This part of GB 5226 is applicable to the application of electrical, electronic and programmable electronic equipment and systems to machines (including agroup of machines working together in a co-ordinated manner), and it is not applicable to the machines portable by hand while working.
Note 1: This part is an general standard and is not intended to limit or inhibit technological advancement.
Note 2: In this part, the term “electrical” includes electrical, electronic and programmable electronic matters (electrical equipment means electrical, electronic and programmable electronic equipment).
Note 3: In the context of this part, the term “person” refers to any individual and includes those persons who are assigned and instructed by the user or his agent(s) in the use and care of the machine in question.
The equipment covered by this part commences at the point of connection of the supply to the electrical equipment of the machine (see 5.1).
Note 4: The requirements for the electrical supply installation in buildings are given in the GB16895/IEC6036 series.
This part is applicable to the electrical equipment or parts of the electrical equipment that operate with nominal supply voltages not exceeding 1000 V for alternating current (A.C.) and not exceeding 1500 V for direct current (D.C.), and with nominal supply frequencies not exceeding 200 Hz.
Note 5: For higher voltages, see GB5226.3.
This part does not cover all the requirements (for example guarding, interlocking, or control) that are needed or required by other standards or regulations in order to protect persons from hazards other than electrical hazards. Each type of machine has unique requirements to be accommodated to provide adequate safety.
This part specifically includes, but is not limited to, the electrical equipment of machines as defined in 3.35.
Note 6: Annex C lists examples of machines whose electrical equipment can be covered by this part of GB 5226.
This part does not specify additional and special requirements that can apply to the electrical equipment of machines that, for example:
– are intended for use in open air (i.e. outside buildings or other protective structures);
– use, process, or produce potentially explosive material (for example paint or sawdust);
– are intended for use in potentially explosive and/or flammable atmospheres;
– have special risks when producing or using certain materials;
– are intended for use in mines;
– are sewing machines, units, and systems (which are covered by GB5226.4);
– are hoisting machines (which are covered by GB5226.2).
Power circuits where electrical energy is directly used as a working tool are excluded from this part of GB5226.
Contents 1 Scope 2 Normative Referances 3 Terms and Definitions 4 General Requirements 4.1 General 4.2 Selection of Equipment 4.3 Electrical supply 4.4 Physical Environment and Operating Conditions 4.5 Transportation and storage 4.6 Handling 4.7 Installation 5 Incoming Supply Conductor Terminations and Devices for Disconnecting and Switching Off 5.1 Incoming Supply Conductor Terminations 5.2 Terminal for connection to the external protective earthing system 5.3 Supply disconnecting (isolating) device 5.4 Devices for switching off for prevention of unexpected start-up 5.5 Devices for disconnecting electrical equipment 5.6 Protection against unauthorized, inadvertent and/or mistaken connection 6 Protection against Electric Shock 6.1 General 6.2 Protection against direct contact 6.3 Protection against indirect contact 6.4 Protection by the use of PELV 7 Protection of Equipment 7.1 General 7.2 Overcurrent Protection 7.3 Protection of Motors Against Overheating 7.4 Abnormal temperature protection 7.5 Protection against supply interruption or voltage reduction and subsequent restoration 7.6 Motor overspeed protection 7.7 Earth fault/residual current protection 7.8 Phase sequence protection 7.9 Protection against overvoltages due to lightning and to switching surges 8 Equipotential bonding 8.1 General 8.2 Protective bonding circuit 8.3 Functional bonding 8.4 Measures to limit the effects of high leakage current 9 Control circuits and control functions 9.1 Control circuits 9.2 Control functions 9.3 Protective interlocks 9.4 Control functions in the event of failure 10 Operator Interface and Machine-mounted Control Devices 10.1 General 10.2 Push-buttons 10.3 Indicator lights and displays 10.4 Illuminated push-buttons 10.5 Rotary control devices 10.6 Start devices 10.7 Emergency stop devices 10.8 Emergency switching off devices 10.9 Enabling control device 11 Control gear: location, mounting, and enclosures 11.1 General requirements 11.2 Location and mounting 11.3 Degrees of protection 11.4 Enclosures, doors and openings 11.5 Access to controlgear 12 Conductors and cables 12.1 General requirements 12.2 Conductors 12.3 Insulation 12.4 Current-carrying capacity in normal service 12.5 Conductor and cable voltage drop 12.6 Flexible cables 12.7 Conductor wires, conductor bars and slip-ring assemblies 13 Wiring practices 13.1 Connections and routing 13.2 Identification of conductors 13.3 Wiring inside enclosures 13.4 Wiring outside enclosures 13.5 Ducts, connection boxes and other boxes 14 Electric motors and associated equipment 14.1 General requirements 14.2 Motor enclosures 14.3 Motor dimensions 14.4 Motor mounting and compartments 14.5 Criteria for motor selection 14.6 Protective devices for mechanical brakes 15 Accessories and lighting 15.1 Accessories 15.2 Local lighting of the machine and equipment 16 Marking, warning signs and reference designations 16.1 General 16.2 Warning signs 16.3 Functional identification 16.4 Marking of equipment 16.5 Reference designations 17 Technical documentation 17.1 General 17.2 Information to be provided 17.3 Requirements applicable to all documentation 17.4 Installation documents 17.5 Overview diagrams and function diagrams 17.6 Circuit diagrams 17.7 Operating manual 17.8 Maintenance manual 17.9 Parts list 18 Verification 18.1 General 18.2 Verification of conditions for protection by automatic disconnection of supply 18.3 Insulation resistance tests 18.4 Voltage tests 18.5 Protection against residual voltages 18.6 Functional tests 18.7 Retesting Annex A Annex B Annex C Annex D Annex E Annex F Annex G Bibliography Index
