Protection Relays
Voltage Monitoring Relays
201-XXX-SP-DPDT SERIES
Single-phase voltage/phase monitor
Description
The 201-xxx-SP-DPDT Series is an 8-pin octal-base, plug-in
voltage monitor designed to protect single-phase motors
regardless of size. The 201-100-SP-DPDT is used on 95-120VAC,
50/60Hz motors to prevent damage caused by low voltage. The
201-200-SP-DPDT is used on 190-240VAC, 50/60Hz motors. The
units feature two isolated sets of contacts that are ideal for use
with two control circuits with different voltages.
The unique microcontroller-based voltage and voltage-sensing
circuit constantly monitors the voltage to detect harmful power
line conditions. When a harmful condition is detected, the
MotorSaver’s output relays are deactivated after a specified trip
delay. The output relays reactivate after power line conditions
return to an acceptable level and a specified amount of time has
elapsed (restart delay). The trip delay prevents nuisance tripping
due to rapidly fluctuating power line conditions.
Must use Model OT08PC socket for UL Rating!
Note: Manufacturer’s recommended screw terminal torque for the RB Series and OT Series Octal
Sockets is 12 in.-lbs.
Wiring Diagram
Features & Benefits
FEATURES
BENEFITS
Proprietary
microcontroller
based circuitry
Constant monitoring of voltage to detect harmful
power line conditions, even before the motor starts
Prevents nuisance tripping due to rapidly fluctuating
power line conditions
Fixed trip delay 4s
Provides diagnostics which can be used for
troubleshooting and to determine relay status
Advanced LED indication
Compact design for 8-pin;
DIN rail or surface mount
Allows flexibility in panel installation
Accessories
OT08PC 8-pin Octal Socket
Octal Socket for plug-in units. 8-pin surface &
DIN rail mountable. Rated for 10A @ 600VAC.
Ordering Information
INPUT
VOTAGE
MODEL
DESCRIPTION
201-100-SP-DPDT
201-200-SP-DPDT
95-120VAC
Two isolated Form C relays
190-240VAC Two isolated Form C relays
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/201xxxspdpdt
Rev: 1-A-062716