GB/T 44259-2024Earth-moving machinery - Battery electric hydraulic excavator for plateau tunnels (English PDF)

土方机械高原隧道用纯电动液压挖掘机

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 24, 2024

Implementation date

July 24, 2024

Scope

GB/T 44259-2024 is the English-translated version of 土方机械高原隧道用纯电动液压挖掘机.

China's national standard for battery electric hydraulic excavators built to work inside tunnels on the high plateau. Tunnelling at altitude is the worst place to run a diesel machine: the exhaust has nowhere to go, thin air makes combustion engines lose power and burn dirtier, and ventilating the heading enough to keep a diesel excavator legal is a large share of the cost of the works. A battery machine removes the exhaust from the tunnel altogether, but it inherits its own problems - air that cools electronics and motors poorly, reduced dielectric strength, cold, dust and water - and those are exactly what this document addresses. It sets the parameters, the requirements, the test methods and the inspection rules for excavators whose energy comes entirely from an on-board rechargeable storage system driving an electric motor, for service between 2 000 m and 5 000 m of altitude. It covers safety of the electrical installation, the operator's station, performance, waterproofing and wading, heat balance and battery swapping, and it ends with marking, packaging, transport and storage. It is written for the manufacturers and testing bodies of these machines and for the tunnelling contractors that buy them.

Document preview — GB/T 44259-2024

National Standard of the People's Republic of China

ICS: 53.100
Classification: P 97

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Scope
2 Normative references
3 Terms and definitions
4 Parameters
5 Requirements
6 Test methods
7 Inspection rules
8 Marking, packaging, transport and storage
9 Annex A (informative) Main parameters of electric excavator
10 Annex B (informative) Electric excavator test record sheet

Foreword

This document is the official English translation of GB/T 44259-2024, issued by the State Administration for Market Regulation and the National Standardization Administration on 24 July 2024 and in force from the same date. SAC/TC 334 is in charge of the English translation; in case of doubt about its contents, the Chinese original is authoritative.

The standard was drafted according to the rules of GB/T 1.1-2020. It was proposed by the China Machinery Industry Federation and prepared by SAC/TC 334, the National Technical Committee on Earth-moving Machinery.

Attention is drawn to the possibility that some elements of this standard may be the subject of patent rights; the issuing body is not responsible for identifying them.

1 Scope

This document specifies the parameters, requirements, inspection rules, marking, packaging, transport and storage of battery electric hydraulic excavators for plateau tunnels, and describes the corresponding test methods.

It applies to the manufacturing and testing of hydraulic excavators used in tunnelling conditions in plateau environments, where the operating energy is supplied exclusively by an on-board rechargeable energy storage system and the machine is driven by an electric motor with a maximum operating voltage of Class B voltage.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references only the edition cited applies; for undated references the latest edition applies, including any amendments.

The list runs to some sixty documents and is dominated by the GB/T earth-moving machinery series - safety of hydraulic excavators, operator enclosure environment, field of view, protective structures, braking, noise and vibration - together with the electric-drive and traction-battery standards GB 18384-2020, GB/T 18488, GB/T 37133, GB/T 38943.1-2020, GB/T 38943.3, GB/T 44254, GB/T 44255-2024 and GB/T 44257.1 and .2, the plateau apparatus standard GB/T 20645-2021, and JB/T 5947 for packing. The full list is reproduced in the normative references of this record.

3 Terms and definitions

The terms and definitions of GB/T 6572, GB/T 25602, GB/T 36693 and GB/T 44254 apply, together with the two defined here.

3.1 battery electric hydraulic excavator for plateau tunnels: a hydraulic excavator suitable for working in plateau tunnels, with the operating energy fully supplied by an on-board rechargeable energy storage system and driven by electric motors.

3.2 state-of-charge (SOC): the percentage of actual capacity in a current battery cell, module, pack or system that can be released under the discharge conditions specified by the manufacturer. The definition is taken from GB/T 44254-2024, 3.4.2.1.

4 Parameters

The main parameters of the battery electric hydraulic excavators covered by this document - referred to throughout as electric excavators - are given in the informative Annex A, Table A.1.

5 Requirements

5.1 General requirements. The electric excavator has to be capable of operating normally in tunnel environmental conditions defined as: a non-explosive environment; an altitude between 2 000 m and 5 000 m; an ambient temperature between -30 degrees C and +45 degrees C; and a relative humidity not greater than 95 per cent. The clause continues with the warnings and indications to be displayed in the operator's cab, and with the requirements for safety, the electrical system, the hydraulic system, performance and the operator's station, which are not reproduced here.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 35 pages — is available in the English PDF.

