IS200TRESH1B - Small Steam Turbine Emergency Trip Board

SPECIFICATIONS:

Part Number: IS200TRESH1B
Manufacturer: General Electric
Series: Mark VI
Number of Trip Solenoids: Three Solenoids per TRES
Trip Solenoid Rating: 125 V DC
Trip Solenoid Circuits: Circuits rated For NEMA
Solenoid Response Time: Solenoid L/R Time constant is 0.1 sec
Mounting: DIN-rail mounting
Technology: Surface mount
Operating temperature: 40 to 70°C
Size: 17.8 cm high x 33.02 cm
Repair: 3-7 Day
Availability: In Stock
Country of Origin: United States
Manual: GEH-6421M

FUNCTIONAL DESCRIPTION:

IS200TRESH1B is a Relay Output with Coil Sensing Terminal Board manufactured and designed by General Electric as part of the Mark VI Series used in GE Speedtronic Gas Turbine Control Systems. TRES is used for emergency overspeed protection for small/medium size steam turbines. TRES is controlled by the I/O controller and provides power to three emergency trip solenoids, which can be connected between the TRES and TRPS terminal boards. TRES provides the positive side of the 125 V dc to the solenoids and TRPS provides the negative side. The I/O controller provides emergency overspeed protection, and emergency stop functions, and controls the three relays on TRES, which control the three trip solenoids.

• TRES has both simplex and TMR forms.
• There are seven dry contact inputs for trip interlocks.
• TRES has no economizing relays.
• There are no emergency stop inputs.

In the TRES, the seven dry contact inputs excitation, and signal are monitored and fanned to the I/O controller. The board includes the synch check relay driver, K25A, and associated monitoring, the same as on TREG, and the servo clamp relay driver, K4CL, and its associated monitoring. A second TRES board cannot be driven from the I/O controller through J4.

INSTALLATION:

The three trip solenoids are wired to the first I/O terminal block. Up to seven trip interlocks are wired to the second terminal block. The wiring connections are shown in the following figure. Connector J2 carries three power buses from TRPS, and JH1 carries the excitation voltage for the seven-trip interlocks.

OPERATION:

The I/O controller controls TRES. In simplex systems, a third cable carries a trip signal from J1 to the TSVO terminal board, providing a servo valve clamp function upon turbine trip. Both TREL and TRES control the trip solenoids 1 and 2 so that either one can remove the power and actuate the hydraulics to close the steam or fuel valves. ETR3 is set up to supply power to trip solenoid #3. The nine trip relay coils on TRES are supplied with 28 V dc from the I/O controller. The trip solenoids are supplied with 125 V dc (or 24 V dc) through plug J2 and draw up to 1 A with a 0.1 second L/R time constant.

WOC has the largest GE Speedtronic Gas Turbine Control System Replacement Parts stock. We can also repair your faulty boards. WORLD OF CONTROLS can also supply unused and rebuilt backed-up with a warranty. Our team of experts is available round the clock to support your OEM needs. Our team of experts at WOC is happy to assist you with any of your automation requirements. For pricing and availability on any parts and repairs, kindly get in touch with our team by phone or email.

FREQUENTLY ASKED QUESTIONS:

What is a Small Steam Turbine Emergency Trip Board?

The Small Steam Turbine Emergency Trip Board is a critical control panel designed to swiftly shut down a steam turbine in emergencies to prevent damage or unsafe operation.

What are the Main Functions of the Emergency Trip Board?

The primary function is to initiate an emergency shutdown of the steam turbine if certain predetermined conditions are met, such as high vibration, Overspeed, or loss of lubrication.

What Conditions Typically Trigger an Emergency Trip?

Conditions like high vibration levels, overspeed of the turbine, low oil pressure, high bearing temperatures, or other critical parameters can trigger an emergency trip.