---
title: Shelly Pro 3EM-400A Relay
date: 2024-09-17T21:38:12Z
modified: 2026-05-11T15:04:34Z
permalink: "https://tech.co.za/product/shelly-pro-3em-400a-relay/"
type: product
status: publish
excerpt: Shelly Pro 3EM-400A (3-Phase Electricity Monitor) Relay With Three 400A Clamps
wpid: 508119
product_brand:
  - Shelly
product_type:
  - simple
product_visibility:
  - featured
product_cat:
  - Accessories
featured_image: "https://tech.co.za/wp-content/uploads/2024/09/Shelly-PRO-3EM-1-625x625-1.jpg"
---

Shelly Pro 3EM-400 is a DIN rail mountable three-phase energy meter. Enhanced with all the gen2 firmware flexibility and LAN connectivity, it provides professional integrators with additional options for end-customer solutions. Shelly Pro 3EM-400 reports accumulated energy as well as instantaneous voltage, current, and power factor per phase in real-time.

- Can measure up to 400 A for each phase and the neutral
- 4 quadrant measurement with multiple connection types
- Accuracy Class B active energy (Compliance with IEC 62053-21 based on manufacturer testing)
- Photovoltaic ready
- Phase sequence error detection (option)
- Optical pulse indication of energy usage
- Measurement accuracy tо 1%
- Stores data in non-volatile memory that can be retrieved for a period of up to 60 days in 1-minute intervals
- Package includes 3 pieces of 400 A Current Transformer