The GE IS200ESELH1A IS200ESELH1AAA manages field excitation for synchronous generators. This board controls the DC current flowing to the generator rotor windings. Therefore, it regulates output voltage and reactive power delivered to the grid.
Product Overview
We built this exciter board for reliable field control in power generation applications. Its dual-channel design provides redundancy for critical excitation functions. Moreover, this unit includes built-in protection against over-excitation and loss of field.
Technical Specifications
| Parameter | Specification |
|---|---|
| Dimensions | 30.5 cm (length) x 20.3 cm (width) |
| Weight | 0.92 kg (approximately 2.03 lb) |
| Interface Type | Dual 64-pin backplane connectors plus front test points |
| Component Count | 284 components including dual microcontrollers and gate drives |
| Energy Storage | 8 aluminum capacitors (1000 µF, 50V) plus 22 ceramic |
| Processor Cores | Main and redundant 32-bit at 40 MHz each |
| Control Method | PID with feed-forward and power system stabilizer |
| Output Type | Phase-controlled SCR gate pulses |
| Field Voltage | 0 to 600V DC nominal |
| Field Current | 0 to 2000A depending on external SCR stack |
| Response Time | 10 ms for 95% voltage change |
| Protection | Loss of field, over-excitation, volts/hertz |
Dual-Processor Architecture
The GE IS200ESELH1A IS200ESELH1AAA uses two independent processor cores. The main processor handles voltage regulation and reactive power control. The redundant processor monitors the main processor’s outputs continuously. It takes over immediately if the main processor fails. Therefore, the excitation system never loses control of the generator field.
Energy Storage Array
Eight aluminum capacitors provide hold-up for the gate drive power supply. Twenty-two ceramic capacitors decouple noise from all power and reference rails. These capacitors maintain stable firing angles during AC line distortions. Clean power ensures precise SCR firing for smooth field current control. Consequently, the generator produces clean voltage without harmonic distortion.
Control Features
This exciter implements automatic voltage regulation as its primary mode. It also supports manual field current control for commissioning purposes. The power system stabilizer dampens low-frequency oscillations on the grid. Additionally, the volts/hertz limiter prevents transformer core saturation. You can enable or disable each function through configuration software.
Installation Steps
Insert this board into the designated exciter slot in the control rack. Align the GE IS200ESELH1A IS200ESELH1AAA with both backplane connectors. Push the board evenly until both ejector levers lock into place. Then tighten all four corner screws for vibration resistance. Connect external field wiring through the front terminal block.
Field Current Sensing
The board accepts input from external Hall effect current transducers. These sensors provide isolation between the high-power field and control circuits. The exciter compares actual field current against the reference value. A differential amplifier processes the transducer signal for noise rejection. Calibrate the transducer scaling during initial system commissioning.
Protection Functions
Loss of field protection trips the generator breaker within 100 ms. Over-excitation protection limits field current to 110% of nominal. Under-excitation protection prevents stability loss at light loads. The volts/hertz limiter reduces excitation during low-speed operation. All protection setpoints are programmable through the maintenance interface.
Application Scope
This exciter board suits steam, gas, and hydro turbine generators. Many utility power plants use the GE IS200ESELH1A IS200ESELH1AAA in their excitation systems. Its redundant design qualifies for critical power generation applications.
Details
| Weight | 0.1 kg |
|---|---|
| Dimensions | 25 × 108 × 127 mm |
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