GB 30439.3-2013Safety requirements for industrial automation products-Part 3: Safety requirements for temperature transmitter (English PDF)

3.1 Equipment and devices

3.1.1 Stationary equipment fixedequipment Fixed to the support member or an additional fixture at a specific location. [GB 4793.1-2007, the definition 3.1.1]

3.1.2 PERMANENTLY CONNECTED EQUIPMENT permanentlyconnectedequipment Scheduled to use screw terminals or other reliable methods and building installation wiring connected device.

3.1.3 Portable device portableequipment A closed system, it can be moved in operation, along with the power supply or can it be easily moved from one location to another. example For example, programming and debugging tool (PADT) and test equipment (TE).

3.1.4 Handheld device hand-heldequipment One of the available single-handedly carrying the other hand operated device.

3.1.5 Tools tool To help people to perform some kind of mechanical function and use, including keys and coins, including an external device. [GB 4793.1-2007, the definition 3.1.5]

3.2 Parts and Accessories

3.2.1 Terminal terminal A component of the apparatus (device) connected to the outer conductor provided.

Note. The terminal can contain one or more contacts, so that the term also includes sockets, connectors and the like.

3.2.2 Functional ground terminal functionalearthingterminal To a point directly measuring or control circuit, or directly with a shield portion is electrically connected, but also reservations To be used for any function other than safety purposes purpose a ground terminal.

3.2.3 Protective Conductor Terminal protectiveconductorterminal For security purposes and conductive parts of equipment are connected, but also with a predetermined external terminal connected to protective earthing system.

3.2.4 Protective conductor protectiveconductor For security purposes (for example, protection against electric shock) to provide a conductor.

3.2.5 Housing enclosure Provide protection suitable for the intended application and the type of housing protection rating. [GB 4793.1-2007, the definition 3.2.4]

3.2.6 Baffle barrier Prevent parts from any direction normal close direct contact provided. [GB 4793.1-2007, the definition 3.2.5]

3.3 Electrical values

3.3.1 Rated (value) rated (value) Usually by the manufacturer for the components, apparatus, or device reaches a given magnitude of working status. [GB 4793.1-2007, the definition 3.3.1]

3.3.2 Rating rating A set of ratings and working conditions. [GB 4793.1-2007, the definition 3.3.2]

3.3.3 Operating voltage workingvoltage When the device is working under conditions of normal use, considered on insulation or components are exposed to or be able to withstand a maximum voltage.

Note 1. The instantaneous voltage is not considered.

Note 2. The open circuit conditions and normal conditions are to be considered.

3.4 Test

3.4.1 Type test typetest For one or more products of the project done by a representative compliance testing. [GB 4793.1-2007, the definition 3.4.1]

3.4.2 Routine tests (routine tests) routinetest During or after the manufacturing of various technical indicators do conformance testing. [GB 4793.1-2007, the definition 3.4.2]

3.5 Security Terminology 3.5.1 (Parts) palpable accessible (ofapart)

6.2 When prescribed use standard test finger or test pin accessible. [GB 4793.1-2007, the definition 3.5.1]

3.5.2 Dangerous hazard Potential source of harm.

3.5.3 Hazardous live hazardouslive It means capable of causing electrical shock or burns under normal conditions of use or single fault condition. Applicable under normal conditions of use values refer to GB 4793.1-2007 specified in 6.3.1; values apply to single fault conditions, see GB 4793.1-2007 specified in 6.3.2.

3.5.4 Power supply mains It is designed to make about the device connected thereto need for equipment to provide electricity for the purpose of low voltage power supply system.

3.5.5 MAINS circuit mainscircuit Intended to be connected with the power supply, the device providing power circuits.

3.5.6 Protective impedance protectiveimpedance It is treated as a single component failures, component or a combination of basic insulation and limiting/pressure limiting device combination. Impedance, structure and Reliability is such that, when between hazardous live parts and accessible conductive parts are connected, which provide normal conditions and single fault conditions Under this section the required degree of protection.

3.5.7 Protection connection protectivebonding To make electrical ACCESSIBLE conductive parts or protective screen and for the external protection conductor is connected with electrical continuity and having carried connection.

3.5.8 Normal use normaluse Operation according to instructions or intended use by the apparent instructions, including standby. In most cases, the normal use also refers to normal conditions, because the use of manual warns users not to use the change in non-normal conditions Transmitter.

