IS200EXHSG3AEC - Exciter HS Relay Driver Board

SPECIFICATIONS

Part Number: IS200EXHSG3AEC
Manufacturer: General Electric
Country of Manufacture: United States (USA)
Number of relay channels: 12
Size: 8.26 cm high x 4.19 cm wide x 12.1 cm deep
Technology: Surface-mount
Series: EX2100
Function: Exciter HS Relay Driver Board

Functional Description

IS200EXHSG3AEC is a Exciter HS Relay Driver Board developed by GE. It is part of the GE Speedtronic EX2100 gas turbine control system. The Exciter High-Speed Relay Driver (EXHS) board is an integral component of the EX2100 Excitation Control system, playing a crucial role in providing drivers for various components essential for excitation control in industrial applications. 

Features

• Excitation Control Functions: The board is primarily responsible for driving the DC contactors (41) and pilot relays required for de-excitation and field flashing within the EX2100 Excitation Control system. These components are vital for controlling the flow of electrical current and ensuring proper operation of the excitation system.
• Pilot Relays for Field Flashing: On the board, pilot relays are provided for the flashing relays 53A and 53B, which are essential for field flashing operations. These relays play a crucial role in initiating and controlling the process of establishing the field current in synchronous generators.
• Pilot Relays for De-excitation: Additionally, the board includes pilot relays for the de-excitation relay KDEP. These relays are instrumental in the safe and controlled de-energization of the excitation system, preventing excessive voltage buildup and ensuring operational safety.
• Signal Conditioning and Transmission: Performs signal conditioning for de-excitation status signals originating from the Exciter De-Excitation Board (EDEX) and crowbar status signals from the De-Excitation Control Board (EXDE). These conditioned signals are then transmitted to the Excitation Monitoring and Instrumentation Output (EMIO) system for further processing and monitoring.

Product Attributes

• Power to Relay Coil: The relay coil receives power from J9, providing a nominal voltage of 125 V DC. It is important to note that the voltage supplied to the coil should range between 100 V DC (minimum) and 140 V DC (maximum) to ensure optimal performance.
• Power to Relay Contacts: Power for the relay contacts is sourced from the exciter cabinet, delivering a nominal voltage of 24 V DC. This voltage is utilized for controlling the operation of the relay contacts within the system.
• Relay Break Characteristics: The characteristics of the relay break are essential for determining its performance under different load conditions:
• Resistive Load: The relay can handle a resistive load of up to 2 A at 28 V DC, ensuring reliable operation when switching resistive loads.
• Inductive Load: For inductive loads, the relay can manage a current of 1 A at 28 V DC for a duration of 0.007 seconds (L/R). This specification indicates the relay's capability to handle sudden changes in current flow, typical in inductive load scenarios.
• Suppression: Suppression for the relay coil is supplied externally, with no suppression provided on the EXHS board itself. This ensures that any voltage spikes or transients generated during the operation of the relay coil are effectively mitigated, preventing potential damage to the system components.

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FREQUENTLY ASKED QUESTIONS

What is IS200EXHSG3AEC?
It is a Exciter HS Relay Driver Board and is part of the GE Speedtronic EX2100 gas turbine control system.

What are the primary functions of the relay drivers on the board?
The relay drivers on the EXHS board, namely K41 (M1, M2, C), are responsible for controlling the close function contactors, while K53A and K53B manage the flashing pilot relays. Additionally, KDEP serves as the single de-excitation pilot relay.

What are the purposes of the three 25-pin connectors, J505, J508, and J515?
These connectors facilitate communication between the EXHS board and the EMIO (Excitation Monitoring and Instrumentation Output) boards. J505 connects to M1, J508 connects to M2, and J515 connects to C. However, it's important to note that J515 does not carry de-excitation and crowbar signals.

What signals do the connectors J505, J508, and J515 carry?
The connectors carry similar signals and have similar wiring patterns. They facilitate the transmission of control signals and data between the EXHS board and the respective EMIO boards, enabling effective monitoring and control of the excitation system.

What is the purpose of plugs J12M1 and J12M2?
Plugs J12M1 and J12M2 serve to bring in 70 V DC from the M1 and M2 power supplies, respectively, for auxiliary contact wetting. This ensures proper functioning and longevity of the auxiliary contacts associated with the excitation control system.

How does the board contribute to the overall operation of the excitation control system?
It plays a crucial role in providing drivers for various components essential for excitation control, including close function contactors and flashing pilot relays. It ensures efficient and reliable operation of these components, contributing to the overall performance and safety of the excitation system in industrial applications.