GB/T 24808-2022 PDF English
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Electromagnetic compatibility for lifts, escalators and moving walks - Immunity
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GB/T 24808-2022: PDF in English (GBT 24808-2022) GB/T 24808-2022
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.140.90
CCS Q 78
Replacing GB/T 24808-2009
Electromagnetic compatibility for lifts, escalators and
moving walks - Immunity
(ISO 8102-2:2021, Electrical requirements for lifts, escalators and moving
walks - Part 2: Electromagnetic compatibility with regard to immunity, MOD)
ISSUED ON: MARCH 09, 2022
IMPLEMENTED ON: OCTOBER 01, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3
Introduction ... 6
1 Scope ... 7
2 Normative references ... 7
3 Terms and definitions ... 8
4 Test procedure ... 12
5 Applicability of tests ... 13
6 Evaluation of test results ... 13
7 Information provided to users ... 14
Bibliography ... 24
Electromagnetic compatibility for lifts, escalators and
moving walks - Immunity
1 Scope
1.1 This document specifies the immunity performance criteria and test levels for
apparatus used in lifts, escalators and moving walks which are intended to be
permanently installed in buildings including the basic safety requirements in regard to
their electromagnetic environment. These levels represent essential EMC requirements.
This document refers to EM conditions as existing in residential, office and industrial
buildings.
1.2 This document addresses commonly known EMC related hazards and hazardous
situations relevant to lifts, escalators and moving walks when they are used as intended
and under the conditions foreseen by the manufacturers.
It is assumed that no ports connected to safety circuit only are rated at currents greater
than 100 A.
It is assumed that mobile telephones and radio transmitters used at frequencies and
power of that stated in Table 1 are not placed within 200 mm distance from safety
circuit(s).
1.3 Performance criteria and test levels for apparatus/assembly of apparatus used in
general function circuits do not cover situations with an extremely low probability of
occurrence.
This document does not apply to other apparatus already proven to be in conformity to
the relevant EMC national standard, and not related to the safety of the lift, escalator or
moving walk, such as lighting apparatus, communication apparatus, etc.
This document does not apply to electromagnetic environments such as radio
transmitter stations, railways and metros, heavy industrial plant, and electricity power
stations which need additional investigations.
This document is not applicable to apparatus which were manufactured before the date
of its implementation.
2 Normative references
The contents of the following documents, through normative references in this text,
constitute indispensable provisions of this document. Among them, for dated references,
only the edition corresponding to that date applies to this document. For undated
references, the latest edition (including all amendments) applies to this document.
GB/T 17626.2-2018 Electromagnetic compatibility - Testing and measurement
techniques - Electrostatic discharge immunity test (IEC 61000-4-2:2008, IDT)
GB/T 17626.3-2016 Electromagnetic compatibility - Testing and measurement
techniques - Radiated, radio-frequency, electromagnetic field immunity test (IEC
61000-4-3:2010, IDT)
GB/T 17626.4-2018 Electromagnetic compatibility - Testing and measurement
techniques - Electrical fast transient/burst immunity test (IEC 61000-4-4:2012, IDT)
GB/T 17626.5-2019 Electromagnetic compatibility - Testing and measurement
techniques - Surge immunity test (IEC 61000-4-5:2014, IDT)
GB/T 17626.6-2017 Electromagnetic compatibility - Testing and measurement
techniques - Immunity to conducted disturbances, induced by radio-frequency fields
(IEC 61000-4-6:2013, IDT)
GB/T 17626.11-2008 Electromagnetic compatibility - Testing and measurement
techniques - Voltage dips, short interruptions and voltage variations immunity tests
(IEC 61000-4-11:2004, IDT)
GB/T 17799.1-2017 Electromagnetic compatibility - Generic standards - Immunity
for residential, commercial and light-industrial environments (IEC 61000-6-1:2005,
MOD)
IEC 61000-6-2:2016 Electromagnetic compatibility (EMC) - Part 6-2: Generic
standards - Immunity for industrial environments
CISPR 32:2015+A1:2019 Electromagnetic compatibility of multimedia equipment
- Emission requirements
CISPR 35:2016 Electromagnetic compatibility of multimedia equipment - Immunity
requirements
3 Terms and definitions
For the purpose of this document, the terms and definitions given in GB/T 17799.1-
2017, IEC 61000-6-2:2016 and the following apply.
3.1
Assembly of apparatus
4 Test procedure
4.1 The tests shall be carried out as stated in GB/T 17626.2-2018, GB/T 17626.3-2016,
GB/T 17626.4-2018, GB/T 17626.5-2019, GB/T 17626.6-2017 and GB/T 17626.11-
2008, as appropriate (see Table 1 to Table 7).
An attempt shall be made to maximize susceptibility by varying the position of the test
sample in the test facility.
4.2 Travelling cables or any other cables likely to be more than 5 m long shall be
represented by a sample of at least 5 m long connected to the relevant port for the
purpose of testing for susceptibility.
