MRI3-IHE Time Overcurrent/Earth Fault Current Relay with Harmonic Stabilizing
The digitial multifunctional relay MRI3-IHE has been designed as a universal time overcurrent protection relay with evaluation of the 2nd harmonic for transformers.
The relay gives a complete thermal characteristic of the electrical equipment to be protected taking into account its initial load.
The MRI3-IHE furthermore provides a universal time-overcurrent and earth fault protection with the following functions:
Two-step overload protection with evaluation of the 2nd harmonic,
Display of the measured values for 1st and 2nd harmonic,
independent (Definite) time overcurrent relay,
inverse time overcurrent relay with selectable characteristics,
two-element (low and high set) earth fault protection with definite or inverse time characteristics.
Benefits and Key Features
19“ racks – fully withdrawable
Door mounting – withdrawable and sealable
Panel mounting – fully withdrawable
Fault / disturbance recorder
Display (of primary values)
Easy setting software – Smart view
Compact form factor
Interconnection of renewable energies (DER – distributed energy resources) to the public grid.
Protection of High, Medium and Low Voltage feeders against thermal damages by overload or short circuit currents.
|Inputs and Outputs|
|Current transformer inputs||4|
|Time overcurrent protection||50/51||•|
|Inrush stabilisation (2nd harmonic)||•|
|Earth fault protection||50N/51N||•|
|Circuit breaker failure protection||50BF||•|
|Fault recorder (none volatile)||•|
|RS485 Open Data Protocol||(Option)|
|Housing is withdrawable||•|
|Housing suitable for door mounting||•|
|Housing suitable for mounting plate||•|