Name
IEC
ANSI
Description
FLX
-
21FL
Fault locator
MR
-
-
Measurement recorder
VREC
-
-
Measurement value recorder
5.2 Measurements
5.2.1 Current measurement and scaling
The current measurement module (CT module, or CTM) is used for measuring the currents from
current transformers. The measured values are processed into the measurement database and they
are used by measurement and protection functions. It is essential to understand the concept of current
measurements to be able to get correct measurements.
Figure. 5.2.1 - 55. Current measurement terminology
PPRI:
RI: The primary current, i.e. the current which flows in the primary circuit and through the primary side
of the current transformer.
A
AQ
Q-F215
-F215
Instruction manual
Version: 2.04
57