How to troubleshoot when the main breaker or MCB trips?

First check the 12 output branches for short circuits or overloads using a multimeter. Once cleared, reset the breaker. If tripping persists, verify if total load exceeds the 63A rating. For bench test verification, pinout diagrams, and custom warranty terms, contact our engineering desk via WhatsApp +86 17621197907.

Why are the alarm dry contacts not outputting signals?

Check if the surge module or internal monitoring terminals are loose, test the continuity of the alarm terminals during fault conditions, and verify FSU signal pin assignments. For bench test verification, pinout diagrams, and custom warranty terms, contact our engineering desk via WhatsApp +86 17621197907.

How to handle a red indicator window on the Class C surge protection module?

A red indicator means the internal varistor has degraded due to a surge and lost protection. Disconnect input power immediately and replace with an identical Huawei original surge module. For bench test verification, pinout diagrams, and custom warranty terms, contact our engineering desk via WhatsApp +86 17621197907.

HuaweiModel: ACDB220-63-12B

Huawei ACDB220-63-12B AC Power Distribution Box (220V 63A 12-Way C-Grade SPD)

The Huawei ACDB220-63-12B is a high-reliability single-phase AC power distribution unit designed for telecom sites, integrating a main breaker, 12-way MCB outputs, and a Class C surge protection module.

Pricing is confirmed by project configuration and quantity

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Input Voltage Range: 220V Single-Phase AC
Main Breaker Rating: 63A
Output Branch Circuits: 12-Way MCB Outputs
Surge Protection Level: Class C Surge Protection
Alarm Monitoring Interface: Alarm Dry Contacts
Mounting Form Factor: Standard Rack/Cabinet Mount

What this product is

This equipment acts as the core AC distribution hub for telecom base stations and edge data centers, responsible for safe power distribution, branch circuit protection, and lightning surge suppression.

What problem it solves

Effectively resolves common site issues such as chaotic power distribution, lack of multi-way fine-grained branch control, vulnerability to lightning surges, and absence of remote power alarm monitoring.

Who and where it is for

Widely applicable to standard telecom base stations, indoor distributed server rooms, outdoor integrated cabinets, micro-stations, and edge computing nodes.

Core advantages

High Integration: Built-in 63A main breaker with 12 independent MCB outputs for precise multi-device power distribution.
Class C Surge Protection: Integrated high-performance surge protection module effectively shields against lightning and grid spikes.
Reliable Alarm Integration: Equipped with dry contact alarm outputs for real-time fault reporting to environment monitoring systems.
Carrier-Grade Build: Flame-retardant, high-strength structural design seamlessly fits standard 19-inch racks and outdoor cabinets.

Technical specifications

Key specifications	Value
Input Voltage Range	220V Single-Phase AC
Main Breaker Rating	63A
Output Branch Circuits	12-Way MCB Outputs
Surge Protection Level	Class C Surge Protection
Alarm Monitoring Interface	Alarm Dry Contacts
Mounting Form Factor	Standard Rack/Cabinet Mount

Applications

Outdoor Macro 4G/5G Telecom Power System

Core Optical Transport & Telecom Switching Center

Industrial SCADA & Substation DC Power Supply

Frequently asked questions

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