E-T-A ESX10-TA Manuel - Page 9

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E-T-A ESX10-TA Manuel
Electronic Circuit Protector ESX10-T.-DC 24 V - Installation guidelines and safety instructions
Typical time/current characteristic (T
disconnection
typically 1.1 x I
N
10000
1000
100
10
5
1
0. 1
0.01
0
1
Table 3: Reliable disconnection of the ESX10-T
Reliable disconnection of the ESX10-T at different cable lengths and cable cross sections
Resistivity copper ρ
= 0.0178 (Ohm x mm
0
U
= DC 19.2 V (= 80 % v. 24 V)
B
ESX10-T current rating adjustment I
e. g. trip current I
= 1.25 x I
ab
N
R
in Ohm = (U
/ I
) - 0.050
max
B
ab
cable cross section A in mm
2
➞
distance L in metres (= one-way length)
5
10
15
20
25
30
35
40
45
50
75
100
125
150
175
200
225
250
Example 1:
Example 2:
Example 3:
1822
= 25 °C)
amb
1.8 x I
N
current limitation
typically 1.8 x I
N
4
2
3
...times rated current
2
) / m
Voltage drop on ESX10-T and tolerance of the
shut-off point (typically 1.1 x I
3
(in A) ➞
N
(in A) ➞
3.75
5.07
ESX10-T reliably trips from 0 Ω to the max. circuit resistance R
0.14
1.27
2.54
3.81
5.09
6.36
7.63
8.90
10.17
11.44
12.71
19.07
25.34
31.79
38.14
44.50
50.86
57.21
63.57
max. distance at 1.5 mm
max. distance at 1.5 mm
mixed wiring:
R1 = 40 m in 1.5mm² 2 and R2 = 5 m in 0.25mm² :
(control cabinet - sensor/actuator level) R1 = 0.95 Ohm, R2 = 0.71 Ohm
Total (R1 + R2) = 1.66 Ohm
In a range of 1.1...1.8 x I
l
typically 3 s. (e.g. ESX10-TB-...-6 A)
The electronic current limitation typically begins in at 1.8 x
l
IN. This means: under all overload conditions (independent
of power supply and load circuit resistance)
typically 1.8 times rated current is applied until
disconnection. The corresponding current limitation
value I
depends on the current rating of the device I
Limit
(see table 1) The trip time varies between 100 ms and 3 s
depending on the multiple of the current rating or at short
circuit (I
).
K
Without the current limitation getting into effect at typically
l
1.8 x I
there would be a much higher overcurrent in the
N
event of an overload or short circuit.
5
I
K
=1.05...1.35 x I
N
6
7.5
➞ ESX10-T trips after 3 s
2.51
0.25
0.34
0.5
total cable resistance in Ohm = (R
0.71
0.52
0.36
1.42
1.05
0.71
2.14
1.57
1.07
2.85
2.09
1.42
3.56
2.62
1.78
4.27
3.14
2.14
4.98
3.66
2.49
5.70
4.19
2.85
6.41
4.71
3.20
7.12
5.24
3.56
10.68
7.85
5.34
14.24
10.47
7.12
17.80
13.09
8.90
21.36
15.71
10.68
24.92
18.32
12.46
28.48
20.94
14.24
32.04
23.56
16.02
35.60
26.18
17.80
2
and 3 A ➞ 214 m
2
and 6 A ➞ 106 m
www.e-t-a.de
*1) the trip time is
N
) has already been taken into account.
N
max
0.75
1
1.5
x 2 x L) / A
0
0.24
0.18
0.12
0.47
0.36
0.24
0.71
0.53
0.36
0.95
0.71
0.47
1.19
0.89
0.59
1.42
1.07
0.71
1.66
1.25
0.83
1.90
1.42
0.95
2.14
1.60
1.07
2.37
1.78
1.19
3.56
2.67
1.78
4.75
3.56
2.37
5.93
4.45
2.97
7.12
5.34
3.56
8.31
6.23
4.15
9.49
7.12
4.75
10.68
8.01
5.34
11.87
8.90
5.93
N
4
9