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ABB REF 542plus Technical Reference Manual

ABB REF 542plus
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41
67N Sector Earth fault
directional Sector
(10 thresholds
available)
Direction = Enable (directional behavior)Disable (non
directional behavior)
Start Criteria = neutral current magnitude/ neutral current
basic angle
Io> = 0.002 8.000 In
Uo> = 0.004 0.700 Un
t=30 60 000 ms
Sector Basic Angle = -180.0 +180.0°
Sector Width = 0.0 360.0°
Io> drop off delay = 0 1000 ms
Uo> drop off delay = 0 1000 ms
67N Earth Fault
directional with
free
programmable
characteristic (8
thresholds
available)
Is = 0.050 40.000 x In
t (def) = 0.040 300.000 s
A = 0.005 200.000
P = 0.005 3.000
B = 0.000 50.000 s
Td = 0.050 5.000
Tr = 0.020 100.000 s
Voltage protection functions
59 Overvoltage
instantaneous
U>>> = 0.100 ... 3.000 Un
t = 15 ... 300 000 ms
59 Overvoltage high U>> = 0.100 ... 3.000 Un
t = 40 ... 30 000 ms
59 Overvoltage low U> = 0.100 ... 3.000 Un
t = 40 ... 30 000 ms
27 Undervoltage
instantaneous
U<<< = 0.10 ... 1.20 Un
t = 15 ... 30 000 ms
27 Undervoltage high U<< = 0.10 ... 1.20 Un
t = 40 ... 30 000 ms
27 Undervoltage low U< = 0.10 ... 1.20 Un
t = 40 ... 30 000 ms
25 Synchronism
check
Delta Voltage = 0.02 ... 0.40 Un
Delta Phase = 5 ... 50°
t = 0.20 ... 1000.00 s
59N Residual
overvoltage high
Uo>> = 0.05 ... 3.00 Un
t = 20 ... 300 000 ms
59N Residual
overvoltage low
Uo> = 0.05 ... 3.00 Un
t = 20 ... 300 000 ms
Motor protection functions
49 Thermal overload
protection with
total memory
Nominal Temperature = 50 ... 400 °C (nominal
Temperature at I nom)
Nominal current (IMn) = 0.100 ... 5.000 In (primary value of
the nominal motor current)
Initial Temperature = 10 ... 400 °C
Time Constant at I < 0.1 IMn = 10 ... 100 000 s
Time Constant at 0.1 IMn < I < 2 IMn = 10 ... 20 000 s
Time Constant at I > 2 IMn = 10 ... 20 000 s
Trip Temperature = 50 ... 400 °C
Warning Temperature = 50 ... 400 °C
Environmental Temperature = 10 ... 50 °C
Reset Temperature = 10 400 °C
51MS Motor start IMn = 0.200 ... 2.000 IMn (motor current) (2)
Is = 1.000 ... 20.000 IMn (start value)
t = 40 ... 30 000 ms
I> = 0.200 ... 0.800 Is (motor start)
Multifunction Protection and Switchbay Control
Unit
Technical Reference Manual
REF 542plusREF 542plus
1MRS755859

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ABB REF 542plus Specifications

General IconGeneral
BrandABB
ModelREF 542plus
CategoryControl Unit
LanguageEnglish

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