Alstom P14x Protection Relay

A Home Assistant custom integration for Alstom/GE P14x series protection relays (P141, P142, P143, P145) via Modbus TCP.

Supported Devices

• Alstom/GE MiCOM P141
• Alstom/GE MiCOM P142
• Alstom/GE MiCOM P143
• Alstom/GE MiCOM P145

Features

• Real-time sensor readings (current, voltage, frequency, power)
• Binary sensors for relay status and trip indicators
• Button entities for relay control operations
• Configurable via the Home Assistant UI (config flow)

Installation

HACS (Recommended)

1. Open HACS in Home Assistant
2. Click the three dots menu → Custom repositories
3. Add https://github.com/LucMathlin/ha-alstom-p14x with category Integration
4. Search for "Alstom P14x" and install
5. Restart Home Assistant

Manual

1. Copy custom_components/alstom_p14x/ to your Home Assistant config/custom_components/ directory
2. Restart Home Assistant

Configuration

1. Go to Settings → Devices & Services → Add Integration
2. Search for "Alstom P14x"
3. Enter the Modbus TCP host and port of your relay
4. Configure polling interval as needed

Requirements

• Modbus TCP connectivity to the relay
• pymodbus>=3.6.0 (installed automatically)