Smart disconnector IDD

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Technical specifications

The Smart disconnector IDD is designed for remote operational sectionalizing of 6-36 kV overhead lines and selective detection of permanent and transient faults, including short-circuit and earth faults.

Integration of the Lodestar IDD into a power line automation system enables building an efficient and cost‑effective line sectionalizing system. The smart disconnector provides a visible break between equipment taken out for maintenance and energized equipment.

Comprehensive Fault Management

The Smart disconnector IDD is a versatile solution, capable of detecting both stable and unstable faults, including phase-to-ground faults. Its intelligent control system ensures accurate identification and immediate response, significantly reducing downtime and service interruptions. Atriy's unique Lodestar technology is integrated into the Smart disconnector IDD for enhanced precision and reliability in fault detection and effective operational control.

Key Benefits:

• Line sectionalizing functionality – enables efficient and cost-effective segmentation of overhead lines.
• Directional detection of earth faults – available with the Lodestar CL0.5B model for precise fault location.
• Disconnector control blocking – prevents operation in the presence of voltage and/or current.
• Remote control of grid sections – allows flexible network management from a control center.
• Integration with SCADA systems – seamless connection to the user’s existing automation infrastructure.
• Battery life – 24 hours, supporting at least 50 open/close cycles of the disconnector.
• Power-on lock – prevents closing when the earthing switch is closed, ensuring operator safety.

Detailed Technical Advantages and Specifications

The IDD's high voltage three-phase disconnector ensures effective management of overhead line faults by precisely isolating problematic segments and maintaining uninterrupted power flow. Key technical specifications include:

• Rated voltage: 6-36 kV
• Rated current: 400 A/630 A
• Short-term sustained current: 10 kA 
• Electrodynamic resistance: 25 kA 
• SCADA Integration via IEC-104 protocol
• GSM/GPRS modem for remote communication
• Bluetooth BLE for remote configuration
• Operating temperature range: –40°C to +70°C

Operational switching is carried out via the automated drive located in the disconnector’s control cabinet, with the status clearly visible both remotely on the dispatcher’s control panel and locally at the device.

Lodestar IDD Functional Features:

• Directional determination of fault (with Lodestar CL0.5 model)
• Safety interlocks preventing switching under load
• Remote grid section management
• SCADA system compatibility
• Extended battery life ensuring at least 50 cycles within 24 hours
• Safety features such as switch lock when earthing switch is active

Integrating Atriy’s intelligent disconnector IDD ensures robust, secure and highly reliable electrical networks, capable of swiftly responding to faults and maintaining uninterrupted service.