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GB/T 14048.5-2017 English PDF (GBT14048.5-2017)

GB/T 14048.5-2017 English PDF (GBT14048.5-2017)

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GB/T 14048.5-2017: Low-voltage switchgear and controlgear -- Part 5-1: Control circuit devices and switching element -- Electromechanical control circuit devices
GB/T 14048.5-2017
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.120.40
K 31
Replacing GB/T 14048.5-2008
Low-voltage switchgear and controlgear -
Part 5-1: Control circuit devices and switching
element - Electromechanical control circuit devices
(IEC 60947-5-1:2016, MOD)
ISSUED ON: NOVEMBER 01, 2017
IMPLEMENTED ON: MAY 01, 2018
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of the PRC;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 4 
1 General ... 8 
2 Terms and definitions... 12 
3 Classification ... 22 
4 Characteristics ... 23 
5 Product information ... 29 
6 Normal service, mounting and transport conditions ... 32 
7 Constructional and performance requirements ... 34 
8 Tests ... 45 
Annex A (Normative) Electrical ratings based on utilization categories (see 3.1) ... 66 
Annex B (Normative) Example of inductive test loads for d.c. contacts ... 68 
Annex C (Normative) Special tests - Durability tests ... 70 
Annex D Vacant ... 74 
Annex E (Normative) Items subject to agreement between manufacturer and user .. 75 
Annex F (Normative) Class II control circuit devices insulated by encapsulation -
Requirements and tests ... 76 
Annex G (Normative) Additional requirements for control circuit devices with
integrally connected cables ... 81 
Annex H (Normative) Additional requirements for semiconductor switching elements
for control circuit devices ... 84 
Annex J (Normative) Special requirements for indicator lights and indicating towers
... 91 
Annex K (Normative) Special requirements for control switches with direct opening
action ... 99 
Annex L (Normative) Special requirements for mechanically linked contact elements
... 105 
Annex M (Normative) Terminal marking, distinctive number and distinctive letter for
control circuit devices ... 109 
Annex N (Normative) Procedure to determine reliability data for electromechanical
devices in control circuits used in functional safety applications ... 115 
Bibliography... 118 
Foreword
“Low-voltage switchgear and controlgear” consists of the following parts:
- Part 1: General rules;
- Part 2: Circuit-breakers;
- Part 3: Switches, disconnectors, switch-disconnectors and fuse-
combination units;
- Part 4-1: Contactors and motor-starters - Electromechanical contactors and
motor-starters (Including motor protector);
- Part 4-2: Contactors and motor starters - Semiconductor controllers and
starters for AC motors (including soft starters);
- Part 4-3: Contactors and motor-starters - AC semiconductor controllers and
contactors for non-motor loads;
- Part 5-1: Control circuit devices and switching element - Electromechanical
control circuit devices;
- Part 5-2: Control circuit appliances and switching elements - Proximity
switches;
- Part 5-3: Control circuit devices and switching elements - Requirements for
proximity devices with defined behaviour under fault conditions (PDDB);
- Part 5-4: Control circuit devices and switching elements - Method of
assessing the performance of low-energy contacts - Special tests;
- Part 5-5: Control circuit devices and switching elements - Electrical
emergency stop device with mechanical latching function;
- Part 5-6: Control circuit devices and switching elements - DC interface for
proximity sensors and switching amplifiers (NAMUR);
- Part 5-7: Control circuit devices and switching elements - Requirements for
proximity devices with analogue output;
- Part 5-8: Control circuit devices and switching elements - Three-position
enabling switches;
- Part 5-9: Control circuit devices and switching elements - Flow rate
switches;
- Part 6-1: Multiple function equipment - Transfer switching equipment;
- Section 6-2: Multiple function equipment control and protective switching
devices (or equipment) (CPS);
- Part 7-1: Ancillary equipment - Terminal blocks for copper conductors;
- Part 7-2: Ancillary equipment - Protective conductor terminal blocks for
copper conductors;
- Part 7-3: Ancillary equipment - Safety requirements for fuse terminal blocks;
- Part 8: Control units for built-in thermal protection (PTC) for rotating
electrical machines.
This Part is Part 5-1 of “Low-voltage switchgear and controlgear”.
This Part is drafted in accordance with the rules given in GB/T 1.1-2009.
This Part replaces GB/T 14048.5-2008 “Low-voltage switchgear and
controlgear - Part 5-1: Control circuit devices and switching element -
Electromechanical control circuit devices”.
As compared with GB/T 14048.5-2008, the main technical changes of this Part
are as follows:
- Delete the characteristic requirements related to the overvoltage of make-
break operation (see 4.9 of the 2008 edition);
- ADD polarity requirements for contact elements (see 4.10);
- ADD the information content which the manufacturer shall provide [see 5.1
o)~5.1 p)];
- Modify the marking requirements for terminals, emergency stop, etc. (see
5.2.1~5.2.4; 5.2.1~5.2.4 of the 2008 edition);
- ADD the requirements for glow-wire testing and test based on flammability
category (see 7.1.2.2, 7.1.2.3);
- Modify the requirements for clearances and creepage distances; and
directly QUOTE the corresponding provisions of IEC 60947-1 (see 7.1.4;
7.1.3 of the 2008 edition);
- ADD requirements related to maximum recovery time (see 7.2.8);
- Modify the requirements related to immunity (see 7.3.2; 7.3 of the 2008
edition);
- ADD types of special tests which can be performed, including damp heat,
salt mist, vibration, and shock tests, etc. (see 8.1.5);
- ADD requirements of electrical performance and ageing test for screwless-
type clamping units (see 8.2.4.7~8.2.4.8);
- ADD speed requirements for movement rotary switches (see 8.3.2.1);
- Modify the requirements for adjustment of prospective current in the test
circuit and test quantities (see 8.3.4.3; 8.3.4.3 of the 2008 edition);
- ADD EMC tests (see 8.4);
- ADD Figure 10 “Voltage drop measurement at contact point of the clamping
unit or terminal” (see 8.4.4);
- Delete Annex D “Clearances and creepage distances of control circuit
devices” and left vacant;
- Modify the provisions of pulling force for cable in the pull-out test (see
G.8.2.2; G.8.1.1 of the 2008 edition);
- Modify the general requirements for EMC verification test and immunity test
of control circuit devices with semiconductor switching elements (see
H.8.7.1~H.8.7.2; H.8.7.1~H.8.7.2 of the 2008 edition);
- Delete the requirements related to lens color (see Annex J);
- ADD the provisions of terminal marking, distinctive number, and distinctive
letter for control circuit devices (see Annex M);
- ADD the provisions of “Procedure to determine reliability data for
electromechanical devices in control circuits used in functional safety
applications” (see Annex N).
This Part uses redraft law to modify and adopt IEC 60947-5-1:2016 “Low-
voltage switchgear and controlgear - Part 5-1: Control circuit devices and
switching elements - Electromechanical control circuit devices”.
The technical differences between this Part and IEC 60947-5-1:2016 and their
reasons are as follows:
- About normative references, this Part has made adjustments with technical
differences, to adapt to the technical conditions of China. The adjustments
are reflected in Clause 2 “Normative references”. The specific adjustment
is ...
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