GB/T 14048.20-2013Low-voltage switchgear and controlgear -- Part 5-8: Control circuit devices and switching elements -- Three-position enabling switches (English PDF)

Foreword

GB 14048 "Low-voltage switchgear and control equipment" is currently divided into 21 sections.

--- GB 14048.1 low-voltage switchgear and control equipment Part 1. General;

--- GB 14048.2 low-voltage switchgear and control equipment Part 2. Circuit Breaker;

--- GB 14048.3 low-voltage switchgear and control equipment - Part 3. Switches, disconnectors, switch and fuse combination

Appliances;

--- GB 14048.4 low-voltage switchgear and control equipment - Part 4-1. Contactors and motor starters - Electromechanical contactors

And motor starters;

--- GB 14048.5 low-voltage switchgear and control equipment Part 5-1. Control circuit devices and switching elements - Electromechanical control

Electrical circuit;

--- GB 14048.6 low-voltage switchgear and control equipment Part 4-2. Contactors and motor starters - AC semiconductor

Motor controllers and starters (including soft starter);

--- GB/T 14048.7 low-voltage switchgear and control equipment Part 7-1. Ancillary copper conductor terminal blocks;

--- GB/T 14048.8 low-voltage switchgear and control equipment Part 7-2. Protection of the auxiliary conductor wiring copper conductors

Terminal block;

--- GB 14048.9 low-voltage switchgear and control equipment Part 6-2. Multiple function equipment (equipment) control and protection switch

Electric (equipment) (CPS);

--- GB/T 14048.10 voltage switchgear and control equipment Part 5-2. Control circuit devices and switching elements proximity

switch;

--- GB/T 14048.11 voltage switchgear and control equipment Part 6-1. Multiple function equipment - Transfer switching equipment;

--- GB/T 14048.12 voltage switchgear and control equipment Part 4-3. Contactors and motor starters - Non-Motor

Load AC semiconductor controllers and contactors;

--- GB/T 14048.13 voltage switchgear and control equipment Part 5-3. Control circuit devices and switching elements - Fault

Proximity Switch (PDF) to determine the conditions required to have the function;

--- GB/T 14048.14 voltage switchgear and control equipment Part 5-5. Control circuit devices and switching elements - with a machine

Mechanical latching function electrical emergency braking device;

--- GB/T 14048.15 voltage switchgear and control equipment Part 5-6. Control circuit devices and switching elements - proximity Biography

Sensors and switching amplifiers DC Interface (NAMUR);

--- GB/T 14048.16 voltage switchgear and control equipment - Part 8. rotary motor control with built - in thermal protection (PTC)

Unit;

--- GB/T 14048.17 voltage switchgear and control equipment Part 5-4. Control circuit devices and switching elements of small capacity

The method of evaluating the performance of special test contacts;

--- GB/T 14048.18 voltage switchgear and control equipment Part 7-3. Ancillary safety fuse terminal blocks

Wide requirements;

--- GB/T 14048.19 voltage switchgear and control equipment Part 5-7. Control circuit devices and switching elements for band

Analog output proximity equipment requirements;

--- GB/T 14048.20 voltage switchgear and control equipment Part 5-8. Control circuit devices and switching elements make three

You can switch;

--- GB/T 14048.21 voltage switchgear and control equipment Part 5-9. Control circuit devices and switching elements flow

switch.

This section GB 14048 "Low-voltage switchgear and control equipment" in Section 20.

This section drafted in accordance with GB/T 1.1-2009 given rules.

This section uses the translation method identical with IEC 60947-5-8.2007 "low-voltage switchgear and control equipment Part 5-8. control circuit

Three-way devices and switching elements enable switch. "

This part made the following editorial changes.

--- Remove the IEC foreword;

--- Chapter 2 by deleting the definition of the alphabetical index.

Consistency correspondence between this part of international documents and normative references of our files are as follows.

--- GB 14048.1-2012 Low-voltage switchgear and control equipment Part 1. General (IEC 60947-1.2011, MOD);

--- GB 14048.5-2008 Low-voltage switchgear and control equipment - Part 5-1. Control circuit devices and switching elements Machine

Electrical control circuit devices (IEC 60947-5-1.2003, MOD).

This part is proposed by the China Electrical Equipment Industrial Association.

The low-voltage electrical part by the National Standardization Technical Committee (SAC/TC189) centralized.

This section is responsible for drafting unit. Shanghai Electric Apparatus Research Institute, Shanghai Electric Technology Co., Ltd. Electric Division.

Participated in the drafting of this section. Yuyao Goodwin Electronics Co., Ltd. JU Bang Electric Co., Ltd., Chang An Group Co., Ltd., Shanghai

Detecting electrical equipment.

1 Basic Requirements