ABB LXN1604-6 3BHL000986P7000 DIN rail type power supply brand new off the shelf

Description

LXN1604-6 The simple test setup shown below can be used for the majority of tests. When the diode is

not shorted and the two currents are summed together prior to the switch, the composite

current contains the 2nd harmonic necessary LXN1604-6 to verify the 2nd harmonic restraint of the

harmonic restraint percent differential elements. With the diode shorted and the two

currents fed to separate relay inputs, the slope of the differential elements can be

measured. With only I 1 connected (with a return path) the pickup level of any element can

be measured.

 Review appropriate sections of this manual to familiarize yourself with

the relay. Confidence in the commissioning LXN1604-6 process comes with

knowledge of the relay features and methods of applying settings.

 Verify the installation to ensure correct connections of all inputs and

outputs.

 Review the relay settings and/or determine features and settings

required for your installation. In large utilities a central group is often

responsible for determining which relay LXN1604-6 features will be enabled and

which settings are appropriate. In a small utility or industrial user, the

on-site technical person is responsible both for the settings and also for

the complete testing of the relay.

 Set the relay according to requirements.

Ensure that the correct relay model has been installed. A summary table

is available in this manual for users to record all the relay settings.

 When the testing is completed, verify the applied relay settings, and

verify that all desired elements LXN1604-6 have been enabled, using the EnerVista

745 Setup software or the relay front panel.

 Verify that the relay rated AC current matches the CT secondary value.

 Verify that the relay rated AC voltage matches the VT secondary value.

 Verify that the relay rated frequency setting matches the power system

frequency.

 Open all blocking switches so as not to issue an inadvertent trip signal to

line breakers.

 Verify that the auxiliary supply matches relay nameplate. Turn the

auxiliary supply on.

 Verify that all grounding connections are correctly made.

To facilitate testing it is recommended that all functions be initially set to Disabled. Every

feature which will be used in the application should be set per desired settings, enabled for

the specific commissioning test LXN1604-6 for the feature, then returned to Disabled at completion of

its test. Each feature can then be tested without complications caused by operations of

other features. At the completion of all commissioning tests all required features are then

Enabled.

It is necessary to keep track of modifications/changes made to settings during the

course of these commissioning steps and ensure that all settings are returned to the

‘in-service’ values at the end of the tests, prior to placing the relay into service.

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