GB 16895.31-2008Electrical installations of buildings -- Part 7-717: Requirements for special installations or locations -- Mobile or transportable units (English PDF)

Foreword

GB (/ T) all the technical content of this section 16895 is mandatory.

GB (/ T) 16895 "Electrical installations of buildings" series of national standards are divided into the following five sections.

--- Part 1. Fundamental principles, assessment of general characteristics and definitions

--- Part 4. Security

--- Part 5. Selection and erection of electrical equipment

--- Part 6. Inspection Requirements for special installations or locations. --- Part 7 this is Part 7. Requirements for special installations or locations in the 717 section.

This section identical with IEC 60364-7-717:2001 "Electrical installations of buildings - Part 7-717. Requirements for special installations or locations Unit mobile or transportable "(in English).

This part of IEC 60364-7-717:2001 on the same technical content, but contains the following editorial changes.

a) the decimal symbol instead of using decimal notation ",". ",";

b) using the "part" instead of "this International Standard";

c) by deleting the IEC standard "Preface." this part of the reg number and IEC 60364-7-717:2001 exactly.

This part of the National Standardization Technical Committee of electrical building equipment (SAC/TC205) and focal points.

This section is responsible for drafting unit. electrical machines in Design and Research Institute.

Participated in the drafting of this section. Beijing Institute of Architectural Design.

Introduction

GB/T 16895 requirements of this part is to supplement, modify or replace the GB/T 16895 General requirements for other parts of some content.

This part of the terms of the numbers follow GB/T 16895 mode and make the appropriate references.

Dedicated 7-717 number connected to the later part of the GB/T 16895 corresponding part numbers or terms of numbers.

GB /chapters, sections or strips T 16895 in this section are not listed, it means that the GB/T 16895 of the corresponding general requirements still apply use.

GB 16895.31-2008/IEC 60364-7-717:2001 Electrical installations of buildings Requirements for special installations or locations. Section 7-717 Transportable unit or movement or transportable unit 717 moves

717.1 Scope

GB (/ T) the special requirements of this section 16895 of the provisions applicable to mobile or transportable units.

In this section the term "unit" refers to a vehicle and/or mobile or transportable structure in which the entire or part of the fitted Electrical installations.

These units are.

--- Movable type, for example, the vehicle (the drive itself or towed);

--- Or transportable type, for example, placed on the base of the box.

Examples of its application, such as broadcasting vehicles, medical service vehicles, advertising vehicles, fire trucks, construction vehicles and the like.

Two or more units can be connected together electrically.

These requirements do not apply to.

--- Generators;

--- Marina and yachts;

--- GB 5226.1 mobile machinery;

--- Electric vehicle traction equipment.

Additional requirements for other parts of Section 7, for example showers, medical facilities and other additional requirements, if applicable, should also be considered for this section.

717.2 Normative references the following documents contain provisions which, through GB (/ T) referenced in this section 16895, constitute provisions of this part. For dated references Documents, all subsequent amendments (not including errata content) or revisions do not apply to this section; however, encouraged to reach under this section Research into whether the parties to the agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.

GB 2099.1 plugs and sockets for household and similar purposes - Part 1. General Requirements (GB 2099.1-2008, IEC 60884-1.

2006, MOD)

GB/T 5013.4-2008 rated voltage of 450/750V and below rubber insulated cables Part 4. Cords and flexible cables (Idt IEC 60245-4:2004, IDT) GB/T 5023.3-2008 rated voltage of 450/750V and below PVC insulated cables - Part 3. No fixed wiring Sheathed cables (IEC 60227-3:1997, IDT) GB/T 5023.4-2008 rated voltage of 450/750V and below PVC insulated cables Part 4. Fixed wiring protection Cables (IEC 60227-4:1997, IDT) GB/T 5226.1-2000 Safety of machinery electrical equipment. Part 1. General requirements (idt IEC 60204-1:1997) GB/T 11918-2001 industrial plug and socket couplers - Part 1. General requirements (idt IEC 60309-1:1999) GB/T 11919-2001 industrial plug and socket coupling - Part 2. Dimensions plug pin and sleeve mutual electrical accessories in other requirements (idt IEC 60309-2:1999) GB 16895.31-2008/IEC 60364-7-717:2001 GB/T 14823.2-1993 Electrical installation rigid insulation conduit duct special requirements (neqIEC 60614-2-2. 1980) Part 5 GB 16895.20-2003 Electrical installations of buildings. Selection and erection of electrical equipment Chapter 55. Other equipment System 551. Low-voltage power equipment (IEC 60364-5-551:1994, IDT) Part 4-41 GB 16895.21-2004 Electrical installations of buildings. Protection for safety Protection against electric shock (IEC 60364-4-41.

