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Switching, protection, and distribution in low-voltage networks : handbook with selection criteria and planning guidelines for switchgear, switchboards, and distribution systems

Author: Petra Belzner; Georg Schöllhorn; Siemens Aktiengesellschaft.
Publisher: Munich, Germany : Publicis MCD ; New York, NY, USA : VCH Publishers, 1994.
Edition/Format:   Print book : English : 2nd rev. edView all editions and formats
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Intended for use by planners and designers of low-voltage switchboards, distribution boards and control systems, this text features detailed selection guidelines, as well as project-planning  Read more...

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Schalten, Schützen, Verteilen in Niederspannungsnetzen. English.
Switching, protection and distribution in low-voltage networks.
Erlangen : Publicis MCD, 1994
(OCoLC)606214696
Online version:
Schalten, Schützen, Verteilen in Niederspannungsnetzen. English.
Switching, protection and distribution in low-voltage networks.
Erlangen : Publicis MCD, 1994
(OCoLC)624451871
Material Type: Internet resource
Document Type: Book, Internet Resource
All Authors / Contributors: Petra Belzner; Georg Schöllhorn; Siemens Aktiengesellschaft.
ISBN: 3895780006 9783895780004
OCLC Number: 37004342
Notes: "Editor, Siemens-Aktiengesellschaft"--Title page verso.
Includes index.
Description: 659 pages : illustrations ; 25 cm
Contents: 1. Specifications for low-voltage devices and switchgear assemblies. 1.1 Nomenclature of the standards authorities. 1.2 Low-voltage switchgear and devices. 1.2.1 Summary of specifications and approvals. 1.2.2 Regulations and approvals in European countries. 1.2.3 Standards and approvals in the U.S.A., Canada and Australia. 1.3 Type-tested and partially type-tested switchgear assemblies (TTA and PTTA). 1.3.1 Summary of specifications and standards. 1.3.1.1 Construction specifications. 1.3.1.2 Generic specifications. 1.3.1.3 Equipping specifications. 1.3.1.4 Erection specifications. 1.3.1.5 Relevant DIN standards for switchgear assemblies. 1.4 Protection of persons and material assets. 1.4.1 Protection against direct contact. 1.4.1.1 Protection against electrical shock to DIN VDE 0100. 1.4.1.2 Protection against electrical shock, positioning of operating elements in the vicinity of parts which are dangerous to touch. 1.4.1.3 Measures to be taken in the modification or extension of switchgear assemblies already in service. 1.4.1.4 "Safety separation" with low-voltage switchgear. 1.4.2 Protection against indirect contact. 1.4.2.1 Comments related to the protective measures specific to the network configuration. 1.4.3 Protection by total insulation. 1.4.4 Erection and connection of switch and distribution boards. 1.4.5 Clearances and creepage distances. 1.5 Equipping specifications and relevant standards. 1.5.1 Main switches. 1.5.2 Emergency-off apparatus. 1.5.3 Safety disconnecting switches for mechanical maintenance (service/repair switches). 1.5.4 The electrical equipping of industrial machinery scheduled for export to countries outside Germany. 1.5.5 Colours for pushbuttons, illuminated pushbuttons and indicator lights. 1.5.6 IP degrees of protection against contact with live parts, ingress of foreign bodies and ingress of liquid. 1.5.6.1 IP degrees of protection to DIN and IEC. 1.5.6.2 Degrees of protection according to other national specifications. 1.6 Operating and ambient conditions. 1.6.1 Normal conditions. 1.6.1.1 Ambient temperature. 1.6.1.2 Altitude. 1.6.1.3 Environmental influences. 1.6.1.4 Parameters and pollution levels of the climate classes to IEC 721 and the Siemens standard SN 29070, part 1. 1.6.1.5 Protection against corrosion, type of finish for technical products. 1.6.1.6 Decontaminability. 1.6.1.7 Climatic operating conditions for electronic equipment. 1.6.2 Abnormal conditions for transport, storage and operation. 1.6.2.1 Arduous operating conditions. 1.6.2.2 Influence of , and radiation. 