Upload
steam100deg8229
View
404
Download
14
Embed Size (px)
DESCRIPTION
ELM
Citation preview
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
e
arth
-le
ak
ag
e m
on
ito
rs ty
pe
E
LM
7
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
8
Te
ch
nica
l d
ata
a
nd
d
im
en
sio
ns D
C e
arth
-le
ak
ag
e m
on
ito
rs ty
pe
E
LM