Over-voltage protection relay RMQ 121D

under-voltageover-excitationunder-excitation

Loss of Excitation Relay/Over-excitation Relay This Uni-line relay protects generators running in parallel with other generators from running as an induction generator due to under-excitation – particularly in cases where applying an under-voltage relay for protection is insufficient. The RMQ-121D relay protects generators against overexcitation 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.