Press Release September 2017

How Much Better is an RC15? Comparing the Generations of NOJA Power Recloser Controllers

When it comes to deploying NOJA Power Reclosers in the field, over the years there have been a few controller options. From the original RC01, through to the modern RC15 controller, NOJA Power has been working hard to equip utilities with the tools they need to achieve reliable networks. With the recent release of the Legacy compatible RC15, even the historic OSM200 with RC01 controller can be upgraded to the latest RC15 device. Some RC01 Recloser Controllers have been in service for 15 years now, and it might be time to evaluate what benefits your business can access by taking on an upgrade path. It’s all fine and good to say it’s “an upgrade”, but how much of an upgrade are we talking about?

The table below shows you, in brief terms, just how much functionality has been upgraded. In retrospect, NOJA Power are well into their second decade of technology development – it’s no surprise there is an improvement in capability. The additions are all growth in a product which has been evolved over time to meet utility requirements.

Since inception, NOJA Power has focused on collaborating with utilities in guidance of the R&D Process, identifying challenges which are faced by engineers every day and engineering solutions to address these. Fault Locator, Co-Generation, IEC 61850 and Secure DNP3 are just a few of the latest functions developed in response to field requirements.

The release of the legacy compatible RC15-OSM200 kit has brought the latest in protection and control functionality in reach of the oldest NOJA Power devices in service. If you have an RC01 controlled NOJA Power Recloser, you now have an upgrade path to deploy the latest in Recloser Controller technology.

One of the greatest challenges solved by an upgrade to the RC15 is maintaining network-wide time stamping accuracy, regardless of SCADA or communications reliability. The RC15 controller provides end users with an inbuilt GPS, delivering time-stamping accuracy to the microsecond level. Since the time synchronisation is linked directly to GPS rather than a SCADA set time command, utilities can be sure that their full population of devices are always in sync.


Functionality RC01 RC10-OSM200


Directional Overcurrent and Earth Fault Protection

Directional Sensitive Earth Fault

Directional Negative Phase Sequence Protection

Dynamic Directional Change Response


Inverse Time Protection

User Defined Curves with 32 Time-Current Co-ordinates


High Set Instantaneous Elements

Inrush Restraint

Cold Load Pickup

Live Line Overcurrent

LL Allow Close


Phase Overvoltage (OV1)


Line-to-Line Overvoltage (OV2)


Neutral Displacement Overvoltage (OV3)


Negative Sequence Overvoltage (OV4)


Phase Undervoltage (UV1)

Line-to-Line Undervoltage (UV2)

Loss of Supply Undervoltage (UV3)

Voltage Sag (Uv4Sag)


Loss of Supply Detector

Under Frequency Protection

Over Frequency Protection


Neutral Displacement Protection (59N)


Admittance Protection (21Yn)


Broken Conductor Protection (46BC)


Synchronism Check (25)


Auto-Synchroniser (25A)


Fault Locator (21FL)


Live Load Blocking


Harmonic Protection


Automatic Backfeed Restoration

Loss of Supply Reclosing Mode

Automatic Change Over




Alarm Latching


Sequence Advance


Advanced Programmable Logic


DNP3 Protocol

DNP3 Security Authentication


IEC  60870-5-101 Protocol

IEC  60870-5-104 Protocol


2179 Protocol

IEC 61850 Protocol (GOOSE Publisher and Subscriber, MMS)


IEC 61499 Protocol (Smart Grid Automation)


Power Quality


Variable Panel Fast Key Configuration


Cellular Network Modem (2G, 3G and 4G)



Wi-Fi wireless connectivity



Global Positioning System (GPS)



“Many of our electricity utility customers today tell us they expect their recloser circuit breaker tanks to provide them with a 30 year life but they budget to upgrade the electronic control three times over the life of the their recloser circuit breaker tanks,” reports NOJA Power Group Managing Director Neil O’Sullivan. “These upgrades are to allow them to keep pace with technological changes in system protection, communications and security. The RC upgrade path for legacy recloser circuit breaker tanks meets this customer expectation.”

If you’d like to know more, contact with your local NOJA Power Distributor or go to

By Martin van der Linde – Marketing Manager NOJA Power