Voltage regulation loaded Reg Vld = [MAX(Vld,max -Vnom; Vnom - Vld, min)/Vnom ] x 100% Frequency regulation open circuit Reg Foc = [MAX(Foc,max -Fnom; Fnom - Foc, min)/Fnom ] x 100% Frequency regulation loaded Reg F ld = [MAX(Fld,max -Fnom; Fnom- Fld, min)/Fnom] x 100% Note: Function MAX(value 1; value 2) returns the maximum of value 1 and value 2. Example: In the calculation MAX(Voc max-Vnom; Vnom -Voc min) use the maximum value of either upper (Voc max-Vnom) or the lower (Vnom-Voc min).” Total Harmonic Distortion THD = SQRT(sum of all squares of amplitude of all harmonic voltages/square of the amplitude of the fundamental voltage) x 100% Responsibility of the laboratory Laboratory power source measurements shall be performed upon initial installation, 5.1 modification and repair of the laboratory power source(s) to confirm that appropriate power quality exists at the test connection locations. 5.2 In accordance with ISO/IEC clause 5.3.2, it is the responsibility of the laboratory to monitor, control and record characteristics of the laboratory power source to ensure continued conformance with the requirements. Considerations to be taken into account include changes in characteristics of the power as supplied by the electric utility (or other source), changes in load conditions on the power source substation due to power consumption of neighboring businesses and effects of other testing being conducted in the laboratory. General Instructions given in this document are to be followed to assure test consistency and repeatability. Equipment 7.1 Instruments: 7.1.1 Voltmeter 7.1.2 Ammeter 7.1.3 Frequency meter 7.1.4 Total harmonic distortion analyzer 7.1.5 Resistive loads 7.1.6 Accuracy of meters shall conform to the most recent version of CTL DSH-251. 7.1.7 calibrations are to be traceable to SI units. Note 1: Other types of equipment providing equivalent functionality may be used. Requirements 8.1 When not otherwise specified in the testing standard, the test connection location shall meet the following requirements:
Voltage regulation loaded Reg Vld = [MAX(Vld,max -Vnom; Vnom - Vld, min)/Vnom ] x 100% Frequency regulation open circuit Reg Foc = [MAX(Foc,max -Fnom; Fnom - Foc, min)/Fnom ] x 100% Frequency regulation loaded Reg F ld = [MAX(Fld,max -Fnom; Fnom- Fld, min)/Fnom] x 100% Note: Function MAX(value 1; value 2) returns the maximum of value 1 and value 2. Example: In the calculation MAX(Voc max-Vnom; Vnom -Voc min) use the maximum value of either upper (Voc max-Vnom) or the lower (Vnom-Voc min).” Total Harmonic Distortion THD = SQRT(sum of all squares of amplitude of all harmonic voltages/square of the amplitude of the fundamental voltage) x 100% Responsibility of the laboratory 5.1 Laboratory power source measurements shall be performed upon initial installation, modification and repair of the laboratory power source(s) to confirm that appropriate power quality exists at the test connection locations. 5.2 In accordance with ISO/IEC clause 5.3.2, it is the responsibility of the laboratory to monitor, control and record characteristics of the laboratory power source to ensure continued conformance with the requirements. Considerations to be taken into account include changes in characteristics of the power as supplied by the electric utility (or other source), changes in load conditions on the power source substation due to power consumption of neighboring businesses and effects of other testing being conducted in the laboratory. General Instructions given in this document are to be followed to assure test consistency and repeatability. Equipment 7.1 Instruments: 7.1.1 Voltmeter 7.1.2 Ammeter 7.1.3 Frequency meter 7.1.4 Total harmonic distortion analyzer 7.1.5 Resistive loads 7.1.6 Accuracy of meters shall conform to the most recent version of CTL DSH-251. 7.1.7 calibrations are to be traceable to SI units. Note 1: Other types of equipment providing equivalent functionality may be used. Requirements 8.1 When not otherwise specified in the testing standard, the test connection location shall meet the following requirements:
od-5010_ed.1.0.docx