World Of Controls understands the criticality of your requirement and works towards reducing the lead time as much as possible.
IS200TREGS4B - Turbine Emergency Trip Terminal Board is available in stock which ships the same day.
IS200TREGS4B - Turbine Emergency Trip Terminal Board comes in UNUSED as well as REBUILT condition.
To avail our best deals for IS200TREGS4B - Turbine Emergency Trip Terminal Board, contact us and we will get back to you within 24 hours.
SPECIFICATIONS:
Part Number: IS200TREGS4B
Manufacturer: General Electric
Product Family: TREG – Turbine Emergency Trip
Series: Mark VI
Product Type: Gas Turbine Emergency Trip Terminal Board
Trip Solenoids: 3
Trip Solenoid Voltage: 125 V DC
Trip Relay Coils: 9
Relay Control Supply: 28 V DC
Maximum Solenoid Current: Up to 1 A
Solenoid L/R Time Constant: 0.1 second
Common Mode Voltage Range: ±5 V
MPU Pulse Rate Range: 2 Hz–20 kHz
Board Dimensions: 17.8 cm × 33.02 cm
Operating Temperature: 0–60 °C
Connectors: JX1, JY1, JZ1 and J2
Application: GE Speedtronic turbine control/protection systems
Architecture: TMR
Repair: 3–7 days
Availability: In Stock
Country of Origin: United States
Manual: GEH6421L
IS200TREGS4B is a Turbine Emergency Trip Terminal Board designed and manufactured by General Electric as part of the Mark VI Series used in GE Speedtronic Gas Turbine Control Systems. TREGS4B powers three emergency trip solenoids and is controlled by the I/O controller. Up to three trip solenoids can be connected between the TREG and TRPG terminal boards. TREGS4B provides the positive side of the DC power to the solenoids, and TRPG provides the negative side. The I/O controller provides emergency overspeed protection, emergency stop functions, and controls the 12 relays on TREG, nine of which form three groups of three to vote inputs controlling the three trip solenoids. There are several board types as follows:
In redundant TREG applications, it is typical to find one H3B and one H4B board used together. System repairs must be done with the correct board type to maintain the control power separation designed into these systems. In Mark VIe systems, TREG is controlled by the PPRO pack on SPRO. The PPRO I/O packs plug into the D-type connectors on SPRO. Cables with molded plugs connect TREG to the SPRO board.
OPERATION:
TREG is entirely controlled by the VPRO protection module, and the only connections to the control modules are the J2 power cable and the trip solenoids. 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 TRPG and TREG control the trip solenoids so that either one can remove the power and actuate the hydraulics to close the steam or fuel valves. The nine trip relay coils on TREG are supplied with 28 V dc from the I/O controller. The trip solenoids are supplied with 125 V dc through plug J2 and draw up to 1 A with a 0.1-second L/R time constant.
CONTROL OF TRIP SOLENOIDS:
A separately fused 125 V dc feeder is provided from the turbine control for the solenoids, which energize in the run mode and de-energize in the trip mode. Diagnostics monitor each 125 V dc feeder from the power distribution module at its point of entry on the terminal board to verify the fuse integrity and the cable connection.
Two series contacts from each emergency trip relay (ETR1, 2, 3) are connected to the positive 125 V dc feeder for each solenoid, and two series contacts from each primary trip relay (PTR1,2,3 in TRPG) are connected to the negative 125 V dc feeder for each solenoid. An economizing relay (KE1, 2, 3) is supplied for each solenoid with a normally closed contact in parallel with the current-limiting resistor. These relays are used to reduce the current load after the solenoids are energized. The ETR and KE relay coils are powered from a 28 V dc source from the I/O controller. Each PPRO I/O pack in each of the R8, S8, and T8 sections supplies an independent 28 V dc source.
The 28 V dc bus is current-limited and used for power to an external manual emergency trip contact, shown as E-STOP. Three master trip relays (K4X, K4Y, K4Z) disconnect the 28 V dc bus from the ETR and KE relay coils if a manual emergency trip occurs. Any trip that originates in either the protection module (such as EOS) or the TREG (such as a manual trip) will cause each of the three protection module sections to transmit a trip command over the IONet to the control module, and may be used to identify the source of the trip.
DIAGNOSTICS:
The I/O controller runs diagnostics on the TREG board and connected devices. The diagnostics cover the trip relay driver and contact feedback, solenoid voltage, economizer relay driver and contact feedback, K25A relay driver and coil, servo clamp relay driver and contact feedback, and the solenoid voltage source. If any of these do not agree with the desired value, then a fault is created.
TREG connectors JX1, JY1, and JZ1 have their own ID device that is interrogated by the I/O controller. The ID device is a read-only chip coded with the terminal board serial number, board type, revision number, and the plug location. When the chip is read by the I/O board and a mismatch is encountered, a hardware incompatibility fault is created.
WHY PURCHASE FROM WOC:
WOC maintains the largest inventory of replacement parts for GE Speedtronic Gas Turbine control systems, offering a full range of warranty-backed unused and professionally rebuilt boards, as well as expert repairs for damaged units. Our extensive stock and fast turnaround ensure you can quickly restore your system to full operation with minimal downtime. Whether you require hard-to-find OEM components, emergency replacements, or comprehensive board refurbishment, our highly skilled team is available 24/7 to provide technical guidance and support. We are committed to delivering reliable solutions, transparent pricing, and exceptional customer service, helping you maintain peak performance and safety in your automation systems. For pricing, availability, or to discuss your specific needs, please contact us by phone or email. Our specialists are ready to assist you at any time.
What is GE IS200TREGS4B?
IS200TREGS4B is a Turbine Emergency Trip Terminal Board manufactured by General Electric for the Mark VI turbine control system. It provides power and relay control for emergency trip solenoids used to help protect the turbine during trip conditions.
What are the common failure symptoms of an Emergency Trip Terminal Board?
Common symptoms can include turbine trip circuit faults, failure of an emergency trip solenoid to energize or de-energize correctly, incorrect trip relay feedback, solenoid voltage faults, economizer relay faults, servo clamp faults, and hardware incompatibility alarms.
What should be checked if an emergency trip solenoid does not operate?
First, verify the applicable 125 V DC solenoid supply, feeder fuse, wiring, connectors, and relay contacts. The ETR and PTR relay paths should also be checked because both sides of the solenoid circuit participate in controlling the trip function. The relevant diagnostic status should then be reviewed in the Mark VI control system.
What can cause a solenoid voltage fault on the TREG board?
A solenoid voltage fault may result from a blown feeder fuse, missing 125 V DC supply, loose wiring, damaged connectors, failed relay contacts, an open circuit, or a fault within the terminal board circuitry. Measurements should be performed according to the applicable GE documentation and site safety procedures.
How does the TREG board work with the TRPG board?
TREG and TRPG work together to control the turbine trip solenoids. TREG provides the positive side of the DC supply, while TRPG provides the negative side. Either board can interrupt the solenoid circuit and initiate the hydraulic action required to close the turbine's steam or fuel valves.
