For safety testing of wall sockets and residual-current circuit breakers. With three LED lamps, which show if the installation is made correctly.

Three different tests can be performed:

Test 1

Detects if voltage is detected on earth.

Test 2

Detects on earthed sockets:

• Correct connection, phase to the left
• Correct connection, phase to the right
• if earth is missing
• if neutral is missing
• if phase is missing
• if phase and earth are interchanged
• if phase and earth are interchanged and earth is missing
• Detects on unearthed sockets: if phase and neutral are missing.

Test 3

RCCB-test that checks if a 30mA RCCB trips as it should.

Over-voltage protector: 300V AC/DC