GB 9159-2008Safety requirements for radio transmitting equipment (English PDF)

3.1

The necessary knowledge and practical experience in electrical and radio engineering, may occur when working on the understanding of radio transmission equipment All kinds of hazards, and to take appropriate measures to ensure the safety of people.

Given evaluation criteria qualified person skilled in Appendix C.

Note: The evaluation criteria defined above and Appendix C, knowledge specifies the minimum requirements for a skilled person, in some countries provides for more stringent Qualifications, training and experience, must hold an official certificate.

3.2

A member, or if the radio does not cause skin burns hazardous electrical shock, the member is electrically safe.

3.3

Air shortest distance along the surface of the insulator as measured between the two conductive members.

3.6

GB 4208 standard test finger is described, in any direction at a force not to exceed 50N insertion portion is touched.

In order to prevent flashover distance between live parts if any of the standard test finger is less than the clearance given in Appendix A also Considered to be accessible parts.

3.7

Space refers to a dangerous member mounted within its apparatus, in addition to routes through the purposely provided, such as a door or a cover plate removably shift, can not be enter.

3.8

Any component or components for protection against possible injury to persons and set.

4.1 Normal conditions of use

Ambient atmospheric conditions a) the following devices.

--- Temperature. + 5 °C ~ + 45 °C;

--- Relative humidity. 45% to 75%;

--- Pressure. 86kPa ~ 106kPa (kN/m2).

The above conditions, are manufactured in consultation with the consumer, may develop more stringent conditions.

b) the supply voltage and the frequency should be within the design range of the device.

c) For AC power supply apparatus, power supply voltage waveform shall comply with Appendix F requirements.

d) For the apparatus AC and DC, respectively to two power supply separately.

e) If the protective grounding terminals or contacts to be reliably connected to the ground (see 6.2.1), and any other ground terminal should be grounded, But it is designed to rely on manual wiring ground terminals may not be firmly connected to the ground.

f) If the discrepancy doors and other protective cover or objects, it should be closed or fixed in position, unless it is designed to rely on manual playing On or relieved of before they can open or removed.

g) in the working position of the device under design.

h) at any operating position, the device is easy to control.

i) the input signal is operated under the conditions specified technical conditions.

4.2 Fault conditions

Under normal working conditions employed in the apparatus 4.1, when there is listed below a) one ~ h) failure and consequent failure associated, i.e.

Operated under fault conditions. Suitable initial failure should be applied in the following sequence.

a) Since the creepage distance is less than the value of A given in Appendix (unless they meet the requirements of the insulation of 6.6) caused a short circuit between the electrical distance to climb.

b) an electrical short circuit due to the clearance gap is smaller than the value given in Appendix A caused.

c) analysis and by checking a circuit diagram of the device, it is determined that there is component failure. Unless the components proved to be satisfactory.

d) non-normal RF output impedance, including open and short circuits.

e) cooling system failure.

f) discontinuously working motor run continuously, unless protective measures for this device.

g) the movable member rotary or linear motion device, due to mechanical failure stall. h) 3-phase power.

5.1 Overview

In this chapter, the test method is not specified, search is examined depending on the application, a function test or inspection.

5.2 Components

5.2.1 General requirements

Under normal operating conditions, the components used should not exceed its rated value; under fault conditions, can not exceed its rated value. Normal operating and fault conditions detailed in 4.1 and 4.2.

Under normal use conditions, the components have been through in the device test verification and found to comply with safety requirements can not be verified.

Components not the case, to (with Component considerable conditions as used in the device inside the device or in an external device Under) subjected to the test, the number of test components, and the negotiation of producing consumer.

5.2.2 Connector

a) The connector should be designed to not harm caused by incorrect connection.

b) the structure of the connector should be able to prevent the internal conductors are exposed, and to ensure that no contact with other portions.

c) a secondary object (e.g., a monitor) and an inner connector device connection point between the clearance and creepage distances to other circuit values, Appendix A should be at least twice the given value.

d) with a non-detachable connector cords and cables should meet the requirements given in GB 8898.

5.2.3 Switch

Under normal conditions, power supply and other power circuit breaker and a manual switch-off should have good capacity. Break A road under fault conditions, should maintain good breaking capacity. Switch (circuit breaker comprising a separator and safety) with the power supply apparatus should be able to All electrodes are simultaneously disconnected, ensure that the equipment is absolutely safe. Off position of the switch should be clearly marked.

