Common use of Voltage transformers Clause in Contracts

Voltage transformers. Two VTs or one VT with two or more secondary winding sets in accordance with IEC Standard 186 and with a minimum standard of accuracy class 0.2 shall be provided. The VT secondary winding supplying the main Meters shall be dedicated to that purpose. The VT used for secondary winding supplying the check Meter may be used for other purposes provided the overall accuracy requirements in Section 4.2.1 are met and evidence of the value of the additional burden is available for inspection by Scottish Settlements. The additional burden shall not be modified without prior notification to Scottish Settlements, and evidence of the value of the modified additional burden shall be available for inspection by Scottish Settlements. A VT test certificate(s) showing errors at the overall working burden(s) or at burdens which enable the working burden errors to be calculated shall be available for inspection by Scottish Settlements. The total burden on each secondary winding of a VT shall not exceed the rated burden of such secondary winding. Separately fused VT supplies shall be provided for each of the following:- 5.1.2.1 the main Meter; 5.1.2.2 the check Meter; and Superseded 5.1.2.3 any additional burden, and in each case such fuses shall be located as close as practicable to the VT.