ABB UniGear Digital, Engineering Manual

Page: 17 / 112

UNIGEAR DIGITAL S ENS O RS
1VLG5 00007 E 5
KECA 80 C184 / KECA 80 C216
For dynamic current measurement (protection purposes) the ABB sensors KECA 80 C184, and
KECA 80 C216, fulfil requirements of protection class 5P up to an impressive value reaching
the rated short-time thermal current I
th
(31.5 kA). With KECA 80 C184 and KECA 80 C216
sensors, measuring class 0.5 is reached for continuous current measurement in the extended
accuracy range from 5 % of the rated primary current I
pr
not only up to 120 % of I
pr
(as being
common for conventional current transformers), but even up to the rated continuous thermal
current I
cth
(1 250 A or 3 150 A). That provides the possibility to designate the corresponding
accuracy class as 5P400, proving excellent linearity and accuracy measurements.
Figure 3: Current sensor KECA 80 C184 / KECA 80 C216
Technical parameters
– Continuous thermal current 1 250 / 3 150 A
– Rated primary current 80 A / 150 mV at 50 Hz or 80 A / 180 mV at 60 Hz
– Accuracy class 0.5 / 5P400