DC earth leakage monitors

ELM 25 and ELM 125

For earth leakage protection in d.c. distribution systems

25 A, sensitivity 5 or 20 mA

125 A, sensitivity 20 or 100 mA

The ELM principle of operation is based on current balance monitoring

of the conductors in a DC system. The monitor reacts on the residual

magnetic field that is formed when an earth fault occurs, and a differential

current is produced.

see page 8

see page 8

dimensions

techn. data

Characteristics

Rapid fault location by earth leakage detection in every outgoing group;

LED fault signalling;

High detection sensitivity;

Low power consumption;

Manual or automatic reset;

Small dimensions.

Earth leakage monitors type ELM 25

I

I

n

I

U

e

I

I

I

type

I

packing

I

Holec no.

I

ref. no.

quantity

25 A 24 - 48 V 5 mA ELM 25 1 1341 033 21285 5

25 A 24 - 48 V 20 mA ELM 25 1 1341 034 29285 7

25 A 110 - 220 V 5 mA ELM 25 1 1341 035 38285 5

25 A 110 - 220 V 20 mA ELM 25 1 1341 036 62285 2

Earth leakage monitors type ELM 125

125 A 24 - 48 V 20 mA ELM 125 1 1341 037 50285 7

125 A 24 - 48 V 100 mA ELM 125 1 1341 038 71285 0

125 A 110 - 220 V 20 mA ELM 125 1 1341 039 77285 4

125 A 110 - 220 V 100 mA ELM 125 1 1341 040 85285 3

DC

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Technical data and dimensions

DC earth-leakage monitors

ELM 25 ELM 125

U

n

24 - 48 V / 110 - 220 V max. 500 V

- 24 - 48 V / 110 - 220 V

I

n

25 A 125 A

5 mA or 20 mA 20 mA or 100 mA

+ 30% Un - 15% U

n

+ 30% Un - 15% U

n

< 2.5 W < 2.5 W

25 C to +50 C 25 C to +50 C

40 C to +80 C 40 C to +80 C

5 x U

n

during 10 ms 5 x U

n

during 10 ms

380 V~, 8 A 380 V~, 8 A

250 V , 0.4 A 250 V , 0.4 A

24 V , 8 A 24 V , 8 A

EN 50081-2 and EN 50082-2 EN 50081-2 and EN 50082-2

LED LED

manual

*)

manual

*)

suitable for top hat rail suitable for top hat rail

2.5 mm

2

direct; throughgoing cables, max. 2 x 35 mm

2

,

6 mm

2

via Burndy clamps auxiliaries 2.5 mm

2

*) To be changed to automatic reset by means of switch on PCB.

Principal diagram ELM

Dimensions (mm)

type:

system d.c. voltage:

auxiliary voltage:

rated current:

earth-leakage current:

voltage tolerance:

power consumption:

ambient temperature:

storage temperature:

overvoltage:

auxiliary contact (1 changeover):

Electromagnetic Compatibility:

signalling:

reset:

mounting:

connecting capacity:

load loadaux. voltage

70

11735

45

3.5

55

5.5

109

71

60

91

111

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