1.6.2.3 Stressing due to vibrations and impact. 1.6.2.4 Measures against the effects of induced vibration. 1.6.2.5 Resistance to termites. 1.6.2.6 Environmental acceptability. 1.6.2.7 Suppression of radio interference. 2 Network data and duty types. 2.1 Network data. 2.1.1 Nominal voltages and frequencies. 2.1.2 Short-circuit current. 2.1.3 Types of short-circuits. 2.1.3.1 Contribution to the short-circuit current by connected motors. 2.1.4 Effects of short-circuit currents. 2.1.5 Diagrams for determining resistance values and short-circuit currents, computer program "KUBS" for short-circuit calculations and product selection. 2.1.6 Influence of the transformers and conductors on the short-circuit current. 2.2 Duty types. 2.2.1 Continuous operation duty. 2.2.2 Short-time operation duty. 2.2.3 Intermittent periodic duty. 2.2.4 Operation at inconsistent loading. 3 Selection criteria for low-voltage switchgear in main circuits. 3.1 Network and operating conditions. 3.1.1 Rated voltage and rated frequency. 3.1.2 Rated short-circuit strength and rated switching capacity. 3.1.3 Rated currents. 3.2 Switching tasks and conditions. 3.2.1 Switching tasks. 3.2.1.1 Disconnection. 3.2.1.2 Off-load switching. 3.2.1.3 On-load switching. 3.2.1.4 Motor switching. 3.2.1.5 Power switching, switching of shortcircuits. 3.2.2 Switching of components in an electrical installation. 3.2.2.1 Starting of low-voltage motors. 3.2.2.2 Switching of high-voltage motors. 3.2.2.3 Switching of capacitors. 3.2.2.4 Switching of electric heating equipment. 3.2.2.5 Switching of lamps in lighting installations. 3.2.2.6 Switching of low-voltage transformers. 3.3 Switching frequency and service life. 3.3.1 Permissible switching frequency. 3.3.2 Mechanical service life. 3.3.3 Electrical service life. 3.3.4 Selection in terms of utilization categories. 3.3.4.1 Selection of contactors. 3.3.4.2 Selection of load switches, disconnectors, on-load disconnectors and combination fuse switch units. 3.4 Protection against overcurrent and excessive temperature rise. 3.4.1 General functions. 3.4.1.1 Protection against overload. 3.4.1.2 Protection against the elects of short-circuits. 3.4.1.3 Protection against excessive temperature rise. 3.4.2 Specifications. 3.4.2.1 Specifications for overload protection devices. 3.4.2.2 Service factors in terms of UL and CSA specifications. 3.4.2.3 Specifications for overcurrent protection devices. 3.4.2.4 Specifications for temperature dependent protection devices. 3.4.3 Protection devices. 3.4.3.1 Fuses. 3.4.3.2 Circuit-breakers. 3.4.3.3 Line-protection (miniature) circuit-breakers. 3.4.3.4 Overload relays. 3.4.3.5 Thermistor motor protection devices. 3.4.3.6 Instantaneous electromagnetic over-current relays. 3.4.4 Switchgear combinations. 3.4.4.1 Swichgear combinations with fuses. 3.4.4.2 Switchgear combinations without fuses. 3.4.4.3 Switchgear combinations with thermistor motor protection devices. 3.4.4.4 Protection properties of switchgear combinations. 3.4.4.5 Comparison between the protection properties of switchgear combinations. 3.4.4.6 Selection of circuit-breakers for power distribution systems with or without fuses. 3.4.5 Protection of plant components. 3.4.5.1 Protection of three-phase induction motors. 3.4.5.2 Protection of conductors and cables outside the switchgear combinations. 3.4.5.3 Protection of transformers. 3.4.5.4 Protection of capacitors. 3.4.6 Discriminative protection (selectivity). 3.4.6.1 Discrimination in radial networks. 3.4.6.2 Use of discrimination tables. 3.4.6.3 Discrimination in meshed networks. 3.5 Protection against overvoltage. 3.5.1 Overvoltage transients associated with vacuum switchgear. 3.5.2 High voltage vacuum contactors, type 3TL6, for the switching of three-phase inductive motors with slip-rings or short-circuited rotors over 1kV up to 12kV. 3.5.3 Vacuum contactors, type 3TF6, for the switching of three-phase induction motors with slip-ring or short-circuited rotors up to 1000V. 3.6 Leakage-current and earth-fault protection. 