Rectifiers & Electronics supplies High Voltage Power Frequency Spark Testers. Rectifiers & Electronics is an ISO 9001:2000 certified and offers AC/DC High Voltage and High current Testing Equipment and Electrical Machines. This High Voltage Power Frequency Spark Testers are applicable for wire and cable manufacturers, since the start of cable manufacturing. It can hold the efficiency gradient of almost 85 percent. These testers also help in locating and isolating fault easily. These High Voltage Power Frequency Spark Testers are easy to operate and are suitable up to 200 meters per minute.