IS200ECTBG1A GE EX2100, EXCITER CONTACT TB, TMR

Description:

FUNCTIONAL OVERVIEW:

The IS200ECTBG1A, an Exciter Contact Terminal Board produced by General Electric for the EX2100 Series, is integral to the excitation control systems of GE's gas turbines. It caters specifically to the excitation contact inputs and outputs within the EX2100 Excitation Control framework. This board comes in two versions tailored for different control schemes: the ECTBG1 variant for redundant controls and the ECTBG2 version suited for simplex controls. Each variant incorporates dual trip outputs that activate customer lockout mechanisms overseen by the EMIO board, which also governs four versatile Form-C contact outputs.

The ECTB board supervises six auxiliary contacts energized at 70 V DC, inclusive of monitoring and power provision for the 52G and 86G contacts. In redundant setups, both M1 and M2 controllers supply the necessary power.

TRIP RELAY ACTIVATIONS:

Two trip relays, commonly serving as customer lockout actuators, are orchestrated by the ECTBG2 under the guidance of the EMIO connected to M1. These relays, designated K1M1 and K2M1 on the board, draw their 24 V DC driving force from the M1 controller. The Simplex Terminal Board illustration references the ECTBG2 configuration. Each relay engages a separate customer lockout through a pair of normally closed contacts in parallel. A 2-out-of-3 contact voting mechanism among three inputs ensures enhanced reliability in conjunction with the ECTBG1 during redundancy operations.

VERSATILITY IN RELAY OUTPUTS:

Four general-purpose relay outputs fall under the purview of the ECTBG2, with each driven by a 24 V DC supply from the M1 controller. These Form-C type relays feature common, normally open, and normally closed terminals, typically interfacing with customer-supplied 125 V DC circuitry. Labels K1GP through K4GP denote these relays on the board. A unified input signal steers all three into a singular relay driver coil, facilitating redundancy alongside the ECTBG1.

CONTACT INPUT UTILIZATION:

Irrespective of whether in simplex or redundant modes, contact inputs serve analogous roles, albeit in redundant scenarios they fan out to controllers M1, M2, and C. Conversely, only M1 connects in simplex configurations. The ECTB diligently monitors six customer-provided auxiliary contacts, utilizing a 70 V DC source from designated plugs (J13M1, J13M2) equipped with resistor isolation. A wetting voltage spectrum of 63 to 84 V DC is accommodated, with the contact states monitored via a visual indicator—a red LED illuminated by the resultant signal cascading across M1, M2, and C controllers.

INSTALLATION DETAILS:

Securing the terminal blocks TB1 and TB2 involves just two screws, enabling easy removal when needed. Connection to the EBKP backplane and subsequent linkage to the EMIO boards (M1, M2, C) is achieved through three 25-pin sub-D connectors labeled J405, J408, and J415. Power for contact wetting, crucial for operation, is channeled through plugs J13M1 and J13M2 originating from the M1 and M2 power supplies.

Datasheet Link:

IS200ECTBG1A GE EX2100, EXCITER CONTACT TB, TMR PDF Datasheet