3.6.1 Construction and method of operation. 3.6.2 Leakage-current circuit-breakers for a.c. and pulsing d.c. leakage currents. 3.6.3 Discriminative leakage-current circuit-breakers. 3.6.4 Product range of Siemens leakage-current circuit-breakers and tripping devices. 3.7 Application of low-voltage switchgear in main circuits. 3.7.1 Parallel and series connection of current path assemblies. 3.7.2 Application of four-pole switchgear. 3.7.3 Influence of network frequency and harmonic currents on the operation of switching devices. 3.7.3.1 Thermal load carrying capacity of the current path assemblies and conductors in dependence of the network frequency. 3.7.3.2 Switching capacity at network frequencies other than 50Hz. 3.7.3.3 Contact service life. 3.7.3.4 Tripping response of releases and relays. 3.7.3.5 The effect of harmonic currents on the tripping response of overload releases and relays. 3.7.3.6 Electrical operating mechanisms for switchgear. 3.7.4 Use of a.c. switchgear in d.c. networks. 3.7.4.1 Load carrying capacity of the current path assemblies. 3.7.4.2 Contact service life. 3.7.4.3 Direct-current switching capacity. 3.7.5 Use of a.c. contactors in networks with square-wave voltages. 3.7.6 Switchgear for the switching of three-phase capacitors. 3.7.6.1 Switching of capacitors with circuit-breakers. 3.7.6.2 Switching of capacitors with contactors. 3.7.6.3 Switching on of single capacitors. 3.7.6.4 Switching of capacitor banks. 3.7.6.5 Switching of capacitors with lower power ratings. 3.7.7 Selection of 3TF and 3TB contactors in terms of contact service life and utilization category. 3.7.8 Selection of 3TF contactors for short-time and intermittent periodic duty. 3.7.9 Selection of contactors for three-phase pole-changing induction motors. 3.7.10 Selection of 3TF and 3TK contactors as well as circuit-breakers for the switching of lamps. 3.7.11 Switching of three-phase transformers up to 1000 V with 3TF contactors. 3.7.12 Starting of three-phase induction motors with slip-ring rotors. 3.7.12.1 3PA3 Oil-cooled starters. 3.7.12.2 Starter and start-control switches. 3.7.13 Starting of three-phase induction motors with stator-resistance starters. 3.7.14 Direct-on-line starting of three-phase induction motors with type 3TW motor starters. 3.7.15 A.C. semiconductor motor controllers and starters, Sikostart 3RW22. 4 Selection criteria for low-voltage switchgear in auxiliary circuits. 4.1 Operating voltages in auxiliary circuits. 4.1.1 Contact reliability in the case of low-voltages. 4.1.2 Voltage instability in auxiliary circuits. 4.2 Operating conditions. 4.2.1 Utilization categories to DIN VDE and IEC. 4.2.2 Special considerations for the selection and the use of low-voltage switchgear in Canada and the USA. 4.2.3 Short-circuit protection in auxiliary circuits. 4.2.4 Short-circuit and overload protection of control transformers. 4.2.5 Thermistor protection in control transformers. 4.3 Operating conditions for low-voltage switchgear in auxiliary circuits. 4.3.1 Prevention of operational down-time in contactor control systems. 4.3.2 Long control conductors - problems and solutions. 4.3.3 Limiting of overvoltage spikes caused by the switching off of contactors (overvoltage suppression). 4.3.3.1 Causes of overvoltages. 4.3.3.2 Overvoltage suppression with RC elements. 4.3.3.3 Overvoltage suppression with diodes. 4.3.3.4 Overvoltage suppression with varistors. 4.3.4 The use of contactor relays in safety circuits. 4.3.5 Selection criteria for low-voltage control transformers. 4.3.5.1 Operating conditions. 4.3.5.2 Duty types. 4.3.5.3 Transformer types. 4.3.6 Application and selection of position switches, type 3SE. 4.3.6.1 Position switches with safety function. 5 Installation, operation and maintenance of low-voltage switchgear. 5.1 Installation. 5.1.1 Mounting aids. 5.1.2 Mounting position. 5.1.3 Clearance for switching-arc gases. 5.2 Termination. 5.2.1 SIGUT termination technique. 5.2.2 Tab connectors. 5.2.3 Box terminals. 5.3 Operation. 5.3.1 Manual operation. 5.3.2 Powered operation. 