Product Info
Description
HIGH VOLTAGE GATE IN
Repair
ICC’s large inventory investment includes DS200FHVAG1A. ICC’s highly skilled technicians have the training and expertise to repair DS200FHVAG1A. In addition, our DS200FHVAG1A repairs come with a warranty. Please fill out our Request a Quote form with DS200FHVAG1A in the Subject Line, and/or include DS200FHVAG1A in the Message, for additional information about ICC’s DS200FHVAG1A. A ICC Business Development Leader will assist you with your DS200FHVAG1A needs shortly!
Reman
Purchasing a remanufactured GE DS200FHVAG1A offers substantial savings over new/unused with the functionality and reliability to match. Our assurance in remanufactured products allows ICC to offer 24 Months Warranty.
Exchange
Exchange is the combination of quick supply with applied discount against your old faulty card. Send us your old GE DS200FHVAG1A and we will replace (exchange) with a remanufactured spare, supplied with 24 Months Warranty
DS200FHVAG1A is a High Voltage Gate Interface Board manufactured by General Electric as part of gas turbine control systems. It is a special-purpose board that provides the necessary SCR gate interface and cell voltage monitoring functions for the LCI power converter. The board dimensions are 3.25” and 5” wide and no power supplies are required. It operates in an ambient temperature environment of (32 - 122 F) plus (18 F). rise inside the cabinet. It provides an isolated path for gate power from the gate plus amplifier board to one 77mm SCR. Since the voltage drops across the SCR and sends a signal back to the FGPA. LED mounted on a board when SCR blocking voltage is present.
DS200FHVAG1A Circuit Details
This board includes circuitry to: Provide an isolated path for gate power from the Gate Pulse Amplifier (FGPA) board to one 77 mm SCR. When the voltage drop across the SCR exceeds a certain threshold, send a signal back to the FGPA. When an SCR blocking voltage is present, light an LED mounted on the board. This LED is used to indicate the presence of cell voltage.
Gate Pulse Transformer
A toroidal current transformer (CT) soldered to the board serves as the gate pulse transformer. The single-turn primary wire from the board can be centered in the CT window thanks to a hole in the board. Because of this design, the CT can withstand the electrostatic corona that surrounds power wiring.
Gate Termination Circuit
This circuit rectifies the gate transformer's output, provides enough burden resistance to ensure good noise immunity, and connects to the SCR gate leads.
SCR Cell Status Circuit
The FHVA board determines whether the SCR is in the OFF mode by sensing the presence of current in the 10K ohm equalizer resistor connected in parallel with the SCR.
Diagnostic LED
The SCR Status Circuit also illuminates a red LED labeled C STAT to indicate the presence of blocking voltage. When the bridge power is turned on, the light from this LED should be visible, though it will dim slightly as the SCR conduction angle is increased.
DS200FHVAG1A Application Data
Resistor Protection
If the FHVA is powered on without an SCR gate connected to P1, pins P1-1 and P1-2 should be shorted together. This keeps resistors R1 and R2 from overheating.
Fiber-optic Transmitter Protection
If the FHVA board is left unconnected for an hour or more, insert a rubber plug in U1 to prevent dust accumulation on the lens.
DS200FHVAG1A Connections
Fiber-optic transmitter U1 (Gray). The presence of voltage across SCR T1 is indicated by the output.
The primary connection is made through the T1 CT window. For best corona avoidance, center in the CT window.
To SCR Gate, P1-1. Gate power is sent to the SCR gate. (The white conductor of a Red/White pair.)
P1-2 to the SCR cathode SCR gate power return (The red conductor of a Red/White pair.)
Connection of the equalizer resistor E1. (stab joiner)
E2 -Equalizer current return path from status circuit to SCR. (stab joiner)
