State Transition Diagram For Cold Load Protection; Scheme Logic For Cold Load Protection - Toshiba GRE110 Instruction Manual

Overcurrent protection relay
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STATE 0
CB status: Closed
Settings: Normal
Monitor CB status
CB opens
CB closes
within
T CLE time
STATE 1
CB status: Open
Settings: Normal
Run T CLE timer
Monitor CB status
T CLE timer
expires
STATE 2
CB status: Open
Settings: Cold Load
Monitor CB status
Figure 2.9.3 State Transition Diagram for Cold Load Protection
CB CLOSE
CB OPEN
146
STATE 0
147
STATE 1
148
STATE 2
149
STATE 3
85
A
≥1
86
ICLDO
B
87
C
[CLDOEN]
+
"ON"
Figure 2.9.4 Scheme Logic for Cold Load Protection
T CLR timer
expires
CB closes
CB opens
within
CLR time
&
TCLE
0
t
&
0 - 10000s
&
&
&
TCLR
0
t
&
0 - 10000s
TCLDO
t
&
0.00 - 100.00s
1
 48 
6 F 2 T 0 1 7 2
I
<ICLDO for
L
T CLDO time
STATE 3
CB status: Closed
Settings: Cold Load
Run T CLR timer
Monitor CB status
Monitor load current I
L
Change to
STATE 1
Change to
≥1
STATE 2
Change to
≥1
STATE 0
Change to
STATE 3
0

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