Subaru impreza 2017 - Page 154

6.6.8 Technical data
M12352-1 v14
Table 77: 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 19)
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
6.7 Breaker failure protection CCRBRF
IP14514-1 v6
6.7.1 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
6.7.2 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 6 1MRK 505 384-UEN A
Current protection
148 Breaker protection REQ650 2.2 IEC
Technical manual