INTRODUCTION

The MRPF-100 Remote Fault Passage Monitor has been developed to detect MV and HV fault passage and send this information in real time to the Network Control Room.

The MRPF-100 monitors the three phase currents separately, which results in a precise fault detection, overcoming the limitations and inaccuracies of other existing fault passage indicators that only monitor the resultant of the three phase currents.

This low cost innovative system is easily installed and detects phase to neutral, phase to phase and three phase faults, with non-isolated neutral networks.

The MRPF-100 detects fault direction while discriminating capacitive (return) currents. This is of great utility due to the increasing number of distributed generation elements in the networks.

Fault indication is monitored sending SMS messages to the Control Room.

HOW DOES IT WORK?

The MRPF-100 system is made of the following devices:

• Three Current Sensing Devices (CSD's) that are easily installed in the overhead cables using a pole (one device per phase). These devices calculate the state of each phase (Open, Normal or Fault) and transmit this information to a Communications Concentrator through a very low power radio link.
• One Communications Concentrator (CC), which gathers the information sent by the CSD's and sends a message to the utility's SCADA when a fault passage is followed by a trip of the line's protections. A GSM modem is used to communicate with the utility.

The CC is based on low consumption electronics and powered by a battery and a solar panel.

Each CSD is self-powered by means of a transformer which feeds from the current going through the cable. Thus, since no batteries are needed, the CSD's are maintenance-free.

ADVANTAGES

• Easy installation of the current measuring devices using an isolated pole.
• Speeds dramatically fault location time.
• Reduces power restoration time.
• Detects fault direction.
• Operative in radial and ringed lines.
• Discriminates capacitive (return) currents in fault detection.
• Friendly remote configuration of the equipment.
• Possibility of remote monitoring of phase current.
• Remote indication of battery fault.
• Low Cost.

TECHNICAL FEATURES

Tel: +34 94 674 5321
email: comercial@kementsu.com Aritz Bidea, 63
E48100 Mungia - Bizkaia - Spain Kementsu S.L.
CIF: B48516306