Fluke 1650B [35/62] Warning

Electrical Installation Tester

Making Measurements

Measuring RCD Tripping Current

(Models 1652B and 1653B Only)

apx009f.eps

Figure 16. RCD Tripping Current/Switch and Terminal Settings

This test measures the RCD tripping current by applying a test current and then

gradually increasing the current until the RCD trips. You can use the test leads

or mains cord for this test. A 3-wire connection is required.

XW Warning

• Test the connection between the N-conductor and earth

before starting the test. A voltage between the N-conductor

and earth may influence the test.

• Leakage currents in the circuit following the residual current

protection device may influence measurements.

• The displayed fault voltage relates to the rated residual

current of the RCD.

• Potential fields of other earthing installations may influence

the measurement.

Note

If the L and N terminals are reversed, the tester will auto-swap them

internally and continue testing. If the tester is configured for UK

operation, testing will halt

and you will need to determine why the L

and N are swapped

. This condition is indicated by arrows above or

below the terminal indicator symbol (b).Type A RCDs do not have

the 1000mA option available.

To measure RCD tripping current:

1. Turn the rotary switch to the I

ΔN

position.

2. Press 1 to select the RCD current rating (10, 30, 100, 300, or 500 mA).