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产品名称: RPFD三相四线无功功率继电器



RPFD三相四线无功功率继电器

Introduction:
It is a 3 Phase 4 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 4 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/4 W, 110/240/380/415 V AC; 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 x 27; Mounting (L x W) 67 x 46

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