35040026 - 350 Series – Three-Phase Voltage Monitor Relay Series

Littelfuse Voltage Monitoring Relays
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The 350 is a heavy-duty voltage monitor. This product should be used when high current relays or dual contacts are required, or 480V controls are used. Since the 350 uses heavy-duty relays, it comes in fixed voltage range models rather than a dual autoranging version like the Model 250.

The 350-200 has a 15A general purpose contact. The 350-400 provides a SPDT (Form C) relay rated to switch up to 600V, allowing the use of 480V controls, eliminating the need for a control power transformer to step the voltage down to 120-240V. Several DPDT (two Form C contacts) relay models are also available.

The 350 microcontroller-based family of products are low cost yet highly advanced solutions to heavy-duty problems. The 350 includes advanced single LED diagnostics. Five different light patterns distinguish faults and normal operating conditions. Other options such as high voltage trip and adjustable restart delay are available.

Property (Mouseover for details) Value
Input Voltage (V) 380 - 480 Vac
Maximum Input Power 5
Input AC Line Frequency (Hz) 50 / 60 (50 will increase all delay timers by 20%)
Output Form DPDT
Output Load Rating (VA) Pilot Duty: 480 VA @ 240 Vac; General Purpose: 1 - 10 A and Pilot Duty: 480 VA and 240 Vac; General Purpose: 1 hp @ 240 Vac
Restart Delay Range Manual; 2 - 300 s adjustable
Trip Delay Range Under Voltage: 4 s; Unbalance/Phase faults: 2 s
Trip Point Accuracy (%) ±1%
Undervoltage Trip Voltage 90%
Undervoltage Reset Voltage (%) 93%
Voltage Unbalance Trip Point (%) 6%
Voltage Unbalance Reset (%) 4.50%
Termination Type Torque: 7 in-lbs; Wire Size: 12 - 18 AWG
Mounting Method #8 screws
Operating Temperature -40° to 70°C (-40° to 158°F)
Storage Temperature (F/C) -40° to 80°C (-40° to 176°F)
Dimensions 2.93 H x 5.27 W x 2.95 D in. (74.4 x 133.9 x 74.9 mm)
Weight (lbs/g) 0 Kg
Check Stock Yes
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