The Station Protection Unit (SPU) is an indoor rated sheath grounding unit used in the cable vault or building entrance point to safely terminate cable armors.
An SPU is also used in place of a 2901 Line Protection Unit when cable location tones are employed as part of the cable management system. The SPU includes a bond bar which can be opened for isolating and testing. The SPU is a surge arrestor device using a three element maximum duty total failsafe gas tube arrestor to provide high surge current protection and transient suppression. An SPU is typically used at the termination end of a monitored cable or strap through site.
3.5 x 3 x 2.5 in (8.9 x 7.6 x 6.4 cm)
0.5 lbs (0.23 kg)