The innovative and patented CTC Technology (Central Thermal Control) is an entirely new designed disconnection technology.
It is safer, faster, and more compact than previous disconnections. Its cutting-edge technology has been rewarded with nume- rous patents for CITEL. It counters the weaknesses of previous disconnection devices primarily through:
The innovative disconnection device of the CTC technology is thermosensitive. Due to its identically short conductor lengths compared to conventional circuits, the heat generated in each MOV during a dissipation process (Joule heat) reaches the disconnector faster.
Furthermore, the connection of all MOVs to a single cut-off point allows the Joule heat of all installed MOVs to act simultaneously on the single heat point of the solo disconnection device.
As a result in case of overstress or end-of-life scenario, the envelope temperature of the SPD remains low during safety disconnection. The heat is concentrated in the CTC itself and the SPD therefore disconnects from the mains much faster in the event of an overload. This means a significant increase in safety.
The innovative CTC technology uses several MOVs, but only one disconnection device. This solo disconnection is spatially positioned within the centre of the installed MOVs.
Compared to conservatively constructed SPDs with multiple MOVs, each MOV is no longer connected to a separate disconnection device, but all MOVs in the SPD are connected to the same disconnection.
This arrangement results in a significantly more compact design of the SPD: With only 2.5 divisions (45 mm), the DPVN is about one centimeter slimmer than SPDs with comparable protective capacity.
Furthermore, the distances and conductor lengths between the disconnection device and all MOVs are identical.
The innovative CTC technology does not only disconnect faster, but also safer and more reliable.
Minimisation of the short-circuit risk: As soon as the remaining protective capacity of an MOV is so low that safe operation can no longer be guaranteed, the CTC-Technology disconnects the entire SPD from the grid at all poles. This ensures that the system operator replaces all MOVs and that no pre-stressed MOVs remain in use unnoticed. The danger of a MOV short-circuit is thus averted and safe system operation is restored.
More safety through double separation: