GE IC3600ALTC1A

Product Overview

Product Parameters

• Product Model: IC3600ALTC1A
• Manufacturer: GE Energy (Speedtronic™ Series)
• Product Type: Thermocouple input/temperature control module
• Input Channels: 8 channels (thermocouple types K/J/E)
• Measurement Range: K type: 0-1372°C; J type: 0-760°C
• Cold Junction Compensation: Built-in CJC sensor (±1°C accuracy)
• Output Signal: 0-10V DC (linearly corresponding to temperature range)
• Accuracy: ±0.5% F.S. (full scale)
• Isolation Voltage: 500V AC (between channels)
• Operating Temperature: -20°C ~ +60°C
• Supply Voltage: 24V DC (±10%)
• Compatible System: GE Mark I Speedtronic
• MTBF: 150,000 hours (per MIL-HDBK-217F)

Structure and Composition

Signal Conditioning Layer

• Each channel is equipped with an independent low-noise amplifier + non-linear correction circuit (tailored to thermocouple characteristics).
• Cold junction compensation uses a precision thermistor (mounted on the terminal block).

Conversion and Protection Layer

• A V/F conversion circuit converts temperature signals into frequency, which is then filtered to generate a 0-10V output.
• Each channel is equipped with a self-resetting fuse and a TVS diode (for surge protection).

Backplane Interface Layer

• Communicates with the Mark I rack via a 34-pin gold-plated connector.
• Status indicators (green = normal; red = over-limit).

Key Features and Advantages

Gas Turbine-Specific Design

• Optimized for TTRF (Turbine Trip Reference) signals, with a response time of <100ms.
• Certified to API 670 mechanical protection standards.

High-Reliability Architecture

• Fully discrete component design (no vulnerable electrolytic capacitors) to adapt to high-temperature environments.
• Gold-plated contact connectors for strong corrosion resistance.

Maintenance-Friendly

• Modular plug-in design allows for quick on-site replacement.
• Independent isolation between channels ensures faults in one channel do not affect others.

Long-Term Spare Parts Support

• GE commits to providing lifetime spare parts supply for Mark I systems (advance ordering required).

Application Fields

Gas Turbine Protection

• Exhaust temperature monitoring (prevents turbine damage due to overheating).
• Bearing temperature alarm (interlocks with the IC3600SFFC1 safety module).

Steam Turbine Systems

• Cylinder metal temperature monitoring (for retrofitting old power plants).

Industrial Combustion Control

• Multi-point temperature monitoring of boiler furnaces.

Installation and Maintenance

Pre-Installation Preparation

• Use a millivolt signal source (e.g., Fluke 724) to verify the linearity of each channel.
• Ensure correct thermocouple polarity (positive/negative terminals match labels).
• Check that the rack grounding resistance is <1Ω (to prevent common-mode interference).

Maintenance Recommendations

• Calibrate every 2 years (using a dry-block calibrator as the simulated temperature source is recommended).
• Regularly clean terminal oxidation layers (use DeoxIT® D series contact cleaner).