This equipment is made to test the electrical insulating material by exposing it to Arcing under high voltage. The test specimen is placed under electrodes, spaced at a distance of 6.35mm as per ASTM D 495. An Arc is generated between these electrodes. The test consists of 7 Cycles starting from cycle 1. As the cycles progress the test becomes progressively severe. The test specimen that has lower insulating strength fails earlier in the first few cycles while those with higher insulating strength sustain higher cycles. The test is halted when the specimen fails and the time taken from the start of the test till the failure is used for comparing INSULATING STRENGHTS (time in seconds) of various insulating materials. The test specimen may fail by forming a conducting path, by burning into flames, by melting or any other physical, visual deformities.
The test method as per ‘ASTM D 495 – Standard Test Method for High-voltage, Low-current Dry Arc Resistance of Solid Insulating Material’ is pre-programmed in the PLC. Please refer to ASTM D 495 for more details. This equipment complies testing as per other standards as well, such as IEC 61621 (Dry, solid insulating materials - Resistance test to high-voltage, low-current arc discharges), UL 746 A (Polymeric Materials – Short Term Property Evaluations Testing For Electrical Properties) and IS 14672 (Method of Test for High Voltage Low Current Dry Arc Resistance of Solid Electrical Insulation).
For all products made by us to test as per UL 746 A, please download this PDF file.Designed to comply with the requirements of ASTM standard D495-99(2004) & UL746A (CL. 20).
SIEMENS make HMI system with touch screen operation to set the test parameter and control the sequence.
Test chamber with Door Interlock System to protect user from direct contact of High Voltage.
Emergency OFF provision.
Different types of gauges are provided to maintain angle of electrodes & distance between two electrodes.
Input supply voltage 230 V (±10 %)/ 50Hz.
Adjustable Test Voltage 15 KV.
PLC based logic controller automatically conduct test at 10, 20, 30 & 40 mA ranges as per the standard.
The unit is programmed to operate in 7 cycles. Each cycle will be for duration of 60 seconds.
Enclosure – Elegant design with Aluminium extruded profile.
Lab view based testware to control sequence of operation.
NI interface system.
Adjustment of voltage will be automatic through PC.
Total test time & current can be selected through PC.
There will not be any manual control.
PC will record all the parameters & give results as pass/fails on screen.
Results will be stored on PC as per test samples & date.
PC Either HP or Dell make. OS will be Windows 10 license.
The test kit helps the user to asses performance of an insulator by subjecting it to high voltage arcing. The insulator under test is expected to passthe complete test cycle as per the ASTM D495 table
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