5.2.4 Fuse

The member should be blown fuse encapsulation the fuse rating should be marked as in the fixed member, or marked fuse nearby.

5.2.5 Susceptible to corrosion member

Construction equipment should ensure that harm does not corrode parts in the staff. Producing a test agreed with the consumer, and by Then after the relevant corrosion test specified in GB/T 2423 series of standards.

5.3 Structure

5.3.1 General requirements

a) the device should be used for producing non-combustible materials, and should have sufficient strength to ensure safety.

b) in place due to a loose connection will cause electrical hazards to the mechanical connection should be electrically connected in different ways, the resulting connection Force is not acting on the insulating material. Jianzuo electrical and mechanical connection screws should be a tight fit, not loose.

c) moving parts likely to cause injury and should be adequate protection.

d) where the member is started by a remote control, to be appropriate protective measures to prevent possible injury.

Mechanical design e) apparatus, the possibility that the person should be harmed is reduced to a minimum.

f) design of the equipment, so that the noise should be reduced as much as possible, and to prevent staff auditory nervous system caused due to excessive noise in the environment hurt.

When the noise exceeds a predetermined limit GB/T 14366, the marker should be obvious, the residence time indicated allows personnel and wear tips Good ear protection.

5.3.2 Moisture

Inspection moisture test agreed by manufacturers and consumers. And it should be subjected to these tests GB 2423 series of standards appropriate wet Carried out after the heat test.

5.3.3 Waterproof

If the device is waterproof (see Appendix B of symbols B.3.1 ~ B.3.4), carried out in agreement with the consumer by the producing conditions During the test, it should be kept safe. Further, the device should be subjected to these tests a series of GB 2423 then after an appropriate standard test.

5.3.4 Battery Installation

When the battery is mounted should maintain good ventilation to remove harmful gases and vapors, and to ensure that the battery electrolyte leakage, without impairing Harm other parts, it will not hurt people.

5.4 Security mark

a) labeling relating to safety should remain legible during the entire life of the device, easy to identify. The visual inspection performed by the following method an examination.

--- with two pieces of cloth, a soaking, dipping a gasoline, gently wipe sequence tags, tags should satisfy the above requirements.

--- When exposed to sunlight, it can not be labeled because of fading and difficult to identify. (The conditions of this trial pending)

b) marking text characters should be used. To avoid language problems using the symbol, the symbol should be specified in Annex B.

c) specifically provided to ensure the safety switches and isolators should be clearly labeled to avoid confusion with other switches. Mark should be consistent 5.4b) requirements.

Component d) removably and for preventing harmful radiation during maintenance, should be marked with the appropriate warning signs.

5.5 Electrical Safety

Electrical safety components shall comply with the following conditions.

a) between the member and ground, and the other member may be any voltage between the touch portion, the peak must not exceed 72V. this When used for the measurement instruments, which is not less than the internal resistance of 10k ohm/V.

b) although the peak voltage exceeds 72V, the current and the capacitance value does not exceed the following limits.

Table 1 Current Limit. Frequency current limit. DC 2mA. 100kHz 70mA (peak).

Current here is connected to the non-inductive electrical connection between the member between the accessory and the ground or any other accessible part of 2kHz

Table 2 Capacitance value. Voltage range (peak)/V limit capacitance/µF ~ 72 450 0.1 450 ~ 15000 45/U > 15000 675000/U2

Herein is limited by the capacitance between the capacitance between the member and the member or other accessible part. Peak voltage (U) is Measuring instrument must not be less than 10k ohm/V measured by the internal resistance.

Note: D. Appendix D, 2, provides further proof of the impact of the current flowing through the human body.

6.1 Overview

In this chapter, the test method is not specified, search is examined depending on the application, a function test or inspection.

6.2 Grounding

6.2.1 Protection ground terminal

The accessible conductive member, should be securely connected to the protective grounding terminal. In addition, it should meet the following requirements.

a) connected to the fixed power supply wiring device Use separate protective ground terminal and power supply terminals close as possible, with B. Appendix B 2.1 of symbols to be marked.

