Name
IEC
ANSI
Description
FLX
-
21FL
Fault locator
CBW
-
-
Circuit breaker wear monitor
THD
-
-
Total harmonic distortion
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
A
AQ
Q-T215
-T215
Instruction manual
Version: 2.04
55