Table 38. 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 x U
set
to 1.5 x U
set
45 ms typically at 0.8 x U
set
to 1.5 x U
set
Reset time, non-directional residual
overvoltage
85 ms typically at 1.2 x U
set
to 0.8 x U
set
85 ms typically at 1.2 x U
set
to 0.8 x U
set
Operate time, directional residual over
current
140 ms typically at 0.5 x I
set
to 2 x I
set
-
Reset time, directional residual over
current
85 ms typically at 2 x I
set
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
-
M12352-1 v15
Table 39. Thermal overload protection, one time constant LCPTTR/LFPTTR
Function
Range or value
Accuracy
Reference current
(0-400)% of IBase
±1.0% of I
r
Reference temperature
(0-300)°C, (0 - 600)°F
±
2.0°C, ±2.0°F
Operate time:
2
2
2
2
ln
p
Trip
Amb
ref
ref
I
I
t
T
T
I
I
T
σ
,
<
,
,
√
EQUATION13000039 V3 EN-US
(Equation 1)
T
Trip
= set operate temperature
T
Amb
= ambient temperature
T
ref
= temperature rise above ambient at I
ref
I
ref
= reference load current
I = actual measured current
I
p
= load current before overload occurs
Time constant
t
= (1–1000)
minutes
IEC 60255-149, ±5.0% or ±200 ms whichever is greater
Alarm temperature
(0-200)°C, (0-400)°F
±
2.0°C
±
2.0°F
Operate temperature
(0-300)°C, (0-600)°F
±
2.0°C
±
2.0°F
Reset level temperature
(0-300)°C, (0-600)°F
±
2.0°C
±
2.0°F
Line distance protection REL650
1MRK 506 384-BEN H
Version 2.2
62
Hitachi Power Grids
© 2017 - 2021 Hitachi Power Grids. All rights reserved
Содержание REL650 series
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