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
