F3USN 3-phase voltage control
Controls over- and undervoltages on own power supply (window-type).
F3USN: phase and neutral
Minimum and maximum thresholds can be adjusted separately.
Detects absence of neutral on F3USN.
Delay on crossing upper or lower threshold adjustable between 0.1 and 10 sec. on front face.
2 yellow LEDs indicate over- and undervoltages.
1 green LED indicates presence of power supply.
2 output relays: high and low threshold
2 separate time delays
Operating principle
The two relays are energised when the measured voltages are between the minimum and maximum thresholds which can be separately adjusted via two potentiometers on the front face. If one or more voltages goes outside the window, the relay corresponding to the fault de-energises following a delay which can be adjusted on the front face. The relays each have individual delays (0.1 to 10 sec.).
A hysteresis fixed at 3% ensures bounce-free relay switching when the voltage levels return to a value between the upper and lower thresholds.
The unit is not affected by the phase sequence nor by harmonic distortion.
A green LED indicates the presence of the power supply voltage. Two yellow LEDs indicate when the upper and lower thresholds have been exceeded. The LEDs go out when the voltages are within the set window.
Supply voltage Un on terminals L1 - L2: 230 and 400 V AC ±20% 50/60 Hz
Delay on pick-up: Approximately 3 s
Adjustment of upper threshold: 102 to 155 % of Un
Adjustment of lower threshold: 85 to 98 % of Un
Output: 2 AgCdO (Silver Cadium Oxide) changeover
Breaking capacity: 2000 VA - 80 W
Maximum breaking current: 8 A AC DC
Maximum breaking voltage: 250 V AC DC
Minimum breaking current: 100 mA AC DC
Housing material: Self-extinguishing
Mounting: DIN-rail mounted
Weight: 310g
Operating temperature limit: -20 °C to +60 °C
For more information on technical data, please see data sheet.
If you have any questions about this product please email us at saadwaheed09@gmail.com
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