NOJA Power

Press Release

Published 12/2021

NOJA Power releases Voltage Dependent Overcurrent and Multistage Frequency and Voltage Protection for OSM Recloser System

Close up of NOJA Power OSM38 sitting on top of red frame in substation
NOJA Power OSM38 in Samara, Russia

International Electrical Engineering firm NOJA Power today confirms a suite of new protection and control features for their OSM Recloser with RC Series Control. Forming part of Firmware version 1.27, this release includes Voltage Dependent Overcurrent, Multistage Frequency and Voltage Protection, and Bluetooth Module support.

This firmware version is available as an optional upgrade for users of the RC-10 and RC-15 Recloser Controls. All new RC-10’s and RC-15’s manufactured by the firm will be shipped with firmware version 1.27, unless otherwise specified.

Image of substation in Samara with NOJA Power OSM Recloser with RC10 Controller on top of red frame in centre of image
NOJA Power OSM Recloser with RC-10 Control installed in Russian Federation

Voltage Dependent Overcurrent, ANSI Code 51V, offers Voltage Controlled and Voltage Restrained overcurrent elements. It is typically applied in generator connection applications. With the increase in usage of OSM Reclosers for Distributed Generation connections, the addition of 51V is a natural progression for the RC platform product evolution.

“With our continued focus on providing interconnection solutions for largescale renewable energy distributed generation, these new protection features allow our customers to continue to meet the demands required by electricity utilities globally to connect largescale renewable energy to their grids,” says NOJA Power Group Managing Director Neil O’Sullivan.

Following the theme of Distributed Energy connections, the incorporation of Multistage Frequency and Voltage protection into the OSM Recloser with RC Control System further expands the products’ capabilities in these applications. Multistage Frequency and Voltage protection is an emerging requirement for Renewable Energy integration. NOJA Power’s OSM Recloser and GMK products are both commonly used in this application, and the addition of multistage frequency and voltage protection furthers the integrated capabilities of the system. It further removes the need for additional relays and instrumentation in renewable energy connection projects, allowing the OSM Recloser to fulfil all protection and control requirements.

NOJA Power OSM Recloser connecting a Solar Generation plant to the NSW Australian Distribution Grid
NOJA Power OSM Recloser connecting a Solar Generation plant to the NSW Australian Distribution Grid

Bluetooth support has also been added to the RC-10 and RC-15 products, available as an additional Bluetooth hardware accessory coupled with the version 1.27 firmware version. This accessory is available from NOJA Power or your local NOJA Power Distributor.

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