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121
DPX
®
125
026002-34795u.eps
In 3 A
In 1 A
In 0 . 3 A
b
a
0 . 01
0 . 01
0 . 02
0 . 05
0 . 1
0 . 2
0 . 5
1
2
t (s)
5
10
0 . 05 0 . 1 0 . 5 1
5 10 50 100 300
I (A)
In 0 . 03 A
025049-34794u.eps
Icc (A)
10
10
10
9
10
8
10
7
10
6
10
5
10
4
10
3
10
2
10
1
I
2
t
(A
2
s
)
10
0
10
1
10
2
10
3
10
4
10
5
16
25
40
63
100
125
n
Current limitation curves
10000
1000
100
10
1
0 . 01
0 . 001
0 . 1
t(s)
1
3 2
4 5 10 20 30 50 100
I/In
1
2
125 A
100 A
63 A
40 A
25 A
16 A
025604-34792u.eps
025049-34793u.eps
0 . 9
0 . 8
0 . 7
0 . 3
0 . 25
0 . 2
Icc (kA)
10
0
10
0
10
1
10
2
10
3
2 3 4 5
2 3 4 5
10
1
10
2
2
3
4
5
2
3
4
5
2
3
4
5
IP (kA)
DPX125 25 kA
DPX125 36 kA
100 - 125 A
40 - 63 A
16 A - 25 A
0 . 5
1
2
n
Thermal stress limitation curves
n
Differential tripping curves
at ambient
θ
= 40 °C
I = actual current
Ir = max. adjustment current of thermal release
➀
= thermal release zone when cold
➁
= thermal release zone when hot (in steady state)
Icc = prospective short-circuit symmetrical current
(rms values in A)
I
2
t = limited thermal stress (in A
2
s)
I
∆
(A) = earth leakage current
I
∆
n = nominal earth leakage current
a = instantaneous tripping point
b = 3 possible delay settings (0·3, 1 and 3 seconds)
Icc = prospective short-circuit symmetrical current
(rms values in kA)
IP = maximum peak value (kA)
➀
= current, max. peak, short-circuit rms
➁
= current, unlimited peak (max.), corresponding to power factors shown above (0·15 to 0·9)
Fixed magnetic threshold (Im) (A)
(1)
for DPX 125
In (A)
16
25
40
63
100
125
Phase
480
625
800
950
1250
1 250
N
480
625
800
950
950
950
n
Tripping curves
Nominal breaking capacity (kA) (BS EN 60947-2)
DPX 125 25 kA DPX 125 36 kA
Ue
Icu (kA) Ics (%Icu)
Icu (kA) Ics (%Icu)
400 V
±
25 50
36 75
230 V
±
35 50
40 75
n
Electrical characteristics
Nominal current (In) at 40 °C (A) for DPX 125
In (A)
16
25
40
63
100
125
Phase
16
25
40
63
100
125
N
16
25
40
63
100
125
N/2
–
–
–
–
63
63
Maximum nominal operating function
500 V
±
- 250 V
=
Nominal frequency
50/60 Hz
Category of use
A
Thermal adjustment
0·7 to 1 In
Maximum permitted cross sections
stranded cables : 70 mm
2
for integral cage terminals
flexible cables : 50 mm
2
copper bar (width) : 12 mm
(1) Trip current for 50/60 Hz
For direct current, multiply by 1·5