4.3 It is not always possible to measure the immunity levels for every function of the
apparatus/assembly of apparatus. In such cases, the most critical period of operation
shall be selected.
4.4 The test shall be carried out under a single set of environmental conditions within
the specified operating range of temperature, humidity, air pressure and supply voltage,
unless otherwise indicated in the standards referred to in 4.1.
4.5 All tests shall be carried out in well-defined and reproducible conditions.
4.6 To facilitate testing, assemblies of apparatus may be tested together. However,
where apparatus contain safety circuits, the tests shall prove that the safety circuits
comply with the immunity requirements for all circuits and specific requirements for
safety circuits.
This does not imply that those parts of the whole assembly, which are general function
circuits, need to comply with the safety circuit requirements.
4.7 Tests shall be carried out at the following ports of the apparatus or assembly of
apparatus where they exist:
- enclosure port (see Table 1);
- ports for signal and control lines not crossing system boundaries (see Table 2);
- ports for monitoring and remote alarm systems crossing the system boundaries (see
Table 3);
- input and output D.C. power ports with current rating ≤100 A (see Table 4);
- input and output D.C. power ports with current rating >100 A (see Table 5);
- input and output A.C. power ports with current rating at ≤100 A per phase (see
Table 6);
- input and output A.C. power ports with current rating >100 A per phase (see Table
7).
Note: Current rating is the current for which the apparatus/assembly of apparatus has been designed
for final application.
4.8 The configuration and mode of operation during measurement shall be recorded.
4.9 Test values shall be applied as specified in Table 1 to Table 7, and the performance
criteria shall be met as appropriate. The tests shall be carried out individually as single
tests and in sequence.
4.10 CISPR 35:2016 shall be applied to wired network ports as defined in CISPR
32:2015+A1:2019.
5 Applicability of tests
5.1 The application of tests for evaluation of immunity depends on the type of
apparatus/assembly of apparatus, its configuration, ports, technology and operating
conditions.
5.2 It can be determined from consideration of the electrical characteristics and usage
of a particular apparatus/assembly of apparatus that some of the tests are inappropriate
or unnecessary. In such a case, the decision and justification not to test shall be recorded.
5.3 Where deviations from the test methods specified in 4.1 are applied, such deviations
shall be justified and recorded.
6 Evaluation of test results
6.1 General
The special requirements of the product make it necessary to define precise criteria for
the evaluation of the immunity test results.
The basic safety requirements of the system (lift, escalator or moving walk) are
specified in local standards. For this reason, a performance criterion derived from the
immunity levels of GB/T 17799.1-2017 is deemed sufficient for most functions.
However, for safety circuits, where any malfunction that can produce an unsafe
operating mode cannot be tolerated, higher immunity levels derived from IEC
61000‑6‑2:2016 are stipulated.
If radio equipment is used in combined apparatus/assembly of apparatus, uncontrolled
operation of a transmitter during testing is not allowed.
6.2 Performance criteria
A functional description of the apparatus or assembly of apparatus and a definition of
performance criteria during, or as a consequence of, testing shall be recorded. The
definition of performance criteria shall be based on:
Performance criterion A: The apparatus/assembly of apparatus shall continue to
operate as intended. No degradation of performance or loss of function is allowed below
a performance level specified by its manufacturer, when the apparatus or assembly of
apparatus is used as intended. In some cases, the performance level may be replaced by
a permissible loss of performance. If the minimum performance level or the permissible
performance loss is not specified by the manufacturer, then either of these may be
derived from the product description and documentation and what the user can
reasonably expect from the apparatus or assembly of apparatus.
Performance criterion B: The apparatus/assembly of apparatus shall continue to
operate as intended after the test. No degradation of performance or loss of function is
allowed below a performance level specified by its manufacturer, when the apparatus
or assembly of apparatus is used as intended. In some cases, the performance level may
be replaced by a permissible loss of performance. However, during the test, degradation
of performance is allowed. No change of actual operating state or stored data is allowed.
If the minimum performance level or the permissible performance loss is not specified
by the manufacturer then either of these may be derived from the product description
and documentation and what the user can reasonably expect from the apparatus or
assembly of apparatus.
Performance criterion C: Temporary loss of function is permitted, provided the
function is self-recoverable or can be restored by the operation of the controls.
Performance criterion D: The apparatus/assembly of apparatus and the associated
safety component(s) shall continue to operate as intended. No degradation of
performance or loss of function is allowed other than a failure into a safe mode.
6.3 Enclosure ports of safety circuits
Where a risk assessment demonstrates that the location of a safety circuit can allow a
mobile telephone or emergency services radio transmitter to be placed directly beside
the device, then the enclosure port of the device shall be implemented so that
performance criterion D is satisfied in these conditions.
7 Information provided to users
The manufacturer of apparatus/assembly of apparatus shall provide documentary
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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