Some standard content:
GB16754-1997
This standard is equivalent to the international standard ISO/IEC13850:1995 "Machinery Safety - Emergency Stop - Design Principles". The differences from ISO/IEC13850 are as follows: 1. The introduction of "referenced standards" is written in accordance with the provisions of GB/T1.1, and the two ISO technical reports and two IEC standards cited in the original standard are changed to the corresponding national standards. Corresponding changes have also been made to the relevant referenced standards in the technical elements of the standard. 2. The note "The standards for electrical emergency stop devices are formulated by IEC/SC17B" in 3.2 of the international standard has been cancelled. Appendix A of this standard is a prompt appendix.
This standard has been implemented since September 1, 1997. This standard is proposed and managed by the National Technical Committee for Machinery Safety Standardization. The responsible drafting unit of this standard: Machinery Standardization Research Institute of the Ministry of Machinery Industry. Participating drafting units: Beijing Construction Machinery Comprehensive Research Institute of the Ministry of Construction.
The main drafters of this standard are Ma Xianzhi, Li Qin, Zhang Meijia and Guo Ting. 4.5
GB 16754--1997
ISO/IEC Foreword
1) IEC (International Electrotechnical Commission) is a worldwide standardization organization including all national electrotechnical technical committees (IEC national committees). ISO (International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The stated objective of IEC is to promote international cooperation on various issues related to standards in the electrical and electronic fields. In addition to various other activities, ISO and IEC also publish international standards. The formulation of international standards is entrusted to technical committees; any ISO member body or IEC national technical committee interested in the project may participate in the work of the project. International, governmental and non-governmental organizations in contact with ISO or IEC may also participate in the formulation of the project. ISO and IEC cooperate closely under the conditions determined by the agreement between the two organizations. 2) ISO and IEC formal resolutions or agreements on technical matters, drawn up by technical committees in which all ISO member bodies and IEC national committees with a particular interest in the matter participate, express, as far as possible, international consensus on the issues involved. 3) There are recommended formats for international publications in the form of standards, technical reports or guidelines, and they have been accepted by the countries where ISO member bodies and IEC national committees are located. 4) In order to promote international unification, ISO member bodies and IEC national committees undertake the task of applying ISO/IEC international standards to the greatest extent possible in their countries and regions. Any differences between ISO/IEC standards and corresponding national or regional standards should be clearly pointed out in the latter.
International Standard ISO/IEC13850 was developed by IEC/TC44\Industrial Machinery-Electrical Equipment" and ISO/TC199\Safety of Machinery". The standard is based on EN418:1992. EN418 was developed by CEN/TC114 and CENELEC44X. Joint Working Group 9 of CEN/TC114-CIC/TC44X was entrusted by CEN/TC114 to develop standards for emergency stop, prevention of unexpected start, disconnection, and energy dissipation.
This standard is a cross-industry general standard that can be used as a reference standard for ISO and IEC technical committees developing standards for certain types of machine products and/or special machine products. In the absence of a certain type of product standard or a special product standard, the requirements of this standard can also be used by suppliers. In the absence of a certain type of product standard or a special product standard, its requirements can take precedence. In the United States, non-engaging emergency stop devices with separate reset devices have been approved for practical use. Appendix A is a suggestive appendix.
The text of this international standard is based on the documents in the table below. DIS
IEC 44(CO) × ×
ISO/TC 199NYY
Voting Report
IEC 44(CO)X × ×
ISO/TC199NYYY
Full information on the voting for this standard can be found in the voting report indicated in the table above. 46
1 Scope
National Standard of the People's Republic of China
Safety of machinery--Emergency stop-Principles for design
GB 16754-1997
eqvISO/IEc13850:1995
This standard specifies the requirements and design principles for emergency stop functions that are independent of the form of energy used in the control function. This standard applies to all machinery except the following two categories of machinery: machines where the emergency stop function cannot reduce the risk; hand-held machines and hand-guided machines.
This standard does not cover functions such as reversing, limiting movement, deflection, shielding, braking or disconnection, which may be part of the emergency stop function. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T15706.1-1995 Basic concepts and general principles for mechanical safety and design Part 1: Basic terms and methodology GB/T15706.2-1995 Basic concepts and general principles for mechanical safety and design Part 2: Technical principles and specifications GB5226.1-1996 Electrical equipment of industrial machinery Part 1: General technical conditions GB14048.5-93 Low-voltage switchgear and control equipment Control circuit electrical appliances and switching elements Part 1: Electromechanical control circuit electrical appliances
3 Definitions
This standard uses the following definitions.
