RPTD Reverse Power Relays

Introduction: It is a 3 Phase 3 Wire Reverse Power Relay. It is best suitable for monitoring the reverse flow of power from the 1 Phase or 3 Phase Generators or Emergency Power Supplies or when motors act as Generators. It senses the direction of power (current) by sensing the reverse Current. The power is calculated as V x I (Reverse Current) x COS f. It is measured by considering 5 Amps as the maximum Reverse Current for 100% Reverse Power. It can be preset from 2% - 20% reverse power. If the current from the Generator becomes reversed and it exceed the setting then the relay trips.

Features: · Adjustable Reverse Power (Current) setting (2% - 20%) · Suitable for 3 Phase 3 Wire or single phase system. · Direct Current sensing or through 5A external CT. · Built in Auxiliary Supply. · Adjustable Power ON Delay : 1-10 Sec. · Adjustable Trip Time Delay – 1-10 Sec. · 1 CO (2 CO) Relay output rated 5A at 230V AC (Resistive) · Auto / Manual Reset.

Application Areas: General panels Motor starter panels HT motor starter panels Power distribution panels 3 phase UPS panels Centrifugal machine control panels

Technical Specifications:

Sr. Parameter Specifications 1 Supply Voltage System 3 Ph/3 W, 110/240/380/415 V AC ±20%; Auxiliary — 2 Ext. Input Built-in 3 Output contact 1 CO (2 CO) 4 Trip setting Under Current —; Over Current —; Under Frequency —; Over Frequency —; Under Power —; Over Power —; Cos-Ø —; Reverse Power 2% - 20% (adjustable) 5 Input Current Range — 6 Power On Delay 1 - 10 secs. (adjustable) 7 Trip Time Delay 1 - 10 secs. (adjustable.) 8 Resetting Auto / Manual 9 Weight 460 gms. 10 Dimensions (mm) Overall (L x W x D) 76 x 56.5 x 117.5; Mounting (L x W) 67 x 46