(RCU) Remote Communication Unit

The Remote Communication Unit (RCU) is used to connect the Fusesaver (FSR) pole-mounted circuit breaker or Compact Modular Recloser (CMR) into a utility’s SCADA system.

The RCU is a pole-mounted enclosure containing a microprocessor, a short-range radio (approximately 20 m) for communication with the switchgear, and a long-range radio (or modem). The long-range radio (or modem) is not supplied or fitted by Siemens unless specifically agreed upon in the sale contract.

The purpose of the RCU is to provide SCADA system access for monitoring and controlling Siemens switchgear installed on distribution power lines. The RCU maintains an internal database that stores information about the switchgear being monitored and the RCU itself. This data is accessible through the SCADA system.

The SCADA system accesses the RCU’s internal database using a SCADA protocol, such as DNP3, via a long-range radio or modem. Different SCADA protocols have varying capabilities and methodologies.

Typically, to update the firmware/configuration of the RCU or switchgear, the user must physically attend the site and work directly with the equipment using the short-range (ANT) radio.

Remote Engineering Access (REA) provides an alternative to on-site visits for configuration changes and event downloads. REA enables a TCP/IP network connection from Siemens PC Tools to the RCU and through to the switchgear.

With REA, users can fully access and utilize Siemens PC Tools as if they were physically on-site, streamlining maintenance, reducing downtime, and improving operational efficiency.

This user guide provides information on how to configure Remote Engineering Access for use with the Siemens portfolio of Overhead Medium Voltage Systems products, PC Tools, and cloud services, including:

• Remote Communication Unit (RCU)
• Fusesaver (FSR)
• Compact Modular Recloser (CMR)
• RCU Connect
• Siemens Connect
• CMR Connect
• RCU Probe
• Siemens Outdoor Systems Data Management Cloud (SOS-DMC)

Thoroughly read this manual before using Siemens Remote Engineering Access.

The information contained herein is general in nature and not intended for specific application purposes. It does not relieve the user of the responsibility to use sound practices in the application, installation, operation, and maintenance of the equipment, services, or tools purchased.

Qualified Person

For the purpose of this user guide, a qualified person is someone familiar with the installation, construction, or operation of the equipment and the hazards involved. Additionally, this person must meet the following qualifications:

• Is thoroughly familiar with this user guide.
• Is trained and authorized to switch, de-energize, clear, ground, and tag circuits and equipment in accordance with established safety procedures.
• Is trained in techniques to distinguish exposed energized parts from other parts of electrical equipment and to determine the nominal voltage of exposed live parts.
• Is trained in the proper techniques to determine approach distances specified in the applicable local standards.
• Is trained in the decision-making process necessary to determine the degree and extent of the hazard, as well as the personal protective equipment and job planning required to perform the task safely.
• Is trained in the proper care and use of protective equipment, such as rubber gloves, hard hats, safety glasses or face shields, flash clothing, etc., in accordance with established safety practices.
• Is trained in rendering first aid.

Maintenance should only be performed by qualified personnel. The use of unauthorized parts in the repair of equipment or tampering by unqualified personnel will result in dangerous conditions that may cause death, severe injury, or equipment damage. Follow all safety instructions contained in this guide.

This version of the Remote Engineering Access user guide is compatible with the following hardware, firmware and software versions:

3AD8800-0B Remote Control Unit (Expanded) – B:

3AD8800-0B Remote Control Unit (Expanded) – BCMR_Quick_Reference_Guide_Scrubbed

RCU_KMS-0021 Remote Control Unit Operating Instructions:

RCU_KMS-0021 Remote Control Unit Operating InstructionsCMR and Fusesaver comparison FL – for restricted use

Guide:

RemoteEngineeringAccess_UserGuide