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Station: 1 station
Electrodes
1). Material: copper (fixed electrode), stainless steel
(movable electrode )
2). Size: 3.2mm in diameter, 152mm overall length and 300
chisel (fixed electrode), 3.2mm in diameter, 152mm overall length, 600 conical
(movable electrode)
Electrode included angle: 45° to the horizontal
Test voltage: 240V
Arc ignition current: 32.5A±5%A (adjustable)
Arc ignition power factor: COSφ0.5±0 (adjustable)
Arc ignition speed: 254mm/s±25mm/s
Arc ignition frequency: 40 arcs/min (adjustable)
Arc times: 200 times (1~9999 times, digital display,
presettable)
Sample size: 127mm*12.7mm*(2~12)mm
Power supply: 220V/50Hz, 10kVA
The high current arc ignition test apparatus is designed according to IEC60950-1:2001 clause 4.7.3.6, BS/EN60950-1:2001, BS7002:2001, GB4943-2001 and UL746A, IEC60947.1:1999, GB/T14048.1-2000, IEC730.1:1993, GB14536.1-1998 and etc.. It’s used to measure and assess solid insulating material against to resistance to ignition from arcing electrical sources.
A power 240V(AC) / 60Hz is to be supplied to test electrodes (fixed electrode and movable electrode). A series (inductive - resistive) air core impedace is to be provided to yield a short circuit current of 32.5A and a power factor of 0.5. The sample is to positioned with electrodes making initial contact on the surface of the sample, the circuit is to be energied and the cyclic arcing started. The timing of arcs is to be adjusted to a rate of 40 arcs/min, the rate of electrode separation is to be 254±25mm/s, the test is to be continued until ignition of the sample occurs, a hole is burned through the sample, or until a total of 200 cycles has elapsed. The high current ignition performance level is to be assigned base on the mean number of arcs to cause ignition.
