Section 6 Read measured values
About this chapter
This chapter describes measurement categories and how to locate them using the HMI.
Each measurement category has a section of its own that includes a general description
of
the type of quantity being measured and the path in the local HMI to the measurement.
6.1 Overview
The measurement menu contains primarily analog measurement data. External signals
can also be viewed as they are or as they appear in the Signal Matrix Tool (SMT).
These signals are a virtual representation of the hard wired signals on the various
inputs and outputs. SMT is only accessible via PCM600 and is intended to simplify the
configuration of the IED. It allows hardware changes to be made without having to
reconfigure the internal logic. Signals that can be used in SMT are indicated with the
Suffix SMT.
The functions available under measurements are outlined below.
1. Analog primary values are the quantities measured on the primary side of the
current and voltage transformers (CTs and VTs).
2. Analog secondary values are the quantities measured on the secondary side of the
current and voltage transformers. These are the quantities measured on the
Transformer module (TRM) inputs.
3. Analog mean values are the quantities measured at the inputs of the milliampere
module (MIM).
4. Under Monitoring a number of submenus are available. These include Service
values, Current phasors, Voltage phasors, Current sequence components and
Voltage sequence components.
5. Metering displays the pulse counter and energy calculation and demand handling
functions. The measurements available for pulse counter show pulse counter status
data.
All measurement descriptions in this document reflect the maximum number of
hardware units possible in any application. In reality the hardware in the IED will be
chosen according to a particular application. For example, it is possible to equip a 1/1 x
19” case IED with 14 I/O modules. In reality fewer I/O modules may be installed. In
1MRK506276-UUS B Section 6
Read measured values
29
Operator's manual
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