ABB Relion 670 series - Introduction; Principle of operation; Function block

15.6.1 Introduction
The current and voltage measurements functions (CVMMXN, CMMXU, VMMXU
and VNMMXU), current and voltage sequence measurement functions (CMSQI and
VMSQI) and IEC 61850 generic communication I/O functions (MVGGIO) are
provided with measurement supervision functionality. All measured values can be
supervised with four settable limits: low-low limit, low limit, high limit and high-high
limit. The measure value expander block (RANGE_XP) has been introduced to enable
translating the integer output signal from the measuring functions to 5 binary signals:
below low-low limit, below low limit, normal, above high-high limit or above high
limit. The output signals can be used as conditions in the configurable logic or for
alarming purpose.
15.6.2 Principle of operation
The input signal must be connected to a range output of a measuring function block
(CVMMXN, CMMXU, VMMXU, VNMMXU, CMSQI, VMSQ or MVGGIO). The
function block converts the input integer value to five binary output signals according
to
table 585.
Table 585: Input integer value converted to binary output signals
Measured supervised
value is:
below low-low
limit
between low‐
low and low
limit
between low
and high limit
between high-
high and high
limit
above high-high
limit
Output:
LOWLOW High
LOW High
NORMAL High
HIGH High
HIGHHIGH High
15.6.3 Function block
IEC05000346-2-en.vsd
RANGE_XP
RANGE* HIGHHIGH
HIGH
NORMAL
LOW
LOWLOW
IEC05000346 V2 EN
Figure 471: RANGE_XP function block
Section 15 1MRK505222-UUS C
Monitoring
948
Technical reference manual