Excitation relay

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  • Model:

    RMQ-111D , RMQ-121D

  • Request Code:

    RMQ-1xxD , No: 2913320yyy-zz

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The protective loss of excitation relay type RMQ-111D and the over-excitation relay type RMQ-121D form part of a complete DEIF series of relays for protection and control of generators. The relays are type-approved by major classification societies and are applicable to both marine and land- based installations. Loss of excitation relay type RMQ-111D (ANSI code 40) : This relay is applied to protect a generator running in parallel with other generators from running as an induction generator due to under-excitation. The RMQ-111D will thus protect the generator against damages caused by excessive heating due to slip frequency current flow, at the same time preventing transfer of reactive load from a faulty generator. The RMQ-111D is especially applied in cases where applying an under-voltage relay for protection does not suffice, because the remaining generators of the system can supply sufficient reactive power to magnetise the faulty generator, thus maintaining the terminal voltage of the generators. Over-excitation relay type RMQ-121D (ANSI code 40/O) This relay is applied to protect a generator against over-excitation and will prevent it from generating too high currents in case of heavy inductive loads. The RMQ-121D will thus protect the generator against damages caused by excessive heating of its windings, at the same time preventing transfer of reactive load to a faulty generator. Features : ●Loss of excitation/over-excitation ●Protection of generators ●Single phase measurement ●Timer-controlled tripping ●LED indication of fault/activ. relay Borna Niroo Karan (Bornika) is the exclusive agent of DEIF in the fields of consultation , sales and distribution of power industry products including Excitation relay products .

  • Output 1 minimum contact
  • Frequency Range 40 to 45 to 65 to 70 Hz
  • IP IP40
  • Dimensions 99.7x75x110 mm
  • Voltage Supply 57.7-63.5-100-110-127-220-230-240-380-400-415-440-450-480-660-690 V AC ±20 % (max. 3.5 VA) 24-48-110-220 V DC -25/+30 % (max. 2 W)
  • 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
  • Nominal Voltage 57.7-63.5-100-110-127-200-220-230-240-380-400-415-440-450-480-660-690 VAC
  • ANSI CODE 40
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Download catalog file: Excitation relays, RMQ-111D, RMQ-121D 464 KB

More Details
  • Ordering code
  • Ordering Code RMQ-1xxD No:2913320yyy-xx : xx : Numbers 11 and 21 yyy : Numbers 060 and 520 060 : RMQ-111D 520 : RMQ-121D xx : Numbers 01 and 02 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
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