Product Introduction

About the IS215VPROH2BC
The IS215VPROH2BC model is designed to be used as both a turbine emergency trip board and a turbine protection board. It is primarily used as an input/output processor board for the TPRO and TREG boards. The TREG board is the model used when the VPRO interfaces with the turbine emergency trip board. The TPRO model is used in conjunction with the VPRO for turbine protection applications. The Mark VI Turbine Control System series includes this IS215VPROH2BC Turbine Emergency Trip Board, which, as their name suggests, have specific possible applications in the control and management systems of General Electric compatible gas, steam and wind turbine automatic drive components. This must be described as a considerable functional upgrade over the previous industry standard Mark V Turbine Control System series (nearly the same full extended series name), as the Mark VI series adds the increasingly important alternative energy based wind turbine possible functional environment to the basic gas and steam based setup seen with the early introduction of the Mark V.

Hardware Tips and Specifications
When the VPRO model is used with a TREG board, the I/O signal types include energy saving relays, emergency stop inputs, trip interlock inputs, and trip solenoid valve drivers. Each processor also has a certain number of I/Os. For example, each available TREG board has seven trip interlock inputs and three trip solenoid valve drivers. Note that when the IS215VPROH2BC model is operating as a turbine emergency trip processor board, it is also capable of connecting to the TPRO terminal board via an Ethernet cable. When the IS215VPROH2BC board is used in a protection module application, the main purpose is to ensure that the selected turbine does not experience any type of overspeed. One thing to note when operating this model is that it will always have triple redundancy and will have three completely independent and separate sections named X, Y, and Z. This model is capable of shutting down one of the sections while the turbine is operating without endangering the protection system. Note that the VPRO board has its own onboard power supply that can generate five to twenty-eight volts DC from the one hundred and twenty-five volts DC taken from the cabinet PDM.

While this may be true, the Mark VI series of this IS215VPROH2BC Turbine Emergency Trip Board device is actually relatively well contextualized online in a plethora of original related instruction manual materials. Firstly, this IS215VPROH2BC Turbine Emergency Trip Board device has an average solenoid response time of 0.1 seconds, which of course has to do with the numerous trip solenoid components provided on the base printed circuit board of this IS215VPROH2BC Turbine Emergency Trip Board device. In addition to this, this IS215VPROH2BC Turbine Emergency Trip Board product uses a trip solenoid circuit rated to NEMA Class E creepage rating, capable of clearing a maximum fuse voltage rating of 15 A in the process. Unfortunately, this IS215VPROH2BC Turbine Emergency Trip Board cannot be defined as an original development product for its specific GE Mark VI Turbine Control System family functional product role, as it must be emphasized that the IS215VPROH2 parent turbine emergency trip board did not utilize the dual important revision table of this IS215VPROH2BC Turbine Emergency Trip Board product.

The IS215VPROH2B is a turbine protection board manufactured and designed by General Electric, belonging to the Mark VI series used in GE Speedtronic gas turbine control systems. The turbine protection board (VPRO) and associated terminal boards (TPRO and TREG) provide an independent emergency overspeed protection system. The protection system consists of three redundant VPRO boards located in a module separate from the turbine control system, which control the trip solenoid valves through the TREG.

The VPRO board in the protection module
provides the emergency trip function. Up to three trip solenoid valves can be connected between the TREG and TRPG terminal boards. TREG provides the positive 125 V DC to the solenoids and TRPG provides the negative. Either board can trip the turbine. VPRO provides emergency overspeed protection and emergency stop functions. It controls 12 relays on TREG, 9 of which form three groups of 3 to vote on the inputs of the three trip solenoids. The second TREG board can be driven from the VPRO via J4.

Installation:
Close the VME processor I/O rack.
After positioning the edge connector by hand, slide the VPRO board into place.
Tighten the retaining screws at the top and bottom of the front panel.
Open the VME rack and check the diagnostic lights on the top of the front panel.

The primary purpose of the protection module is to provide emergency overspeed (EOS) protection for the turbine, using three VPRO boards. In addition, the VPRO has backup synchro-check protection, three analog current inputs, and nine thermocouple inputs, primarily for gas turbine exhaust overheat protection.

The protection module is always triple redundant, with three completely independent VPRO boards named R8, S8, and T8 (originally named X, Y, and Z). Any of these boards can be shut down and replaced while the turbine is running without compromising the protection system. Each board contains its own I/O controller. Communications allow test commands to be issued from the controller to the protection module, and monitoring of the EOS system diagnostics in the controller and operator interface. Communications reside on the VPRO board, which is the heart of the system. The VPRO board has a VME interface, allowing programming and testing in a VME rack; however, the backplane is neutralized when the protection module is inserted to eliminate any continuity between the three independent sections.

Speed ​​Control and Overspeed Protection:
Speed ​​control and overspeed protection are implemented with six passive magnetic speed sensors. The first three sensors are monitored by the controller, which uses the median signal for speed control and primary overspeed protection. The last three sensors are connected to the R8, S8, and T8 VPROs in the protection module, respectively. Nine passive magnetic speed sensors or active pulse rate sensors (TTL type) are provided on the TPRO terminal board, three of which are monitored by the R8, S8 and T8 VPROs respectively. Separate overspeed trip settings are programmed in the application software for the main and emergency overspeed trip limits, and a second emergency overspeed trip limit must be programmed in the I/O Configurator to confirm the EOS trip point.

Power Supply:
Each VPRO board has an onboard power supply. Using the 125 V DC from the cabinet PDM, 5 V and 28 V are generated. Therefore, for greater reliability, the complete protection module contains three power supplies. The J2 power cable and trip solenoid valve are the only connections to the control module, as the VPRO is only responsible for controlling the TREG. When the turbine trips in a simplex system, the third cable transmits the trip signal from J1 to the TSVO terminal board, operating the servo valve clamp.

FAQs about IS215VPROH2BC
Are the two revisions of this IS215VPROH2BC Turbine Emergency Trip Board PCB product backward compatible?

Yes. Given that they are both functional Mark VI series revisions, the revisions of this IS215VPROH2BC Turbine Emergency Trip Board PCB are backward compatible.
What does the conformal PCB protective coating consist of?

The conformal PCB coating for this IS215VPROH2BC Turbine Emergency Trip Board PCB is a thin chemically applied PCB protective layer that can be applied to the entire base circuit board of this IS215VPROH2BC Turbine Emergency Trip Board PCB.

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