3.1 Emergency stop (function) Emergency stop (function) The intended function of the emergency stop is:
- Avoiding or reducing the existence of various dangers to people, machinery or work in progress; triggered by the actions of a person.
The dangers referred to in this standard may arise from the following situations: - Functional disorders such as mechanical failure, unqualified performance of processed materials, human errors), - Normal operation.
See Figure 1 for a graphical representation of the emergency stop function.
3.2 Emergency stop device Emergency stop device A manual control device used to activate the emergency stop function. 3.3 Machine actuator A power mechanism used to make a machine move. Approved by the State Administration of Technical Supervision on March 6, 1997, and implemented on September 1, 1997
4 Safety requirements
People are aware of the need for emergency stop
Emergency stop starts
Not running
(Stop state)
4.1 General requirements
GB 16754--1997
Emergency stop reset
Machinery may restart
Emergency stop function
Graphical representation of emergency stop function
4.1.1 In all operating modes of the machine, the emergency stop function shall take precedence over all other functions without impairing the function of any facilities designed to relieve people in danger. Until the emergency stop function is reset, any start command (intended, unintended or accidental) shall be invalid.
Note: When the emergency stop device may be located separately (e.g. a portable pendant control panel) or the machinery may be partially isolated, care should be taken to avoid confusion between operating and inoperative control devices.
4.1.2 The emergency stop function should not be used to replace safety guards and other main safety functions, but should be designed as a supplementary measure (e.g. in the event of failure).
4.1.3 The emergency stop function should not impair the effectiveness of guards or devices with other main safety functions. Note: For this purpose, it is necessary to ensure the continuous operation of auxiliary equipment such as magnetic chucks or braking devices. 4.1.4 Based on risk assessment, the emergency stop function should be designed so that after the emergency stop device is activated, the running machine stops in an appropriate manner without creating additional risks.
Note: The so-called "stopping in an appropriate manner" may include: selecting the most appropriate deceleration rate;
selecting the stop category (see 4.1.5);
applying the predetermined stop sequence.
4.1.5 The emergency stop shall have the function of a Category 0 stop or a Category 1 stop (see 9.2.2). Note: Category 0 and Category 1 stops involve the removal of the power source to the machine's actuating mechanism. Examples of power removal include:
cutting off the power to the motor;
disconnecting the moving element associated with the mechanical energy source; interrupting the fluid power supplied to the piston/sliding valve. The selection of the emergency stop category should be determined by a risk assessment of the machine (see 9.2.5.4 of GB/T5226.1-1996). 4.2 Specific requirements for emergency stop of electrical equipment
For specific requirements for emergency stop of electrical equipment, see 9.2.2, 9.2.5.4 and 10.7 of GB/T5226.1-1996. 4.3 Operating conditions and environmental influences
The selection, assembly, connection and protection of components and elements used to implement the emergency stop function [see Appendix A (suggestive appendix) should enable them to operate correctly under the expected conditions of use and environmental influences. In this process, the following should be considered: the frequency of operation and the need for periodic testing in cases of infrequent use; the effects of vibration, shock, temperature, dust, foreign matter, moisture, corrosive substances, fluids, etc. 4.4 Requirements for emergency stop devices 4.4.1 Emergency stop devices should be designed to facilitate operation by the operator and other persons who may need to operate them. The types of manipulators that can be used include: m-mushroom-type buttons; wires, ropes, rods; handles; foot pedals without protective covers in specific applications. 4.4.2 Emergency stop devices should be located at each operator control station and other locations where emergency stops are required. They should be configured in easily accessible locations and there should be no danger to the operator and persons who may operate them. Note: Measures to prevent misoperation should not impair accessibility. 4.4.3 The emergency stop device must adopt the principle of forced mechanical action (see 3.5 of GB/T15706.2-1995). Note: The application of an electrical contact emergency stop device with a positive disconnection operation is an example of the application of this principle. According to 3.1.2 of the third part of GB14048.5-93, the positive disconnection operation (of the contact element) is achieved by the direct result of the specific movement of the switch operator of a non-elastic element (such as not relying on a spring).
