8.5.8
Technical data
M12352-1 v14
Table 100:
LCPTTR/LFPTTR technical data
Function
Range or value
Accuracy
Reference current
(2-400)% of IBase
±1.0% of I
r
Reference temperature
(0-300)°C, (0 - 600)°F
±
1.0°C, ±2.0°F
Operate time:
2
2
2
2
2
ln
p
Trip
Amb
p
ref
ref
I
I
t
T
T
I
I
I
T
t
-
=
-
-
-
×
é
ù
ê
ú
ê
ú
ê
ú
ê
ú
ë
û
EQUATION13000039 V2 EN-US
(Equation 34)
T
Trip
= set operate temperature
T
Amb
= ambient temperature
T
ref
= temperature rise above ambient at I
ref
I
ref
= reference load current
I = actual measured current
I
p
= load current before overload occurs
Time constant
t
= (1–1000)
minutes
IEC 60255-149,
±5.0% or ±200
ms whichever is
greater
Alarm temperature
(0-200)°C, (0-400)°F
±2.0°C, ±4.0°F
Operate temperature
(0-300)°C, (0-600)°F
±2.0°C, ±4.0°F
Reset level temperature
(0-300)°C, (0-600)°F
±2.0°C, ±4.0°F
8.6
Breaker failure protection CCRBRF
IP14514-1 v6
8.6.1
Identification
M14878-1 v5
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Breaker failure protection, 3-phase
activation and output
CCRBRF
3I>BF
SYMBOL-U V1 EN-US
50BF
8.6.2
Functionality
M11550-6 v17
Breaker failure protection (CCRBRF) ensures a fast backup tripping of the
surrounding breakers in case the own breaker fails to open. CCRBRF can be
current-based, contact-based or an adaptive combination of these two conditions.
Section 8
1MRK 505 394-UEN A
Current protection
212
Line differential protection RED650 2.2 IEC
Technical manual
Содержание RED650
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