IS200ESELH2AA - Exciter Selector Board

IS200ESELH2AA - Exciter Selector Board IS200ESELH2AA - Exciter Selector Board

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Part No: IS200ESELH2AA
Manufacturer: General Electric
Product Type: Exciter Selector Board
Function: Help Fire Gate-Firing SCRs
Series: EX2100
Availability: In Stock
Weight: 2.00 lbs
Dimensions: 19.00 x 12.50 x 3.50
Country of Origin: USA
Manual: GEI-100456


IS200ESELH2AA is an Exciter Selector Board manufactured and designed by General Electric and is part of the EX2100 Series used in Excitation turbine control systems. The associated master I/O (EMIO) board sends six logic level gate pulse signals to the Exciter Selector Board (ESEL), which is mounted in the control rack. The exciter gate pulse amplifier (EGPA) boards are connected to six sets of wires using the pulse signals that are then dispersed throughout the system. The Power Conversion Cabinet houses the mounted EGPA boards. The primary function of the Exciter Selector Board is to accept logic-level pulse signals from the associated EMIO board. The EMIO board will then transmit the pulse signals to up to six sets of cables, which will distribute them to exciter gate pulse amplifier (EGPA) boards to assist in the gate-firing of SCRs.

There are three ESEL board groups that can support rising redundancy levels:

� One PCM is controlled by a single bridge driver in ESELH1.

� Three bridge drivers in ESELH2 are in charge of three PCMs.

� Six bridge drivers in ESELH3 are in charge of six PCMs.


For simplex systems, only one ESEL is required; however, two ESELs are provided if redundancy control or online repair is desired. Which controller, M1 or M2, is in use as indicated by controller C can decide whether ESEL 1 or ESEL 2 is active. Look at the illustration below. Invariably, M1 powers ESEL 1, and M2 powers ESEL 2. The default controller is M1.

ESEL Connection Diagram

Fig 1: ESEL Connection Diagram


Six gating commands are directed by the selectors under the direction of C from either M1 or M2. The active master provides all of the power necessary to control the six GPAs. The final product correctly fans out all six commands from either M1 or M2, but never both at once. The other fan-out circuits are unaffected if one fan-out circuit malfunctions.


There are no test points or jumpers on the board. Since the individual pin signals on connectors P1 and P2 are not often tested during troubleshooting, they are not defined in this document. They connect to the VME backplane.

WOC maintains the largest inventory of replacement parts for GE Excitation control systems. Additionally, we offer warranty-backed unused and rebuilt boards as well as board repairs for your damaged ones. For your OEM needs, our team of professionals is available around-the-clock. We at WOC are happy to help you with any needs you may have in terms of automation. Please contact our team by phone or email for pricing and availability on any components and repairs.


What is the World of Controls?

WOC is the global supplier of genuine GE Speedtronic, GE Excitation parts, LCI, LS2100, GE Innovation Series Controllers, GE Drives, and Bently Nevada Monitoring Systems.

What are the Services that WOC offers?

WOC offer services such as Repairs, Test with Certifications, Exchange schemes, Training, Field Service, Troubleshooting, Health Checks, HMI Upgrade, Refurbishment of Circuit Boards, Annual maintenance and Supply, Operating Support System, EPROM backups, and Warranties. Moreover, We have a buy-back facility for parts, ranging from minor parts to the entire control system panel. We have an in-house lab for repairs, as well as testing facilities on site.

Is WOC an Authorized Distributor For the Main Manufactures?

WOC is not an authorized distributor but an OEM Supplier.