UEERE0051 — Apply electrical principles to renewable energy design

Elements & performance criteria

Performance evidence

• applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures and practices
• applying safety principles for electrical systems in buildings and premises
• reviewing renewable energy system designs for compliance with industry standards, guidelines and codes
• interpreting drawings and diagrams to determine the apparatus, cables and isolation device sizes and types
• identifying, interpreting, and applying relevant renewable energy system regulations / legislation, industry standards, and codes
• calculating: cable sizes, isolator sizes, protection device sizes, system energy production/yield
• drawing block diagrams incorporating apparatus, cables, isolators and overcurrent protection
• identifying any additional expertise or approval required for execution of design
• verifying equipment and cable selected complies with standards and job specifications
• completing necessary documentation and record keeping

Knowledge evidence

• safety and compliance including: hierarchy of Acts, Regulation, Standards and Codes Licensing restrictions electrical isolation requirements and processes
• electrical theory including: definitions of and units of measurement for: voltage current resistance including conductors versus insulators power energy Ohm’s law, including: relationship between Voltage, Current and Resistance basic direct current (d.c.) single path circuit voltage and current levels in a basic d.c. single path circuit effects of an open circuit, a closed circuit and a short circuit on a basic d.c. single path relationship between voltage and current from measured values in a simple circuit difference between power and energy, and when is each used simple calculations including: appliance loads energy ratings
• the grid including: high voltage (HV) and low voltage (LV) distribution network service provider (DNSP) electricity bills, tariff structures and demand charges single, two and three phase main switchboard and distribution boards fault currents
• drawings including: drawing types including: single line diagram (SLD) wiring architectural block interpreting site plans interpreting drawing symbols used for renewable energy designs/installations
• basic electrical circuits including: elements of a simple electric circuit (supply, control switch, protection device and load) purpose of each component in the circuit effects of an open circuit, a closed circuit and a short circuit types of loads including: resistive inductive alternating current (AC - both single and three phase) and direct current (DC), what each is, and dangers posed by each need for devices to afford electrical protection and the mechanisms used in protection devices including resetting symbols used to represent an electrical energy source, a load, a switch and a circuit protection device in a circuit diagram
• electrical power, including: power ratings of devices power dissipated in circuit from voltage, current and resistance values definition of ‘power’ in electrical terms (for d.c. or resistive a.c. circuits) using circuit readings determine power using the appropriate equations, symbols and unit abbreviations including the use of multiples and sub multiples
• series circuits, including: circuit diagram of a single source d.c. series circuit identification of the major components of a series circuit: power supply, loads, connecting leads and switch relationship between voltage drops and resistance in a simple voltage divider network effect of an open circuit on a series connected circuit
• parallel circuits including: schematic diagram of a single source d.c. parallel circuit identification of the major components of a parallel circuit (power supply, protection device, switch and loads) applications where parallel circuits are used in the electrotechnology industry characteristics of a parallel circuit (load connection, current paths, voltage drops, power dissipation, and effects of an open circuit in a parallel circuit) relationship between currents entering a junction and currents leaving a junction relationship between branch currents and resistances in a two-branch current divider network
• series/parallel circuits including: schematic diagram of a single source d.c. series/parallel circuit identification of the major components of a series/parallel circuit (power supply, protection device, switch and loads) applications where series/parallel circuits are used in the electrotechnology industry characteristics of a series/parallel circuit (load connection, current paths, voltage drops, power dissipation, and effects of an open circuit in a series/parallel circuit) relationship between voltages, currents and resistances in a bridge network calculation of the total: resistance of a series/parallel circuit current of a series/parallel circuit voltage and the individual voltage drops of a series/parallel circuit techniques for setting up and connecting a single source d.c. series/parallel circuit
• factors effecting resistance, including: effect the change in the type of material (resistivity) has on the resistance of a conductor effect the change in ‘length’ has on the resistance of a conductor effect the change in ‘cross-sectional area’ has on the resistance of a conductor effects of temperature change on the resistance of various conducting materials effects of resistance on the current-carrying capacity and voltage drop in cables techniques for calculation of the resistance of a conductor from factors such as conductor length, cross-sectional area, resistivity and changes in temperature
• power factor
• basic measuring equipment including: multi meter AC/DC clamp meter megohmmeter
• earthing systems including: functional earthing protective earthing and equipotential bonding typical earthing arrangements for electrical installations, including installations with outbuildings multiple earthed neutral (MEN) system including: protective earth-neutral (PEN) conductor main earthing conductor MEN link earth electrode
• switchboards and protection including: switchboard types, application and construction arrangement and identification of switchboard equipment devices for functions of isolation, emergency, mechanical maintenance and functional control circuit breakers including: miniature circuit breaker (MCB) molded case circuit breaker (MCCB) residual current device (RCD) residual current breaker with overcurrent (RCBO) fuses coordination of overload and short circuit protection devices device requirements for protection against over-voltage and under-voltage signage alternate supplies ingress protection (IP) ratings relevant industry standard requirements for switchboards and protection
• cabling including: purpose, types and construction of cables used in renewable energy installations current carrying capacity of cables cable installation methods including: in air open on surface partially surrounded fully surrounded typical cable routes through buildings, structures and premises mechanical cable protection methods cable and conductor terminations maintaining fire integrity rating voltage drop voltage rise earth fault-loop impedance short circuit performance consideration methods to calculate/select cable sizes including: AC and DC cables earthing cables relevant industry standard requirements for cables
• techniques for the calculation of energy production/yield
• relevant safe work method statements (SWMS)/job safety assessments or risk mitigation processes

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