Technical Data; Breaker Failure Protection 3-Phase Activation And Output Ccrbrf; Identification; Functionality - ABB RET650 Technical Manual

1MRK 504 135-UEN A
8.5.8
8.6
8.6.1
8.6.2
Technical manual

Technical data

Table 96: TRPTTR technical data
Function
Base current 1 and 2
Operate time:
æ 2 2 ö
-
I I
p
t ç ÷
= ×
t ln
ç ÷
2 2
-
I I
è ø
ref
(Equation 56)
EQUATION1356 V2 EN
I = actual measured current
Ip = load current before overload
occurs
Iref = reference load current
Alarm level 1 and 2
Operate current
Reset level temperature
Breaker failure protection 3-phase activation and
output CCRBRF

Identification

Function description
Breaker failure protection, 3-phase
activation and output

Functionality

CCRBRF can be current based, contact based, or an adaptive combination of these two
conditions.
Breaker failure protection, 3-phase activation and output (CCRBRF) ensures fast
back-up tripping of 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.
Current check with extremely short reset time is used as check criterion to achieve
high security against inadvertent operation.
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
Section 8
Current protection
Accuracy
± 1.0% of I
r
IEC 60255–8, ±5% + 200 ms
± 2.0% of heat content trip
± 1.0% of I
r
± 2.0% of heat content trip
ANSI/IEEE C37.2
device number
50BF
3I>BF
179