ABB REL 551-C1*2.5 - Logic Diagram; Input and Output Signals; Setting Parameters

83
Current circuit supervision, current based
(CTSU)
Chapter 6
Secondary system supervision
1.4 Logic diagram
Figure 32: Simplified logic diagram for the current circuit supervision
1.5 Input and output signals
Table 93: Input signals for the CTSU (CTSU-) function block
Path in local HMI: ServiceReport/Functions/CTSupervision/FuncOutputs
Table 94: Output signals for the CTSU (CTSU-) function block
1.6 Setting parameters
Path in local HMI: Settings/Functions/Groupn/CTSupervision
Table 95: Setting parameters for the current circuit supervision CTSU (CTSU-) function
∑
1,5 x I
r
∑
+
-
∑
+
+
>1
&
∑
+
-
I>
OPERATION
CTSU-BLOCK
10 ms
100 ms20 ms
CTSU-FAIL
CTSU-ALARM
>1
en03000115.vsd
1 s150 ms
x 0,8
I
L2
I
L3
I
ref
I
L1
Signal Description
BLOCK Block function
Signal Description
FAIL Current circuit failure
ALARM Alarm for current circuit failure
Parameter Range Default Unit Description
Operation Off, On Off - Operating mode for CTSU function
IMinOp 5-100
Step: 1
20 % of I1b Minimum operate phase current