ABB REF 542plus, Product Manual

Feeder Terminal

REF 542plus

1MRS756269

Technical data (cont´d)

13

67

Overcurrent directional high

I>> = 0.050 - 40.000 x I

n

t = 40 - 30 000 ms
Direction = backward, forward

67

Overcurrent directional low

I>> = 0.050 - 40.000 x I

n

t = 40 - 30 000 ms
Direction = backward, forward

Earth fault (1)

51N

Earth-fault high

I

0

>> = 0.050 - 40.000 x I

n

t = 40 - 30 000 ms

51N

Earth-fault low

I

0

> = 0.050 - 40.000 x I

n

t = 40 - 30 000 ms

51N IDMT

Earth-fault IDMT

Inverse time characteristics: Normal, Very, Extreme or 
Long-time inverse
I

e

 = 0.05 - 40.00 x I

n

K = 0.05 - 1.5

67N

Earth-fault directional, high

I

0

>> = 0.050 - 40.000 x I

n

t = 40 - 30 000 ms
U

0

 = 0.02 - 0.70 x U

n

Direction = forward, backward
Net type = isolated (sin 

ϕ

), earthed (cos 

ϕ

)

67N

Earth-fault directional, low

I

0

> = 0.050 - 40.000 x I

n

t = 40 - 30 000 ms
U

0

 = 0.02 - 0.70 x U

n

Direction = forward, backward
Net type = isolated (sin 

ϕ

), earthed (cos 

ϕ

)

67S

Earth-fault directional, sensitive

I

0

 = 0.050 - 2.000 x I

n

t = 100 - 10 000 ms
Angle alpha = 0.0 - 20.0

o

Angle delta = -180.0

o

 - +180.0

o

U

0

 = 0.05 - 0.70 x U

n

67N Sector

Earth-fault directional, sector 
(10 thresholds available)

Direction = enable/disable directional behavior
Start criteria = neutral current magnitude/

neutral current basic angle

I

0

 = 0.002 - 8.000 x I

n

U

0

 = 0.004 - 0.700x U

n

t = 30 - 60 000 ms
Sector basic angle = -180.0

o

 - +180.0

o

Sector width = 0.0 - 360.0

o

I

0

 drop off delay = 0 - 1.000 ms

U

0

 drop off delay = 0 - 1.000 ms

Voltage protective functions

59

Overvoltage, instantaneous

U>>> = 0.100 - 3.000 U

n

t = 15 - 300 000 ms

59

Overvoltage, high

U>> = 0.100 - 3.000 U

n

t = 40 - 30 000 ms

59

Overvoltage, low

U> = 0.100 - 3.000 U

n

t = 40 - 30 000 ms

27

Undervoltage, instantaneous

U<<< = 0.10 - 1.20 U

n

t = 15 - 30 000 ms

27

Undervoltage,high

U<< = 0.10 ... 1.20 U

n

t = 40 - 30 000 ms

27

Undervoltage, low

U< = 0.10 - 1.20 U

n

t = 40 - 30 000 ms

25

Synchronism check

Delta Voltage = 0.02 - 0.40 U

n

Delta phase = 5 - 50°
Time = 0.20 - 1000.00 s

59N

Residual overvoltage, high

U

NE

> = 0.05 - 3.00 U

n

t = 20 - 300 000 ms

59N

Residual overvoltage, low

U

NE

> = 0.05 - 3.00 U

n

t = 20 - 300 000 ms

Table 6: ANSI code protection functions and parameters