element assembled : list
r1 = 15k 0.25w , r2 = 680k / 2w , r3 = 270r / 3w . c1 = 103 / 1 kv , c2 = c3 = c4 = 1000uf / 35v . d1 = d2 = d3 = d4 = d5 = 1n4007 , d6 = d7 = 1n4749a
note : if you are bought kit : kit spare parts is need your own welding installation
audio power supply activate the protection high power soft start plate
pcb : specification FR4 90 mm x 60mm x1.6mm
finished board supreme : office 25mm
upgrade version type , the folwing rifa ( force made ) safety capacitor , wire shelving more reasonable , more beautiful , voltage-stabilizing increase circuit extends relay lifespans . while integrated switch connector ( compatible 7.62 terminals and insert ) , more convenient to install
buy namely matching insert spring insulating sleeve
plate on fuse default is 10a 's , please if required
working principle of :
when soft start plate continuousheating , 220v after RC the depressurizing current-limiting after giving three electrolytic capacitor charge , to after about 3 seconds capacitor can be filled , full after can give relay Merit electric , at this time relay only pickup . whereas 4 negative temperature coefficient ( ntc ) and relay both contacts parallel , also is said relay current pickup before is after negative temperature coefficient ( ntc ) lirait flow of only just arrived appliance ( to soft start function up ) , whereas 3 seconds relay pickup put negative temperature coefficient bioses , direct current relay the misclosure relay is also good working condition . also done load voltage rose to smooth sd0109 , protection rectifier bridge pond and big , effectively electric appliance lifetime worth : attention according to the principle ugly supply power switch only in soft arefunctioning plate 220v input before ( plate have connector on ) .
delay time about 3 seconds .
join the fuse and electrical isolation groove ( industry safety code requirement )
comrie , please see : as follows
indicator led one makes the can see eye whether the input work condition
spark capacitor effective protection relay , for soft start plate chian .
the measred maximum power up to 2000w .
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