2001, IDT)

GB 19212.1-2003 Safety of power transformers, power supply units and similar products - Part 1. General requirements and tests (Idt IEC 61558-1:1997) GB/T 17045-2008 General Protection against electric shock devices and equipment (IEC 61140:2001 + IEC 61140A1.2004, IDT) IEC 60364-7 (all parts), Electrical installations of buildings Part 7. Requirements for special installations or locations IEC 60614-2-3:1990 Electrical apparatus duct Technical specifications - Part 2. Particular requirements for conduit section 3. Insulation Material soft catheter

717.3 General Characteristics Assessment 717.31 purpose, structure and power supply

717.312 Distribution System type 717.312.2 grounding system type Note. In this section indicated the use of premises TN, TT or IT systems, it means only protection principle of the system is suitable.

717.312.2.1 TN system in any unit, it does not allow the use of TN-C system.

717.313 Power

Available in the following manner to the power supply unit.

a) Power supply in line with GB 16895.20-2003 pick from a low-pressure power generation equipment (see Figure 717A.1 and 717A.2), or

b) Power supply from fixed electrical contact means having an effective protection measures (see Figure 717B.1 and 717B.2), or

c) power supply connection from fixed electrical apparatus used in line with GB/T 17045-2008 simple segregation of power supply (see Figure 717C.1,

Figure 717C. 2 and 717C. 3), or

d) power supply connection from fixed electrical installations, the use of electric-powered segregation policy (see the example 717D).

Note 1. in a), b) and c) of the cases, it may require grounding.

Note 2. In Fig. 717C. Under 1, you may need to set the ground for protection purposes pole (see 717.413.1.5.3).

Note 3. When using the IT equipment within the unit, or when necessary to reduce electromagnetic interference, simple-delimited or separated electrical protection is appropriate.

Can be used in line with a), b), c) or d) any way to the power supply unit, or by way of a) one of the other combinations with their powered by.

Power supply, connect the device or separator device may be disposed within the unit.

717.4 Security

717.41 Protection against electric shock 717.412 direct contact protection 717.412.4 not permitted outside the scope of protection placed outriggers.

717.412.5 unit for the external power supply socket for an electrical equipment with a rated residual operating current not exceeding 30mA remaining electric Flow protection as an additional protection, except in one of the following protection circuit power supply socket.

--- SELV;

--- PELV;

--- Electrical separation.

717.413 indirect contact protection 717.413.1 automatic power-off protection

a) in accordance with a 717.313) when the power supply, allowing only the use of TN and IT systems, and shall be automatically cut off the power supply of protective measures;

GB 16895.31-2008/IEC 60364-7-717:2001 and.

--- In the TN system, shall comply with the provisions of 717.413.1.3;

--- In the IT system, it shall comply with the provisions of 717.413.1.5.

b) in accordance with b 717.313) when the power supply, allowing only the use of TN and TI systems, and automatically cut off the power supply should be rated residual move as current does not exceed 30mA residual current protector. When the loop is in the inner unit having a non-conductive housing, and using non-contact Local equipotential ground when coupling protection, without this request (see Figure 717B.2).

In all cases, within a unit installed in the power supply and provide automatic power-off protection c) said at 717.313 a) to d) any electrical equipment between care, including the protection of electrical itself included, should be used Class II equipment or equivalent equipment for insulation protection.

717.413.1.2 equipotential bonding

717.413.1.2.1 Equipotential Bonding Accessible conductive parts of the unit, such as chassis, body structure or piping system should be connected to each other, and by the total equipotential bonding conductor Connected to the protective conductor unit of TT, IT or TN system.

Equipotential bonding conductor should be well-stranded conductors, in line type 227IEC 02 GB/T 5023.3-2008 requirements are combined Appropriate.

717.413.1.3 TN system 717.413.1.3.1 unit having a conductive housing when using the TN system and in accordance with 717.313 for a) or c) supply, the housing should be connected to the neutral point. If there is no neutral point is connected to a phase conductor (see Figure 717A.1, FIG 717A.2 and 717C.3).

Within no conductive housing unit adopts TN system, the exposed conductive parts inside the unit should be used to protect the equipment connected to the line Neutral point, if there is no neutral point, connected to a live conductor.

