Features:
- Conditions generator PT and CT signals before they reach EMIO.
- Accepts two three-phase voltage sets and two phase-current measurements.
- Provides one configurable customer analog input alongside instrument-transformer channels.
Open-delta transformer circuits reduce the 115 V rms nominal PT inputs to low-level feedback while maintaining the required phase relationships.
Phase A and C current channels accept either 1 A or 5 A CT secondaries through non-pluggable ring-terminal connections.
Controller calculations combine these conditioned signals to obtain electrical quantities used by regulation, limiting and protection.
Apter Power can help source and supply official manufacturer documentation for the General Electric IS200EPCTG1A Exciter PT/CT Board.
General Electric IS200EPCTG1A Exciter PT/CT Board Manuals, Datasheets, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Maintaining generator-voltage measurements
- Two sets: Dual three-phase inputs support the main and redundant PT measurement paths.
- Input window: Each channel accepts 10-200 V rms with 115 V rms nominal operation.
- Open delta: The transformer arrangement converts three-wire voltage into low-level feedback.
- Long runs: Generator PT cables may extend to 1,000 ft when the permitted conductor is used.
Handling generator-current secondaries
- Measured phases: The standard arrangement samples phase A and phase C.
- Two ranges: Hardware supports either 0-1 A rms or 0-5 A rms CT inputs.
- Terminal style: Non-pluggable blocks accept ring terminals so current circuits cannot be casually unplugged.
- Burden: Each current path presents less than 1 VA to its transformer secondary.
Configuring the customer measurement channel
- Voltage mode: Jumpers can select a bipolar ±10 V dc signal.
- Current mode: The alternative setting accepts a 4-20 mA loop.
- Sampling: EMIO acquires this channel at 2,000 samples per second.
- Accuracy: The analog path performs better than 1% of full scale when correctly configured.
Linking conditioned inputs to control calculations
- Voltage results: PT data supports generator magnitude, frequency, flux and line-voltage values.
- Current results: CT data supplies current magnitude plus active and reactive current components.
- Power functions: Combined phase relationships produce real power and reactive volt-amperes.
- Protection inputs: The same measurements support limiter, regulator and protective control logic.