Single Phase Preventer 2

Protection of induction motors against single phasing or reverse phasing or unbalance supply is one of the major problems in electrical systems. For safe running of 3-phase motors, special protections that keep a continuous watch on supply conditions are very essentials. The major cause of maxium motors burn-out is overloading which occurs due to unbalance supply or single phasing. Phase failure occurs in case of fuse blown-off, loose connections or loss of phase from supply itself.
'PROTONs MULTIFUNCTION RELAY - SPP 2' offer these protections along with LOW/HIGH voltage tripping to ensure the trouble free running of 3-phase motors.

SALIENT FEATURES :

Operates on the principle of sensing negative sequence components of the system.
Suitable for the protections of motors of any H.P.
Protection against single phasing, reverse phasing, unbalance supply, under/over voltage.
Variable trip voltage setting for under/over voltage protection. Fixed unbalance trip setting at 40 volts.
No separate auxiliary supply required.
Individual trip indication for under voltage, over voltage, single phasing, reverse phasing and indication for output relay ON.
Auto reset type voltage hysterisisgap for tripping on under/over voltage.

TECHNICAL SPECIFICATION :

* Due to continuous change, specifications are subject to change without notice.

System Supply :	415 VAC, Three phase +/- 10%
Output Contacts :	One changeover ( C-NO-NC)
Output contact rating :	5 Amps at 230 V AC.
Trip Time delay :	2-3 seconds.
Variable Voltage Setting	: For Under voltage, 330 TO 370 VAC.
	For Over voltage, 430 TO 470 VAC.
Reset Mode :	Auto reset.
Trip Indications :	For over voltage, under voltage, single phasing and reverse phasing and relay ON indication.
Unbalance trip setting :	Fixed at 40 Volts between any two phases..
Temperature range :	-5 0C to 60 0C.
Relative humidity :	95% R.H.
Mounting :	Din rail.
	Base mounting dimensions 55 (W) x 65 (L) x 125 (D) mm.
Auxiliary Supply :	24 V DC, +/- 10% (optional feature)

APPLICATION :

Electrical Panels.	Compressor motors.
Electrical Test benches.	Submersible pumps.
Genset panels.	Cold storages.
Package unit and central air Conditioning Plants.