DEIF reverse power relay

Print document
  • Model:


  • Request Code:

    RMP-121D No:2913310520-xx

  • Company:


  • Country:


  • Rate:
  • 4.0
  • From
  • 5
  • Votes:
  • 1
  • Visits:
  • 335

The protective reverse power relay type RMP-112D forms part of a complete DEIF series of relays for protection and control of generators and is applicable to both marine and land-based installations. Also available are reverse power relays (RMP-121D) . The RMP-112D is type-approved by major classification societies and is applied for protection of the prime mover against overload. This is especially required if the prime mover is undersized in proportion to the AC generator. Supervision of the reverse power will prevent a generator running in parallel with other generators from running as a motor - thus protecting the prime mover - and will at the same time ensure that the remaining generators connected to the system are not disconnected due to overload of these. Measuring principle: The relay measures all 3-phase currents and phase voltages. The TDM (Time-Division-Multiplication) principle ensures an accurate measurement of the RMS value of the power, irrespective of wave form and asymmetry. The RMP-121D is available with the following couplings: 1W Single phase 1W3 1-element 3-phase 3-wire, balanced load 1W4 1-element 3-phase 4-wire, balanced load If either the power exceeds its set point, the associated output is activated. The set point value is set on the front of the relay by means of a potentiometer. If exceeded, a fault signal is generated, and the associated yellow LED is lit. Relay outputs : The RMP-112D is provided with an output with a maximum contact, either normally energised or normally de-energised. The contact may be set to open or to close on activation. Normally energised contact : Recommended for land-based installations for warning and alarm purposes. In case of an auxiliary supply drop-out, the contact is immediately activated. Normally de-energised contact : Recommended for marine installations for regulating and control purposes. An auxiliary supply failure will not result in an unwanted activation of the contact. Features : ●Protection against "motoring" ●Single phase measurement ●LED indication of alarm condition ●Timer-controlled tripping ●LED indication for activated relay Borna Niroo Karan (Bornika) is the exclusive agent of DEIF in the fields of consultation , sales and distribution of power industry products including DEIF reverse power relay products .

  • Output 1 minimum contact
  • Frequency Range 40 to 45 to 65 to 70 Hz
  • IP IP40
  • Nominal Voltage 57.7-63.5-100-110-127-200-220-230-240-380-400-415-440-450-480-660-690 VAC
  • Nominal Current 0.3-0.4-0.5-0.6-0.8-1.0-1.3-1.5-2.0-2.5-3.0-4.0-5.0 A AC
  • Dimensions 99.7x75x110 mm
  • ANSI CODE 32
Price List

If you want to access to our price list,

You may login to our site: or

Or contact numbers in order to get informed about:

Tel: +98 21 53815
Email: و


Download catalog file: Reverse power relays, RMP-121D 429 KB

More Details
  • Ordering code
  • Ordering Code RMP-121D No:2913310520 -xx : xx : 01 : DC Supply 02 : AC Supply
  • Overload
  • 4 × In, continuously, 20 × In for 10 s (max. 75 A) 80 × In for 1 s (max. 300 A) Load Max. : 0.5 VA per phase
  • Refinery
  • Power industry
  • Petrochemical industry
  • Automotive industry
  • Military and defense industry
  • Oil and gas industry
  • Power Plant industry
  • Panel building companies
  • Education and Laboratory industry
  • Engineering services industry
  • Railway and subway industry