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GB/T 18216.3-2021Electrical safety in low voltage distribution systems up to 1 000 V a. c. and 1 500 V d. c. - Equipment for testing, measuring or monitoring of protective measures - Part 3: Loop impedance (English PDF)

交流1000V和直流1500V及以下低压配电系统电气安全防护措施的试验、测量或监控设备第3部分：环路阻抗

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

May 21, 2021

Implementation date

December 1, 2021

Scope

GB/T 18216.3-2021 is the English-translated version of 交流1000V和直流1500V及以下低压配电系统电气安全防护措施的试验、测量或监控设备第3部分：环路阻抗.

GB/T 18216.3-2021 is the Chinese standard "Electrical safety in low voltage distribution systems up to 1 000 V a. c. and 1 500 V d. c. - Equipment for testing, measuring or monitoring of protective measures - Part 3: Loop impedance".

Its scope clause reads: This document specifies the loop impedance setting between the measuring line conductor and the protective conductor, between the line conductor and the neutral conductor, or between the two conductors.

According to the requirements of equipment, the measurement of loop impedance is carried out by the method of loading the test line to measure the voltage drop. Its clauses include generalrequirements); terms and definitions.

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Document preview — GB/T 18216.3-2021

National Standard of the People's Republic of China

Classification: N 20

Issued by: State Administration for Market Regulation, China National Standardization Administration

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
4.1 Overview
4.2 Measurement of loop impedance
4.3 External resistance
4.4 Fault voltage exceeding UL
4.5 Overvoltage
5 Logo and instruction manual
5.1 Logo
5.2 Instruction Manual
6 Test
6.1 Overview
6.2 Work uncertainty
6.3 External resistance
6.4 Fault voltage
6.5 Overvoltage

1 Scope

This document specifies the loop impedance setting between the measuring line conductor and the protective conductor, between the line conductor and the neutral conductor, or between the two conductors.

According to the requirements of equipment, the measurement of loop impedance is carried out by the method of loading the test line to measure the voltage drop.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations

Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to

This document.

GB/T 18216.1-2021 AC 1000V and DC 1500V and below low-voltage power distribution system electrical safety protection measures

Testing, measuring or monitoring equipment Part 1.General requirements (IEC 61557-1.2019, IDT)

IEC 61010-1.2010 AMD1.2016 Safety requirements for electrical equipment for measurement, control and laboratory use Part 1.General

Requirements (Safetyrequirementsforelectricalequipmentformeasurement, controlandlaboratoryuse-Part

1 Generalrequirements)

IEC 61010-2-030.2017 Safety requirements for electrical equipment for measurement, control and laboratory use Part 2-030.with test and

Special requirements for equipment measuring circuits (Safety requirements for electrical equipment for measurement, control, andlaboratoryuse-Part 2-030.Particularrequirementsforequipmenthavingtestingormeasuring circuits)

3 Terms and definitions

The following terms and definitions defined in GB/T 18216.1-2021 apply to this document.

ISO and IEC maintain a terminology database for standardization. The website is as follows.

3.1 Loading

A method of applying a load to a circuit in a power distribution system to cause a voltage drop.

3.2 Loadingequipment

A part of a measuring device that is used to load the circuit under test.

3.3 Test current

The current controlled by the measuring device that causes a voltage drop in the circuit under test. […]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 18216.1-2021Electrical safety in low voltage distribution systems up to 1 000 V a. c. and 1 500 V d. c. - Equipment for testing, measuring or monitoring of protective measures - Part 1: General requirements

IEC 61557 · IEC 61010

Cited by

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