Any further reproduction without permission is prohibited.

The load conditions specified in this Standard are based on the past experiences over years and the experimental data; however, the load conditions applied to the structural design shall be agreed between the purchaser and the supplier because the load conditions may vary depending on the car operating plan.

NOTE: This Standard is not applicable to the carbody structures of rolling stock for specified railways such as trolley buses with rubber tyres, etc., monorail cars, intermediate capacity transit system cars and magnetic levitation cars.

However, this Standard is applicable to the way of thinking of loads working on the carbody structures of such cars as well as the allowable stress of materials to be used for the carbody structures.

This Standard is applicable to vehicles of rail transport systems, road vehicles powered by an external supply (trolley buses), magnetic levitated vehicles and to the electrical equipment installed in these vehicles.

This Standard does not apply to

— mine railways in underground mines;

— crane installations, moving platforms and similar transport systems on rails;

— funicular railways;

— temporary constructions.

Testing of vehicles against the requirements of this Standard is not included.

NOTE 1 For the relevant tests, see JIS E 4041.

NOTE 2 It is generally accepted that safety depends on human factors, based on the normal behaviour of the operators involved, as well as upon technical factors.

For these reasons, this Standard, in several instances, leaves a choice to the contracting parties [e.g the user or the purchaser and the manufacturer (hereafter referred to as "contracting parties")] between the alternatives which consist either in :

a) the provision of operating rules, regulations and procedures in the instruction manual; or in

b) the application of technical measures such as mechanical or electrical interlocking devices.

A list of the cases for which the contracting parties shall reach agreement before signing the contract is included in Annex A.

NOTE 3 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows :

IEC 61991 : 2000 Rallway applications — Rolling stock — Protective provisions against electrical hazards (MOD)

The symbols which denote the degree of correspondence in the contents between JIS and the corresponding International Standard are IDT (identical), MOD (modified) and NEQ (not equivalent) according to ISO/IEC Guide 21.

— the performance characteristics of electric drives consisting of an inverter, alternating current motors, and the related control system;

— methods of verifying these performance characteristics by tests.

Two categories of combined systems can be considered:

a) alternating current motor(s) fed from an inverter without any control between the mechanical output (torque, speed) and the inverter itself (mostly auxiliary motors, for example cooling fan motors).

The motor works exactly as if it were fed from a busbar (at variable frequency and voltage or not) ;

b) alternating current motor(s) (paralleled or not) with a control between the mechanical output and the inverter.

The category a) of systems is tested according to JIS E 5008 and JIS E 6102.

This Standard applies to the category b), mainly traction drives (see figure 2).

JIS E 6102 applies to convertor-fed alternating current motors, JIS E 5008 to convertors ; JIS E 5006 applies to electronic equipments, and this Standard applies to the combination of motor(s), convertors, and their control system.

As a consequence, JIS E 6102 describes the tests to demonstrate the compliance of the motor to its specification, JIS E 5008 does the same for the convertor.

It is self-evident that some of the tests mentioned in this Standard may in general replace the corresponding ones described in the above-mentioned standards.

An agreement should be reached between the user and the manufacturer (hereafter referred to as "the interested parties") to avoid the duplication of tests (see, for example, the "Possible duplication of test" column in table 1).

A complete combined test is heavy, and often requires high power, which is not always available in a workshop.

An agreement between the interested parties may be reached to allow testing either in the workshop or on the vehicle.

Further, the test items to be performed may be divided into in-the-workshop tests and on-the-vehicle tests.

At the time of drafting this Standard, only the following combinations of motors and inverters have been used for traction applications, but it may also apply to other combinations which may be used in the future:

a) asynchronous motors fed by voltage stiff (voltage source) inverter;

b) synchronous motors fed by voltage stiff (voltage source) inverter;

c) asynchronous motors fed by current stiff (current source) inverter;

d) synchronous motors fed by current stiff (current source) inverter.

The input of these inverters (see figure 2) can be a d.c. supply line or an intermediate d.c. link, which can be obtained from an a.c. line by means of a rectifier or from a d.c. line by means of a chopper or from autonomous supplies (such as on-board generators, accumulators or other electric energy sources).

NOTE 1 The indirect power convertor is "a device to convert input energy to output energy by means of an intermediate link".

Namely, the indirect power convertor is a device which supplies power to motors or other loading devices by means of a narrowly-defined convertor, power rectifier, which is connected with an intermediate dc link and further by means of an inverter (a reverse conversion device) which is connected with the link.

NOTE 2 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows :

IEC 61377-3 : 2002 Railway applications — Rolling stock — Part 3 : Combined testing of alternating current motors, fed by an indirect convertor, and their control system (MOD)

The symbols which denote the degree of correspondence in the contents between JIS and the corresponding International Standard are IDT (identical), MOD (modified) and NEQ (not equivalent) according to ISO/lEC Guide 21.

— the performance characteristics of electric drives consisting of an inverter, alternating current motors, and the related control system;

— methods of verifying these performance characteristics by tests.

Two categories of combined systems can be considered:

a) alternating current motor(s) fed from an inverter without any control between the mechanical output (torque, speed) and the inverter itself (mostly auxiliary motors, for example cooling fan motors).

The motor works exactly as if it were fed from a busbar (at variable frequency and voltage or not) ;

b) alternating current motor(s) (paralleled or not) with a control between the mechanical output and the inverter.

The systems of category a) is tested according to JIS E 5008 and JIS E 6102.

This Standard applies to the category b), mainly traction drives (see figure 1).

JIS E 6102 applies to convertor-fed alternating current motors, JIS E 5008 to power electronic convertors, JIS E 5006 to electronic equipments, and this Standard applies to the combination of ac motor(s), inverter, and their control system.

As a consequence, JIS E 6102 describes the tests to demonstrate the compliance of the motor to its specification, JIS E 5008 does the same for the inverter.

It is self-evident that some of the tests mentioned in this Standard generally may replace the corresponding ones described in the above-mentioned standards.

An agreement should be reached between the user and the manufacturer (hereafter referred to as "the interested parties") to avoid the duplication of tests (see, for example, the "possible duplication of test" column in table 1).

A complete combined test is heavy, and often requires high power, which is not always available in a workshop.

An agreement between the interested parties may be reached to allow testing either in the workshop or on the vehicle.

Testing may be split off partially in a workshop and partially on track.

At the time of drafting this Standard, only the following combinations of motors and inverters were used for traction applications, but it may also apply to other combinations which may be used in the future :

a) asynchronous motors fed by voltage stiff (voltage source) inverter;

b) synchronous motors fed by voltage stiff (voltage source) inverter;

c) asynchronous motors fed by current stiff (current source) inverter;

d) synchronous motors fed by current stiff (current source) inverter.

The input of these inverters can be a d.c. supply line, a rectifier, a chopper, an input convertor, a diesel generator with integrated rectifiers, etc.

NOTE 1 An inverter is "a device to convert dc input energy directly into ac output energy".

NOTE 2 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows:

lEC 61377-1 : 2006 Rallway applications – Rolling stock – Part 1 Combined testing of inverter-fed alternating current motors and their con trol system (MOD)

The symbols which denote the degree of correspondence in the contents between JIS and the corresponding International Standard are IDT (identical), MOD (modified) and NEQ (not equivalent) according to ISO/lEC Guide 21.