IC3600SASC1C1F - Microsynchronizer Speed Control Card

SPECIFICATIONS:

Part No: IC3600SASC1C1F
Manufacturer: General Electric
Product Type: Microsynchronizer Speed Control Card
Control Platform: Speedtronic Mark II
Input Power: 24 V DC
Operating Temperature Range -35°C to +65°C
Control Method: Closed-loop speed and phase synchronisation
Board Dimensions: 2.5 cm × 8.5 cm
Mounting: Control rack
Power Supply Voltage: 24 V dc
Board Size: 2.5 cm high x 8.5 cm
Weight: 0.48 kg
Availability: In Stock
Country of Origin: USA

FUNCTIONAL DESCRIPTION:

IC3600SASC1C1F is a Microsynchronizer Speed Control Card manufactured and designed by General Electric as part of the Mark II Series used in GE Speedtronic Gas Turbine Control Systems. The IC3600SASC1C1F performs high-accuracy synchronisation and speed control by processing real-time feedback signals from turbine speed sensors, generator frequency inputs, and grid reference signals. The card continuously calculates speed error, phase deviation, and frequency mismatch between the turbine generator and the electrical grid. Based on these parameters, it generates control outputs that regulate turbine fuel flow or actuator response to achieve precise speed matching.

The microsynchronizer logic ensures that synchronisation occurs within permissible limits for phase angle, slip frequency, and voltage conditions before allowing breaker closure. This functionality minimises mechanical shock to the turbine shaft, reduces electrical transients, and protects both turbine and generator components from damage caused by out-of-sync operation.

CONTROL AND SIGNAL PROCESSING:

The IC3600SASC1C1F integrates analog conditioning circuits and digital logic to filter noise, scale sensor inputs, and process high-resolution speed signals. It supports stable operation during rapid load changes, startup acceleration, and steady-state operation. The card interfaces directly with other Mark II control modules to coordinate sequencing, permissives, and protective interlocks, ensuring synchronized operation across the entire turbine control architecture.

INSTALLATION:

Before installation or removal, the control system must be fully de-energized and isolated to prevent damage to electronic components and avoid electrical hazards. Ensure the card is seated correctly in the backplane connector and that the retention mechanism is fully engaged. Verify that the 24 V DC power supply is stable and within tolerance, and confirm correct polarity before applying power. Grounding and shielding should be implemented in accordance with GE EMC requirements to reduce noise coupling and signal interference. All signal wiring must match the GE Mark II wiring diagrams, ensuring correct termination for speed sensor inputs, grid reference inputs, and inter-card communication interfaces.

OPERATION:

The IC3600SASC1C1F monitors turbine speed, acceleration rate, and phase angle relative to the electrical grid. The card calculates speed error and phase deviation using feedback from the speed sensor and grid reference signals. As the turbine approaches synchronous speed, the module executes synchronization logic to adjust speed and phase alignment within allowable tolerances. Once synchronized, the card maintains closed-loop speed control by continuously comparing measured speed and phase against reference values, and issuing corrective control signals to the turbine control system. It compensates for transient load changes and grid disturbances by adjusting speed setpoints and maintaining synchronization stability. The module also provides status outputs and diagnostic signals for monitoring synchronization performance and identifying abnormal operating conditions.

SYSTEM COMPATIBILITY:

It is designed for integration with GE Speedtronic Mark II control systems. It interfaces with the Mark II backplane and communicates with other Mark II control modules using the standard Mark II inter-card signaling architecture. The module accepts speed feedback and grid reference inputs and outputs synchronization control signals that are used by the turbine governor and excitation control logic. It is suitable for gas turbine applications where closed-loop speed regulation and grid synchronization are required, including power generation and mechanical drive systems.

World of Controls maintains a comprehensive inventory of OEM GE Speedtronic Mark II replacement modules, including unused (new-old-stock) and rebuilt IC3600SASC1C1F cards, to support rapid replacement needs in turbine control systems. Rebuilt units undergo component-level inspection, fault isolation, and corrective rework, followed by functional testing against OEM specifications to verify signal accuracy, timing performance, and electrical tolerances. Repair services include diagnostic evaluation, solder joint repair, component replacement, and verification of power supply stability and I/O signal integrity to ensure compatibility with the Mark II control architecture. Technical support is available for troubleshooting, part identification, and integration guidance to restore reliable turbine control operation.

FREQUENTLY ASKED QUESTIONS:

What is a Microsynchronizer Speed Control Card?

A Microsynchronizer Speed Control Card is an electronic module used in turbine control systems to manage precise speed control and synchronization with the electrical grid. It processes feedback from speed sensors and grid reference signals to calculate speed error and phase deviation. The card then generates control outputs to align turbine speed and phase with grid parameters. This ensures safe breaker closure and stable power generation.

What does the IC3600SASC1C1F specifically control?

The IC3600SASC1C1F controls turbine speed regulation and synchronization functions within the GE Speedtronic Mark II system. It compares turbine speed and phase angle with grid reference values and issues corrective signals to maintain synchronous operation. The card is involved during startup, synchronization, and steady-state operation. It helps prevent mechanical and electrical stress during grid connection.

How does the Microsynchronizer card maintain synchronization accuracy?

The card continuously monitors speed and phase feedback signals and computes error values in real time. It uses closed-loop control logic to adjust speed setpoints and correct phase deviation. During synchronization, it ensures alignment within permissible tolerances for phase angle, frequency, and slip. This prevents out-of-sync conditions and reduces transient disturbances.

What are the typical input and output signals for this card?

Typical inputs include turbine speed sensor feedback, grid frequency reference, phase angle signals, and control permissive inputs from the main control system. Outputs generally include synchronization permissive signals, speed control commands, and status/diagnostic signals for monitoring. Signal interfaces follow GE Mark II wiring and backplane standards. The card integrates with other modules via the Mark II communication architecture.