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Voltage monitoring relays RMV-112D, RMV-122D and RMV-132D are designed to protect generators, electric motors and transformers from unacceptable voltage changes in the network in all three phases. They can be used both on ships and onshore installations. In this line, there is a separate modification of the RMV-142D voltage relay for operation in single-phase networks.

Current monitoring relays RMC-111D, RMC-121D, RMC-122D, RMC-131D, RMC-132D, RMC-142D are designed to protect generators from overload and short circuit currents. The relay measures the current in three phases and trips to the maximum of them. High measurement accuracy is ensured with sinusoidal currents.

Active power relays RMP-111D, RMP-112D, RMP-121D manufactured by DEIF provide protection and control of generating sets.
The RMP-111D relay serves for overload protection. This protection is especially important if the prime mover of the generator has a small overload capacity.
RMP-121D - for protection against reverse power when the frequency of other generators connected to the bus is exceeded.
RMP-112D - for overload and reverse power protection.

Reactive power relays RMQ-111D, RMQ-121D protect against loss of excitation (RMQ-111D) or overexcitation (RMQ-121D). The RMQ-111D prevents overheating and damage to the generator while preventing the faulty generator from generating reactive power. The RMQ-121D prevents overheating of the generator windings while maintaining reactive power transfer to the emergency generator.

The frequency control relay RMF-112D is used for protection against low / high frequency in single-phase or three-phase networks. The relay has a timer that is activated when the setpoint value is exceeded. When the timer expires, a fault signal appears. If the measured value returns to normal limits before the time delay has expired, the timer is reset.

Mains voltage failure relay LMR-111D, LMR-122D is used in protection systems for generators operating in parallel to the power supply network. Detection of the disappearance of the mains voltage is possible under the condition of a sharp change in the frequency of the generator due to an open circuit at an arbitrary point in the network. In this case, a signal is sent to the mains switch, which opens it and thus protects the generator from possible damage as a result of automatic reconnection to the high-voltage network.

The relay for turning on generators for parallel operation HAS-111DG is used to check the conditions of synchronization and synchronization of the generator with the mains. The relay measures the values ​​of the generator and busbars in order to obtain data on frequency deviation, voltage and phase difference. The HAS-111DG has a built-in self-test function. The function monitors the microprocessor, which ensures the correct operation of the program.

Synchronization relays FAS-113DG, FAS-115DG are designed for protection and control of generating sets. Synchronizers can be used to control various types of drive motors, from slow-reacting diesel engines to fast-reacting gas turbines. Installation of these relays is possible on a mounting panel or on a standard DIN-35 mm rail.

Load sharing relays LSU-112DG, LSU-113DG, LSU-114DG, LSU-122DG are designed to control drive motors of generating sets. They have several modes of operation:
  • single work with frequency maintenance;
  • parallel operation with the network while maintaining the specified power;
  • parallel operation with other generators with frequency control and power distribution.
Specifications:
  • Measuring voltage range: 57.7 - 690 VAC current
  • Measured current range: 0.4 - 5 A
  • Frequency response: 45 - 65 Hz
  • Working temperature range: -25 ° C - + 70 ° C
  • Protective performance: IP40 (case); IP20 (terminals)


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