Home » Littelfuse 50R-100-2, 50R Series, Single-Phase Voltage Monitor, Voltage Sensing AC 95 ~ 120VAC, SPDT (1 Form C)
Littelfuse

Littelfuse 50R-100-2, 50R Series, Single-Phase Voltage Monitor, Voltage Sensing AC 95 ~ 120VAC, SPDT (1 Form C)

In stock
SKU: 50R-100-2
$350.32
Rated voltage
Phase
Description

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The 50R series is a single-phase voltage monitor with a voltage-sensing circuit that constantly monitors the single-phase power for a low-voltage condition. When a harmful condition is detected, the MotorSaver® deactivates its output relay 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. This monitor is used in a variety of applications such as compressors, air conditioners, heat pumps, well pumps, sump pumps, and small conveyer motors.

Applications
• Fan motors
• Air conditioners
• Compressors
• Heat, well, and sump pumps
• Small conveyer motors

*Note: 50 Hz will increase all delay timers by 20%

Pre-order 6-8 Weeks

Specifications

Input Characteristics
Line Voltage 50R-100         95–120 V ac
50R200          190–240 V ac
50R400          380–480 V ac
Frequency 50*/60 Hz
Functional Characteristics
Low Voltage Trip (% of setpoint)        90%
Reset (% of setpoint)     93%
Delay Time (Nominal) Trip 4 seconds
Restart (low voltage) 2 seconds
Restart (complete power loss) 2 seconds
Output Characteristics
Output Contact Rating (SPDT - 1 Form C)
50R-100, 50R200 Pilot Duty                  480 VA @ 240 V ac
General Purpose       10 A @ 240 V ac
50R400 Pilot Duty                  470 VA @ 600 V ac
General Characteristics
Ambient Temperature Range Operating     -20°C to 70 °C (-4 °F to 158 °F)
Storage         -40 °C to 80 °C (-40 °F to 176 °F)
Maximum Input Power 5 W
Relative Humidity 10–95%, non-condensing per IEC 68-2-3
Terminal Torque 7 in.-lbs.
Wire Size 12–18AWG
Electrostatic Discharge (ESD) IEC 61000-4-2, Level 3, 6 kV contact, 8 kV air
Fast Transient Burst IEC 61000-4-4, Level 3, 3.5 kV input power and controls
Transient Protection (Internal) IEC 61000-4-5; 1995 ±6 kV
Dimensions H 74.4 mm (2.93”)
W 133.9 mm (5.27”)
D 74.9 mm (2.95”)
Weight 0.98 lb. (15.68 oz., 444.52 g)
Mounting Method #8 screws
Special Options
Opt. 2: Variable Restart Delay Manual, 2–300 seconds
Opt. 3: Variable Trip Delay 2–30 seconds
Opt. 9: High Voltage Detection
Operating Points Trip (% of Setpoint)         110%
Reset (% of Setpoint)      107%
Certification & Compliance UL           UL 508 (File #E68520)
CE           IEC 60947-6-2