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Table 26. Thermal overload protection, one time constant LPTTR
Function
Range or value
Accuracy
Reference current
(0-400)% of
IBase
±
1.0% of I
r
Reference temperature
(0-600)°C
±
1.0°C
Operate time:
2
2
2
2
ln
p
b
I
I
t
I
I
t
æ
ö
-
ç
÷
= ×
ç
÷
-
è
ø
EQUATION1356 V1 EN
(Equation 1)
I = actual measured
current
I
p
= load current before
overload occurs
I
b
= base current, IBase
Time constant
t
= (0–
1000) minutes
IEC 60255-8, class 5 + 200 ms
Alarm temperature
(0-200)°C
±
2.0% of heat content trip
Trip temperature
(0-600)°C
±
2.0% of heat content trip
Reset level temperature
(0-600)°C
±
2.0% of heat content trip
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%
-
Timers
(0.000-60.000) s
±
0.5%
±
10 ms
Operate time for current
detection
35 ms typically
-
Reset time for current
detection
10 ms maximum
-
Bay control REC650
1MRK 511 249-BEN -
Product version: 1.1
Issued: February 2011
56
ABB
Summary of Contents for REC650 ANSI
Page 1: ...Relion 650 series Bay control REC650 Product Guide...
Page 81: ...81...