EPC 19 - Key Safety Issues of Transformers Flashcards
1
Q
What essential action must be taken if the ammeter, connected to a current transformer, is to be removed for calibration?
A
The transformer secondary shall be left short circuited.
2
Q
State wether the following statement is TRUE or FALSE: According to AS/NZS3000:2018, an autotransformer shall not be used to supply electrical equipment with a voltage rating less than the highest input or output voltage of the autotransformer. (State the clause number)
A
TRUE.
AS/NZS 3000 Clause 4.14.4
3
Q
With reference to a step-up transformer, is it permissible to connect a protective earthing conductor between the primary and secondary windings? (State the clause number)
A
YES.
AS/NZS 3000 Clause 4.14.5 (Exception)
