Application: by mounting the phase clamps on the rectangular section bar, followed by the tightening of the clamp driving screw.
Classic / automatic phase clamps must be handled using an insulating stick according to the voltage of the installation, provided with “RO bayonet’’ coupling system.
Constructive shapes: three-phase.
Constructive types of phase clamps:
Three-phase short-circuiting device consisting of:
Packing: waterproof bag.
– Multipurpose modular insulating stick type PMU 20-1 B/ba / PMU 110-2 B/ba.
|General technical characteristics of short-circuiting devices applicable on rectangular section bars|
|Earthing cable cross-section Sp (mm2)||16||25||35||50||70||95||120|
|Nominal short-circuit current fort = 1 s Isc (kA)||4||6.25||8.75||12.5||17.5||23.75||30|
|Shock (peak) nominal current for t = 0,02 s Isd (kA)||10||15.63||21.9||31.25||43.75||59.38||75|
|Test short-circuit current for t = 1 s (kA)||4.6||7.2||10.06||14.38||20.13||27.31||34.5|
|Test (shock) current for t = 0,02 s (kA)||11.5||17.97||25.16||35.94||50.31||68.3||86.25|
|Power factor (according to SR EN 61230)||2.5||2.5||2.5||2.5||2.5||2.5||2.5|
|Phase clamp type||Classic clamp (C)||Automatic clamp (CA)|
|Short-circuiting cable length – three-phase short-circuiting device lf (m)||max. 1.5||max. 1.5|
|Earthing cable length – single-phase / three-phase short-circuiting device lp (m)||max. 7||max. 7|
|Thickness of the flat bar where the phase clamp can be mounted g (mm)||max. 40||max. 37|
The three-phase short-circuiting device includes the following components: