50R LITTELFUSE | Alldatasheet
Document overview
- Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
- PDF pages: 2
Technical content
© 2019 Littelfuse, Inc. Protection Relays Voltage Monitoring Relays www.littelfuse.com/ Rev: 2-B-050719 www.littelfuse.com/50r
Description
The 50R series single-phase voltage monitor has a voltage- sensing circuit which constantly monitors the single-phase power for a low voltage condition. Single-phase motors on fans, compressors, air conditioners, heat pumps, well pumps, sump pumps and small conveyor motors are all applicable to the 50R Series. 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. Features & Benefits FEATURES BENEFITS Proprietary voltage sensing circuitry Constant monitoring of single-phase power for a low voltage condition Adjustable trip delay (-3 models) and restart delay (-2 models) settings Prevent nuisance tripping due to rapidly fluctuating power line conditions and allows staggered start up of multiple motors, after a fault, to prevent a low voltage condition High voltage detection (-9 models) Trips and resets at a fixed percentage of the setpoint: trip 110 %, reset 107 %.
600 V rated relay
Eliminates the need for a control transformer to step voltage down to 120–240 V for a control circuit Single-phase voltage monitor 50R SERIES Wiring Diagram 50R
Ordering Information
MODEL LINE VOTAGE DESCRIPTION 50R-100 95–120 V ac Fixed trip and restart delay 50R-100-2 95–120 V ac Fixed trip and variable restart delay (manual, 2–300s) 50R200 190–240 V ac Fixed trip and restart delay 50R2002 190–240 V ac Fixed trip and variable restart delay (manual, 2–300s) 50R2003 190–240 V ac Fixed restart and variable trip delay (2–30s) 50R20029 190–240 V ac Fixed trip and variable restart delay (manual, 2–300s) plus high voltage detection 50R400 380–480 V ac Fixed trip and restart delay 50R4002 380–480 V ac Fixed trip and variable restart delay (manual, 2–300s) 50R4003 380–480 V ac Fixed restart and variable trip delay (2–30s) 50R40029 380–480 V ac Fixed trip and variable restart delay (manual, 2–300s) plus high voltage detection
© 2019 Littelfuse, Inc. Protection Relays Voltage Monitoring Relays www.littelfuse.com/ Rev: 2-B-050719 www.littelfuse.com/50r 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 Safety Marks UL UL 508 (File #E68520) CE IEC 60947-6-2 Dimensions H 74.4 mm (2.93”); W 133.9 mm (5.27”); D 74.9 mm (2.95”) Mounting Method #8 screws 50R SERIES 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 % *Note: 50 Hz will increase all delay timers by 20 %