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YD/T 1235.2-2002Testing methods for surge protective devices connected to low-voltage distribution systems of telecommunication station/sites (English PDF)

通信局(站)低压配电系统用电涌保护器测试方法

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Issued by

Ministry of Industry and Information Technology

Level / Type

National · Recommended

Issue date

November 8, 2002

Implementation date

November 8, 2002

Scope

YD/T 1235.2-2002 is the English-translated version of 通信局(站)低压配电系统用电涌保护器测试方法.

YD/T 1235.2-2002 is the Chinese standard "Testing methods for surge protective devices connected to low-voltage distribution systems of telecommunication station/sites".

This standard specifies the Communications Authority (station) with a low voltage distribution system surge protector (hereinafter referred to as SPD) of the test method.

This standard applies to Communications Authority (station) low-voltage distribution systems at all levels [low voltage side of distribution transformers, power distribution room and room AC input, each room AC and DC power distribution cabinet (box), etc. ] with a surge protector Quality inspection and evaluation.

Integrated in the device surge protection can be implemented by reference. Issued on 2002-11-08, in force from 2002-11-08.

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Document preview — YD/T 1235.2-2002

National Standard of the People's Republic of China

Classification: K31

1 Scope
2 Normative References
3 Terms and Definitions
4 General Requirements for Tests
4.1 General Requirements
4.2 Test Condition
4.3 Test Waveform
5 Overall Quality Inspection
5.1 Appearance Inspection
5.2 Inspection of Modes of Protection
5.3 SPD Disconnector Inspection
5.4 Alarm Inspection
5.5 Inspection of Capability of Wiring Terminal to Connect Conductor
6 Surge Protection Property Test
6.1 Maximum Continuous Operating Voltage Test
6.2 Basic Measured Limiting Voltage Test
6.3 Test to Determine Voltage Protection Level
6.4 Operating Duty Test
7 Safety Performance Test
7.1 Inspection of Electric Clearance and Creepage Distance
7.2 Test of Enclosure Protection Degree
7.3 Protective Earthing Inspection
7.4 Fire Hazard Test (Glow-wire Test)
7.5 Safety Test for Temporary Overvoltage Failure
7.6 Test of Temporary Overvoltage Withstand Characteristic
7.7 SPD Thermal Stability Test
8 Additional Test of Two-port SPD and One-port SPD Having Separate Input/Output Terminals
8.1 Voltage Drop Test
8.2 Surge Withstand Capability at Load side
8.3 Short-circuit Withstand Capability at Load Side
9 Environmental Applicability Test
9.1 Vibration Test
9.2 High Temperature Test
9.3 Low Temperature Test
9.4 Alternating Humid Heat Test

1 Foreword

YD/T 1235.2-2002 was issued by Ministry of Industry and Information Technology on 8 November 2002 and took effect the same day.

It is one of 2 parts of the YD/T 1235 series.

The YD/T prefix marks a recommended standard. It is not law in itself: it becomes binding when a contract names it, when a regulation or a mandatory standard refers to it, or when a producer declares conformity with it.

2 Scope Preview

This standard specifies testing methods for surge protective devices connected to low-voltage distribution systems of telecommunication stations/sites (hereinafter referred to as "surge protective device"). This standard is applicable to quality inspection and assessment of surge protective device connected to low-voltage distribution system of telecommunication stations/sites at all levels (low-voltage side of distribution transformer, a.c. input end of distribution room and power room, a.c and d.c. distribution cabinet (box) at each machine room). Surge protective device integrated in the equipment may refer to it.

YD/T 1235.2-2002 is filed under Chinese Standard Classification K31, in the field of electrical engineering.

This catalogue holds 2,288 other YD/T standards without an ICS number.

In this catalogue, YD/T standards carry edition years from 1982 to 2026.

3 About this standard

Sector: Telecommunication Industry Standard (Recommended)

Issued by: Ministry of Industry and Information Technology

English translation: about 16 pages (approximate)

Chinese original: about 24,231 characters

4 Related standards

Other parts of this standard:

YD/T 1235.1-2002 — Performance requirements for surge protective devices connected to low-voltage distribution systems of telecommunication stations/sites

Standards on related subjects:

GB/T 7251.1-2023 — Low-voltage switchgear and controlgear assemblies - Part 1: General rules

GB 7251.12-2013 — [GB/T 7251.12-2013] Low-voltage switchgear and controlgear assemblies -- Part 2: Power switchgear and controlgear assemblies

5 Classification and status

Chinese Standard Classification (CCS): K 31

Prefix YD/T: recommended standard.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 16 pages — is available in the English PDF.

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