Technical Data - ABB REG650 Technical Manual

Section 8
Current protection
8.4.8
8.5
8.5.1
8.5.2
214

Technical data

Table 90: TRPTTR (49) technical data
Function
Base current 1 and 2
Operate time:
æ ö
2 2
-
I I
p
t ç ÷
= ×
t ln
ç ÷
2 2
-
I I
è ø
b
(Equation 57)
EQUATION1356 V1 EN
I = I
measured
Alarm pickup 1 and 2
Operate current
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.
Breaker failure protection (CCRBRF, 50BF) ensures fast back-up tripping of
surrounding breakers in case the protected breaker fails to open. CCRBRF (50BF) can
be current based, contact based, or an adaptive combination of these two conditions.
Range or value
IBase
(30–250)% of
I = load current before overload
p
occurs
Time constant τ = (1–500)
minutes
(50–99)% of heat content trip
value
(50–250)% of IBase
(10–95)% of heat content trip
IEC 61850 IEC 60617
identification identification
CCRBRF
SYMBOL-U V1 EN
1MRK 502 043-UUS B
Accuracy
± 1.0% of I
n
IEC 60255–8, ±5% + 200 ms
± 2.0% of heat content trip
± 1.0% of I
n
± 2.0% of heat content trip
ANSI/IEEE C37.2
device number
50BF
3I>BF
Technical Manual