5.4 Measures to facilitate the checking/replacement of parts and maintenance work. 5.5 Checking the condition of contact pieces in 3TF contactors; assessment criteria. 6 Transducing sensors and signal processing systems. 6.1 Selection criteria for BERO proximity switches. 6.1.1 Inductive and capacitive proximity switches for operating distances up to 65 mm. 6.1.2 Opto-BERO photoelectric proximity switches. 6.1.3 Sonar-BERO ultrasonic proximity switches. 6.2 Electronically compatible control and signalling by low-voltage switchgear. 6.2.1 Reliable operation by electronic output stages. 6.2.2 Adaptation of the operating voltage tolerances. 6.2.3 Overvoltage suppression. 6.2.4 Contact reliability. 6.3 Assessment criteria for electromechanical and electronic controls. 7 Type-tested switchgear assemblies (TTA). 7.1 General. 7.1.1 Versions and designs. 7.1.2 Types of construction. 7.1.3 Selection criteria. 7.2 Switchboards in standardized design. 7.2.1 Introduction. 7.2.2 Standard switchboards Type 8PU. 7.2.3 Transformer load centre (S) substations for up to 24 kV and 1250 kVA. 7.3 Distribution board systems. 7.3.1 8HS sheet-steel enclosed distribution boards. 7.3.2 8HU sheet-steel enclosures. 7.3.3 8HP insulated distribution board system. 7.3.4 8PL insulated busbar trunking system (L-system). 7.3.5 8L mounting and wiring systems for control circuits. 7.3.6 8MF cubicle system for switch, distribution and control boards. 7.4 Guidelines for project planning of lowvoltage switch, distribution and control boards or systems. 7.4.1 General. 7.4.2 8PU low-voltage switchboards. 7.4.3 8HS, 8HP and 8HU distribution systems. 7.4.4 8L. mounting systems for control circuits. 7.4.5 Domestic and utility distribution boards. 7.4.5.1 8GB Small distribution boards. 7.4.5.2 8GD and 8GA STAB wall-mounting/SIKUS floor-standing distribution board systems. 7.4.5.3 8GA SIKUS free-standing distribution board cubicles. 7.4.5.4 SIPRO universal system meter cabinets, meter/distribution cubicles, distribution cabinets, free-standing distribution boards. 7.4.5.5 8MB, 8MM and 8GR cable, distribution and meter cubicles for outdoor use. 7.4.6 Air-conditioning of installations, switchboards and cubicles. 7.4.6.1 General. 7.4.6.2 8ME78 heat exchangers. 7.4.6.3 8MR11 filtered fans. 7.4.6.4 8MR17 refrigeration units. 7.4.6.5 8MR21 heating units. 7.4.6.6 Temperature rise inside insulation material and sheet steel enclosures. 7.4.7 Degrees of protection, climatic and other ambient conditions. 7.4.8 Power factor correction in networks with or without harmonics. 7.4.8.1 Basic principles. 7.4.8.2 Types of power factor correction (reactive power compensation). 7.4.8.3 Power factor correction of three-phase induction motors and transformers. 7.4.8.4 Project planning. 7.4.8.5 Voltage rise caused by capacitors. 7.4.8.6 Compensation in networks with harmonics. 7.4.8.7 The use of audio-frequency remote control systems. 7.4.8.8 Range of products for power factor correction. 7.5 Charging units for stationary standby battery installations. 7.6 Current transformers. 7.6.1 Basic designs. 7.6.2 Current transformers for specific applications. 7.6.2.1 Interposing current transformers. 7.6.2.2 Summation current transformers. 7.6.2.3 Thread-through (or pin-wound) current transformers. 7.6.2.4 Cable or busbar current transformers (split-core c.t.?s). 7.6.2.5 Cast resin current transformers. 7.6.2.6 Explosion-protected current transformers and current transformers for mining applications. 7.6.2.7 Current transformers for protection purposes. 7.6.2.8 Current transformers for power factor correction controllers. 7.6.3 Accuracy classes of current transformers. 7.6.4 Secondary currents of current transformers. 7.6.5 Rated output power and overcurrent factor of current transformers. 7.6.6 Voltages across the secondary terminals of a current transformer. 7.6.7 Selection criteria for current transformers. 7.6.8 Power consumption and losses in current transformer secondary circuits. 8 Fundamental circuit diagrams. 8.1 General information. 