79
Thermal phase overload protection (THOL)
Chapter 5
Current
4.7
Technical data
Table 91:
THOL - Thermal phase overload protection
Table 92:
Thermal overload protection mA input
Function
Setting range
Accuracy
Mode of operation
Off / NonComp / Comp
( Function blocked/No temp. com-
pensation/Temp. comp.)
Base current
IBase
(10 - 200 ) % of I1b in steps of 1 %
±
2.5% of I
r
Temperature rise at IBase
TBase
(0 - 100)
°
C in steps of 1
°
C
±
1
°
C
Time constant
tau
(1 - 62) min in steps of 1 min
±
1 min
Alarm temperature
TAlarm
(50 - 150)
°
C in steps of 1
°
C
Trip temperature
TTrip
(50 - 150)
°
C in steps of 1
°
C
Temp. difference for reset of trip
TdReset
(5 - 30)
°
C in steps of 1
°
C
Function
Setting range
Accuracy
Upper value for mA input
MI11-I_Max
-25.00 - 25.00 mA in steps of 0.01
mA
±
0.5% of set value
Lower value for mA input
MI11-I_Min
-25.00 - 25.00 mA in steps of 0.01
mA
+/- 0.5% of set value
Temp. corresponding to the
MI11-I_Max setting
MI11-MaxValue
-1000 - 1000
°
C in steps of 1
°
C
+/- 1% of set value +/- 1
°
C
Temp. corresponding to the
MI11-I_Min setting
MI11-MinValue
-1000 - 1000
°
C in steps of 1
°
C
+/- 1% of set value +/- 1
°
C
Summary of Contents for REL 551-C1*2.5
Page 1: ...Technical reference manual ProtectIT Line differential protection terminal REL 551 C1 2 5 ...
Page 23: ...14 Introduction to the technical reference manual Chapter 1 Introduction ...
Page 39: ...30 Technical data Chapter 2 General ...
Page 63: ...54 Blocking of signals during test BST Chapter 3 Common functions ...
Page 71: ...62 Line differential protection phase segregated DIFL Chapter 4 Line differential protection ...
Page 89: ...80 Thermal phase overload protection THOL Chapter 5 Current ...
Page 101: ...92 Event function EV Chapter 7 Logic ...
Page 163: ...154 Terminal diagrams Chapter 11 Diagrams Figure 39 REL 551 C1 with DC switch ...