OLRP Relay

The OLRP is an ISO 9001:2000 compliant, local designed and manufactured three phase motor protection relay. It is a micro-controller based precision instrument with protection and advanced control features. The relay is designed to cater for the low voltage motor protection market and is available in different current models. The current transformers and the core balance current transformer are internal.

The relay is fully configurable with the aid of front-end software. Event records can also be uploaded with for further analysis. All the settings are password protected. The relay has an on board database where time and date stamped records are kept. Two types of records are kept namely fault records (35 last faults) and event records (1400 events). In the case of event records, the user has limited access rights (read only). The front-end also has a data recorder and a spectrum analyser which could be used to analyse motor performance and supplied power quality respectively. The spectrum analyser can detect harmonics up to the 9th harmonic on any of the three phase currents.

The relay detects earth leakage currents with the aid of the external core balance current-transformer and is configurable to operate in inverse definite minimum time (IDMT) or instantaneous definite time (IDT) mode.

A unique feature is added to the relay in the form of simulation. This function could be used for personnel training or relay functionality testing.