PSR-A-3

Suitable for three phase unbalance / three motor control. It has Input voltage, output voltage, phase reversal, neutral break, motor lock, auto function failure protection & also has six input i.e. low cut and high cut control for each of three motor. Correction is done on both phase – phase & phaseneutral voltage. The input & output trip contact can be configurable as per MCCB with shunt trip & contactor on site.

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Specifications
Salient Features	32 Bit RISC floating point microprocessor. • Response time 60mSec. • Fast Fourier Transformation to eliminate Harmonics & Surges/Sag. • High performance & Accuracy. • Simultaneous display of all measured quantity. • Password protection for user programmable parameters. etc
Display/Front Panel	Fault Indication LEDs • Manual /Auto mode LEDs • Limit switches LEDs • Phase Selection LEDs • Manual/Auto selection switch. • Phase selection switch • Output voltage Increment/Decrement switch. •Reset switch.
Technical Specifications	Measurement Accuracy : Class 1(± 1% Of Full Scale), Input Voltage : Vr, Vb, Vy, Vn, Input Voltage Measured Range : 40-600V AC (L-L) / 10-350V AC (L-N), Voltage Withstand : 800V L-L Max., 1000V for 1 Minute, Isolation Between Terminal & Body: 2kV, Input Current : Ir, Iy, Ib, Input Current Range : 0-5 A(For instrumentation CT upto 150 A), Current Withstand : 10A Continuous, 50A for 1 Second, etc
Relay Card Description	For PSR-A3 & PSR-C3 nine potential free output contacts are provided: 1. R Phase Increase 2. R Phase Decrease 3. Y Phase Increase 4. Y Phase Decrease 5. B Phase Increase 6. B Phase Decrease 7. Hooter 8. Input Trip 9. Output Trip
Relay card selection(No. Of output contact)	Nine channel is to be used. Two each for three phase (R, Y, B) forward and reverse direction for three motor, one each for hooter, input trip & output trip respectively

PSR-A-3

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