Work On or Near Electrical Apparatus

OPERATING Philosophy

We know you value your people and your network.

Safety of

People

protection of

plant

continuity of

supply

The following exists to assist a Network Operator achieve this Philosophy:

LEGISLATIVE REQUIREMENTS

Describes the minimum requirements for work performed on or near to electrical apparatus. Compliance is required!

INDUSTRY STANDARDS

Describes typical activities most Network Operators perform.

WORKPLACE PROCEDURES

Provided by Network Operators to describe the specific requirements for work activities on their Network.

AUSTRALIAN STANDARDS

AS/NZ Standards are developed to provide industries with the minimum requirements for the outcomes of performed work.

NOTE – *Australian Standards are required to be complied with when called up in legislation.

A good example of this includes AS/NZS 3000:2018 – Electrical installations (known as the Australian/New Zealand Wiring Rules).

SAFE APPROACH DISTANCES

Staying away from electrical apparatus is the third most effective way to achieve the Network Operating Philosophy

When working NEAR to electrical parts, prescribed distances exist that a person, vehicle, and mobile plant are required to be observed.

Depending on the State or Territory in Australia, these prescribed distances are referred to as:

Exclusion Zones

Safe Approach Distances (SADs)

Minimum Approach Distances (MADs)

Approach Limits

These prescribed distances are different depending on the Network Operator’s determination of a person’s technical knowledge & experience.

  1. AUTHORISED PERSON
    This means the Network Operator has determined that the person has enough Technical Knowledge and Experience.
  2. INSTRUCTED PERSON
    This means the person is constantly supervised by an Authorised Person.
  3. UNTRAINED PERSON
    This means a person who is not an Authorised Person.

These distances can be Legislatively enforced i.e. it’s the Law.

Applying Portable Earthing Device to 275kV Open Bus

HIERARCHY OF CONTROLS

1. Elimination
2. Substitution
3. ISOLATION
4. Engineering
5. Administration
6. PPE

get authorised

UTC can deliver Training and Assessment Course material that provides the needed Technical Knowledge typically required by a Network Operator to authorise a person.

WORK INSIDE EXCLUSION ZONES

Network Operators need workers to come inside Exclusion Zones to perform necessary maintenance and repairs.

1. LIVE LINE PROCEDURES

Legislative & industry procedures exist that allow work on High Voltage apparatus whilst it remains energised.

This is a highly specialised field of work within the electrical industry.

UTC has observed these procedures are usually only used by networks operating considerable & complex Transmission & Distribution Networks i.e. State Government owned Electricity Entities, Electrical Supply Authorities, Power Industry Suppliers etc.

UTC agrees with the majority of privately owned High Voltage Network Operators who choose to not use these procedures.

2. HVIA PROCEDURES

The most common and effective method of performing work on High Voltage electrical apparatus is by implementing what is commonly known as ‘HVIA’ Procedures.

See HVIA Procedures Page for more information.

Transformer Nameplate Inspection

HIERARCHY OF CONTROLS

1. ELIMINATION
2. Substitution
3. Isolation
4. Engineering
5. Administration
6. PPE