ABB REL650 Product Manual page 54

Line distance protection REL650 ANSI
Product version: 1.3
Table 39. Thermal overload protection, one time constant LFPTTR/LCPTTR (26)
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 1)
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
Table 40. Breaker failure protection, 3-phase activation and output CCRBRF (50BF)
Function
Operate phase current
Reset ratio, phase current
Operate residual current
Reset ratio, residual current
Phase current pickup for blocking of contact function
Reset ratio
Timers
Operate time for current detection
Reset time for current detection
54
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
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
Range or value
lBase
(5-200)% of
> 95%
(2-200)% of lBase
> 95%
lBase
(5-200)% of
> 95%
(0.000-60.000) s
20 ms typically
10 ms maximum
1MRK 506 337-BUS B
Accuracy
± 1.0% of I at I £ I
n n
± 1.0% of I at I > I
n
-
± 1.0% of I at I £ I
n n
± 1.0% of I at I > I
n
-
± 1.0% of I at I £ I
n n
± 1.0% of I at I > I
n
-
± 0.5% ±10 ms
-
-
ABB