ABB RELION 611 Series Technical Manual page 360

Section 7
Measurement functions
354
Limit value supervision
The limit value supervision function indicates whether the measured value of
X_INST exceeds or falls below the set limits. The measured value has the
corresponding range information X_RANGE and has a value in the range of 0 to 4:
• 0: "normal"
• 1: "high"
• 2: "low"
• 3: "high-high"
• 4: "low-low"
The range information changes and the new values are reported.
GUID-AAAA7367-377C-4743-A2D0-8DD4941C585D V1 EN
Figure 172: Presentation of operating limits
The range information can also be decoded into boolean output signals on some of the
measuring functions and the number of phases required to exceed or undershoot the
limit before activating the outputs and can be set with the Num of phases setting in the
three-phase measurement functions CMMXU and VMMXU. The limit supervision
boolean alarm and warning outputs can be blocked.
Table 398: Settings for limit value supervision
Function
Three-phase current measurement
(CMMXU)
Table continues on next page
Settings for limit value supervision
High limit
Low limit
High-high limit
Low-low limit
1MRS757454 D
A high limit
A low limit
A high high limit
A low low limit
611 series
Technical Manual