The materials used ground terminal, the ground should be compatible with the electrolytic copper conductors. Ground loosened by hand can not be guaranteed.

b) a device having a non-detachable flexible cord or cable Also applies to 6.2.1a) requirements.

Further, the device connected to the power cord or power cable comprising insulated grounding conductor should have a suitable cross section, which color should Appendix E is consistent with the requirements, and be connected to the protective earth terminal device. If equipped with a plug, this wire should be connected to the protective plug Ground.

c) a power connector device grid To ensure that the device has a protective grid power connector ground contact, this contact should be an integral part of a series. In the power supply into an even Before then, first connect the protective ground. On the contrary, after unplug the power to break the protective ground.

d) Protection of erroneous connection with a ground terminal Protection ground terminal and the ground point is not to be protected by any other purpose.

6.2.2 Protective grounding

a) Only the metal shell member assembly, is determined to be sufficient to ensure a continuous ground. Under normal operating conditions and failures Under the conditions, if to ensure permanent good conductivity and an appropriate low impedance ground safety, it can be considered part electrically It is safe.

For the cover, unassembled panels, other protection panel or the like, usually a metal can be considered connected and tightened sufficiently to ensure continuity, Which may be accompanied by uncharged device. If the component included, use a suitable impedance conductors.

b) protective conductor grounding, not for any other purpose.

6.3 Shell

6.3.1 In order to prevent persons from entering the housing hazardous voltages, the safety means should be provided that the following requirements are given in 6.3.2.

After opening the housing, the device allows the remaining values are given in 6.3.2 voltage, in addition to some of the safety rules given in 6.3.3.

6.3.2 Housing safety device a) prior to removing all hazardous voltages and accessible parts of the electric safety requirements, the safety device should ensure that the access door can not hit Open, and manually removable cover, a protection cover can not be disassembled.

1000V peak-to-ground voltage exceeds the protection member are advised to use the grounding switch is opened before an entry or the like covers.

b) personal safety protection device in the safety device should be completed. In addition to security systems should be designed to consider relays, contactors, A reliable operation of the outer member of the circuit breaker (electric, hydraulic or pneumatic means) and the like, should be considered a safety device in predetermined 6.4 Mechanical behavior.

c) the safety interlock device and the housing means and out of locking mechanism should ensure that before the security operation is not correct, personnel can not enter the outer shell. For this reason, it shall be equipped with a suitable mechanical system.

Before d) to ensure that the grounding switch is opened before the protective ground, and all the access door closed cover or the like reset voltage is not dangerous It should be re-access.

e) a housing provided with personnel access device, there must be a reliable means to prevent any person from entering the housing and within the housing after shut plus Dangerous voltage.

6.3.3 The remaining devices on voltage a) a housing with an entry opening and a manually removable cover, so after the protective cover removed, becomes accessible parts shall comply 5.5 definition.

b) the voltage on the device, in addition to the predetermined 5.5A) in the request. If not accessible, and with a resistance of not less than Measured value meter 10k ohm/V is less than the peak value of 354V, it may not meet the requirements 5.5b) of the.

It should be special, not manually detachable protective cover, to prevent persons approaching unsafe voltage, and protective cover shall be marked There are warning labels in line with 5.4b) are required.

6.3.4 Additional measures a) should be as far as possible as an additional security measure the ground bar.

Ground bar should have an insulated handle, with the degree of insulation of the handle to adapt the contact voltage. In the end of the handle has a Rigid conductive hook, a suitable cross section with a soft conductive wire hook apparent ground. If the insulating material on the cord is required Insulation should be transparent, and more relaxed on the conductor sheath, an insulating beads can also be used instead.

b) design of the equipment shall ensure that the insulating material when in contact with the external surface of the device (if not grounded instrument observation window, loading member, etc.), It will not be a shock.

5.5 voltage test should be carried out.

6.4 Mechanical properties of the security device

Design a) safety devices, to meet the "failsafe" principle, that is, in case the internal safety device failure personnel still mention For protection.

b) may indicate a false security should not occur.

c) the safety device from the "safe" conversion "unsafe" position, can be carried out at the accurate operation, and the "safe" position And "unsafe" position should not be confused.

d) should not use the safety device is manually loss protection. […]