Datasheet

Electronic monitoring relays PMDsrange
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]
Insulation monitoring
S1EN
NSG-D-2-127-2009-09
Altdaten CMT
The S1EN insulation monitoring relay
provides protection against insulation
faults in galvanically isolated voltage
supplies (IT systems). It meets the re-
quirements of DIN EN 61557-8.
Approvals
Zulassungen
Unit features
Altdaten CMT
` For DC and AC supplies
` Normally energised mode
` Fault latching or automatic reset
` Normal/test mode
` External reset button can be con-
nected
Description
The insulation monitoring relay is en-
closed in an S-95, slimline housing. 2
versions are available, with measuring
ranges of 50 kΩ and 200 kΩ. Its univer-
sal power supply operates with all
supply voltages.
Features:
` Relay outputs: 1 auxiliary contact
(C/O)
` Two insulation measuring circuits
` Detects symmetrical insulation
faults
` Switch for function testing
` LED for supply voltage and fault
The unit measures the insulation re-
sistance between the phases and the
operating earth on galvanically isolat-
ed voltage supplies. If the insulation
resistance in either of the two measur-
ing circuits drops below the response
value R
on
, the auxiliary contact switch-
es and the “Fault” LED is lit. If the re-
lease value R
off
is then exceeded, the
device is ready for operation immedi-
ately if automatic reset is selected; if
manual reset is selected, it is neces-
sary to operate an external button or
the MR/AR switch.
Internal wiring diagram
Key
` U
N
: Mains voltage
` R
on
: Response value
` U
B
at B3-A2: 24 VAC/DC
` U
B
at A1-A2: 42-240 VAC/DC
S1EN


Y1 Y2
A2
A1
K1
B1 B2
ResetU
N
24 V DC
AC/DC:
24 ... 240 V
Normal:
Test:
MR:
AR:
12
14
11
G
R
an
R
E
£ R
an
U
B
B3
speichernd/nicht speichernd
lätching/non latching
mémorisation/sans mémorisation
acumuladora/no acumuladora
con/senza memorizzazione
handmatig/automatische reset
Auswertung
Evaluation
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