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Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 37751.2-2019: Residual current operated circuit-breakers for household and similar use -- Part 2: Residual current devices (RCDs) -- Vocabulary Status: Valid
Basic dataStandard ID: GB/T 37751.2-2019 (GB/T37751.2-2019)Description (Translated English): Residual current operated circuit-breakers for household and similar use -- Part 2: Residual current devices (RCDs) -- Vocabulary Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K31 Classification of International Standard: 29.120.50 Word Count Estimation: 30,386 Date of Issue: 2019-06-04 Date of Implementation: 2020-01-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 37751.2-2019: Residual current operated circuit-breakers for household and similar use -- Part 2: Residual current devices (RCDs) -- Vocabulary---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. Residual current operated circuit-breakers for household and similar use--Part 2. Residual current devices (RCDs)--Vocabulary ICS 29.120.50 K31 National Standards of People's Republic of China Residual current operated circuit breakers for household and similar purposes Part 2. Residual Current Appliances (RCD) Vocabulary Published on.2019-06-04 2020-01-01 implementation State market supervision and administration China National Standardization Administration issued ContentForeword III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 3.1 Definition of the flow of current from live parts to earth 1 3.2 Definition of RCD Incentives 2 3.3 Definition of RCD actions and functions 2 3.4 Definitions relating to incentive magnitudes and ranges 6 3.5 Definitions relating to arcing time 8 3.6 Matching between series of overcurrent protection devices 9 3.7 Definitions relating to impact magnitudes and ranges 10 3.8 Definitions related to terminal blocks 11 3.9 Definitions relating to operating conditions 12 3.10 Definitions relating to structural components 13 3.11 Definitions related to the test 14 3.12 Definitions relating to insulation coordination 15 Appendix A (informative) Glossary 17 Reference 18 Index 19ForewordGB/T 37751 "Residual current operated circuit breakers for household and similar purposes" is divided into the following sections. --- Part 1. Overview of independent modules and unit modules for residual current electrical standards (GB/T 37751.1); --- Part 2. Residual current electrical appliances (RCD) Vocabulary (GB/T 37751.2); --- Part 3-1. Particular requirements for RCDs with non-threaded terminals to be connected to external copper conductors (GB/T 37751.31); --- Part 3-2. Particular requirements for RCDs with flat quick-connect ends (GB/T 37751.32); ---Part 3-3. Threaded terminal blocks with external untreated aluminium conductors and aluminium threaded connection to copper or aluminium conductors Special requirements for type terminal block RCD (GB/T 37751.33). This part is the second part of GB/T 37751. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This section uses the translation method equivalent to IEC 62873-2.2016 "Residual Current Circuit Breakers for Household and Similar Uses Part 2" Points. Residual Current Appliances (RCD) Vocabulary. This section has made the following editorial changes. --- Added Chinese Pinyin index and moved the English corresponding word index from Chapter 3 to the end of the text. --- To facilitate understanding and distinguishing terms, for some terms, move the contents of the definition to the term. ● "3.2.6 Residual current" is modified to "3.2.6 (RCBO) residual current"; ● "3.3.23 main circuit" is modified to "3.3.23 (RCD) main circuit"; ● "3.3.24 control circuit" is modified to "3.3.24 (RCD) control circuit"; ● "3.3.25 auxiliary circuit" is modified to "3.3.25 (RCD) auxiliary circuit"; ● “3.5.1 arcing time” is changed to “3.5.1 (one pole) arcing time”; ● “3.5.2 arcing time” is changed to “3.5.2 (multi-pole RCD) arcing time”; ● "3.5.3 Breaking time" is changed to "3.5.3 (breaking time under overcurrent)"; ● "3.5.9 I2t characteristics" is changed to "I.2 characteristics of 3.5.9 RCD". ---Delete definition "remaining action current" "remaining non-operating current" "remaining on and off capability" "limit short-circuit current" "limit remaining The error symbol in the "short-circuit current" and the corresponding contents in Appendix A are modified. This part was proposed by China Electrical Equipment Industry Association. This part is under the jurisdiction of the National Low Voltage Electrical Appliance Standardization Technical Committee (SAC/TC189). This section drafted by. Shanghai Electric Apparatus Research Institute, Shanghai Nojac Electric Co., Ltd., Zhongshan Kaipu Electric Co., Ltd., Zhejiang Tianzheng Electric Co., Ltd., Beijing Deweite Electric Technology Co., Ltd. The main drafters of this section. Wang Yuxuan, Li Renjie, Pan Youyi, Zou Jianhua, Fan Qiwen, and Yan Fan. Residual current operated circuit breakers for household and similar purposes Part 2. Residual Current Appliances (RCD) Vocabulary1 ScopeThis part of GB/T 37751 defines the terms and definitions used in the RCD product standard.2 Normative referencesThere are no normative references in this section.3 Terms and definitionsThe following terms and definitions apply. Unless otherwise specified, the term "voltage" or "current" is used to mean an effective value. Note. When the terms "RCC", "RCBO" or "RCD" are used in place of the terms "electrical appliance" or "mechanical switching appliance", the definition of IEV is also cited. 