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Alarm Annunciators, Electronic Components, Process Control Instruments, Industrial Automation System, Microprocessor Based A.C. Controllers, Timers, Preventers, Microcontroller Based A.C. Controllers, Digital Panel Meters, Current Scanners, Digital Temp.Indicators & Controllers, Motor Protection Relays, Custom Built Electronic Equipments, RPM / Frequency Indicators, Line Frequency Meters, AC VoltMeters, AC Ammeter, Voltage Scanner, Humidity Indicators

Manufacturers of :

•	Microprocessor based A.C. Controller
•	Chiller Controller
•	Microprocessor based Alarm Annunciator
•	Compressor Guard
•	Digital Panel
•	Digital 3-Phase Auto Voltage/Current Scanner
•	Motor Protection Relays
•	Digital Panel Meter
•	AC / DC Power Monitor
•	Line Frequency Meter
•	AC Voltmeter
•	Voltage Scanner
•	Scanner
•	Temperature Indicator
•	A.C. Controller for ATM
•	Annunciator Fascia
•	Electronic Hooter
•	Electronic Timer
•	Audio-Visual Panel for Tel. Exchange Meters
•	Digital Temperature Indicators / Controllers
•	Custom Built Electronic Equipments
•	VAF Meters
•	RPM / Frequency Indicator
•	AC Ammeter
•	Three Phase / Single Phase Voltage Monitor
•	Process Indicator
•	Humidity Indicator
•	Fire Protection Panel

Phase Selector Relay :

PHASE SELECTOR :

'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)
ON Delay	Selectable by keys from 3 to 60 sec. Default 10 sec.
Trip Time delay	UV trip delay is fixed 3 sec. OV tripping isinstant.
Healthy Span	Healthy Span for ON Phase is settable.Default 30V Range: 10 to 50 V
Reset Mode	Auto reset.
Indications	RLY ON 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 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]

-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.

-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.