8.1.1 Terminal designations. 8.1.2 Graphic symbols according to DIN, ANSI, BS and IEC. 8.1.3 Designation of equipment, conductors and general functions. 8.1.4 Circuit diagrams. 8.1.4.1 Types of circuit diagrams. 8.1.4.2 Making use of the fundamental circuit diagrams or modifying them. 8.1.5 Switching via contactors. 8.1.5.1 Contactors with drop-out delay unit for fluttering command signals. 8.1.5.2 Extended (early-make/late-break) auxiliary contacts in contactors (mainly for d.c. excitation of the coils). 8.1.5.3 Drop-out delay units for contactors. 8.1.5.4 Contactor safety combinations. 8.2 Direct switching of three-phase induction motors. 8.2.1 Switching on and off of three-phase induction motors. 8.2.2 Switch-over of a three-phase induction motor from one supply network to another. 8.2.3 Automatic sequential starting of three-phase induction motors. 8.2.4 Reversing the direction of rotation of three-phase induction motors (reversing starters). 8.2.5 Switching of pole-changing three-phase induction motors. 8.2.5.1 Pole-changing three-phase induction motor with one winding (Dahlander connection), two speeds, one direction of rotation. 8.2.5.2 Pole-changing three-phase induction motor with one winding (Dahlander connection), two speeds, two directions of rotation. 8.2.5.3 Pole-changing three-phase induction motor with two separate windings, two speeds, one direction of rotation. 8.2.5.4 Pole-changing three-phase induction motor with two separate windings, two speeds, two directions of rotation. 8.2.5.5 Pole-changing three-phase induction motor with three speeds, one direction of rotation, one winding in a Dahlander connection, and one separate winding for low speed. 8.2.5.6 Pole-changing three-phase induction motor with three speeds, one direction of rotation, one winding in a Dahlander connection, one separate winding for the intermediate speed. 8.2.5.7 Pole-changing three-phase induction motor with three speeds, one direction of rotation, one winding in a Dahlander connection, one separate winding for high speed. 8.2.5.8 Pole-changing three-phase induction motor with three speeds, two directions of rotation, one winding in a Dahlander connection, one separate winding for low speed. 8.2.5.9 Pole-changing three-phase induction motor with four speeds, one direction of rotation and two separate windings. 8.3 Starting of three-phase induction motors. 8.3.1 Star-delta starting of three-phase induction motors with star contactor, delta contactor and line contactor. 8.3.2 Closed transition star-delta starting of three-phase induction motors. 8.3.3 Four stage star-delta starting. 8.3.4 Star-delta starting of three-phase induction motors in two directions of rotation. 8.3.5 Star-delta starting of three-phase induction motors with power factor correction. 8.3.6 Automatic starting of three-phase squirrel-cage motors via a single-pole stator-resistor (KUSA connection) using a time relay. 8.3.7 Automatic starting of three-phase induction motors via a three-pole stator-resistor using a time relay. 8.3.8 Automatic starting of three-phase slip-ring motors. 8.3.9 Closed transition autotransformer starting of three-phase squirrel-cage motors (Kornd?rfer connection). 8.4 Circuits with thermistor motor protection. 8.4.1 Thermistor motor protection with positive. temperature coefficient (PTC) temperature sensors. 8.4.1.1 Thermistor motor protection for a pole-changing three-phase induction motor with two separate windings and two speeds. 8.4.1.2 PTC thermistor motor protection for alarm and switch-off of a three-phase induction motor with six sensors via a circuit-breaker for motor protection equipped with overload and short-circuit releases. 8.4.1.3 Thermistor motor protection for the switching off of six three-phase induction motors via contactors. 8.4.2 Thermistor motor protection with negative temperature coefficient (NTC) temperature sensors. 8.5 Circuits with monitors. 8.5.1 Circuits with speed monitors. 8.5.1.1 Direct-on-line starting of three-phase induction motors. Stopping by reverse-current braking (plug braking). 