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ECTB 51.35

PB_CTB51.35_online-zoom.jpg

Description

Plug-in current transformer for primary nominal currents from 50 A up to 1000 A, secondary nominal current 5 A or 1 A (optional 2 A), accuracy classes 0.5, 0.5s, 0.2 and 0.2s, with type approval by PTB Braunschweig for use for billing purposes.

The new CTB’s connection is arranged with a "cage clamp ®".

Technical Data

Therm. nominal continuous current I_cth: 1,2 x I_N
Therm. nominal short-time current I_th: 60 x I_N, 1 sec.
Max. operating voltage U_m: 1.2kV
Isolation test voltage: 6 kV, U_eff, 50 Hz, 1 min.
Nominal rated frequency: 50...60 Hz
Isolation class: E

Bus bar 1: 50 x 12 mm
Bus bar 2: 40 x 30 mm
Round conductor: 43,7 mm
Width: 85 mm
Height: 105,25 mm
Depth: 52 mm