Beyond breakers, the Acti9 range fills the rest of the distribution board: iTL impulse relays for lighting control from multiple pushbuttons, iCT modular contactors for switching lighting and heating loads, and iPRD surge protection devices that clamp transients before they reach sensitive equipment.
iCT modular contactors are rated for AC-7a lighting and heating duty — do not substitute them for a motor contactor.
iPRD surge arresters must be coordinated with an upstream disconnector and matched to the earthing system (TT, TN-S).
Impulse relays are chosen by coil voltage and contact configuration; confirm both.
Check module width in DIN units before assuming a device will fit the remaining board space.
Frequently asked questions
Where should a surge arrester be installed?
As close to the incomer as practical, with the shortest possible connection leads — lead length materially degrades protection.
Can I use an iCT contactor for a motor?
No. Modular contactors are designed for resistive and lighting loads. Motor switching needs a TeSys contactor with the appropriate AC-3 rating and overload protection.
Do surge arresters need replacing after a strike?
Yes, once the status indicator shows the cartridge is spent.