ABB REC670 Product Manual page 50

Bay control REC670
Pre-configured
Product version: 1.1
Table 32. Thermal overload protection, two time constants TRPTTR
Function
Base current 1 and 2
Operate time:
æ ö
2 2
-
I I
p
ç ÷
= × t
t ln
ç ÷
2 2
-
I I
è ø
b
(Equation 2)
EQUATION1356 V1 EN
I = I
measured
Alarm level 1 and 2
Operate current
Reset level temperature
Table 33. Breaker failure protection CCRBRF
Function
Operate phase current
Reset ratio, phase current
Operate residual current
Reset ratio, residual current
Phase current level for
blocking of contact function
Reset ratio
Timers
Operate time for current
detection
Reset time for current
detection
50
Range or value
(30–250)% of IBase
I = load current before
p
overload occurs
Time constant τ = (1–500)
minutes
(50–99)% of heat content
trip value
(50–250)% of IBase
(10–95)% of heat content
trip
Range or value
(5-200)% of lBase
> 95%
(2-200)% of lBase
> 95%
(5-200)% of lBase
> 95%
(0.000-60.000) s
10 ms typically
15 ms maximum
1MRK 511 192-BEN B
Issued: June 2010
Accuracy
± 1.0% of I
r
IEC 60255–8, class 5 + 200 ms
± 2.0% of heat content trip
± 1.0% of I
r
± 2.0% of heat content trip
Accuracy
± 1.0% of I at I £ I
r
± 1.0% of I at I > I
-
± 1.0% of I at I £ I
r
± 1.0% of I at I > I
-
± 1.0% of I at I £ I
r
± 1.0% of I at I > I
-
± 0.5% ± 10 ms
-
-
r
r
r
r
r
r
ABB