The UNI-T UT528AU Portable Appliance Tester (PAT) is a compact, battery-powered electrical safety tester designed for routine testing of Class I appliances, Class II appliances, extension leads and IEC leads.
Configured for Australian and New Zealand applications, the UT528AU combines simple 3-button operation with automatic test sequences and clear PASS/FAIL indication, making appliance safety testing faster and easier for electricians, maintenance technicians, service companies, workshops, facilities teams and organisations responsible for portable electrical equipment.
The UT528AU performs essential appliance safety measurements including earth continuity, insulation resistance, leakage testing and cord wiring checks, while its low current 200 mA earth bond test makes it suitable for testing sensitive IT and electronic equipment.
- Australian / New Zealand configuration
- Tests Class I appliances
- Tests Class II appliances
- Tests extension leads and IEC leads
- Simple 3-button operation
- Automatic appliance test sequences
- Clear PASS / FAIL indication
- 250 V / 500 V insulation resistance testing
- Low-current 200 mA earth continuity test
- Suitable for sensitive IT and electronic equipment
- Leakage current testing
- Extension lead wiring test
- Detects open circuit, short circuit and reversed wiring conditions
- Zero Earth Lead / Lead Nulling function
- Dedicated setting for extension leads over 30 m
- Built-in AU/NZ mains socket connection
- Large LCD display
- Battery powered for portable field operation
- Auto power-off
- Low-battery indication
- Supplied in a hard plastic carrying case
Simple Automatic PAT Testing
The UT528AU is designed to simplify routine portable appliance testing.
Select the appropriate test according to the appliance type:
Class I | Class II | Extension Lead
The tester automatically performs the required test sequence and displays the measurement results together with an easy-to-understand PASS or FAIL result.
This makes the UT528AU particularly suitable for users who need a practical PAT tester without unnecessary complexity.
Class I Appliance Testing
For Class I appliances, the UT528AU can perform earth continuity and insulation-related safety checks.
The earth continuity measurement uses a minimum 200 mA test current with a nominal 5 V test voltage.
Typical Class I appliances can include:
- Power tools
- Kitchen appliances
- Office equipment
- Workshop equipment
- Electrical machinery
- Metal-bodied appliances
- Commercial equipment
The low test current helps make the UT528AU suitable for modern appliances containing sensitive electronic components.
Class II Appliance Testing
The UT528AU also provides a dedicated test sequence for Class II / double-insulated appliances.
Typical Class II equipment can include:
- Power supplies
- Chargers
- Small appliances
- Electronic equipment
- Double-insulated power tools
- Office equipment
The dedicated Class II button allows the appropriate test sequence to be started quickly without navigating complicated menus.
