ABB Relion 670 Series Technical Reference Manual page 954

Section 15
Monitoring
15.6.1
15.6.2
15.6.3
948
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.
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 below low-low
value is: limit
Output:
LOWLOW High
LOW
NORMAL
HIGH
HIGHHIGH
Function block
RANGE_XP
RANGE* HIGHHIGH
HIGH
NORMAL
LOW
LOWLOW
IEC05000346-2-en.vsd
IEC05000346 V2 EN
Figure 471: RANGE_XP function block
between low‐ between low
low and low and high limit
limit
High
High
1MRK505222-UUS C
between high- above high-high
high and high limit
limit
High
High
Technical reference manual