![ABB REB650 2.1 IEC Product Manual Download Page 35](http://html.mh-extra.com/html/abb/reb650-2-1-iec/reb650-2-1-iec_product-manual_4774035.webp)
M13266-2 v8
Table 26. Thermal overload protection, two time constants TRPTTR
Function
Range or value
Accuracy
Base current 1 and 2
(30–250)% of
IBase
±1.0% of I
r
Operate time:
2
2
2
2
p
ref
I
I
t
ln
I
I
t
æ
ö
-
ç
÷
= ×
ç
÷
-
è
ø
EQUATION1356 V2 EN-US
(Equation 1)
I = actual measured current
Ip = load current before overload
occurs
Iref = reference load current
I
p
= load current before overload
occurs
Time constant τ = (0.10–500.00)
minutes
±5.0% or ±200 ms whichever is greater
Alarm level 1 and 2
(50–99)% of heat content
operate value
±2.0% of heat content trip
Operate current
(50–250)% of
IBase
±1.0% of I
r
Reset level temperature
(10–95)% of heat content trip
±2.0% of heat content trip
M12353-1 v12
Table 27. Breaker failure protection CCRBRF
Function
Range or value
Accuracy
Operate phase current
(5-200)% of
lBase
±1.0% of I
r
at I
£
I
r
±1.0% of I at I > I
r
Reset ratio, phase current
> 95%
-
Operate residual current
(2-200)% of
lBase
±1.0% of I
r
at I
£
I
r
±1.0% of I at I > I
r
Reset ratio, residual current
> 95%
-
Phase current level for blocking of contact function
(5-200)% of
lBase
±1.0% of I
r
at I
£
I
r
±1.0% of I at I > I
r
Reset ratio
> 95%
-
Operate time for current detection
10 ms typically
-
Reset time for current detection
15 ms maximum
-
Time delay for re-trip at 0 to 2 x I
set
(0.000-60.000) s
±0.2% or ±15 ms whichever is
greater
Time delay for back-up trip at 0 to 2 x I
set
(0.000-60.000) s
±0.2% or ±15 ms whichever is
greater
Time delay for back-up trip at multi-phase start at 0 to 2 x I
set
(0.000-60.000) s
±0.2% or ±20 ms whichever is
greater
Additional time delay for a second back-up trip at 0 to 2 x I
set
(0.000-60.000) s
±0.2% or ±20 ms whichever is
greater
Time delay for alarm for faulty circuit breaker
(0.000-60.000) s
±0.2% or ±15 ms whichever is
greater
1MRK 505 362-BEN B
Busbar protection REB650 2.1 IEC
Product version: 2.1
ABB
35