3-Phase voltage/phase monitor from Littelfuse

Littelfuse 201A Voltage/Phase Monitor 

from Sords Electric

For a quote, please contact us HERE!

The 201A is a 3-phase, auto-ranging, dual-range voltage monitor that protects 190-480VAC, 50/60Hz motors regardless of size. The product provides a user selectable nominal voltage setpoint and the voltage monitor automatically selects between the 200V and 400V range. The 201A includes advanced single LED diagnostics, where color and different light patterns distinguish between faults and normal conditions.

This unique microcontroller-based voltage and phase-sensing device constantly monitors the 3-phase voltages to detect harmful power line conditions. When a harmful condition is detected, the 201A’s output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to acceptable levels. 

Littelfuse 201A 3-Phase Voltage/Phase Monitor

 

 

 

 

 

 

 

 

 

 

Features and Benefits

Proprietary microcontroller based circuitry 

Constant monitoring of single-phase, low voltage, voltage unbalance, phase reversal, harmful power line conditions. High voltage monitoring optional. 

 

Compact design for 8-pin; DIN rail or surface mount 

Allows flexiblility in panel installation 

 

Auto-sensing wide voltage range 

Automatically senses system voltage between 190 - 480VAC. Saves setup time. 

 

Advanced LED diagnostics 

Quick visual indicator for cause of trip. LED indications include: normal operation, power-up restart delay, reverse-phase trip, unbalance/single-phase trip, high/low voltage trip

Specifications  

Frequency 50/60Hz

Functional Characteristics

Low Voltage (% of setpoint)

Trip 9 0% ±1% 

Reset 9 3% ±1%Voltage Unbalance (NEMA)Trip 6%Reset 4.5% 

Optional High Voltage (% of setpoint) Trip 110 % ±1% Reset 10 7% ±1% 

Trip Delay Time >> High/Low Voltage Fault 4 seconds 

Unbalance & Phasing Faults >>  2 seconds 

Restart Delay Time 

After a Fault >>  2 seconds 

After a Complete Power >>  Loss 2 seconds 

Output Characteristics 

Output Contact Rating (SPDT)

Pilot Duty 480VA @ 240VAC 

General Purpose >> 10A @ 240VAC 

General Characteristics

Temperature Range >> -20° to 70°C (-4° to 158°F) 

Trip & Reset >>  Accuracy ±1% 

Maximum Input Power >>  5 W 

Relative Humidity >> 10-95%, non-condensing per IEC 68-2-3 

Terminal Torque >> 12 in.-lbs. (for OT08-PC socket) 

Wire Gauge >>   12-22 AWG solid or stranded 

Transient Protection (Internal) >>  2500V for 10 ms

Standards Passed

Electrostatic Discharge (ESD) IEC 61000-4-2, Level 3, 6kV contact, 8kV airRadio 

Frequency Immunity (RFI), Radiated15 0MHz, 10V/m 

Fast Transient Burst IEC 61000-4-4, Level 3, 3.5kV input power & controls 

Surge 

Immunity IEC IEC 61000-4-5, Level 3, 4kV line-to-line;Level 4, 4kV line-to-ground 

ANSI/IEEEC62.41 Surge and Ring Wave Compliance to a level of 6kV line-to-line 

Hi-potential Test Meets UL508 (2 x rated V + 1000V for 1 min.) 

Safety Marks 

UL   (OT08PC octal socket required) UL508 (File #E68520)

CE   IEC 60947-6-2 

Dimensions H 44.45 mm (1.75”); W 60.33 mm (2.38”); D (with socket) 104.78 mm (4.13”)  

Weight 0.7 lbs. (11.2 oz., 317.51 g) 

Mounting Method >> DIN rail or surface mount (plug in to OT08PC socket) 

Socket Available Model OT08PC (UL Rating 600V)

 

For a quote, please contact us HERE!

Sords Electric

216-765-4230

www.sordselectric.com

 

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