3.5.9 Normal conditions normalcondition All protective measures to prevent dangerous conditions are perfect, that is no fault condition.

3.5.10 Single fault condition singlefaultcondition Protective measures to prevent the risk of a failure condition occurs or is likely to cause some dangerous and a fault condition.

Note. If a single fault condition will inevitably lead to another single fault conditions, such a two failures are considered a single fault condition.

3.5.11 Operator operator According to the intended use of the device to operate the equipment man.

Note. the operator for this purpose should be properly trained.

3.5.12 Responsible responsiblebody Responsible for the maintenance and use of equipment or operating personnel to ensure adequate training for individuals or organizations.

3.6 Insulation

3.6.1 Basic insulation basicinsulation Insulation HAZARDOUS LIVE parts which provides basic protection. [GB 4793.1-2007, the definition 3.6.1]

3.6.2 Additional insulation supplementaryinsulation In addition to basic insulation independent insulation outside also uses for fault protection. [GB 4793.1-2007, the definition 3.6.2]

3.6.3 Double insulation doubleinsulation Constituted by the basic insulation and supplementary insulation. [GB 4793.1-2007, the definition 3.6.3]

3.6.4 Reinforced insulation reinforcedinsulation Insulation dangerous live parts, which provides insulation equivalent to double the level of protection against electric shock. NOTE. Reinforced insulation may comprise several layers, these layers can not be alone as a basic or supplementary insulation testing. [GB 4793.1-2007, the definition 3.6.4]

3.6.5 Pollution polution It will lead dielectric strength or surface resistivity reduced solid, liquid or gaseous (ionized gas) additional foreign substances.

3.6.6 Pollution degree (in the micro-environment) polutiondegree (inthemicro-environment) To determine the clearances and creepage distances, the pollution degree microenvironment as the following three grades.

Note 1. The build-up of foreign matter and moisture can cause conductive insulator contamination.

Note 2. The minimum clearances for pollution degree Pollution Degree 2 and 3 are given based on experience rather than raw data.

3.6.6.1 Pollution Level 1 polutiondegree

1 No pollution or only dry non-conductive pollution, the pollution has no adverse effect. [GB 4793.1-2007, the definition 3.6.6.1]

3.6.6.2 Pollution Level 2 polutiondegree

2 Normally only non-conductive pollution, but occasionally due to condensation and short conductive.

3.6.6.3 Pollution Level 3 polutiondegree

3 Conductive pollution or dry non-conductive pollution which becomes conductive due to condensation.

Note. In this condition, the device is usually to prevent exposure to direct sunlight, rain, strong wind pressure, but it need not control the temperature or humidity.

3.6.7 Clearance clearance Space the shortest distance between two conductive parts. According to GB/T 16935.1-2008 provisions in 1.3.2.

3.6.8 Creepage distance creepagedistance Along the shortest distance between two conductive insulating solid surface material parts. [GB 4793.1-2007, the definition 3.6.8]

4.3.2.8 Output For providing an electrical output of the transmitter. Working condition

a) of the transmitter should be able to provide the rated output power of the rated load;

b) to any output, rated load impedance should be connected or not.

4.4 Test under single fault conditions

4.4.1 Overview It should be according to the following requirements.

a) Check the circuit diagram of the transmitter and can usually determine whether there is likely to cause dangerous fault conditions and therefore whether it should be applied;

b) In addition to proof of a specific fault conditions likely to cause danger, the test shall be the fault;

c) The transmitter shall operate at reference test conditions (see 4.3) the most unfavorable combination of conditions, for different faults, which combined strip Member can vary, these combined conditions should be recorded during each test.

4.4.2 Fault conditions imposed Fault conditions 4.4.2.1 ~

4.4.2.6 should include provisions for fault conditions. These fault conditions can only be applied to one and should press Sequentially applied in any convenient order, can not be applied more than one fault at the same time, the results unless it is applied to a fault caused by a fault. After each applied once the fault condition, the transmitter or parts shall pass the applicable test 4.4.4.

4.4.2.1 Impedance protection

a) If the impedance protection is a combination of components to form, it should be shorted or open each component, choose one of the more not Lee's.

b) If the impedance protection by basic insulation and current limiting or pressure-limiting devices to form, the basic insulation and current limiting pressure limiting device, or both Caught should afford a single fault condition, once applied to a fau...