3.1 Definition of the inflow of earth current from live parts 3.1.1 Ground fault current earthfaultcurrent Current flowing into the earth due to insulation failure. Note. Rewrite GB/T 2900.70-2008, define 442-01-23. 3.1.2 Earth leakage current earthleakagecurrent No insulation fault, current flowing from the live parts of the equipment into the earth. Note. Rewrite GB/T 2900.70-2008, define 442-01-24. 3.1.3 Pulsating direct current pulsatingdirectcurrent In each rated power frequency period, the electrical angle represents a pulsating waveform with a current value of 0 over a period of at least 180° Current. Note. The adjective "pulsating" is specified in GB/T 2900.92-2015, 103-06-07. 3.1.4 Current lag angle currentdelayangle The phase represented by the electrical angle at which the start of the current conduction lags by the phase control. Note. Rewrite GB/T 2900.70-2008, define 442-05-42. 3.1.5 Smooth DC current smoothdirectcurrent DC current without ripples. Note. When the coefficient of the ripple is less than 10%, it can be considered that the current has no ripple. 3.2 Definition of RCD incentives 3.2.1 Incentive amount Applied alone or in combination with other such quantities to an RCD, it is capable of performing the electrical excitation of its function under specified conditions. 3.2.2 Incentive input quantity energizinginput-quantity The amount of excitation that causes the RCD to operate when applied under specified conditions. Note. These conditions may include, for example, determining the excitation of the auxiliary component. 3.2.3 Residual current residual current IΔ The vector sum (expressed as a rms value) of the instantaneous value of the current flowing through the RCD main loop. Note. Rewrite GB/T 2900.70-2008, define 442-05-19. 3.2.4 Residual action current residual operating current The residual current value that causes the RCD to operate under specified conditions. [GB/T 2900.70-2008, definition 442-05-20] 3.2.5 Remaining non-operating current residualnon-operatingcurrent At this current (and below this current), the residual current value at which the RCD does not operate under specified conditions. [GB/T 2900.70-2008, definition 442-05-21] 3.2.6 (RCBO) residual current residualcurrent(ofanRCBO) IΔt The residual current value at the lower limit of the instantaneous overcurrent trip range. 3.3 Definition of RCD actions and functions 3.3.1 Switching electrical switchingdevice A device for turning on or breaking current in one or several electrical circuits. [IEC 60050-441.2000, definition 441-14-01] 3.3.2 Mechanical switch electrical mechanicalswitchingdevice A detachable contact is used to close or disconnect one or more electrical circuit switching devices. Note. Rewrite IEC 60050-441.2000, definition 441-14-02. 3.3.3 Circuit breaker circuit-breaker Capable of switching on, carrying and breaking current under normal circuit conditions and also being able to be switched on under specified abnormal conditions (eg short circuit) A mechanical switching device that sets the time and (automatically) the breaking current. [IEC 60050-441.2000, definition 441-14-20] 3.3.4 Fuse fuse When the current exceeds a specified value for a sufficient period of time, by blowing one or several proportional components of the special design and ingredients, A device that disconnects current from the circuit it is connected to. The fuse includes all the components that make up the complete device. [IEC 60050-441.2000, definition 441-18-01] 3.3.5 Residual current appliance residualcurrentdevice; RCD The current can be switched on, carried and disconnected under normal operating conditions, and the contact can be made when the residual current reaches a specified value under specified conditions Disconnected mechanical switchgear or combination. Note. Rewrite GB/T 2900.70-2008, define 442-05-02. 3.3.6 Detection detection The function of the residual current is perceived as the residual current. Note. For example, this function can be implemented with a transformer that combines current vector sums. [GB/T 2900.70-2008, definition 442-05-24] 3.3.7 Discriminating evaluation (Residual current appliance) A function that causes the residual current appliance to operate when the detected residual current exceeds a specified reference value. Note. Rewrite GB/T 2900.70-2008, definition 442-05-25. 