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CROUZET CONTROL

3 phase over/under voltage relay M3US

Control relay for monitoring 3-phase networks without neutral. Adjustable switch at the front for adjustment of correct voltage in 3-phase networks. The switch's position is not registered until the operating voltage is switched on. If the switch position is changed during operation, all LEDs (LED indications) begin to flash but the unit will continue to function normally with the voltage that was set at the most recent power connection. Monitors under-voltage between the phases that can be set between -2 % and -20 % of Un (measurement voltage) and over-voltage that can be set between 2 % and 20 % of Un. Time delay Tt prevents relay change-over in the event of temporary disturbances and is adjustable between 0.3-30 s. Green LED (Un) indicates supply voltage OK. Yellow LED (R) indicates active relay output.

 

Over-/under-voltage

Control relay

1: Over-voltage

2: Hysteresis

3: Under-voltage

4: L1, L2, L3

5: Relay

6: Limit value with time delay for over-/under-voltage

 

 

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  • Phase control of line voltage
  • Wide range input voltage
  • 17.5 mm cabinet with DIN rail
  • LED indication

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Technical data

Approvals CE, CSA, RoHS, UL
Breaking capacity 5A, 250V AC/DC
Function Under/Overvoltage
IP class connection IP20
IP class housing IP30
Lower limit -2 - -20%
Mounting 35 mm DIN-Rail
Output 2x Relay
Selection of rated voltage 208, 220, 380, 400, 415, 440, 480V
Storage temperature max 70 °C

*Invisible Heading*

Storage temperature min -40 °C
Supply voltage 3 x 208-480V AC
Temperature operational max 50 °C
Temperature operational min -20 °C
Time delay startup 0,5 s
Time delay when exceeding the limit value 0,3-30s
Upper limit 2 - 20%
Weight 80 g

Measurements and connections

Control relay dimensions

Dimensions

Control relay connection

F1: Fast-blow fuse 100 mA (recommendation)

Technical illustrations

Control relay over/under-voltage

Over/under-voltage
1: Over-voltage
2: Hysteresis
3: Under-voltage
4: L1, L2, L3
5: Relay
6: Limit value with time delay for over-/under-voltage

Product description

Control relay for monitoring 3-phase networks without neutral. Adjustable switch at the front for adjustment of correct voltage in 3-phase networks. The switch's position is not registered until the operating voltage is switched on. If the switch position is changed during operation, all LEDs (LED indications) begin to flash but the unit will continue to function normally with the voltage that was set at the most recent power connection. Monitors under-voltage between the phases that can be set between -2 % and -20 % of Un (measurement voltage) and over-voltage that can be set between 2 % and 20 % of Un. Time delay Tt prevents relay change-over in the event of temporary disturbances and is adjustable between 0.3-30 s. Green LED (Un) indicates supply voltage OK. Yellow LED (R) indicates active relay output.

 

Over-/under-voltage

Control relay

1: Over-voltage

2: Hysteresis

3: Under-voltage

4: L1, L2, L3

5: Relay

6: Limit value with time delay for over-/under-voltage

 

 

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