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General Safety Instructions for High Voltage Machines

High Voltage Safety

General Safety Instructions for High Voltage Machines

• W. Maes

Department of Marine Engineering Antwerp Maritime Academy

HV, 2015

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines

Outline

1

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Outline

1

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

General Safety Instructions - Machines

Electric machines have dangerous live and rotating parts and may have hot surfaces. All operations serving, transport, installation, connection, commissioning, operation and maintenance shall be carried out by responsible skilled people

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

Figure : De-energize

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

Figure : Isolate the circuit from the power source

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

Figure : Provide safeguard against reclosing

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

Figure : Connect to earth and short

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

Before starting with the job: The following rules must be strictly applied: De-energize Verify safe isolation from supply Provide safeguard against reclosing Connect to earth and short Cover or provide barriers against neighbouring live parts

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

Before starting with the job: The following rules must be strictly applied: De-energize Verify safe isolation from supply Provide safeguard against reclosing Connect to earth and short Cover or provide barriers against neighbouring live parts

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

Before starting with the job: The following rules must be strictly applied: De-energize Verify safe isolation from supply Provide safeguard against reclosing Connect to earth and short Cover or provide barriers against neighbouring live parts

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

Before starting with the job: The following rules must be strictly applied: De-energize Verify safe isolation from supply Provide safeguard against reclosing Connect to earth and short Cover or provide barriers against neighbouring live parts

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

Before starting with the job: The following rules must be strictly applied: De-energize Verify safe isolation from supply Provide safeguard against reclosing Connect to earth and short Cover or provide barriers against neighbouring live parts

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

De-energize auxiliary circuits (for example space heaters)! Note rating plate markings and connection diagram in the terminal box!

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

De-energize auxiliary circuits (for example space heaters)! Note rating plate markings and connection diagram in the terminal box!

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

Figure : safe and permanent electric connection??

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

Figure : always use cablelugs on flexible cable

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

The connection must be made in a way that a safe and permanent electric connection can be maintained Use appropriate cable terminals Establish and maintain safe equipotential bonding

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

The connection must be made in a way that a safe and permanent electric connection can be maintained Use appropriate cable terminals Establish and maintain safe equipotential bonding

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

The connection must be made in a way that a safe and permanent electric connection can be maintained Use appropriate cable terminals Establish and maintain safe equipotential bonding

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

Figure : Establish and maintain safe equipotential bonding

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

Figure : Air clearance for HV (IACS)

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

Figure : creepage distances (IACS)

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

The clearances between High Voltage unisolated live parts and between such parts and earth must not be below the values of appropriate standards (minimal) and values given in the manufacturer’s documentation No foreign bodies, dirt or moisture is allowed in the terminal box Close unused cable entrance holes and the box itself in a dust- and watertight manner.(maintain its IP rating) Lock the key when the machine is run without coupling

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

The clearances between High Voltage unisolated live parts and between such parts and earth must not be below the values of appropriate standards (minimal) and values given in the manufacturer’s documentation No foreign bodies, dirt or moisture is allowed in the terminal box Close unused cable entrance holes and the box itself in a dust- and watertight manner.(maintain its IP rating) Lock the key when the machine is run without coupling

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

The clearances between High Voltage unisolated live parts and between such parts and earth must not be below the values of appropriate standards (minimal) and values given in the manufacturer’s documentation No foreign bodies, dirt or moisture is allowed in the terminal box Close unused cable entrance holes and the box itself in a dust- and watertight manner.(maintain its IP rating) Lock the key when the machine is run without coupling

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

The clearances between High Voltage unisolated live parts and between such parts and earth must not be below the values of appropriate standards (minimal) and values given in the manufacturer’s documentation No foreign bodies, dirt or moisture is allowed in the terminal box Close unused cable entrance holes and the box itself in a dust- and watertight manner.(maintain its IP rating) Lock the key when the machine is run without coupling

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Electrical Connections - Safety Rules