3.3.8 Disconnect interruption (Remaining current appliance) causes the main contact of the residual current appliance to automatically switch from the closed position to the open position, thereby cutting off its flow The function of the current. Note. Rewrite GB/T 2900.70-2008, definition 442-05-26. 3.3.9 Residual current unit rcunit A function capable of simultaneously detecting a residual current, comparing the current value with a residual operating current value, and having an operation and a group thereof A device for mounting or combining a circuit breaker trip mechanism. 3.3.10 Residual current operated circuit breaker without overcurrent protection residualcurrentoperatedcircuit-breakerwithoutintegral Overcurrentprotection;RCCB Residual current operated circuit breakers that cannot be used to perform overload and/or short circuit protection functions. Note. Rewrite GB/T 2900.70-2008, define 442-05-03. 3.3.11 Residual current operated circuit breaker with overcurrent protection residualcurrentoperatedcircuit-breakerwithintegralover- Currentprotection;RCBO A residual current operated circuit breaker that can be used to perform overload and/or short circuit protection functions. Note. Rewrite GB/T 2900.70-2008, define 442-05-04. 3.3.12 RCD RCDfunctionalyindependentoflinevoltage whose action function is independent of supply voltage The RCD whose detection, discrimination, and disconnection functions are independent of the power supply voltage. [GB/T 2900.70-2008, definition 442-05-08] 3.3.13 RCD RCDfunctionalydependentonlinevoltage with action function related to supply voltage It detects, discriminates, and breaks the RCD associated with the supply voltage. Note. Obviously, to detect, discriminate, and break, the supply voltage is applied to the RCD. [GB/T 2900.70-2008, definition 442-05-09] 3.3.14 Free trip RCD trip-freeRCD After the closing operation starts, if the (automatic) opening operation is performed, even if the closing command is held, the moving contact can return and remain in the breaking position. Set the RCD. Note 1. In order to ensure that the current that has been generated is normally disconnected, the contacts may need to instantaneously reach the closed position. Note 2. Rewrite IEC 60050-441.2000, definition 441-16-31. 3.3.15 Break time breaktime The time elapsed from the moment the residual operating current is reached to the moment when all pole arcs are extinguished. 3.3.16 Limit not driving time limitingnon-actuatingtime A maximum delay time is applied to the RCD that is greater than the residual current value of the remaining non-operating current without causing the RCD to operate. Note. Rewrite GB/T 2900.70-2008, define 442-05-23. 3.3.17 Time-delay RCD time-delayRCD A specially designed RCD that corresponds to a given residual current value and achieves a predetermined limit non-drive time. [GB/T 2900.70-2008, definition 442-05-05] 3.3.18 Reset type RCD resetRCD Residual current that must be reclosed and re-operated after a manual reset by a device other than the operating member before reclosing Electrical appliances. Note. Rewrite GB/T 2900.70-2008, define 442-05-10. 3.3.19 Closed position closedposition (Mechanical switchgear) A position that guarantees the predetermined continuity of the RCD main circuit. Note. Rewrite IEC 60050-441.2000, definition 441-16-22. 3.3.20 Disconnect position openposition (Mechanical switchgear) ensures a predetermined electrical clearance between the broken contacts of the RCD main circuit. Note. Rewrite IEC 60050-441.2000, definition 441-16-23. 3.3.21 Polar pole A component of an RCD that is only connected to a separate conductive path of the main circuit has contacts for connecting and disconnecting the main circuit itself. It does not include those components that are used to hold the poles together and move the poles together. Note. Rewrite IEC 60050-441.2000, definition 441-15-01. 3.3.21.1 Overcurrent protection pole overcurrentprotectedpole Protective pole protectedpole A pole with an overcurrent release. Note. Rewrite GB/T 2900.70-2008, define 442-05-40. 3.3.21.2 No overcurrent protection pole overcurrentunprotectedpole Unprotected pole unprotectedpole There is no pole of the overcurrent release, but in other respects it usually has the same performance as the protection pole of the same RCD. Note 1. In order to ensure the technical requirements, the unprotected pole can be the same as the guard pole structure or adopt a special structure. Note 2. If the non-protective pole short circuit capability is different from the protection pole, it should be indicated by the manufacturer. Note 3. Rewrite GB/T 2900.70-2008, define 442-05-41. 3.3.21.3 Open and close neutral pole switchedneutralpole It is only used to open and close the neutral line without the need for a short circuit capability. [GB/T 2900.70-2008, definition 442-05-45] 3.3.22 Uninterruptible neutral extreme uninterruptedneutral The current path used to connect the neutral conductor of the device is uninterrupted and has no overcurrent protection. [GB/T 2900.70-2008, definition 442-01-51] 3.3.23 Main circuit (ofanRCD) of (RCD) Includes all conductive parts of the RCD in the current path. Note. Rewrite IEC 60050-441.2000, definition 441-15-02. 