YD/T 4628-2023
Data center infrastructure verification testing technical specifications (English Version)

Standard No.

YD/T 4628-2023

Language

Chinese, Available in English version

Release Date

2023

Published By

Professional Standard - Post and Telecommunication  CN  /  YD

Latest

YD/T 4628-2023

---

Introduction

Standard Framework and Technology Evolution

This specification is a communications industry standard (YD/T) and belongs to the ICS 33.040.40 classification, applicable to new, renovated and expanded data centers. Its technological evolution is reflected in:

Version	Core changes	Expansion of test dimensions
2020 version	Integration of GB/T 1.1-2020 structural rules	Added L0-L6 seven-stage verification process
2015 version	Establishment of basic framework	Focus on single device testing of electrical system

---

Definition of key terms

N+X redundancy: The system adds X redundant components in addition to meeting basic requirements. Failure of any X component will not affect operation. Typical application case: When the UPS system adopts N+1 configuration, it can still run at full load even if a single unit fails.

Verification test process

Tencent data center implementation case: The installation offset problem of the chiller was discovered during the L2 pre-check phase to avoid subsequent system linkage failures.

1. L0 Factory Inspection Test: Parameter verification before equipment leaves the factory
2. L1 Factory Self-test: On-site functional debugging confirmation
3. L3 Single Equipment Test: Diesel generator needs to complete 110% load test

---

Electrical System Test Points

Equipment Type	Key Indicators	Allowance Deviation
UPS	Switching Time	≤10ms
Transformer	Temperature Rise	≤110℃ (110% load)

Implementation suggestions

• Testing tools: Certified instruments must be used, such as infrared thermal imagers to detect the temperature rise of the connection points of the distribution cabinet
• Issue tracking: It is recommended to adopt a four-party (owner/testing party/rectification party/supervisor) joint signature cancellation system

YD/T 4628-2023 Referenced Document

• GB 50057 Code for design protection of structures against lightning
• GB 50116 Code for design of automatic fire alarm system
• GB 50736 Design code for heating ventilation and air conditioning of civil buildings (explanation)

YD/T 4628-2023 history

• 2023 YD/T 4628-2023 Data center infrastructure verification testing technical specifications

Topics on standards and specifications

Standard and Specification