ABB REG650 - Page 45

Table 34. Sensitive directional residual overcurrent and power protection SDEPSDE, continued
Function Range or value Accuracy
Operate time, non-directional
residual overvoltage
45 ms typically at 0.8 to 1.5 x U
set
45 ms typically at 0.8 to 1.5 x U
set
Reset time, non-directional
residual overvoltage
85 ms typically at 1.2 to 0.8 x U
set
85 ms typically at 1.2 to 0.8 x U
set
Operate time, directional
residual over current
140 ms typically at 0.5 to 2 x I
set
-
Reset time, directional
residual over current
85 ms typically at 2 to 0.5 x I
set
-
Critical impulse time non-
directional residual over
current
35 ms typically at 0 to 2 x I
set
-
Impulse margin time non-
directional residual over
current
25 ms typically -
Table 35. 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 (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 = (1–500)
minutes
IEC 60255–8, ±5% + 200 ms
Alarm level 1 and 2 (50–99)% of heat content trip
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
Generator protection REG650
1MRK 502 050-BEN B
Product version: 1.3
ABB 45