3.3.24 (RCD) control circuit controlcircuit(ofanRCD) A closed or open operation for RCD or a circuit for both (except for the current path of the main circuit). Note. This definition includes the circuitry used to test the device. 3.3.25 Auxiliary circuit (ofanRCD) All conductive parts of the RCD included in the circuit other than the main circuit and control circuit of the RCD. Note. Rewrite IEC 60050-441.2000, definition 441-15-04. 3.3.26 AC type RCD RCDTypeAC The residual sinusoidal alternating current that is suddenly applied or slowly rises ensures the tripped RCD. 3.3.27 Type A RCD RCDTypeA The residual sinusoidal alternating current and the residual pulsating direct current that are suddenly applied or slowly rise can ensure the tripped RCD. For the pulse Dynamic DC residual current, with a maximum of 6mA smooth DC current. 3.3.28 F type RCD RCDTypeF As in Type A, the residual current appliances that ensure tripping are. --- Compound residual remaining suddenly or slowly rising in the circuit that supplies the phase conductor and the neutral conductor or the phase conductor and the grounded intermediate conductor Current --- For pulsating DC residual current, the highest superimposed 10mA smooth DC current. Note. The tripping of type A RCD is based on IEC 61008-1 or IEC 61009-1. 3.3.29 Type B RCD RCDTypeB As in the F-type, and in the following additional requirements to ensure that the residual current appliances are tripped. --- sinusoidal AC residual current up to 1000Hz; --- A smooth DC current superimposed on the residual current of the AC by 0.4I Δn or 10 mA (both of which are larger); --- Superimposed smooth DC current on the pulsating DC residual current; --- Rectified pulsating DC residual current generated by two or more phases; --- Smooth, DC residual current independent of polarity that is suddenly applied or slowly rising. 3.3.30 Test device testdevice A device for the residual current condition of an analog RCD mounted in an RCD operating under specified conditions. 3.4 Definitions relating to incentive magnitudes and ranges 3.4.1 Rated value The quantity specified by the manufacturer for the specific operating conditions of the RCD. Note. Rewrite IEC 60050-441.2000, definition 441-18-35. 3.4.2 Overcurrent Current exceeding the rated current value. [GB/T 2900.70-2008, definition 442-01-20] 3.4.3 Limit of non-operating current under single-phase overcurrent conditions limitingvalueofthenon-operatingcurrentincaseofsingle Phaseovercurrent The maximum single-phase overcurrent value that can flow through the RCD (regardless of the number of poles) without causing its action when there is no residual current. Note. In the case of overcurrent in the main circuit, when there is no residual current, the detection device may act due to the asymmetry of the detection device itself. 3.4.4 Overload current overloadcurrent An overcurrent that occurs in a circuit that is not electrically damaged. Note. If the overload current lasts long enough, it may cause damage. 3.4.5 Short circuit current short-circuitcurrent An overcurrent generated by a fault with a negligible impedance between points at different potentials during normal operation. Note. The short circuit current may be caused by a fault or by a faulty connection. 3.4.6 Residual short circuit withstand current residualshort-circuitwithstandcurrent The maximum value of the residual current that can ensure the operation of the RCCB under specified conditions. Above this value, the device may suffer irreversible Variety. 3.4.7 Expected current prospectivecurrent When the main current loop of the RCD and the overcurrent protection device (if any) is replaced by a negligible conductor, the circuit The current that may flow in. Note 1. The expected current can also be regarded as an actual current, such as. expected breaking current, expected peak current, expected residual current, etc. Note 2. Rewrite GB/T 2900.70-2008, definition 442-01-47. 3.4.8 Expected peak current perspectivepeakcurrent The peak value of the current is expected during the transient after switching on. Note. This definition assumes that the current is switched on by the ideal RCBO, ie its impedance instantaneously changes from infinity to zero, and the current can flow through several different paths. Circuitry, such as multiphase circuits, this definition further assumes that the current is turned on at the same time at all poles, even if only one pole is considered. [IEC 60050-441.2000, definition 441-17-02] 3.4.9 Maximum expected peak current maximumprospectivepeakcurrent (AC circuit) When the current is turned on, the expected peak current occurs at the moment that may cause the maximum value. Note. For multipole RCDs in multiphase circuits, the maximum expected peak current is only one pole. 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