Referenced standards

Normative references

GB 3838-2002 Environmental quality standards for surface water · GB/T 5226.1 Electrical safety of machinery - Electrical equipment of machines - Part 1: General requirements · GB/T 6572 Earth-moving machinery - Hydraulic excavators - Terminology and commercial specifications · GB/T 8419 Earth-moving machinery - Laboratory evaluation of operator seat vibration · GB/T 8499 Earth-moving machinery - Method for locating the centre of gravity · GB/T 8595 Earth-moving machinery - Operator's controls · GB/T 13332 Earth-moving machinery - Hydraulic excavators and backhoe loaders - Methods of determining tool forces · GB/T 14039-2002 Hydraulic fluid power - Fluids - Method for coding the level of contamination by solid particles · GB/T 16935.1-2023 Insulation coordination for equipment within low-voltage supply systems - Part 1: Principles, requirements and tests · GB/T 16937 Earth-moving machinery - Operator's field of view - Test method and performance criteria · GB/T 17921 Earth-moving machinery - Seat belts and seat belt anchorages - Performance requirements and tests · GB/T 19930 Earth-moving machinery - Tip-Over Protection Structure (TOPS) for compact excavators - Laboratory tests and performance requirements · GB/T 19930.2 Earth-moving machinery - Laboratory tests and performance requirements for protective structures of excavators - Part 2: Roll-over protective structures (ROPS) for excavators of over 6 t · GB/T 19932-2005 Earth-moving machinery - Hydraulic excavators - Laboratory tests and performance requirements for operator protective guards · GB/T 19933.2 Earth-moving machinery - Operator enclosure environment - Part 2: Air filter element test method · GB/T 19933.3 Earth-moving machinery - Operator enclosure environment - Part 3: Pressurization test method · GB/T 19933.4 Earth-moving machinery - Operator enclosure environment - Part 4: Heating, ventilation and air conditioning (HVAC) test method and performance · GB/T 19933.5 Earth-moving machinery - Operator enclosure environment - Part 5: Windscreen defrosting system test method · GB/T 20082 Hydraulic fluid power - Fluid contamination - Determination of particulate contamination by the counting method using an optical microscope · GB/T 20178 Earth-moving machinery - Machine safety labels - General principles · GB/T 20418-2011 Earth-moving machinery - Lighting, signalling and marking lights, and reflex-reflector devices · GB/T 20953 Tractors and machinery for agriculture and forestry - Determination of burning behavior of cab interior materials · GB/T 21152 Earth-moving machinery - Wheeled or high-speed rubber-tracked machines - Performance requirements and test procedures for brake system · GB/T 21153 Earth-moving machinery - Units for dimensions, performance and capacities, and their measurement accuracies · GB/T 21155 Earth-moving machinery - Machine-mounted audible travel alarms and forward horns - Test methods and performance criteria · GB/T 21941 Earth-moving machinery - Volumetric ratings for hoe-type and grab-type buckets of hydraulic excavators and backhoe loaders · GB/T 22358 Earth-moving machinery - Preservation and storage · GB/T 22359.1 Earth-moving and building construction machinery - Electromagnetic compatibility (EMC) of machines with internal electrical power supply - Part 1: General EMC requirements under typical electromagnetic environmental conditions · GB/T 25602 Earth-moving machinery - Machine availability - Vocabulary · GB/T 25606 Earth-moving machinery - Product identification numbering system · GB/T 25615 Earth-moving machinery - Determination of emission sound pressure level at operator's position - Dynamic test conditions · GB/T 25622.1 Earth-moving machinery - Operator's manual - Part 1: Contents and format · GB/T 25684.5-2021 Earth-moving machinery - Safety - Part 5: Requirements for hydraulic excavators · GB/T 25685.1 Earth-moving machinery - Field of vision of surveillance and rear-view mirrors - Part 1: Test methods · GB/T 25685.2 Earth-moving machinery - Field of vision of surveillance and rear-view mirrors - Part 2: Performance criteria · GB/T 30965 Earth-moving machinery - Determination of average ground contact pressure for crawler machines · GB/T 32070 Earth-moving machinery - Object detection systems and visibility aids - Performance requirements and tests · GB/T 36693 Earth-moving machinery - Hydraulic excavator - Reliability test procedures, failure classification and evaluation · GB/T 37163 Hydraulic fluid power - Determination of the particulate contamination level of a liquid sample by automatic particle counting using the light-extinction principle · GB/T 38943.1-2020 Earth-moving machinery - Electrical safety of machines utilizing electric drives and related components and systems - Part 1: General requirements · GB/T 38943.3 Earth-moving machinery - Electrical safety of machines utilizing electric drives and related components and systems - Part 3: Particular requirements for self-powered machines · JB/T 5947 Construction machinery - General specifications for packing

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