesta specialise in force-guided relays.
<http://www.elestarelays.com>

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

Jens Gydesen

Jan 1, 1970
0
No, I cannot split the current, it is one DC motor that shall be stopped

/jg
 
S

scada

Jan 1, 1970
0
Jens Gydesen said:
Hi,

I am looking for safety relays for 24V activation, min 25A switch current

You can easily find 24V relays for automotive, but they are obviously not
approved for emergency stop function in an industrial application.

Anyone here who knows 24V safety relays,

Thanks,

best regards Jens

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Den har indtil videre sparet mig for at få 6014 spam-mails
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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.
 
H

Homer J Simpson

Jan 1, 1970
0
I am looking for safety relays for 24V activation, min 25A switch current

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

24 V coils are available.
 
P

Phil Allison

Jan 1, 1970
0
"Jens Gydesen"


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

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,


** 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 ?


Please notice that the contact shall be min 25A


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

Shame how you have left out the voltage rating.



......... Phil
 
P

Phil Allison

Jan 1, 1970
0
"Jens Gydesen"
No, I cannot split the current, it is one DC motor that shall be stopped


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





....... Phil
 
P

Paul E. Schoen

Jan 1, 1970
0
Phil Allison said:
"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
 
J

Jens Gydesen

Jan 1, 1970
0
Hi Ross

Thanks for the objective support

Best regards Jens
 
J

Jens Gydesen

Jan 1, 1970
0
Hi scada

Thanks for your objective support

best regards Jens
 
J

Jens Gydesen

Jan 1, 1970
0
Hi Homer

Thanks for your objective support

best regards Jens
 
H

Homer J Simpson

Jan 1, 1970
0
Jens Gydesen said:
Hi Homer

Thanks for your objective support

best regards Jens

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.
 
R

Ross Herbert

Jan 1, 1970
0
Hi Ross

Thanks for the objective support

Best regards Jens

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......
 
P

Paul E. Schoen

Jan 1, 1970
0
Homer J Simpson said:
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.

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
 
H

Homer J Simpson

Jan 1, 1970
0
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.

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.


http://www.kbelectronics.com
 
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