PRODUCT FILES

PT436

THREE-PHASE ASYMMETRY AND SEQUENCE CONTROL RELAY WITHOUT NEUTRAL WITH ADJUSTABLE DELAY

The device is used for protection of three-phase asynchronous motors from electrical power supply disturbances. It is typically employed in submersible pump protection systems.

It monitors the three phase network against absence of one or more phases, asymmetry (adjustable, 5-25%), incorrect connection sequence, under-voltage and over-voltage.

The device is used for protection of three-phase asynchronous motors from electrical power supply disturbances. It is typically employed in submersible pump protection systems.

It monitors the three phase network against absence of one or more phases, asymmetry (adjustable, 5-25%), incorrect connection sequence, under-voltage and over-voltage.

No neutral connection is required.

It is installed in an electrical panel on a standard relay socket.

The output relay is activated when all the following conditions are met: a) the three (polar) phases of the power supply do not differ between them in percentage more than the user adjustable value b) the phases do not exceed upwards the limit of 435V AC and c) they are connected in the correct sequence. In any other case, as well as in case of complete loss of a phase (below 300V AC), the relay is deactivated. When normal power supply is restored, the relay is activated after the expiration of a user-adjustable interval. When the RELAY ON led indication is off the relay is deactivated, when it is on the relay is activated and when it is blinking the delay interval is in process.

It is a digital device using a microcontroller.

  • power supply
    3 x 400V AC / 50Hz
  • relay outputs
    One changeover contact relay 10Α / 250V AC cat. AC1 
  • indications
    POWER ON and RELAY ON
  • connection socket
    Bulb type, 8p or 11p
  • protection
    Varistor (against overvoltage and lightning)
  • operation temperature
    -20 to +50 C
  • adjustments
    Ασυµµετρία  5 – 25% Vnom  / Χρονοκαθυστέρηση:  1 – 15 min
    
  • enclosure
    Plastic box / 42x89x94mm / IP41