717.413.1.5 IT systems Within 717.413.1.5.3 unit having a conductive housing when using IT systems, exposed conductive parts shall be connected to the conductive device shell.

No conductive housing units exposed conductive parts within the unit should be connected to each other and to the protective conductor.

IT systems can be composed of the following forms.

a) a low-voltage isolation transformer or power generation equipment, and installation of insulation monitor;

b) the use of a transformer with a simple partition, for example, according to IEC 61558-1 regulations and meet one of the following requirements.

--- Install insulation monitor has been set or no grounding, can occur in the first fault between live parts and the frame unit Auto power off (see Figure 717C.2);

--- Installation of residual current protection and grounding, so that when a ground fault occurs in a simple separated transformer can automatically cut off Power supply (see Figure 717C.1). In each equipment unit for external use should be separate residual current protective devices to protect its Rated residual operating current not exceeding 30mA.

717.413.5 electrically separated protection (See Fig. 717D).

717.473 overcurrent protection 717.473.3 determined in accordance with circuit protection Type

717.473.3.1 When the power supply in line with 717.313 in a) or c), and the phase conductor is connected to the conductive housing unit may be, the this unit can be connected to a phase conductor of the conductive housing, does not require the installation of an overcurrent protection device.

Selection and installation of electrical equipment 717.5

717.51 General

717.514 Identification Users should be visible on the unit where to put signs posted by the type of power supply described unmistakable terms that can be connected.

Use description method given in 717.313.

GB 16895.31-2008/IEC 60364-7-717:2001 717.52 cabling system 717.52.01 unit should not be less than 2.5mm2 cross section and in accordance with GB/T 5013.4-2008 245 copper cable or equivalent design the cable is connected to the power supply. May be insulated flexible cable bushings and other accessories introduced into cells in order to reduce damage or insulation failure , Since insulation can cause damage or malfunction of the unit exposed conductive parts live. Cable sheath should be firmly clamped or fixed to a single Yuan.

717.52.02 The following cable type or other type equivalent that allows for internal wiring unit.

a) comply with GB/T 5023.3-2008 of PVC insulated single-core cables or laid in line with GB 14823.2-1993 and IEC 60614-2-3:1990 catheter.

b) If you take precautions to make mechanical damage due to sharp points or less prone to cause friction, can be used in line with GB/T 5023.4-2008 of PVC insulated sheathed cables or in compliance with GB/T 5013.4-2008 245 type sheathed cables.

Of this section do not apply to information technology equipment.

717.55 Other equipment 717.55.01 plugs and sockets should be consistent with GB/T 11918-2001 or GB 2099.1 requirements.

Connecting devices to the power supply unit and should be consistent with GB/T 11919-2001 and the following requirements.

--- Plug should have the shell of insulating material;

--- If the unit is located outside, plugs and sockets should have at least IP44 degree of protection;

--- Power line and the shell should have at least IP55 degree of protection;

--- Plug portion should be located on the unit.

717.55.02 unit outside of the socket should be not less than the degree of protection IP54 enclosure.

NOTE. automatically cut off power to protect the use of residual current protective devices (RCD).

Figure 717A. Example 1. Power supply connection from class I or II type low-voltage power generation equipment,

Units installed in the unit, set or no grounding GB 16895.31-2008/IEC 60364-7-717:2001

Figure 717A. Example 2. Power supply connection from II type low-voltage power generation equipment, the unit is attached to the outer unit

Figure 717A. 1 and 717A. 2 Symbol Description.

1c compliance with IEC 60364-5-551 unit is connected to a low-pressure power generation equipment

2 II type of equipment or its equivalent insulative housing (first automatically cut off power protection contained therein) 4 conductive ladder (if any) 5 neutral (if there is no neutral point, for the phase conductor) and the unit can be connected between the conductive structures 6 within the cell specifically for electrical sockets 7 comply with the requirements of 717.413.1.2.1 total equipotential If the mast when 7a, connected to the rod 7b is connected to an external conductive ladder (if any), the step in contact with the ground 7c and functional grounding connection (if needed) 7d connected to the device unit may be conductive housing 7e and protective grounding connection (if any) Electrical equipment supply unit 10 outside the outlet Electrical equipment within the unit 13 14 overcurrent protective devices (if needed) 15 overcurrent protective devices (such as circuit breakers) 16a is used to automatically cut off the residual current protection unit outer loop power supply device, which does not exceed the rated residual operating current 30mA Residual current protection device 16b is used to automatically cut off the power supply to protect the equipment inside the unit circuit 18 total ground terminal or busbar GB 16895.31-2008/IEC 60364-7-717:2001

Figure 717B. Example 1. Power supply connection using any type of fixtures from the grounding system,

Use a residual current protection device automatically cut off power protection, set or no grounding

Figure 717B. Example 2. Same as Figure 717B. Example 1, but the unit has an internal non-conductive

Shell, use ungrounded equipotential bonding for protection GB 16895.31-2008/IEC 60364-7-717:2001

Figure 717B. 1 and 717B. 2 illustrates the symbols.