Figure : Lock the key when the machine is run without coupling

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Operation - Safety Rules

In case of deviations from normal operation, for example, elevated temperture, noises, vibrations - disconnect machine, if in doubt Establish cause and consult manufacturer, if necessary. Do not defeat protective devices, not even in trial run. In case of heavy dirt deposits, clean cooling system at regular intervals. Open blocked condensate drain holes from time to time.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Operation - Safety Rules

In case of deviations from normal operation, for example, elevated temperture, noises, vibrations - disconnect machine, if in doubt Establish cause and consult manufacturer, if necessary. Do not defeat protective devices, not even in trial run. In case of heavy dirt deposits, clean cooling system at regular intervals. Open blocked condensate drain holes from time to time.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Operation - Safety Rules

In case of deviations from normal operation, for example, elevated temperture, noises, vibrations - disconnect machine, if in doubt Establish cause and consult manufacturer, if necessary. Do not defeat protective devices, not even in trial run. In case of heavy dirt deposits, clean cooling system at regular intervals. Open blocked condensate drain holes from time to time.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Operation - Safety Rules

In case of deviations from normal operation, for example, elevated temperture, noises, vibrations - disconnect machine, if in doubt Establish cause and consult manufacturer, if necessary. Do not defeat protective devices, not even in trial run. In case of heavy dirt deposits, clean cooling system at regular intervals. Open blocked condensate drain holes from time to time.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Operation - Safety Rules

In case of deviations from normal operation, for example, elevated temperture, noises, vibrations - disconnect machine, if in doubt Establish cause and consult manufacturer, if necessary. Do not defeat protective devices, not even in trial run. In case of heavy dirt deposits, clean cooling system at regular intervals. Open blocked condensate drain holes from time to time.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Additional Safety Instructions for Permanent Magnet Synchronous Machines

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Additional Safety Instructions for Permanent Magnet Synchronous Machines

• nly qualified personnel familiar with the relevant safety

requirements are allowed to open and maintain permanent magnet synchronous machines. it is not allowed to remove the rotor of a permanent magnet synchronous machine without the special tools designed for this purpose when the machine’s shaft is rotating, a permanent magnet synchronous machine induces a voltage in its terminals the induced voltage is proportional to the rotational speed, and can be hazardous even at low speeds prevent any rotation of the shaft before opening the terminal box and or before working at unprotected terminals

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Additional Safety Instructions for Permanent Magnet Synchronous Machines

• nly qualified personnel familiar with the relevant safety

requirements are allowed to open and maintain permanent magnet synchronous machines. it is not allowed to remove the rotor of a permanent magnet synchronous machine without the special tools designed for this purpose when the machine’s shaft is rotating, a permanent magnet synchronous machine induces a voltage in its terminals the induced voltage is proportional to the rotational speed, and can be hazardous even at low speeds prevent any rotation of the shaft before opening the terminal box and or before working at unprotected terminals

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Additional Safety Instructions for Permanent Magnet Synchronous Machines

• nly qualified personnel familiar with the relevant safety

requirements are allowed to open and maintain permanent magnet synchronous machines. it is not allowed to remove the rotor of a permanent magnet synchronous machine without the special tools designed for this purpose when the machine’s shaft is rotating, a permanent magnet synchronous machine induces a voltage in its terminals the induced voltage is proportional to the rotational speed, and can be hazardous even at low speeds prevent any rotation of the shaft before opening the terminal box and or before working at unprotected terminals

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Additional Safety Instructions for Permanent Magnet Synchronous Machines

• nly qualified personnel familiar with the relevant safety

requirements are allowed to open and maintain permanent magnet synchronous machines. it is not allowed to remove the rotor of a permanent magnet synchronous machine without the special tools designed for this purpose when the machine’s shaft is rotating, a permanent magnet synchronous machine induces a voltage in its terminals the induced voltage is proportional to the rotational speed, and can be hazardous even at low speeds prevent any rotation of the shaft before opening the terminal box and or before working at unprotected terminals

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Additional Safety Instructions for Permanent Magnet Synchronous Machines

• nly qualified personnel familiar with the relevant safety

requirements are allowed to open and maintain permanent magnet synchronous machines. it is not allowed to remove the rotor of a permanent magnet synchronous machine without the special tools designed for this purpose when the machine’s shaft is rotating, a permanent magnet synchronous machine induces a voltage in its terminals the induced voltage is proportional to the rotational speed, and can be hazardous even at low speeds prevent any rotation of the shaft before opening the terminal box and or before working at unprotected terminals

