Protection Relays
Voltage Monitoring Relays
PLS SERIES
Description
The PLS Series is a low cost phase sensitive control that
provides an isolated contact closure when the proper A-B-C
phase sequence is applied. Protects sensitive 3-phase
equipment and equipment operators from reverse rotation.
Designed to be compatible with motor overloads or other
3-phase equipment protection devices. Protection for equipment
control centers where frequent reconnection or electrical code
makes reverse rotation protection essential. Examples include:
mobile refrigerated containers, construction equipment, hoists,
pumps, conveyors, elevators and escalators.
Operation
The internal relay and LED are energized when the phase
sequence is correct. The output relay will not energize if the
phases are reversed. Reset is automatic upon correction of
the fault.
8-PIN
Wiring Diagram
F = Fuses
ØA = Phase A = L1
ØB = Phase B = L2
ØC = Phase C = L3
NO = Normally Open
NC = Normally Closed
Relay contacts are isolated
2A fast acting fuses recommended for
safety (not required).
Features & Benefits
FEATURES
Continuous monitoring
Universal motor
compatibility
Industry standard 8-pin
octal plug connection
Factory calibrated
LED indicator
BENEFITS
Cost effective protection of 3-phase equipment and
operators from reverse rotation. Meets reverse
rotation protection code requirements.
Designed to be compatible with motor overloads or
other 3-phase equipment protection devices
Eliminates need for special connectors
Easy to install. No field adjustment needed
Provides visual indication of relay status
Accessories
BZ1 Front Panel Mount Kit
Provides an easy method of through-the-panel
mounting of 8- or 11-pin plug-in timers, flashers,
and other controls.
Octal 8-pin Socket
8-pin 35mm DIN rail or surface mount. Rated at
10A @ 6 00VAC. Surface mounted with two #6
screws or snaps onto a 35 mm DIN rail.
Ordering Information
MODEL
LINE VOLTAGE
PLS120A
PLS240A
PLS480A
120VAC
208/240VAC
440/480VAC
LPSM003ZXID (Indicating),
LPSM003Z (Non-indicating) Fuse Holders
Littelfuse POWR-SAFE Dead Front holders
provide optimum protection to personnel for
Class CC and Midget-Style fuses. 600 VAC/DC
0KLK002.T Midget Fuse (2 Amp)
10 x 38 fast acting, high-interrupting capacity,
current-limiting type fuse. 600 Vac/500 Vdc
C103PM (AL) DIN Rail
35 mm aluminum DIN rail available in a 36 in.
(91.4 cm) length.
If you don’t find the part you need, call us for a custom product 800-843-8848
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/pls
www.littelfuse.com/
Rev: 1-A-062716
Protection Relays
Voltage Monitoring Relays
PLS SERIES
Specifications
Line Voltage
Type
3-phase delta or wye with no connection
to neutral
Nominal
Minimum
Maximum
Voltage
Voltage
Voltage
120VAC
95VAC
135VAC
208/240VAC
175VAC
255VAC
380/415VAC
310VAC
430VAC
440/480VAC
380VAC
500VAC
50/60Hz
ABC
≤ 300ms
≤ 50ms
Electromechanical relay, energized when the
phase sequence is correct
Isolated SPDT
10A resistive @ 240VAC
8A resistive @ 240VAC
250VAC
Protection
Isolation Voltage
120 & 240VAC
380 & 480VAC
Mechanical
Mounting*
Dimensions
Termination
Environmental
Operating/Storage
Temperature
Weight
≥ 1500V RMS input to output
≥ 2500V RMS input to output
Plug-in socket
H
81.3 mm (3.2”);
W
60.7 mm (2.39”);
D
45.2 mm (1.78”)
Octal 8-pin plug-in
AC Line Frequency
Phase Sequence
Response Times
Pull-in
Drop-out
Output
Type
Form
Rating
120 & 240VAC
380 & 480VAC
Maximum Voltage
-40°to 55°C / -40° to 85°C
≅
6 oz (170 g)
*CAUTION: Select an octal socket rated for 600VAC operation.
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/pls
www.littelfuse.com/
Rev: 1-A-062716
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