IEEE C62.1-1989 pdf free.IEEE Standard for Gapped Silicon-Carbide Surge Arresters for AC Power Circuits.
Abstract: IEEE C62.1-1989, IEEE Standard for Gapped Silicon-Carbide Surge Arresters for AC Power Systems, describes the service conditions, classifications and voltage ratings, design tests with corresponding performance characteristics, conformance tests, and certification test procedures for station, intermediate, distribution and secondary class arresters. Terminal connections, housing leakage distance, mounting and identification requirements are defined. Definitions are provided to clarify the required test procedures and other portions of the text.
IEEE C62.1 applies to gapped silicon-carbide surge-protective devices designed for repeated limiting of voltage surges on 50 Hz or 60 Hz power circuits by passing surge discharge current and subsequently automatically interrupting the flow of follow current. This standard applies to devices for separate mounting and to those supplied integrally with other equipment.
6.2 Power-Frequency Sparkover Test
The power-frequency sparkover tests serve to establish that the sparkover voltage at power frequency of the assembled
arrester is above the rated voltage by a specified margin. See 8.2 and 9.2.
6.3 Discharge-Current Withstand Tests
The discharge-current withstand tests consisting of high-current short-duration, and low-current long-duration tests
serve to demonstrate the adequacy of the electrical, mechanical, and thermal design of the arrester. See 8.6 and 9.5.
6.4 Impulse Sparkover Voltage-Time Characteristics
The impulse sparkover voltage-time characteristics show the relation between impulse sparkover voltage and time to sparkover for a specified impulse wave shape. See 8.3 and 9.3.
6.5 Discharge-Voltage Tests
Discharge-voltage tests serve to establish the relation between the voltage across the arrester termhals and discharge current at several values of discharge current of specified wave shape. They also show the relation between discharge voltage and voltage rating so that [lie discharge-voltage characteristics of high-voltage arresters may be deteriiiined b extrapolation. See 8.4 and 9.4.
The duty-cycle test serves to establish the ability of the arrester to interrupt follow current successfully and repeatedly under specified conditions. See 8.7 and 9.6.
6.7 Radio-Influence Voltage Test
The radio-influence voltage test provides a measure of the high-frequency voltage generated by an arrester that may cause objectionable communication interference. See 8.8 and 9.7.
6.8 Internal-Ionization Voltage Test
The internal-ionization vohage test provides a measure of ionization current present within an arrester design that may cause deterioration of internal arrester parts. See 8.8 and 9.7.
6.9 Pressure-Relief and Fault-Current Withstand Tests
The pressure-relief and fault-current withstand tests serve to demonstrate that failed arresters will withstand ensuing fault current under specified conditions without violent disintegration. See 8.9 and 9.8.
6.10 Contamination Tests
The contamination tests serve to demonstrate that the arrester will withstand a prescribed power-frequency voltage without sparking over under prescribed surface contamination. See 8.10 and 9.10.IEEE C62.1-1989 pdf free.