Products-GoLead Intelligent

SID-40B

Backup Power Seamless Transfer Device

SID‑40B Backup Power Seamless Transfer Device is a high‑performance automatic transfer controller designed for backup power systems. It supports various complex switching modes including parallel, series, and interlocked transfer/retransfer, with millisecond-level response time and high-precision A/D synchronous sampling technology.

The device integrates multiple transfer logic schemes, supporting intelligent startup under fault conditions, trip-lock under critical failures, and healthy phase verification, ensuring rapid, disturbance-free transfer to the backup source when abnormalities occur in the main power supply.

Equipped with powerful event logging and waveform recording/analysis capabilities, SID‑40B supports mainstream protocols such as Modbus, IEC 61850, and IEC 103, and is ideal for use in industries with stringent power continuity requirements, including petrochemical, power generation and distribution, and rail transit sectors.

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Main Functions

(1)
Six Default Backup Power Transfer Schemes — Supports up to five-switch conventional transfer combinations, with customized transfer logic available for special application requirements
(2)
Automatic Fault Detection and Blocking — Actively identifies internal faults on the supply bus and blocks transfer logic to prevent incorrect switching operations
(3)
Sectionalized Low-Voltage Load Shedding, Fast Automatic Decoupling for Ring-Connection Operation, and Conventional Three-Stage Overcurrent Protection with Time Acceleration
(4)
Multiple Switching Modes — Supports parallel transfer, series transfer, simultaneous transfer, and semi-automatic parallel transfer to meet diverse system configurations
(5)
Coordinated Control for Generators, Synchronous Machines, Special Feeders, and Critical Loads — Enables load shedding and load pickup logic for complex power systems
(6)
Transfer Action Reporting and Event Recording — Provides real-time switching reports, comprehensive operation and remote signaling event logs, data export, and playback/analysis via upper-level software
(7)
Various Manual and Automatic Transfer Initiation Methods — Includes manual normal transfer, manual abnormal-condition transfer, and automatic fault-condition transfer
(8)
Automatic Healthy-Phase Selection for Bus Transfer — During supply anomalies, automatically selects the healthy phase on the bus to improve the success rate of backup power energization
(9)
Special Feeder and Load Control — Supports flexible load pickup and shedding strategies for different supply system configurations and operational requirements
(10)
Five Analog Criteria for Abnormal Condition Initiation — Each criterion can be independently enabled or disabled for flexible system adaptation
(11)
Voltage Dip (Brownout) Monitoring with Fast Return-to-Transfer — Supports multi-level fast transfer coordination across multiple devices in a networked scheme
(12)
Comprehensive Time Synchronization & Communication Protocols — Supports B-code timing, SNTP, and industry-standard protocols such as Modbus, IEC 61850, and IEC 60870-5-103
(13)
Five Combined Conditions for Transfer and Closing Logic — Includes fast transfer, withstand-voltage transfer, synchronism-check capture, residual-voltage transfer, and long-delay transfer
(14)
Switch Abnormality Monitoring and Blocking Alarms — Detects and blocks transfer in cases of abnormal position status or not-ready state to ensure safe operation
(15)
Industrial/Military-Grade Integrated Circuits for High Stability and Reliability — Supports multi-device fast transfer networking to achieve coordinated, sequential high-speed actions

KEY Features

1

Rugged Design

Ruggedized standard enhanced chassis, designed for strong vibration and EMI resistance
2

High Reliability

Industrial-grade or military-grade ICs, ensuring high stability and reliability
3

Precise Sampling

High-speed, high-precision multi-channel A/D synchronous sampling, enabling fast response and accurate measurement
4

Real-Time OS

Embedded real-time operating system with TCP/IP protocol stack, offering high reliability and easy scalability
5

Graphical HMI

Large graphical LCD display with full Chinese menu, providing intuitive HMI and easy operation/debugging
6

Flexible Switching Logic

Built-in multiple automatic transfer schemes, adaptable to various power supply scenarios, with customizable logic upon request
7

Analog-Based Start

Multiple analog-based proactive startup criteria, suitable for switching under various abnormal power supply conditions
8

Custom Closing Logic

Multiple configurable closing criteria, each independently enabled/disabled and conditionally settable, ensuring safe and rapid transfer for different load types
9

Healthy Phase Selection

Automatic healthy-phase selection during power failure transfer, increasing successful transfer rate to backup source
10

Load Group Control

Coordinated switching control of special feeders and loads, meeting operational demands of complex system/load configurations
11

Coordinated Fast Action

Hierarchical high-speed switching coordination, enabling orderly and fast operation among multiple devices
12

Protocol Compatibility

Supports multiple communication protocols for backend monitoring system integration
13

Multilingual HMI

Multilingual user interface, supporting online language switching
14

Extensive Data Logging

Large-capacity data recording, providing extensive logging for events and operations

SPECIFICATIONS

Rated Frequency

50 Hz or 60 Hz
PT Rated Voltage

100 V or 57.7 V
Input Contact Rated Voltage

110V or 220 V DC
Output Relays

Potential‑free (dry) contacts
Communication Interfaces

3 × Serial ports, 3 × Ethernet ports
Operating Temperature

–20°C~+55°C
Storage Temperature

–20°C~+80°C