LS Industrial Systems Susol Series - Long- Time Delay Relays; Relay Function

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Technical catalog for Susol & Metasol ACB
Technical catalog for Susol & Metasol ACB
D
D
4. Relay Function
Long- Time Delay Relays
Long-Time
Delay(L)
Short-Time
Delay(S)
Instantane
ous(I)
Ground
Fault
Maximum time delay(sec)
Accuracy:15% or below 100ms
Continuous Thermal Memory Time
Current Setting(A)
Accuracy:10% or below 50ms
Maximum time delay(s)
@ 10 Ir
Current Setting(A)
Tripping time
Current Setting(A)
Accuracy:10%(Ig0.4In)
20% (Ig0.4In) or below 50ms
Maximum time delay(s)
@ 1 In
tr @ (1.5 Ir)
tr @ (6.0 Ir)
tr @ (7.2 Ir)
Isd= Ir ...
Tsd
Ii= In ...
Ig= In ...
tg
12.5
0.5
0.34
1.5
0.05
20
80
2
0.2
0.05
20
80
25
1
0.69
2
0.1
0.1
80
140
3
0.3
0.1
0.1
80
140
50
2
1.38
3
0.2
0.2
160
240
4
0.4
0.2
0.2
160
240
100
4
2.7
4
0.3
0.3
260
340
6
0.5
0.3
0.3
260
340
200
8
5.5
5
0.4
0.4
360
440
8
0.6
0.4
0.4
360
440
300
12
8.3
6
10
0.7
400
16
11
8
12
0.8
500
20
13.8
10
15
1.0
off
off
off
off
off
off
I2T off
I2T on
Min. Trip
Time(ms)
Max. Trip
Time(ms)
I2t off
I2t on
Min. Trip
Time(ms)
Max. Trip
Time(ms)
Current Setting(A) (1.15
××
Ir)
Ir = In
××
...
0.4 0.5 0.6 0.7
0.8
0.9
1.0
below 50ms
1. Long- Time Delay
The function for overload protection which has time delayed
characteristic in inverse ratio to fault current. (T = I^2 / K).
1) Standard current setting Knob-Ir
�Setting range : (0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0)
In
2) Time delay setting Knob-Tr
�Standard operating time is based on the time of 6lr.
�Setting range : 0.5/ 1/ 2/ 4/ 8/ 12/ 16/ 20/ Off sec (9 modes)
3) Relay starting current
�When current over (1.15) Ir flows in, relay is picked up.
4) Long-Time Delay Operating Characteristic Formula
�T =       
T = Operating time [ ms ]  = 29250*Tr
I = Overload rate Ip = Load rate before Overload
K = 1.10(Service Factor)
5) Relay operates basing on the largest load current
among R/S/T/N Phase.
6) Rated current can be adjustable by Fine Adjustment
Note1)
Note1) Fine Adjustment
The function for adjusting relay operating current much more
detailed than the value of knob
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