Technical Data - ABB REC650 ANSI Technical Manual

Section 6
Current protection
6.6.8
6.7
6.7.1
6.7.2
136

Technical data

Table 65: LFPTTR/LCPTTR (26)technical data
Function
Reference current
Reference temperature
Operate time:
æ 2 2 ö
-
I I
p
ç ÷
t
= ×
t ln
ç ÷
2 2
-
I I
è ø
ref
(Equation 20)
EQUATION1356 V2 EN
I = actual measured current
I = load current before overload
p
occurs
I = reference load current
ref
Alarm temperature
Trip temperature
Reset level temperature
Breaker failure protection 3-phase activation and output
CCRBRF (50BF)
Identification
Function description
Breaker failure protection, 3-phase
activation and output
Functionality
CCRBRF (50BF) can be current based, contact based, or an adaptive combination of these
two conditions.
Range or value
IBase
(0-400)% of
(0-600) °F, (0 - 300)°C
Time constant t = (0–1000) minutes
(0-400)°F, (0-200)°C
(0--600)°F, (0-300)°C
(0-600)°F, (0-300)°C
IEC 61850 IEC 60617
identification identification
CCRBRF
SYMBOL-U V1 EN
1MRK 511 287-UUS A
Accuracy
± 1.0% of I
n
± 2.0°F, ±2.0°C
IEC 60255-8, ±5% + 200 ms
± 2.0°C
± 2.0°F
± 2.0°C
± 2.0°F
± 2.0°C
± 2.0°F
ANSI/IEEE C37.2
device number
50BF
3I>BF
Technical manual