Products-GoLead Intelligent

SID-3510

Inrush Current Suppressor

The SID‑3510 Inrush Current Suppressor is GoLead Intelligent’s newly developedgeneration of phase control device.

It is built upon two of our proprietaryinvention patents and integrates extensive field experience from the previous‑generation SID‑3YL InrushCurrent Suppressor.

By applying precise phase control technology, it effectively suppresses bothoperational overvoltage and inrush current, making it widely suitable forswitching unloaded transformers, capacitor banks, and no‑load transmission lines.

For transformer switching applications, thedevice employs an advanced residual flux calculation algorithm that determines the transformer’s residual magnetism usingonly the controlled‑side voltage datarecorded during breaker opening.

Based on the calculated residual flux, thesystem applies an optimal closing‑angle selection algorithm to determine the target angle for the nextclosing operation.

This algorithm enables excellent inrushsuppression even in non‑controlledopening conditions, significantly improving field flexibility and overallinrush mitigation performance.

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Main Functions

(1)
Phase-angle-based control for opening and closing operations
(2)
Independent phase or interlinked operation control
(3)
Closing control based on real-time residual flux calculation
(4)
Adaptive compensation mechanism
(5)
Automated analysis of circuit breaker operations
(6)
Multivariable correction of breaker operating time
(7)
Event logging and waveform recording
(8)
Supports integration with Online Analysis and Management System

KEY Features

1

Redundant Control

Dual operating systems to ensure operational reliability of the device
2

Dual-Coil Architecture

Dual-coil output control architecture for enhanced actuator performance
3

Residual Flux-Based Switching

Real-time residual flux calculation, enabling optimal closing angle and adaptive control strategy for transformer switching
4

Self-Adaptive Timing Correction

Breaker operation time calculation after each action, with real-time acquisition of environmental parameters to automatically correct future timing control
5

High-Resolution Sampling

200 sampling points per power cycle to ensure high-precision measurement
6

Flexible Breaker Control

Supports both phase-separated and interlinked breaker control
7

One-Click Magnetization Control

One-click sequential control with integrated magnetization controller to suppress inrush current during first-time transformer energization
8

Digital Substation Integration

Full digital interface, supporting GOOSE and SV communication for integration with intelligent substation control systems
9

Accurate Closing Angle Control

High-precision closing angle control using advanced algorithms and MOSFET-based output switching, ensuring minimal deviation

SPECIFICATIONS

Rated Frequency

50 Hz or 60 Hz
Input Rated Voltage

110 V or 220 V DC
Output Relays

Dual‑series Potential‑free (dry) contacts
Time Synchronization Interfaces

IRIG‑B, SNTP, Optical B Code
Communication Interfaces

Serial ports × 2
Ethernet ports × 4
USB × 1
Operating Environment

Operating Temperature: −20 ~ +55 °C
Storage Temperature: −20 ~ +80 °C
Relative Humidity: ≤ 90%