Ac Spark Tester designed for checking the quality of PVC coated wires during manufacturing at shop floor. The PVC wire is passed through brass ball chains which carry high voltage. If any pin hole comes in PVC, a spark develops and electromagnetic counter counts the fault. The spark tester is necessary for every cable manufacturing unit.
The equipment uses a high frequency oscillator circuit for rising frequency to search the fault at low leakage current and signifies that as a fault, he fault is displayed to the operator by means of a visual indicator and audible. The equipment can test a variety of cable at various voltages for which KV setting & sensitivity setting is provided. The Power Frequency Spark Tester is a Conventional Spark tester, being used by wire and cable manufacturers, since the start of cable manufacturing. These spark testers hold the efficiency gradient of approximately 85%. They leave a burn mark on the cable/wire at the point of fault, which makes it easier to locate and isolate / mend the fault
Construction:
TRANSFORMER: A double wound step up transformer is the most important part of the spark tester. The transformer is so designed that the input current remains within set limit in order to protect the transformer against short circuit. The transformer is made of CRGO core, wound with very high quality super enameled copper wire and polyester film/paper is used for insulation.
VOLTAGE CONTROL: A step-less auto-transformer is used for controlling the output form zero to maximum. The auto transformer has built in arrangement for zero start interlocking.
INPUT VOLTAGE: 230 Volts single phase 50Hz. AC Supply
OUTPUT VOLTAGE: Up to 15 KV CAPACITY: Up to 1 KVA
METERING: Voltmeter is provided in L.T. side, to indicate HV Output.
ELECTRODE: Brass ball chain electrode is having a number of balls to ensure 100% contact with the coated wire which passes through the electrodes.
CONTROL: Knob to control the AC output from zero to maximum.
PROTECTION:
· ON-OFF switch with fuse provided to protect the unit in case of short circuit. HV will not actuate unless variance is at zero position.
· The HV trips off automatically if anybody tries to reach ball chain.
· FAULT INDICATORS: Audio Alarm is provided to indicate fault which passes through ball chain.
FAULT COUNTER: An electro-magnetic counter is provided to count the faults with resetting knob.