Basler 9174700100 EL200-7 Excitation Limiter

The Basler 9174700100 (EL200-7) is a dedicated excitation limiter module designed for synchronous generators. This device provides overexcitation protection by limiting the field current to prevent thermal damage to the generator rotor and field windings. The EL200-7 is typically used in conjunction with Basler's DECS and AVR systems to enhance generator protection and stability.

The limiter features precise current sensing and fast response, ensuring that the field current remains within safe limits during grid disturbances or system faults. It includes adjustable settings for pickup level and time delay, allowing coordination with other protection devices. The EL200-7 is housed in a robust enclosure suitable for panel mounting in generator control rooms and substations.

Technical Specifications

• Model: EL200-7 (9174700100)

• Function: Overexcitation limiter (OEL)

• Current sensing: Field current input (0-10 A)

• Pickup range: 0.5-10.0 A (adjustable)

• Time delay: 0.1-30 seconds (adjustable)

• Output contacts: 1 form C (trip or alarm)

• Power supply: 24-240 V AC/DC (universal)

• Accuracy: ±2% of setting

• LED indicators: Power, pickup, trip

• Operating temperature: -40°C to +70°C

• Dimensions: 120 x 80 x 60 mm

• Certifications: CE, RoHS

Functional Features

• Overexcitation protection: Limits field current to prevent rotor overheating.

• Adjustable settings: Pickup and time delay can be field-adjusted.

• Fast response: Quickly detects overexcitation conditions and initiates control action.

• Diagnostic output: Provides status indication via LED and relay contacts.

Typical Applications

• Synchronous generators: Protection against overexcitation in utility and industrial plants.

• Excitation systems: Integrated with DECS or AVR for comprehensive generator control.

• Grid-connected generators: Protection during system disturbances and faults.

Installation and Configuration

Mount the EL200-7 on a panel. Connect the field current input, power supply, and output relay contacts. Configure the pickup level and time delay using the front-panel controls. The LED indicators provide status feedback for power, pickup, and trip conditions.

Compliance

Complies with EMC standards, CE approved, RoHS compliant.

Conclusion

The Basler 9174700100 EL200-7 provides reliable overexcitation protection for synchronous generators, ensuring safe operation and preventing damage to the rotor and field windings.