Littelfuse 50R200, 50R Series, Single-Phase Voltage Monitor, Voltage Sensing AC 190 ~ 240VAC, SPDT (1 Form C)
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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%
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 |