Digital Coupling Module KBD-1/L
Switching on lights can lead to very high inrush
current peaks.
A closing contact can bounce 3 to 7 times until it has
closed completely. This creates a light arc which can
melt the contact surface. Micro-welding can take
place when the contact cools down (contact sticks).
To prevent sticking of the contact, relays with a
preceding tungsten contact are used.
Inrush current peaks for filament lamps of 165 A /
max. 20 ms, or for fluorescent lamps of 800 A / max.
200 µs can be switched with these.