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Phase Selector Relay :

PHASE SELECTOR' is the protection relay developed by 'Proton Electronics' to provide automatic switching between the R-,Y-,B- phases for providing one of the live phase supply uninterruptedly. The unit offers following protections along with 3 digit display showing R-N,Y-N,B-N voltages in scanning mode with precise accuracy.

1] Under Voltage
2] Over Voltage
3] Phase Failure

Fault Messages will be shown after the display of R-N, Y-N & B-N Voltages.

SALIENT FEATURES :

  • Microcontroller based technology.
  • Automatic Phase Switchover if current Phase fails or under voltage/overvoltage/unhealthy condition occurs to that particular phase
  • Contacts provided for Power Fail Alarm
  • Voltage protection along with digital voltage readout.
  • Wide range of supply variation.
  • On Time is settable.
  • Healthy Span is settable.
  • Protection against Under voltage.
  • Protection against Over voltage.
  • All the set points settable by keys.
  • Indications of Relay ON for each phase .
  • No separate auxiliary supply required.
  • Hold feature:- Press INC key in Running condition to observe particular supply voltage.

TECHNICAL SPECIFICATION :

Supply Voltage : 300-500 VAC, Three phase R,Y,B,N (No auxilliary supply)
Output Contacts : ONE changeover LIVE output for each phase & Power fail Alarm Relay Contact (Potential free NC-C-NO), Rating 5A at 230VAC
Voltage trip setting : Default 290 V For OV with digital display (resolution of 1 V) Default 90 V For UV with digital display (resolution of 1 V) ( Hysterisis between cut off & cut in is 10V)/td>
Trip Time delay : UV trip delay is fixed 3 sec.
OV tripping isinstant.
ON Delay : Selectable by keys from 3 to 60 sec. Default 10 sec.
Healthy Span : Healthy Span for ON Phase is settable.Default 30V Range: 10 to 50 V
Reset Mode : Auto reset.
Indications : R : RED LED : R-PHASE RELAY IS ON
Y : YELLOW LED: Y-PHASE RELAY IS ON
B : GREEN LED : B-PHASE RELAY IS ON
Messages : uVr Flt:- R-Phase Under voltage
uVy Flt:- Y-Phase Under voltage
uVb Flt:- B-Phase Under voltage
oVr Flt :- R-Phase Over voltage
oVy Flt:- Y-Phase Over voltage
oVb Flt:- B-Phase Over voltage
Hld on- :- Hold the Display
Hld oFF:- Hold disabled
Keys : [ SET ] SET key, To select a set point function.
[ /\ ] INC key, To increment set point.
[ \/ ] DEC key, To Decrement set point.
Operating Temperature range : -5 0C to 60 0C.
Relative Humidity : 10-95%
Mounting : DIN RAIL mounting.

Working :

In the normal run mode, display shows Voltages Vry,Vyb,Vbr for 10 sec. each If the supply is within the range (No faults)then display shows count down for time set in the set point ( default 10 sec) & after that Relay will be ON. If OV/UV/SPP/Reverse Phase or unbalance occurs in the supply then Relay will be OFF & corresponding fault LED starts blinking.Hysterisis betwen Cut off & cut in is 10V for OV & UV. Note that for SPP & Unbalance LED is not blinking but message appears on display at end of scanning. but display shows particular fault"rP" at the end of scanning.All the faults are indicated by message.

If phase reversal occurs then Relay 1 will be off & after time delay Relay 2 will be ON.
If phase sequence is Ok then again Relay 1 will be ON.
OV,UV,SPP is applicable for both relays

SET POINTS :

- In the normal run mode, display shows Voltages Vrn,Vyn,Vbn for 4 sec. each

-If the supply is within the range (No faults)then display shows count down for on time set in the settings ( default 10 sec) & after that whichever phase is closer to 210 V that Phase Relay will be ON.

-There will be noswitchover of phase unless & until selected phase voltage moves out of selected span [210+SPn or 210-SPn]
v -If OV/UV/ Phase Failure/unhealthy condition occurs to the ON relay Phase then that Phase Relay will be OFF & whichever Phase is closer to 210 V that Phase Relay will be ON after the On Time set.
v -Hysterisis between cut in & cut off for UV & OV is 10 V.All the faults will be indicated by message.

-The Phase Relay switchover will be there if present Relay On Phase gets failed or faulty/unhealthy condition occurs to it.

SET POINTS :

- To set Under voltage set point press SET key once,'uV' messagedisplays, now again press SET key to view/change the Under Voltage Set point.The set point is viewed (default 90V)now user can set the UV set point using arrow keys.

- To set Over voltage set point press SET key till 'oV' message dis plays, now again press SET key to view/change the Over Voltage Set point.The set point is viewed (default 290V) now user can set the OV set point using arrow keys.

- To set On delay set point press SET key till display shows 'dLy' again press SET key then the set point is viewed(default 10sec.) now user can set the on time for relay using arrow keys.

- To set span for healthy phase ,press SET key till display shows 'SPn' again press SET key then the set point is viewed(default 10 sec.)
now user can set the span for healthy phase using arrow keys.

WORKING

- Hold feature:- Press INC key in Running condition to observe particular phase supply voltage..

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