Littelfuse 201A-AU 190/480 VAC 50/60 Hz Relay

The 201A-AU series is a three-phase, auto-ranging, dual-range voltage monitor that protects 190–480 V ac, 50/60 Hz
motors regardless of their size. This monitor provides a user-selectable nominal voltage setpoint and will automatically
select between the 200 V and 400 V range. Additional adjustment knobs allow the user to set a 1–30 second trip delay,
a manual restart or 1–500 second restart delay, and a 2–8% voltage unbalance trip point. It includes advanced, single LED
diagnostics where color and light patterns distinguish between faults and normal conditions. This unique micro controller based voltage and phase-sensing unit constantly monitors the three-phase voltages to detect harmful power line conditions.
When a harmful condition is detected, the output relay is deactivated after a specified trip delay. The output relay
reactivates after power line conditions return to acceptable levels for a specified restart delay time (or manual reset).

Specifications:

Manufacturer: Littelfuse
Manufacturer Part Number: 201A-AU
Product Type: Relay
Voltage Rating: 190/480 VAC
Frequency Rating: 50/60 Hz
General Purpose Rating: 10 A @ 240 VAC
Pilot Duty Rating: 480 VA @ 240 VAC
Dimensions: 2.8" x 3.5" x 5.35"
Weight: 2.0 lb.

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