Indicator soft turn on (IMV) is designed to improve the consumer properties of wall switches and keyboards to save the working life of the lamps filament. The IIR provides economical (50% power) operation mode lamps and a soft (two-stage) their incorporation to increase the lifespan.
In an unlit room glow led HL2 indicates the location keys SA1 series switch that you want to press to activate economical mode of operation. The same key should be pressed first for soft the inclusion and later 0,1...0,5 s - SA2 (normal mode. 100% power). Green light two colour led glow HL2 indicates economical operation the lamp HL1.
As you know, the filaments of incandescent lamps in the cold state are small resistance. Therefore, when switching on the lamps until they were warmed and their resistance is not increased, there is a inrush current, 8...10 times the nominal lamp current. This "starter" overload leads to gradual the destruction of the filaments and lamps burn out more often than it is when you turn.
The IIR allows 3...10 times to increase the life of the lamps subject to proper power-up sequencing. You must first close the key SA1 ( the color of the indicator changes from red to green), and after 0,1...0,5 s - SA2 (the indicator goes out).
In original (open) state SA1 and SA2 indicator HL2 glows red color, as through the elements of HL1.R1 and HL2 alternating current. Green part of HL2 also radiates, but because of the greater brightness •red" part, green tint is virtually invisible. Current. flowing through the circuit HL1-R1-HL2 incomparably small with respect to operating current HL1, so the lamp is not lit.
When the closure SA1 positive half of the mains voltage through the diode VD1 arrive on the lamp HL1, and it glows dimly. Contact closure A bypasses the "red" part of the led HL2. and it changes the light color to red on the green. If you do not need economical operation, press SA2. The lamp HL1 glows with full intensity, since both half-line voltage now flow through her. and the indicator HL2 shunted closed contacts SA2 and goes out.
In the IIR applied to the resistor OMLT-2 W, candlestick wall switch any design (with a combined total contact), designed for mains voltage (220V). Dual color led indicator KIPDA can be replaced foreign L-15VE6W. Diode VD1 is replaced by others, for example, D226V. KD105B. KDA. When used as HL1 incandescent lamps of 100 watts and more should be applied to the diodes CDW or CDC (M. P).
The Elements Of R1. HL2. VD1 are installed in the housing of the switch. To increase the mechanical strength of the circuit connection point of R1 and HL2 recommended soldering on the circuit petal.
When specified in the scheme the value of the resistor R1 is the load factor by power is only 0,17. This reserve is required for minimal heating device. To increase the brightness of the indicator can decrease the resistance of the resistor twice, but in the cover of the switch bottom, and from above, it is desirable to drill a few ventilation holes 1.5...2.5 mm
Author: A. Oznobishin, Irkutsk