Saudi Arabian Grid Code May 2024

The TSP shall connect a telecommunications medium to the meter/recorder that will allow for remote downloading of metering data. Chapter 7 - Metering Code The Saudi Arabian Grid Code Updated Version: May 2024 7.7.10 The TSP shall be enabled to remotely interrogate a Meter or recorder on a daily basis or as mutually agreed with a User. 7.7.11 Meters shall be visible and accessible, but the access to such meters shall be authorized only by the TSP. 7.7.12 The metering data retrieval by remote link, or by on-Site method in the case of a persistent telecommunication problem, shall be a secure process whereby Meters or recorders are directly interrogated to retrieve billing information from their memories. 7.7.13 The TSP shall be responsible for the validation and substitution of metering data. 7.7.14 In principle, Check metering data, where available, shall be used to validate metering data provided that Check Metering Equipment accuracy conforms to the standards of this section. Metering Equipment Standards 7.8.1 All Metering Equipment shall comply with the provisions set out in this Metering Code. These provisions may be revised from time to time in consultation with the Regulator to take account of changing technologies or the requirements of the industry. 7.8.2 The Metering Equipment shall be accurate within the prescribed limits for such Metering Equipment referred to in the relevant Connection Agreement or set out in the Metering Code. 7.8.3 The accuracy of the various items of Metering Equipment shall conform to the relevant IEC standards (or their equivalent Saudi national standards). 7.8.4 The Meters shall be calibrated by an independent calibrating agency accredited by the Saudi Accreditation Center for this purpose. The User shall provide calibration certificate with expiry date of calibration. 7.8.5 Voltage Transformers (VTs) (i) The Voltage Transformers shall comprise three (3) units for a three- phase set, each of which complies with IEC Standard 60044-2: Instrument Transformers — Part 2: Inductive Voltage Transformers (or its equivalent ANSI/IEEE/Saudi national/TSP standard) for metering, and shall be of the 0.2 accuracy class. These Voltage Transformers shall be connected in the configuration as agreed in the relevant Connection Agreement. Chapter 7 - Metering Code The Saudi Arabian Grid Code Updated Version: May 2024 (ii) The voltage drop in each phase of the Voltage Transformer connections of the same accuracy and class shall not exceed 0.2 V. It shall be connected only to a Main Meter with a burden that shall not affect the accuracy of measurement. 7.8.6 Current Transformers (CTs) (i) The Current Transformers shall comprise three (3) units for a three- phase set, each of which complies with the IEC Standard 60044-1: Instrument Transformers — Part 1: Current Transformers (or its equivalent ANSI/IEEE/Saudi national/TSP standard) for metering, and shall be of 0.2 accuracy class. It is preferred that two (2) Current Transformer cores with corresponding number of secondary coils per phase be provided between the connection box and the terminal of the metering element on the Meter so that the Current Transformer connections for checking Meter pulses can be completely separated from those provided for the Meters. (ii) The Current Transformer’s rated secondary current shall be either 1 or 5 amperes. The neutral conductor shall be effectively Grounded at a single point and shall be connected only to a Main Meter with a burden that shall not affect the accuracy of measurement.