On Wed, 17 Jul 2019 15:34:16 -0700, Jeff Liebermann wrote:
How about a real Gernerac model number?
Thanks for the additional questions as this pretty much has to be typical
stuff - but I just have no experience with debugging transfer switches.
This is the model number of the generator, if that's what you're asking
https://i.postimg.cc/ZKBDgGXs/transfer08.jpg
That Generac Generator is pretty typical stuff out here, if a bit puny,
which is a Generac model 09067-9 8KW (67Amps) propane generator.
Maybe the model number on this placard is ONLY for the solenoids?
https://i.postimg.cc/MKnVYxgH/transfer13.jpg
The part and assembly numbers
on the visible nameplates don't seem to point to a particular model.
This, for example, is the placard on the side of the panel inside:
https://i.postimg.cc/KzWDDzcG/transfer09.jpg
And this sticker is also on the inside of the panel:
https://i.postimg.cc/cLMqkqny/transfer10.jpg
I couldn't find a model number, so how about a search by serial
number?
http://www.generac.com/service-support/product-support-lookup
Now that's interesting! (I can call 888-922-8482 tomorrow.)
http://www.generac.com/service-support/product-support-lookup
The link shows that there "should" be a transfer switch serial number!
http://soa.generac.com/selfhelp/media/a10b5411-0518-44f9-8553-c1b89b4f232c
But I don't see any number that would be a serial number yet.
However while looking I found covers which have slightly different cards:
https://i.postimg.cc/Jn85TgZg/transfer11.jpg
https://i.postimg.cc/Pr7zGN11/transfer12.jpg
Incidentally, you should consider labeling the cables, wires,
terminals, fuses, etc.
I agree. But first I have to figure out what they are.
Why two transfer switches?
I don't know. It's got to be standard stuff. Everything has to be to code.
I suspect each box controls one hot wire, as when I pulled the Buss fuses,
one side of the house turned off when the generator was running with no
power coming in from PG&E.
Both boxes seem almost perfect symmetric, so I think it's just one hot for
each box. But that's why I asked about a typical setup, as this must be to
code.
Got a schematic of how you wired it?
It came with the house, and it's to code since the house has all the
permits filled, and it used to work but then stopped working about a year
or two ago.
What happens is that the power goes out, and then the generator turns on,
but the two fist-sized solenoids don't trigger. I can trigger them manually
by putting this handle which is screwed to the box into the big solenoid.
https://i.postimg.cc/7PNgnwJV/transfer15.jpg
Moving that lever down in each solenoid turns the transfer switch on.
https://i.postimg.cc/nh3RRqs3/transfer14.jpg
But that's supposed to happen automatically when the power goes out
and the generator turns on.
If not, trace the wires and make one.
While I was looking for the serial number, I found the closest thing to a
schematic, which is this placard on the inside of the cover (which has been
off for a long time since the transfer switch no longer turns on
automatically when the power goes out.
*AUTOMATIC TRANSFER SWITCH FOR USE ON STANDBY SYSTEMS*
Suitable for control of motors, electrical discharge lamps, tungsten
filament lamps, and electric heating equipment where the sum of the motor
full-load ampere ratings and the ampere ratings of other loads do not
exceed the ampere rating of the switch and the tungsten load does not
exceed 30 percent of the switch rating.
*AUTOMATIC SEQUENCE*
*UTILITY FAIL* - Utility voltage sensor senses when utility voltage level
is below 60% of nominal. Engine start sequence is initiated after a
6-second time delay.
*ENGINE WARMUP* - Time delay to allow for engine warmup before transfer.
Fixed at 15 seconds.
*STANDBY VOLTAGE* - Standby output voltage must be above 50% of nominal
voltage before tansfer is allowed.
*TRANSFER* - Switch transfers load from utility to standby supply; occurs
after standby voltage is above set levels.
*UTILITY PICKUP* - Utility voltage sensor. Voltage pickup level is 80% of
nominal voltage.
*RETRANSFTER* - Time delay after utility voltage supply is above pickup
level before load is transferred from standby to utility. Fixed at 6
seconds.
*ENGINE COOLDOWN* - Time delay for engine no-load cooldown. Fixed at 1
minute.
System will operate automatically every seven days from the time of initial
setting to ensure proper operation. Consult Owner's Manual for further
explanation of Transfer System operating and features.
Systems shall be tested periodically on a schedule acceptable to the
authority having jurisdiction, to assure maintenance in proper operating
condition.
Enclosure is type 1, suitable for indoor installation.
When protected with 200 ampere maximum (110a rated device) or 400 ampere
maximum (200a rated device), Class J, T fuses, this switch is suitable for
use on a circuit capable of delivering not more than 200,000 RMS
symmetrical amperes, 250 volts maximum.
When used with 200 ampere maximum circuit breaker 100 ampere device; 400
ampere maximum curcuit [sic] breaker 200 ampere device; (type G.E. TJK or
Westinghouse HLC) this switch is suitable for use on a curcuit [sic]
capable of delivering not more than 10,000 RMS symmetrical amperes, 250
volts maximum.
Connect utility, standby generator supply and customer load as shown.
*Transfer Switch:*
N1 N2 N3 === Utility Supply
T1 T2 T3 === Customer Load
E1 E2 E3 === Standby Supply
Terminal connectors tightening torque is 50 in-pounds (100a rated device)
or 250 in-pounds (200a rated device). Control wiring terminal connectors
tightening torque is 11 inch-pounds. 79959 D
https://i.postimg.cc/Jn85TgZg/transfer11.jpg
https://i.postimg.cc/Pr7zGN11/transfer12.jpg