Preparation – KYORITSU 5410 User Manual

Page 13

7. Preparation

7-1 Connection of Test Leads

Connect the test lead properly.

●

Connect the test lead M7128; red cord to the load of the Connector

block and black cord to the power supply.

●

When using the test lead with Alligator clip, connect the test lead

M7128 (red) to the load of Connector block and M7129 to the power.

7-2 Setting of Measurement Range

Turn the Function Switch and power on the instrument, then select any
appropriate Ranges.

Range construction: There are 4 Ranges on this instrument.

x 5

For trip time measurement :
Apply a current 5 times bigger than IΔn to measure
RCD trip time.

x 1

For trip time measurement :
Apply IΔn to measure RCD trip time.

x 1/2

For the test - rated residual non-operating current :
Apply a half of IΔn to confirm the RCD under test
doesn’t trip.

AUTO RAMP For trip out current measurement :

Vary a testing current in the range of 40% ~ 110% of
IΔn to measure the trip out current on the RCD.

WARNING

Do not power on the instrument with it being connected to the live
circuit.