ABB REG670 Product Manual page 74

Generator protection REG670 2.2 and Injection equipment REX060,
REX061, REX062
Product version: 2.2.1
Table 58. Thermal overload protection, two time constants TRPTTR
Function
Base current 1 and 2
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-US
I = actual measured current
Ip = load current before overload
occurs
Iref = reference load current
Alarm level 1 and 2
Operate current
Reset level temperature
Table 59. 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
Operate time for current detection
Reset time for current detection
Time delay for re-trip at 0 to 2 x I
Time delay for back-up trip at 0 to 2 x I
Time delay for back-up trip at multi-phase start at
0 to 2 x I
set
Additional time delay for a second back-up trip at
0 to 2 x I
set
Time delay for alarm for faulty circuit breaker
74
Range or value
(30–250)% of IBase
I = load current before overload
p
occurs
Time constant τ = (0.10–500.00)
minutes
(50–99)% of heat content
operate value
(50–250)% of IBase
(10–95)% of heat content trip
Range or value
(5-200)% of
> 95%
(2-200)% of
> 95%
(5-200)% of
> 95%
10 ms typically
15 ms maximum
(0.000-60.000) s
set
(0.000-60.000) s
set
(0.000-60.000) s
(0.000-60.000) s
(0.000-60.000) s
M13266-2 v8
Accuracy
±1.0% of I
r
±5.0% or ±200 ms whichever is greater
±2.0% of heat content trip
±1.0% of I
r
±2.0% of heat content trip
M12353-1 v14
Accuracy
lBase
±1.0% of I at I £ I
r
±1.0% of I at I > I
-
lBase
±1.0% of I at I £ I
r
±1.0% of I at I > I
-
lBase
±1.0% of I at I £ I
r
±1.0% of I at I > I
-
-
-
±0.2% or ±15 ms whichever is greater
±0.2% or ±15 ms whichever is greater
±0.2% or ±20 ms whichever is greater
±0.2% or ±20 ms whichever is greater
±0.2% or ±15 ms whichever is greater
1MRK 502 074-BEN A
r
r
r
r
r
r
ABB