RED615, part of ABB’s 615 product series, is a phase-segregated two-end line differential protection and control intelligent electronic device (IED) that is perfectly harmonized for utility and industrial power systems, including looped and meshed distribution networks with or without decentralized power generation.
Re-engineered from the ground up, the new 615 series has been designed to unleash the full potential of the IEC 61850 standard for communication and interoperability of substation automation equipment with minimal disruption.RED615 provides high speed, longitudinal differential protection for overhead line and cable feeders in distribution networks. Two RED615s interconnected over a communication link form an absolutely selective unit protection scheme. Protectionof ring-type and meshed distribution networks generally requires unit protection solutions, also applied in radial networks containing distributed power generation.Typical RED615 applications include two or multiple parallel lines between substations and meshed cable networks in urban and suburban areas. Line differential protection is also applied to industrial power systems and special objects, such as power systems for road and rail tunnels and cable networks for wind farms.
Standardized communication
RED615 features native support for the new IEC 61850 standard for communication in substations. The relay also supports the industry-standard Modbus® protocol 3.0. The in-depth implementation of the IEC 61850 substation communication standard in RED615 also includes horizontal peer-to-peer communication over a substation-wide Ethernet LAN using the GOOSE-services defined by the standard.
Protection communication supervision
The communication channel between each end of the protected line is constantly supervised. Should the communication channel be interrupted or suffer interference, the fast-acting line differential protection functions will be restrained immediately. The automatic restraint affects all functions that rely on the continuous availability of the protection communication channel.The channel supervision includes recognition of missing or delayed telegrams carrying sampled analogue measurement values or binary information.The sensitivity of the supervision function and the reset delay are user-selectable. Prolonged interference and a total interruption of the communication channel will trigger an alarm message, which can be used to alert the network operator and to release a back-up protection scheme.
Pre-emptive monitoring
To secure the operational availability of the protection, RED615 incorporates a range of monitoring and watchdog functions to supervise the hardware and software, the communication system and the circuit-breaker trip circuit.Hardware supervision also incorporates the current transformers (CTs). CT faults may cause undesired operation of the line differential protection and the phase unbalance protection. Therefore, a fast-acting CT supervision system blocks the operation of the line differential protection function and the phase unbalance protection function on detection of any CT signal anomaly.
Rapid set-up
RED615 features a unique plug-in design that speeds up installation and testing. And since RED615 is adapted specifically for the protection of overhead lines and cable feeders, it can be rapidly set up and commissioned, once it has been given the application-specific settings. If the settings need adjustment, the flexibility of the RED615 allows the standard signal configuration to be altered by the signal matrix tool (SMT) included in the PCM600 IED setting and configuration tool.Connectivity packages containing detailed descriptions of ABB’s protection IEDs, with data signals, parameters and addresses, enable the IEDs to be automatically configured via the MicroSCADA Pro system, the COM600 Station Automation series devices or the PCM600 IED setting and configuration tool.RED615, part of ABB’s 615 product series, is a phase-segregated two-end line differential protection and control intelligent electronic device (IED) that is perfectly harmonized for utility and industrial power systems, including looped and meshed distribution networks with or without decentralized power generation.