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design

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  Frequently Asked Questions
Q:  Does NTC have office in Tehran? If yes, where is it?
Q:  How can I contact relevant persons in NTC?
Q:  How can I determine my requirement regarding the rated current of CT?
Q:  How can I determine the rated burden of each secondary?
Q:  How can I order for NTC products?
Q:  How the cables to be connected to the secondary terminals are brought in the terminal box?
Q:  If the secondary of PT has reconnection, what shall I do with the other terminals?
Q:  If we have taps in secondary of CT, what shall we do with the extra terminals?
Q:  If, by mistake, the secondary of a CT is open circuited, what shall I do?
Q:  If, by mistake, the secondary of a PT is short circuited, what shall we do?
Q:  What are NTC Products in HV range?
Q:  What are the minimum cross section area and maximum length of cable(s) from instrument transformers to the control room?
Q:  What are the products of Nirou Trans Company?
Q:  What is the application of F-Terminal in HV current transformers and test tap in condenser bushings and why they shall be connected to earth when energized and not in use?
Q:  What MV products are being produced in NTC?
Q:  What range of specifications are covered by each of NTC products?
Q:  What will happen if the secondary of a CT is open circuited?
Q:  What will happen if the secondary of a CT is short circuited?
Q:  What will happen if the secondary terminals of PT are open circuite?
Q:  What will happen, if the secondary terminals of PT are short circuited?
Q:  Which standards govern design, production and test of NTC products?
Q:  Why there is no need to provide corona ring in NTC products?
design
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