GE IS200RCSAG1ABB RC Snubber Assembly EX2100 Series

GE IS200RCSAG1ABB RC Snubber Board

The IS200RCSAG1ABB is a passive RC snubber assembly manufactured by General Electric for its EX2100 Excitation Control System. This board protects power semiconductors from damaging voltage transients during switching operations in high-power applications.

Technical Specifications

• Brand & Model: General Electric (GE) IS200RCSAG1ABB
• Product Type: RC Snubber Board (RCSA)
• System Platform: GE EX2100 Excitation Control System / Mark VI Speedtronic
• Frame Compatibility: Designed for 1800 and 1000 Frame Innovation Series units
• Power Supply: 25 V DC operating voltage
• Operating Temperature: -35 to +65 °C (-31 to +149 °F)
• PCB Coating: Normal Coating

Physical Specifications

• Board Dimensions: 23.8 cm high x 8.6 cm wide (9.37" x 3.39")
• Weight: 0.45 kg (0.99 lbs)
• Mounting: Four factory-drilled holes for installation
• Country of Origin: USA
• Manual Reference: GEI-100303

Primary Function & Design

• Provides snubber circuits for nonregenerative SCR (Silicon-Controlled Rectifier) and diode-type power modules
• Contains two identical resistor-capacitor (R/C) snubber networks—one for the SCR connection, one for the diode connection
• Primary purpose is to absorb and dissipate high-voltage transients (spikes) generated during the switching of inductive loads
• Protects power semiconductors from electrical overstress, preventing premature failure
• Reduces electromagnetic interference (EMI) and improves system reliability

Hardware Characteristics

• Component Type: Passive component board—contains only resistors, capacitors, and connection hardware
• Active Features: No active components, fuses, test points, LEDs, or movable jumpers
• Connections: Includes two sets of connections for SCR and diode modules
• Mounting Support: The board is mechanically supported and mounted by the corresponding SCR/diode power module for each phase

How the Snubber Circuit Works

• Each R/C circuit is connected across the anode and cathode terminals of its power device (SCR or diode)
• During switching, the capacitor absorbs the sudden energy surge (voltage spike)
• The resistor then dissipates this stored energy as heat, limiting the rate of voltage rise (dv/dt)
• This action prevents false triggering of SCRs and reduces stress on component insulation
• Contributes to enhanced electromagnetic compatibility (EMC) for the entire system

System Integration

• Integral part of the GE EX2100 excitation control bridge for generators
• Used in applications involving nonregenerative power sources
• Provides noise isolation for associated gate drive circuits
• Each phase in the power bridge typically requires its own snubber board

Typical Applications

• Generator excitation control systems in power plants
• High-power industrial motor drives
• Any application using SCRs or diodes with inductive loads where voltage transients are a concern

Packaging & Shipping

• The IS200RCSAG1ABB board is shipped as a single, complete assembly.
• Protected in appropriate packaging to prevent physical and electrostatic damage.
• Worldwide express shipping via FedEx, UPS, and DHL available.

Frequently Asked Questions (FAQ)

• What is an RC snubber? It is a passive circuit (Resistor + Capacitor) used to suppress voltage spikes ("transients") across a switching device.
• What does this board protect? It protects SCRs and diodes in the excitation bridge from damaging voltage spikes caused by inductive load switching.
• What frames is it compatible with? It is designed for use with GE's Innovation Series 1800 Frame and 1000 Frame nonregenerative power modules.
• Does it have any indicators or controls? No. It is a purely passive, non-configurable board with no LEDs, test points, or fuses.
• How is it mounted? It mounts directly onto or adjacent to the SCR/diode power module it protects, using four drilled holes.
• What manual covers this board? Refer to GE technical manual GEI-100303 for detailed specifications and application data.
• Why is snubber protection important? Without it, voltage transients can cause immediate failure or gradual degradation of expensive power semiconductors, leading to unscheduled downtime.

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