Heinz,
Just a simple thought.
Some RV applications use an adjustable delay timer wired in series with the
coil of the relay (delay on make). This 'little black box' has an adjustable
delay before passing current to pull in the transfer switch relay coil and
put the generator in the circuit.
The poop:
Part number TD-68
Sealed Unit Parts Company, Inc.
Allenwood, NJ 08720
"Solid State delay timer"
"Delay on make"
19 to 288 volts
6 second to 8 minute adjustable delay
I don't know where you can buy one, but I'd start with Grainger or Graybar
Electric.
We use them at work on the 24 VAC side of multi ton central air units to
keep them from re-starting when our standby generators first kick in. (I
work at a telephone company).
My recollection is that these only cost about $20 or so, very reliable, and
simpler than an resistor/capacitor type circuit.
I think they use an NE-555 timer inside. They have a single screw hole to
mount them, and they are about 1.5" square with two push on spade lugs.
Simple schematic (text mode)
(relay coil) Gen voltage
|---- load --------.input.---|
. .
Hope this idea helps.
Mark
> -----Original Message-----
> From: owner-gmcmotorhome
> [mailto
wner-gmcmotorhome]On Behalf Of Heinz
> Wittenbecher
> Sent: Thursday, June 11, 1998 12:44 AM
> To: GMC Net
> Subject: GMC: GenSet AC Switch-over relay problem
>
>
> In my '76 Transmode the power panel includes a switch-over relay with a
> built-in delay. This gives the GenSet time to stabilize before the relay
> kicks in moving AC source from shorepower to GenSet.
>
{snip}
Just a simple thought.
Some RV applications use an adjustable delay timer wired in series with the
coil of the relay (delay on make). This 'little black box' has an adjustable
delay before passing current to pull in the transfer switch relay coil and
put the generator in the circuit.
The poop:
Part number TD-68
Sealed Unit Parts Company, Inc.
Allenwood, NJ 08720
"Solid State delay timer"
"Delay on make"
19 to 288 volts
6 second to 8 minute adjustable delay
I don't know where you can buy one, but I'd start with Grainger or Graybar
Electric.
We use them at work on the 24 VAC side of multi ton central air units to
keep them from re-starting when our standby generators first kick in. (I
work at a telephone company).
My recollection is that these only cost about $20 or so, very reliable, and
simpler than an resistor/capacitor type circuit.
I think they use an NE-555 timer inside. They have a single screw hole to
mount them, and they are about 1.5" square with two push on spade lugs.
Simple schematic (text mode)
(relay coil) Gen voltage
|---- load --------.input.---|
. .
Hope this idea helps.
Mark
> -----Original Message-----
> From: owner-gmcmotorhome
> [mailto
wner-gmcmotorhome]On Behalf Of Heinz> Wittenbecher
> Sent: Thursday, June 11, 1998 12:44 AM
> To: GMC Net
> Subject: GMC: GenSet AC Switch-over relay problem
>
>
> In my '76 Transmode the power panel includes a switch-over relay with a
> built-in delay. This gives the GenSet time to stabilize before the relay
> kicks in moving AC source from shorepower to GenSet.
>
{snip}
