Siemens SIPROTEC 7SJ62 Instruction Manual page 441

Time Trip Charac-
teristics As Per
IEC 60255–3
Trip Time Charac-
teristics As Per
ANSI
Tolerances
7SJ62 Manual
C53000-G1140-C121-1
See also Figure10-4
,(& 1250$/ ,19(56(
,(& 9(5< ,19(56(
,(& (;75(0(/< ,19(56(
) ≤ 20
/
for 1.1 < (I I
2 2p
See Also Figure10-5
$16, ,19(56(
$16, 02'(5$7(/<
,19(56(
$16, 9(5< ,19(56(
$16, (;75(0(/<
,19(56(
) ≤ 20
/
for 1.1 < (I
I
2 2p
≥ 20 are identical to those for I
The trip times for I /I
2 2p
Pickup Threshold
Pickup Current I
2p
Time for 2 ≤ I ≤ 20
/I
2 2p
1
) For I = 1 A, divide all limits and increments by 5.
N
0.14
⋅
t = --------------------------------------- - T
I2p
0.02
( ⁄ )
I I – 1
2 2p
13.5
⋅
t --------------------------------- T
=
I2p
1
( ⁄ )
1
I I –
2 2p
80
⋅
t --------------------------------- T
=
I2p
2
( ⁄ )
1
I I –
2 2p
Where:
t trip time in seconds
T setting value of the time multiplier
I2p
I negative sequence currents
2
setting value of the pickup current
I
2p

8.9341

t = --------------------------------------------- +
 2.0938
( ⁄ )
1
I I –
2 2p

0.0103

t 0.0228
= --------------------------------------- - +
 0.02
( ⁄ )
1
I I –
2 2p

3.922

t = --------------------------------- + 0.0982

2
( ⁄ )
I I – 1
2 2p

5.64

t 0.02434
= --------------------------------- +
 2
( ⁄ )
1
I I –
2 2p
Where:
t trip time in seconds
D setting value of the time multiplier
I2p
negative sequence currents
I
2
I setting value of the pickup current
2p
/I = 20.
2 2p
approx. 1.10 · I
2p
3% of set value or 50 mA
5% of reference (calculated) value + 2 %
current tolerance, or 30 ms
Technical Data
[s]
[s]
[s]

⋅

0.17966 D
[s]
I2p


⋅

D
[s]
I2p


⋅

D [s]
I2p


⋅

D
[s]
I2p

10-23