E‑Coord is Windows software for selective coordination of electrical protection devices. It displays and plots time‑current curves, compares melting and clearing I²T for fuses, and supports fuses, circuit breakers, overcurrent relays, and special devices. The program includes cable and transformer damage curves, motor starting curves, and switch settings for electronic breakers, with a large, editable library of devices from virtually all manufacturers. Users can view one‑line diagrams with curve plots, see cursor coordinates while analyzing drawings, and work in English or metric units.

Key Features

Time‑current curve plotting and analysis Visualize protection device behavior.

• Displays and plots time‑current curves for multiple devices.
• Shows cursor coordinates directly on drawings for precise reading.

Fuse I²T comparison Assess thermal let‑through.

• Compares melting and clearing I²T values for all fuses to detect hidden overlaps.

Broad device support Coordinate entire protection schemes.

• Supports fuses, circuit breakers, special devices, and overcurrent relays.
• Provides switch settings for electronic breakers to adjust curves.

System stress and starting considerations Design with equipment limits in mind.

• Includes cable and transformer damage curves.
• Displays motor starting curves for coordination with inrush conditions.

Extensive, editable libraries Keep data current and comprehensive.

• Large library of fuses and circuit breakers from virtually all manufacturers.
• Add, delete, and revise devices in the library as needed.

Documentation and units Clear communication and flexibility.

• Displays a one‑line diagram alongside curve plots.
• Works in English or metric units.

Benefits

Improved selective coordination Reduce nuisance trips and cascading outages.

• Visual and I²T analysis helps identify and resolve curve overlaps.

Faster engineering workflow From selection to documentation.

• Built‑in libraries and one‑line diagram with plots streamline studies and reports.

Design reliability and compliance support Account for real‑world conditions.

• Incorporates motor starting, cable/transformer damage curves, and relay curves to validate protection settings.