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1MRK 505 351-UEN Section 2

Commissioning

Commissioning Manual 9

Distributed busbar protection REB500

2.2.4 Checking the analog inputs (CTs)

Using a test set, inject a secondary current into each of the CT inputs.

The CT connections can be checked in one of the following ways:

· Reading the injected currents on the local HMI

(Note: The readings are referred to the primary values.)

· Reading the injected currents via HMI500 by selecting “Analog input

measurements” in the “View” menu

· Reading the injected currents via HMI500 by selecting “Protection zone

measurements” in the “View” menu

· Reading the injected currents via HMI500 by selecting “Single-line

diagram”

· Increasing the currents until a protection function picks up.

2.2.5 Checking the analog inputs (VTs)

Using a test set, inject a secondary voltage into each of the voltage transformer

inputs.

The checks can be executed in different ways:

· Reading the injected currents on the local HMI

· Reading the injected currents via HMI500 by selecting “Analog input

measurements” in the “View” menu.

Primary values of phase-to-neutral voltages are displayed.

2.2.6 Checking the binary input signals (optocoupler inputs)

Check the proper function of every binary optocoupler input by exciting the signal

source.

The binary inputs can be checked in one of the following ways:

· Reading the status on the local HMI

ABB REB500 Commissioning Manual

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