ABB REC650 ANSI - Technical Data

6.6.8 Technical data
Table 65: LFPTTR/LCPTTR (26)technical data
Function
Range or value Accuracy
Reference current (0-400)% of IBase
± 1.0% of I
n
Reference temperature (0-600) °F, (0 - 300)°C
± 2.0°F, ±2.0°C
Operate time:
2 2
2 2
p
ref
I I
t ln
I I
t
æ ö
-
ç ÷
= ×
ç ÷
-
è ø
EQUATION1356 V2 EN (Equation 20)
I = actual measured current
I
p
= load current before overload
occurs
I
ref
= reference load current
Time constant t = (0–1000) minutes
IEC 60255-8, ±5% + 200 ms
Alarm temperature (0-400)°F, (0-200)°C
± 2.0°C
± 2.0°F
Trip temperature (0--600)°F, (0-300)°C
± 2.0°C
± 2.0°F
Reset level temperature (0-600)°F, (0-300)°C
± 2.0°C
± 2.0°F
6.7 Breaker failure protection 3-phase activation and output
CCRBRF (50BF)
6.7.1 Identification
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
50BF
6.7.2 Functionality
CCRBRF (50BF) can be current based, contact based, or an adaptive combination of these
two conditions.
Section 6 1MRK 511 287-UUS A
Current protection
136
Technical manual