4.4.4 After the emergency stop device is operated to generate an emergency stop command, the command must be maintained by the engagement (locking) of the drive device until the emergency stop device is readjusted (disengaged). The emergency stop device should not be able to engage when no emergency stop command is generated. In the event that the emergency stop device (including the engagement measures) fails, the generation of an emergency stop command must take precedence over the engagement measures. 4.4.5 The readjustment (disengagement) of the emergency stop device should only be possible manually on the emergency stop device. When the emergency stop device is readjusted, it shall not generate a restart command by itself. It shall not be possible to restart the machine until all the emergency stop devices that have been operated have been reset. 4.4.6 The operator of the emergency stop device shall be coloured red. If there is a background, it shall be coloured yellow. When a wire or rope is used, a flag may be attached to it to improve its visibility.
In addition, in some cases, the following emergency stop sign may be provided: Note: For electrical equipment, see also 10.2.1 of GB/T5226.1--1996. 4.5 Additional requirements when wires and ropes are used as operators 4.5.1 Consideration shall be given to:
The deflection required to generate the emergency stop command;
The maximum possible deflection;
The minimum gap between the wire or rope and the nearest object; -The force to be applied to the wire or rope in order to operate the emergency stop device; -Enabling the operator to see the wire or rope (e.g. by using a flag). 4.5.2 In the event that the wire or rope is disconnected or detached, the emergency stop command shall be automatically generated. In special applications (such as in open-pit mines) this requirement may be difficult to comply with, in which case other safety measures need to be selected. 4.5.3 The facilities for re-adjusting the emergency stop device should be arranged so that the full length of the wire or rope can be seen from the re-adjustment facility. If this is not feasible, the operating instructions should state that after the emergency stop device is activated, the machine should be checked along the full length of the wire or rope before re-adjustment to find out the principle of action.
① Emergency stop device.
Signaling device,
display, alarm
GB16754--1997
Appendix A
(Suggestive Appendix)
Components and elements used to realize the emergency stop function Human-machine interface
Manipulator
Manual operating device
Data storage and logic circuit or analog data processing Sensor, protective device
Power control element (such as contactor
, valve, speed controller)
Machine actuating mechanism
(such as motor, cylinder)
Disconnecting device (such as clutch),
Brake
Power transmission element
Working part
Protective device
:8888898
②The part of the control system intended for processing emergency stop commands. ③ Power control elements (contactors, valves or speed controllers), disconnect devices (clutches, etc.) and brakes for emergency stops (they are also used for normal operation of the machine).3. The facility for re-adjusting the emergency stop device should be arranged so that the full length of the wire or rope can be seen from the re-adjustment facility. If this is not feasible, the instruction manual should state that after the emergency stop device is activated, the machine should be checked along the full length of the wire or rope before re-adjustment to find out the operating principle.
① Emergency stop device.
Signaling device,
display, alarm
GB16754--1997
Appendix A
(Suggestive Appendix)
Components and elements used to realize the emergency stop function Human-machine interface
Manipulator
Manual operating device
Data storage and logic circuit or analog data processing Sensor, protective device
Power control element (such as contactor
, valve, speed controller)
Machine actuating mechanism
(such as motor, cylinder)
Disconnecting device (such as clutch),bzxz.net
Brake
Power transmission element
Working part
Protective device
:8888898
②The part of the control system intended for processing emergency stop commands. ③ Power control elements (contactors, valves or speed controllers), disconnect devices (clutches, etc.) and brakes for emergency stops (they are also used for normal operation of the machine).3. The facility for re-adjusting the emergency stop device should be arranged so that the full length of the wire or rope can be seen from the re-adjustment facility. If this is not feasible, the instruction manual should state that after the emergency stop device is activated, the machine should be checked along the full length of the wire or rope before re-adjustment to find out the operating principle.
① Emergency stop device.
Signaling device,
display, alarm
GB16754--1997
Appendix A
(Suggestive Appendix)
Components and elements used to realize the emergency stop function Human-machine interface
Manipulator
Manual operating device
Data storage and logic circuit or analog data processing Sensor, protective device
Power control element (such as contactor
, valve, speed controller)
Machine actuating mechanism
(such as motor, cylinder)
Disconnecting device (such as clutch),
Brake
Power transmission element
Working part
Protective device
:8888898
②The part of the control system intended for processing emergency stop commands. ③ Power control elements (contactors, valves or speed controllers), disconnect devices (clutches, etc.) and brakes for emergency stops (they are also used for normal operation of the machine).
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