Protections:
- Function 50P: instantaneous phase overcurrent
- Function 50N: instantaneous neutral overcurrent
- Function 51P: phase inverse time overcurrent
- Function 51N: neutral inverse time overcurrent
- Function 67N: neutral directional protection
- Function 49: external trip
- Break disconnector protection using trigger hold off
SIA-C and SIA-E are self-powered: maintenance is not required
SIA-D model with convencional supply and added features