8.5.1.2 Direct-on-line starting of three-phase induction motors. Stopping by reverse-current braking (plug braking). Circuit with contactor relay. 8.5.1.3 Direct reversal of three-phase induction motors with reverse-current or plug braking in both directions of rotation. 8.5.2 Circuits with conveyor belt monitors. 8.5.3 Circuits of contactor control systems with pressure monitors. 8.6 Circuits with position switches. 8.6.1 Reverser circuits with position switches (e.g. gate control). 8.6.2 Position switches with indicator lights. 8.7 Terminal blocks. 8.7.1 Circuits with isolating terminal blocks for current transformers. 8.7.2 Circuit-breaker terminals for auxiliary circuits. 8.8 Circuits with leakage-current (residual-current) protective devices. 8.9 Interface units. 8.10 Auxiliary circuits incorporating time relays. 8.10.1 Star-delta starting of three-phase induction motors with star contactor, delta contactor, line contactor and time relay. 8.10.2 Functions of the motor-driven time relay 7PR4140. 8.11 Switching of an electrical heating system using a thermostat and contactor combination. 8.12 Stand-by power supply installations. 8.12.1 Three-pole change-over from network supply to stand-by supply using contactors (generator operation). 8.12.2 Change-over from network supply to stand-by supply with four-pole disconnection of the distribution system via two three-pole contactors. 8.13 Project planning and engineering aids. 9 Appendix. 9.1 Fundamental equations, characteristic quantities and units of electricity. 9.1.1 Fundamental equations of electrical engineering. 9.1.2 Characteristic quantities and units of electricity in accordance with DIN VDE and IEC. 9.1.3 Differences in the IEC 157-1 and IEC 947-2 publications. 9.1.4 Equation symbols and SI units International System of Units (SI). 9.1.5 Conversion of international, British and American units. 9.2 Enclosures for electrical equipment to American and Canadian standards. 9.3 Climatic values, influence of temperature and thermal conduction. 9.3.1 Climatic values. 9.3.2 Effects of temperature and thermal conduction. 9.4 Current carrying capacity and overcurrent protection of insulated wires, cables and busbars. 9.4.1 Coordination of protection devices. 9.4.1.1 Overload protection. 9.4.1.2 Short-circuit protection. 9.4.2 Current carrying capacity. 9.4.3 Load ratings of insulated conductors at ambient temperatures of 30? to 70 ?C and the assignment of cable protection fuses in accordance with USA and Canadian standards. 9.4.4 Thermal ratings of busbars and device terminals. 9.4.5 Resistance of copper and aluminium conductors. 9.5 Rated currents of three-phase induction motors. 9.6 Three-phase power transformers. 9.6.1 Graphic symbols and vector groups of three-phase power transformers. 9.7 Tripping behaviour of line protection and switchgear protection devices. 9.7.1 Time-current tripping characteristics of circuit-breakers, miniature circuit-breakers and overload relays. 9.7.2 Pre-arcing time-current characteristics of fuses (operating classes gL/gG and aM). 9.7.3 Characteristic curves and tripping behaviour of circuit-breakers. 9.7.4 Current-limiting diagrams of fuses. 9.7.5 Discrimination (selectivity) between fuses and circuit-breakers. 9.8 Short-circuit currents. 9.8.1 Limiting effect of conductors and cables on short-circuit currents. 9.8.2 Dynamic forces created by short-circuit currents. 9.9 Number of switching operations of switching devices subjected to different operating periods per day. 9.10 International network voltages and frequencies. 9.11 EC guidelines for low voltage equipment. 9.12 Glossary - Brief explanations of some technical terms. 9.13 Addresses of important specification, standards and testing bodies. Index.
Responsibility: [coordination, Georg Haberl ; editing, Georg Schöllhorn ; translation, Jan Dommisse ; authors, Petra Belzner and others].
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   schema:name "Basse tension--Guides, manuels, etc"@fr ;
    .

