Datasheet

Electronic monitoring relays PMDsrange
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]
Phase sequence monitoring
S1PN
NSG-D-2-029-2009-09
Altdaten CMT
The S1PN phase sequence monitoring
relay detects the phase field of a 3-
phase supply.
Approvals
Zulassungen
UL approval only for unit types up to
240 VAC
Unit features
Altdaten CMT
` Measuring voltage up to 690 VAC
` Phase sequence monitoring
` Phase failure monitoring
` Fuse monitoring
` LEDs
` Extensive voltage range
The phase sequence monitoring relay
is enclosed in an S-95 slimline hous-
ing. Three versions are available.
Features:
` Relay outputs: 2 auxiliary contacts
(C/O)
` Phase field direction monitor
` Detects fuse defect and phase fail-
ure, provided there is no voltage
feedback from connected motors
` LEDs for fault and supply voltage
The phase sequence monitoring relay
detects the time sequence of the indi-
vidual phases in a three phase supply.
In a clockwise phase sequence, con-
tacts 11-12 and 21-22 are open, con-
tacts 11-14 and 21-24 are closed. In
an anti-clockwise phase sequence,
contacts 11-14 and 21-24 are open,
contacts 11-12 and 21-22 are closed.
The S1PN can safely detect phase fail-
ure when the plant is at a standstill
(load isolated from the measuring in-
puts).
Internal wiring diagram
S1PN


L3
12 14
11
K1
~
=
L1
L3
L2
Power Fault
22 24
21
L2
L1