1b is connected to the unit with a power supply effective protection measures

2 II type of equipment or its equivalent insulative housing (first automatically cut off power protection contained therein) 2a non-conductive environment 4 conductive ladder (if any) 6 within the cell specifically for electrical sockets 7 comply with the requirements of 717.413.1.2.1 total equipotential If the mast when 7a, connected to the rod 7b is connected to an external conductive ladder (if any), the step in contact with the ground 7c and functional grounding connection (if needed) 7d connected to the device unit may be conductive housing 7e and protective grounding connection (if any) Electrical equipment supply unit 10 outside the outlet Electrical equipment within the unit 13 14 overcurrent protective devices (if needed) 15 overcurrent protective devices (such as unipolar or polar phase and neutral pole circuit breaker) 16a is used to automatically cut off the residual current protection unit outer loop power supply device, which does not exceed the rated residual operating current 30mA Residual current protection device 16b is used to automatically cut off the power supply to protect the equipment inside the unit circuit 18 total ground terminal or busbar 20 in line with GB 413.4 ungrounded 16895.21-2004 in the local equipotential GB 16895.31-2008/IEC 60364-7-717:2001

Figure 717C. Example 1. Power supply connection from simple separating transformers,

Grounding system can be any type of fixtures (when using IT systems need to set up a ground electrode)

Figure 717C. Example 2. Power supply connection from simple separating transformers,

Using an insulation monitor IT systems, in the first Ground fault cut off the power supply provided or not provided grounding

Figure 717C. Example 3. Power supply connection from simple

Separating transformer, a TN system EC, set or not set grounding GB 16895.31-2008/IEC 60364-7-717:2001

Figure 717C. 1, FIG. 717C. 2 and 717C. 3. Explanation of symbols.

1a cells by 717.313c) connected to the separator through a simple transformer power supply

2 II type of equipment or its equivalent insulating housing, the first automatic cut off power protection (see section 8 or item 9) contained therein 4 conductive ladder (if any) 5 neutral (if there is no neutral point, for the phase conductor) and the unit can be connected between the conductive structures 6 within the cell specifically for electric sockets;

7 Comply with the requirements of 717.413.1.2.1 total equipotential

If the mast when 7a, connected to the rod 7b is connected to an external conductive ladder (if any), the step in contact with the ground 7c and functional grounding connection (if needed) 7d connected to the device unit may be conductive housing 7e and protective grounding connection (if any) 8 off the power supply of electrical protection, if needed, for the second time overcurrent protection or ground fault Cut off the power supply for overcurrent protection device 9 and the second earth fault 10a power supply unit to the outside of the three-phase electrical equipment socket 10b supply electrical equipment to the unit outside the single-phase socket 13 special unit of electrical equipment 14 overcurrent protection device (if needed) 16a is used to automatically cut off the residual current protection unit outer loop power supply device, which does not exceed the rated residual operating current 30mA Residual current protection device 16b is used to automatically cut off the power supply to protect the equipment inside the unit circuit 18 total ground terminal or busbar 21 to power electrical equipment such as transformers 220V 25 insulation monitor GB 16895.31-2008/IEC 60364-7-717:2001

Figure 717D Example. power supply connected to a fixed electrical installations himself type grounding system,

Galvanic isolation transformer separating protection 717D in FIG Symbol Description.

1a connected to the unit via the electrical power supply transformer separated

2 II type of equipment or its equivalent insulative housing (first automatically cut off power protection contained therein) 4 conductive ladder (if any) 6 within the cell specifically for electrical sockets Cut off the power supply 8 protective devices (if needed) for the second time overcurrent protection or ground fault 10 power to the outlet unit outside of electrical equipment in line with the 413.5.3.1 11 GB insulated ungrounded 16895.21-2004 equipotential Electrical equipment within the unit 13 14 overcurrent protective devices (if needed) 21 to power electrical equipment such as transformers 220V GB 16895.31-2008/IEC 60364-7-717:2001