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Chris Parson
Chris Parson,
Category: Electrical
Satisfied Customers: 11
Experience:  Electrician at L.E. Myers
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I have a siemens auto transfer switch, PTST400A35 with no

Customer Question

i have a siemens auto transfer switch, PTST400A35 with no control box. I do not have a Generac generator. The switch is installed. I need to know how this device is electrically controlled.
Submitted: 2 months ago.
Category: Electrical
Expert:  Chris Parson replied 2 months ago.

Hello my name is ***** ***** I will be trying to help you resolve your issue. You need to know how this switch is electrically controlled?

Customer: replied 2 months ago.
Expert:  Chris Parson replied 2 months ago.

Auto Transfer Switches work by allowing your utility power to power your house, when the utility power fails (outage, Fallen tree limb on the line) the switch automatically lets the generator power the house until the utility power comes back on, then it will switch back and start using utility power again.

Customer: replied 2 months ago.
I know all that, this is a PTST400A35, Siemens auto transfer switch that I need a wiring diagram for. Siemens will not sell me the auto control box since i bought a Kohler gen set. This is a commercial 400 am single phase system. Thanks
Expert:  Chris Parson replied 2 months ago.

I have attached a wiring diagram here that I finally as able to get from them. I am sorry it took so long.

Customer: replied 2 months ago.
this in no way looks like what is in the switch or what i need, thanks for trying, siemens tech support has told me they will not give me the actual diagram, this ends our conversation. I am not satisfied, please do not bill my credit card. Sincerely, ***** *****

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