manual transfer switches
- Thread starter ericmen30
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Cold Fusion
Senior Member
- Location
- way north
no ..
Cold Fusion
Senior Member
- Location
- way north
eric -
that's not enough information for us to do us any good - if you some help - tell us a little more about what you are tryin to do
cf
I would think that would be ok.
I don't see a problem either, since it is a manual switch.
Of course, you have to give an ATS the right voltage, but I'm not sure why a MTS couldn't be used on a lower voltage.
Installing a double throw mts for a generator,which will be used for emergency power during a utility outage the mts will be connected to the main service it has a main breaker for the service disconnect
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
Why not?
weressl
Esteemed Member
Of course it can be used. With the second part of your sentence, you already answered that.
Cold Fusion
Senior Member
- Location
- way north
Cause I didn't translate the OP correctly.
I didn't know how to rate a 480/277 MTS at 600V. Nor did I understand how a 120/208 system could be rated up to 600V.
You guys translated it all correctly. I mis-translated.
cf
cesranger
Member
- Location
- Wilmington NC
If your amps and volts do not exceed your ratings, you should be good to go.I think the reason that you don't see it often is cost, 600 volt equipment is higher in cost than your 250 volt equipment. Just my opinion !
ATSman
ATSman
- Location
- San Francisco Bay Area
- Occupation
- Electrical Engineer/ Electrical Testing & Controls
Not in every case, depends on what you have. If there are no relays, CPT's, indicating lights or solenoids in the control circuit then YES.
I have seen GE-Zenith MTS's that use pushbuttons, microprocessor and a solenoid to manually switch the contacts, i.e. the applied voltage has to match the control circuit rating, if there is one.:grin:
TT
- Location
- San Francisco Bay Area, CA, USA
- Occupation
- Electrical Engineer
I think one issue here is that "manual transfer switch" is too vague a term. It can mean a Double Throw Safety Switch, or, as mentioned above, can mean an electrically operated transfer switch system with manual control operation and without the automatic line sensing feature. Manufactuers such as Zenith and Asco who also make ATS systems tend to refer to the non-automatic electrically operated systems as MTS, whereas people like Sq. D, Siemens and Cutler Hammer, who make Safety Switch disconnects, tend to refer to DT Safety Switches as MTS. Both are right, but the difference can be important when discussing this specific issue.
I think that one issue that can differentiate is the UL listing. The one's refered to by the ATS makers will have a UL1008 rating as a "non-automatic transfer switch", the ones that are DT Safety Switches will have a UL98 rating as a Disconnect Device.
I think that one issue that can differentiate is the UL listing. The one's refered to by the ATS makers will have a UL1008 rating as a "non-automatic transfer switch", the ones that are DT Safety Switches will have a UL98 rating as a Disconnect Device.
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