SAFETY OF MACHINERY - ELECTRICAL EQUIPMENT OF MACHINES - PART 11: REQUIREMENTS FOR HV EQUIPMENT FOR VOLTAGES ABOVE 1000 V A.C. OR 1500 V D.C. AND NOT EXCEEDING 36 KV
International Electrotechnical Committee
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 General requirements
4.1 General considerations
4.2 Selection of electrical equipment
4.3 Electrical supply
4.4 Physical environment and operating conditions
4.5 Transportation and storage
4.6 Provisions for handling
4.7 Installation
5 Incoming supply conductor terminations, devices for
disconnecting and switching off, and means for earthing
5.1 Incoming supply conductor terminations
5.2 Supply disconnecting (isolating) devices and
means for earthing
5.3 Devices for switching off for prevention of
unexpected start-up
5.4 Devices for disconnecting and means for earthing
HV equipment
5.5 Protection against unauthorized, inadvertent
and/or mistaken operation
6 Protection against electric shock
6.1 General
6.2 Protection against direct contact
6.3 Protection against indirect contact
7 Protection of HV equipment
7.1 General
7.2 Overcurrent protection
7.3 Earth fault protection
7.4 Protection against overvoltages due to lightning
and to switching surges
7.5 Protection against other abnormal conditions
8 Equipotential bonding
8.1 General
8.2 Protective bonding circuit
9 Control circuits and control functions
10 Operator interface and machine-mounted control devices
11 Electronic equipment
12 Controlgear: location, mounting, and enclosures
12.1 General requirements
12.2 Location and mounting
12.3 Degrees of protection
12.4 Enclosures, doors and openings
12.5 Access to HV equipment
13 Conductors and cables
13.1 General requirements
13.2 Conductors
13.3 Insulation and sheath materials
13.4 Current-carrying capacity in normal service
13.5 Conductor and cable voltage drop
13.6 Minimum cross-sectional area
13.7 Flexible cables
13.8 Conductor wires, conductor bars and slip-ring
assemblies
14 Wiring practices
14.1 Connections and routing
14.2 Identification of conductors
14.3 Flexible cables
14.4 Plug/socket combinations
14.5 Dismantling for shipment
14.6 Cable trays
15 Electric motors and associated equipment
15.1 General
15.2 Motor connection boxes
16 Accessories
16.1 Accessories for earthing and short-circuiting
live parts
16.2 Voltage detectors
16.3 Accessories for safe working
17 Marking, warning signs and reference designations
17.1 General
17.2 Warning signs
18 Technical documentation
19 Testing and verification
19.1 General
19.2 Earthing system tests
19.3 Insulation resistance tests
19.4 Voltage tests
19.5 Functional tests
19.6 IP tests for HV equipment outside electrical
operating areas
19.7 Retesting
Annex A (informative) Examples of machines covered by this
part of IEC 60204
Annex B (informative) Inquiry form for the HV equipment of
machines
Annex C (informative) Method of calculation for the cross-
sectional area of bare protective
conductors in supply systems with
direct earthing or low impedance
earthing of the neutral
Annex D (informative) Relationship between cable rated
voltages and highest voltage for HV
equipment
Annex E (informative) Rationalization of the use of terms
relating to earthing and protective
bonding
Index
Figure 1 - Block diagram of a machine containing HV equipment
Figure 2 - Example of the equipotential bonding (see 3.15)
for electrical equipment of a machine
Figure E.1 - Explanation of the terms relating to earthing
and protective bonding
Table 1 - Cross-sectional area of bare protective conductors
Table 2 - Maximum allowable conductor temperatures under
normal and short-circuit conditions
Table 3 - Derating factors for cables wound on drums
Applicable to electronic and electrical equipment and systems of machines, including a group of machines working together in a coordinated manner, but excluding higher level system aspects such as communication between systems. Applies to equipment, or parts of equipment operating with nominal supply voltages above 1 000 V a.c. or 1 500 V d.c. and not exceeding 36 kV a.c. or d.c. with nominal frequencies not above 200 Hz. Special requirements may be needed for higher frequencies or voltages. This is an application standard and is not intended to inhibit or limit technological advancement. Does not cover all the criteria, i.e. interlocking, guarding or control required by other standards to safeguard personnel from hazards other than electrical.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 44 |
| Superseded By |
|