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Additional Safety Instructions for Permanent Magnet Synchronous Machines

the terminals of a machine with frequency converter supply may be energized even when the machine is at standstill beware of revers power when working at the supply system do not exceed the maximum allowed speed of the machine see product specific manuals magnitic stray fields, caused by an open or disassembled permanent magnet synchronous machine or by a seperate rotor of such a machine, may disturb or damage other electrical or electromagnetic equipment, such as cardiac pacemakers, creditcards and equivalent

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Additional Safety Instructions for Permanent Magnet Synchronous Machines

the terminals of a machine with frequency converter supply may be energized even when the machine is at standstill beware of revers power when working at the supply system do not exceed the maximum allowed speed of the machine see product specific manuals magnitic stray fields, caused by an open or disassembled permanent magnet synchronous machine or by a seperate rotor of such a machine, may disturb or damage other electrical or electromagnetic equipment, such as cardiac pacemakers, creditcards and equivalent

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Additional Safety Instructions for Permanent Magnet Synchronous Machines

the terminals of a machine with frequency converter supply may be energized even when the machine is at standstill beware of revers power when working at the supply system do not exceed the maximum allowed speed of the machine see product specific manuals magnitic stray fields, caused by an open or disassembled permanent magnet synchronous machine or by a seperate rotor of such a machine, may disturb or damage other electrical or electromagnetic equipment, such as cardiac pacemakers, creditcards and equivalent

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Additional Safety Instructions for Permanent Magnet Synchronous Machines

the terminals of a machine with frequency converter supply may be energized even when the machine is at standstill beware of revers power when working at the supply system do not exceed the maximum allowed speed of the machine see product specific manuals magnitic stray fields, caused by an open or disassembled permanent magnet synchronous machine or by a seperate rotor of such a machine, may disturb or damage other electrical or electromagnetic equipment, such as cardiac pacemakers, creditcards and equivalent

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Additional Safety Instructions for Permanent Magnet Synchronous Machines

the terminals of a machine with frequency converter supply may be energized even when the machine is at standstill beware of revers power when working at the supply system do not exceed the maximum allowed speed of the machine see product specific manuals magnitic stray fields, caused by an open or disassembled permanent magnet synchronous machine or by a seperate rotor of such a machine, may disturb or damage other electrical or electromagnetic equipment, such as cardiac pacemakers, creditcards and equivalent

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Additional Safety Instructions for Permanent Magnet Synchronous Machines

loose metallic parts and wast must be prevented from entering the interior of the permanent magnet synchronous machine as well as getting in contact with the rotor before closing an opened permanent magnet synchronous machine, wast and any parts not belonging to the machine must be removed Beware of magnetic stray fields and possible induced voltages when rotating the separate rotor of a permanent magnet synchronous machine as they may cause damage to surrounding equipment.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Additional Safety Instructions for Permanent Magnet Synchronous Machines

loose metallic parts and wast must be prevented from entering the interior of the permanent magnet synchronous machine as well as getting in contact with the rotor before closing an opened permanent magnet synchronous machine, wast and any parts not belonging to the machine must be removed Beware of magnetic stray fields and possible induced voltages when rotating the separate rotor of a permanent magnet synchronous machine as they may cause damage to surrounding equipment.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Additional Safety Instructions for Permanent Magnet Synchronous Machines

loose metallic parts and wast must be prevented from entering the interior of the permanent magnet synchronous machine as well as getting in contact with the rotor before closing an opened permanent magnet synchronous machine, wast and any parts not belonging to the machine must be removed Beware of magnetic stray fields and possible induced voltages when rotating the separate rotor of a permanent magnet synchronous machine as they may cause damage to surrounding equipment.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Rules During any Operation

Disconnect and lock out before working on the machine or the driven equipment. Ensure no explosive athmosphere is present while the work is in progress.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Rules During any Operation

Starting and Restarting

Figure : The maximum number of sequential starts...