<http://experiment.worldcat.org/entity/work/data/898091107#Topic/interrupteurs_electriques_guides_manuels_etc> # Interrupteurs électriques--Guides, manuels, etc
    a schema:Intangible ;
   schema:name "Interrupteurs électriques--Guides, manuels, etc"@fr ;
    .

<http://experiment.worldcat.org/entity/work/data/898091107#Topic/niederspannungsanlage> # Niederspannungsanlage
    a schema:Intangible ;
   schema:name "Niederspannungsanlage"@en ;
    .

<http://experiment.worldcat.org/entity/work/data/898091107#Topic/niederspannungsschalter> # Niederspannungsschalter
    a schema:Intangible ;
   schema:name "Niederspannungsschalter"@en ;
    .

<http://experiment.worldcat.org/entity/work/data/898091107#Topic/niederspannungsverteiler> # Niederspannungsverteiler
    a schema:Intangible ;
   schema:name "Niederspannungsverteiler"@en ;
    .

<http://experiment.worldcat.org/entity/work/data/898091107#Topic/regulateurs_electriques_guides_manuels_etc> # Régulateurs électriques--Guides, manuels, etc
    a schema:Intangible ;
   schema:name "Régulateurs électriques--Guides, manuels, etc"@fr ;
    .

<http://id.worldcat.org/fast/905344> # Electric networks--Equipment and supplies
    a schema:Intangible ;
   schema:name "Electric networks--Equipment and supplies"@en ;
    .

<http://id.worldcat.org/fast/905922> # Electric switchgear
    a schema:Intangible ;
   schema:name "Electric switchgear"@en ;
    .

<http://viaf.org/viaf/12978695> # Georg Schöllhorn
    a schema:Person ;
   schema:familyName "Schöllhorn" ;
   schema:givenName "Georg" ;
   schema:name "Georg Schöllhorn" ;
    .

<http://viaf.org/viaf/156622677> # Siemens Aktiengesellschaft.
    a schema:Organization ;
   schema:name "Siemens Aktiengesellschaft." ;
    .

<http://viaf.org/viaf/37588347> # Petra Belzner
    a schema:Person ;
   schema:familyName "Belzner" ;
   schema:givenName "Petra" ;
   schema:name "Petra Belzner" ;
    .

<http://worldcat.org/isbn/9783895780004>
    a schema:ProductModel ;
   schema:isbn "3895780006" ;
   schema:isbn "9783895780004" ;
    .

<http://www.worldcat.org/oclc/606214696>
    a schema:CreativeWork ;
   rdfs:label "Switching, protection and distribution in low-voltage networks." ;
   schema:description "Online version:" ;
   schema:isSimilarTo <http://www.worldcat.org/oclc/37004342> ; # Switching, protection, and distribution in low-voltage networks : handbook with selection criteria and planning guidelines for switchgear, switchboards, and distribution systems
    .

<http://www.worldcat.org/oclc/624451871>
    a schema:CreativeWork ;
   rdfs:label "Switching, protection and distribution in low-voltage networks." ;
   schema:description "Online version:" ;
   schema:isSimilarTo <http://www.worldcat.org/oclc/37004342> ; # Switching, protection, and distribution in low-voltage networks : handbook with selection criteria and planning guidelines for switchgear, switchboards, and distribution systems
    .

<http://www.worldcat.org/title/-/oclc/37004342>
    a genont:InformationResource, genont:ContentTypeGenericResource ;
   schema:about <http://www.worldcat.org/oclc/37004342> ; # Switching, protection, and distribution in low-voltage networks : handbook with selection criteria and planning guidelines for switchgear, switchboards, and distribution systems
   schema:dateModified "2018-03-11" ;
   void:inDataset <http://purl.oclc.org/dataset/WorldCat> ;
    .


Content-negotiable representations

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