Adaptor panel

Two issues here. First - insufficient information. Second - Mixed terminology. We would all love to help but you have to give a little more if you want any kind of decent answer.

By definition, "adaptor panel" implies some sort of conversion. That could be a power supply or some sort of signal converter or even a connector type changer but without more information there is no way to help.

Also, "external control supply" implies that some external control device is getting power from your "adaptor panel".

Lastly the term switchboard describes devices of several very different kinds of devices.

CR4 is a great place to get good answers if there is enough information in the question.

Sorry dear friend....I mean to say that here in India, if you see,all HT switchboards has got one panel nearby the buscoupler section ,which is normally called as adaptor panel.It is connected to 2 sources of DC control supply(220 v dc)for the functioning of relays,breakers & all & got diodes too used for parelleling the the control supplies.Hope I have clarified.Pls answer me.Thank you.

It has nothing to do with control supply. You see! In either the incoming panel or the outgoing panel, the cable is terminated to the terminals at the back (may be at the bottom of the switchgear) and the top terminal of the switchgear is connected to the panel bus bars. But, in bus coupler there is no incoming or outgoing cable connections. The buses have to be coupled and as such both the incoming and outgoing terminals of the bus coupler have to be connected to the panel bus only. The confined space of the bus coupler switchgear panel would not permit this bending & routing of bus bars with required clearances to be maintained too. So, you provide a dummy panel nearby the bus coupler panel whose empty space is used to bend/route the coupling bus bars. As this panel is used to "Adapt" the bus bars to our requirements, this panel is called the "Adapter Panel". Hope it is clear now.

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