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Rules During any Operation

Starting and Restarting The maximum number of sequential starts has been declared in machine’s technical documents.(ex. autotransformator starting) the new starting sequence is allowed after the machine has cooled down to ambient temperature for a cold start condition or to operating temperature for a warm start condition.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Rules During any Operation

Starting and Restarting The maximum number of sequential starts has been declared in machine’s technical documents.(ex. autotransformator starting) the new starting sequence is allowed after the machine has cooled down to ambient temperature for a cold start condition or to operating temperature for a warm start condition.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Rules During any Operation

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Rules During any Operation

Earthing and Equipotential Bonding Check before starting that all earthing and equipotential bonding cables are effectivly connected. Do not remove any earthing or equipontialing cables, which have been assembled by the manufacturer.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Rules During any Operation

Earthing and Equipotential Bonding Check before starting that all earthing and equipotential bonding cables are effectivly connected. Do not remove any earthing or equipontialing cables, which have been assembled by the manufacturer.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Rules During any Operation

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Rules During any Operation

Clearances, creepage and separations Do not make any removal or adjustment in terminal boxes, wich could decrease clearances or creepage distances between parts. Do not install any new equipment to terminal boxes without asking for advise from the manufacturer of the original equipment. Be sure that the air gap between rotor and stator is measured after any maintenance on the rotor or bearings. The air gap shall be the same in any point between the rotor and the stator. Centralize the fan to the centre of the fan hood or the air guide after any maintenance. The clearance shall be at least 1 percent of the maximum diameter of te fan and in accordance with standards.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Rules During any Operation

Clearances, creepage and separations Do not make any removal or adjustment in terminal boxes, wich could decrease clearances or creepage distances between parts. Do not install any new equipment to terminal boxes without asking for advise from the manufacturer of the original equipment. Be sure that the air gap between rotor and stator is measured after any maintenance on the rotor or bearings. The air gap shall be the same in any point between the rotor and the stator. Centralize the fan to the centre of the fan hood or the air guide after any maintenance. The clearance shall be at least 1 percent of the maximum diameter of te fan and in accordance with standards.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Rules During any Operation

Clearances, creepage and separations Do not make any removal or adjustment in terminal boxes, wich could decrease clearances or creepage distances between parts. Do not install any new equipment to terminal boxes without asking for advise from the manufacturer of the original equipment. Be sure that the air gap between rotor and stator is measured after any maintenance on the rotor or bearings. The air gap shall be the same in any point between the rotor and the stator. Centralize the fan to the centre of the fan hood or the air guide after any maintenance. The clearance shall be at least 1 percent of the maximum diameter of te fan and in accordance with standards.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Rules During any Operation

Clearances, creepage and separations Do not make any removal or adjustment in terminal boxes, wich could decrease clearances or creepage distances between parts. Do not install any new equipment to terminal boxes without asking for advise from the manufacturer of the original equipment. Be sure that the air gap between rotor and stator is measured after any maintenance on the rotor or bearings. The air gap shall be the same in any point between the rotor and the stator. Centralize the fan to the centre of the fan hood or the air guide after any maintenance. The clearance shall be at least 1 percent of the maximum diameter of te fan and in accordance with standards.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Rules During any Operation

Connections in terminal boxes (Ex motors) All connections in main terminal boxes must be made with Ex-approved connectors, wich are delivered with the machine by the manufacturer. All connections, in auxiliary terminal boxes, as marked intrinsically safe circuits (Ex i or EEx i) must be connected to proper safety barriers.

Willem Maes High Voltage Safety

General Safety Instructions for High Voltage Machines General Safety Instructions - Machines

Rules During any Operation

Connections in terminal boxes (Ex motors) All connections in main terminal boxes must be made with Ex-approved connectors, wich are delivered with the machine by the manufacturer. All connections, in auxiliary terminal boxes, as marked intrinsically safe circuits (Ex i or EEx i) must be connected to proper safety barriers.

Willem Maes High Voltage Safety

Appendix For Further Reading

For Further Reading I

The Rules Lloyds register of shipping. The Rules ABS.

Willem Maes High Voltage Safety