Protection Relays
Voltage Monitoring Relays
201-XXX-SP SERIES
Single-phase voltage/phase monitor
Description
The 201-xxx-SP series is an 8-pin octal-base, plug-in voltage
monitor designed to protect single-phase motors regardless of
size. The 201-100-SP is used on 95–120 V ac, 50/60 Hz motors
to prevent damage caused by low voltage. The 201-200-SP is
used on 190–240 V ac, 50/60 Hz motors. The 201-200-SP-T-9 is
a pin-for-pin replacement for aTime Mark® #260 series voltage
monitor. High voltage protection is included in the 201-200-SP-T-9.
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 relay is deactivated after a specified trip
delay. The output relay reactivates 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.
Wiring Diagram
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.
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 4 s
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 10 A @ 600 V ac.
PIN-OUT 1 (201-XXX-SP)
(view of socket)
PIN-OUT 2 (201-200-SP-T-9)
(view of socket)
Ordering Information
MODEL
LINE VOTAGE
95–120 V ac
190–240 V ac
DESCRIPTION
201-100-SP
201-200-SP
SPDT, protects single phase motors
SPDT, protects single phase motors
SPDT, direct replacement for
Time Mark® #260 series
201-200-SP-T-9
190–240 V ac
© 2020 Littelfuse, Inc.
www.littelfuse.com/201xxxsp
Rev: 12-A-0621721260