Products-GoLead Intelligent

SID-409(B)

Backup Power Auto Transfer Devices

SID‑409B is a highly integrated automatic transfer controller for backup power systems, supporting up to 9 standard switching schemes and 4 breaker combinations, making it suitable for a wide range of power transfer scenarios.

It features parallel/series transfer modes, fast automatic decoupling, load shedding by section, and synchronism detection, meeting the demands of live transfer and rapid power restoration. The controller includes built-in waveform recording, alarm handling, event logging, and auto retransfer logic, greatly enhancing overall system reliability.

Built on an industrial-grade, high-stability hardware platform with an embedded real-time operating system, it supports mainstream communication protocols such as Modbus and IEC 61850, and offers bilingual (Chinese/English) interface options—making it an ideal solution for ensuring safe and reliable power delivery to critical loads.

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Main Functions

(1)
Default support for 9 backup transfer schemes; up to 4-switch combination configurations
(2)
Enables segmented load-shedding under undervoltage conditions to protect priority loads
(3)
Provides real-time switching reports, comprehensive event and SOE logging, with backup export functionality
(4)
Supports parallel, series, and semi-automatic parallel transfer modes to adapt to various power configurations
(5)
Enables quick and automatic decoupling during ring operations; includes segment breaker and incoming line overload/acceleration protection
(6)
Records over 100 switching or protection action waveforms; accessible and analyzable via supervisory software
(7)
Supports manual transfer, abnormal condition transfer, and automatic retransfer initiation modes
(8)
Includes alarm functions such as undervoltage, PT disconnection, and post-start acceleration protection
(9)
UI supports multilingual display, including Chinese and English, for global applicability
(10)
Enables live bus transfer with synchronism verification using one-click operation
(11)
Configurable output contact behavior for reclosing redundancy or customized control logic
(12)
Supports external printer configuration; allows multiple devices to share a single printer
(13)
Automatic return-to-main functionality with reclosing lockout if breaker status is abnormal
(14)
Precisely measures and records breaker closing times to support predictive diagnostics
(15)
Supports B-code and SNTP time sync, and integrates with Modbus, IEC 61850, and IEC 60870-5-103 communication protocols

KEY Features

SPECIFICATIONS