Control Transformer Help
Control Transformer Help
(OP)
Hello
I am building a control cabinet that is destined for Austria. In this cabinet are various devices that will accept input power from 85vac to 260vac 50/60Hz. I am going to install a 400:230 single phase transformer to power these devices. The size will be around 1 to 1.5 kva. I also want to provide a household plug to power trouble shooting equipment.
My question is with respect to grounding the secondary of the 400:230vac transformer. Should I ground the center tap or the bottom tap.
If I ground the center tap I will need 2-pole circuit breakers for all of my circuits?
If I ground the bottom tap of the transformer I only need 1 pole circuit breakers. If I do this, will it suitable for the household plug? The household plugs are of Type C(I think) They have 2 round prongs for power plus a ground prong. If I ground the bottom tap of the transformer it will meen two of the prongs for the plug will be grounded. Is this correct?
Thanks
I am building a control cabinet that is destined for Austria. In this cabinet are various devices that will accept input power from 85vac to 260vac 50/60Hz. I am going to install a 400:230 single phase transformer to power these devices. The size will be around 1 to 1.5 kva. I also want to provide a household plug to power trouble shooting equipment.
My question is with respect to grounding the secondary of the 400:230vac transformer. Should I ground the center tap or the bottom tap.
If I ground the center tap I will need 2-pole circuit breakers for all of my circuits?
If I ground the bottom tap of the transformer I only need 1 pole circuit breakers. If I do this, will it suitable for the household plug? The household plugs are of Type C(I think) They have 2 round prongs for power plus a ground prong. If I ground the bottom tap of the transformer it will meen two of the prongs for the plug will be grounded. Is this correct?
Thanks






RE: Control Transformer Help
All the metallic parts of all appliances has to be bonded to ground.The neutral and the grounding wire has to be continuous without any breaker ,switch or fuse.
There is a possibility to avoid appliance bonding to ground if this device is double-insulated .Also, instead of residual-current-operated circuit breaker, one may use a rapid disconnecting means of maximum 0.2 sec trip time. But I don't
propose to use it instead.
Regards