Basler BE1-CDS220, Instruction Manual

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13-8 Testing And Maintenance BE1-CDS220
Step 4. Transmit the command M2-I to the relay, or navigate to the front panel HMI screen
\METER\CRNT\CT_2\I_MEAS (3.1.2.1) and \METER\CRNT\CT_2\I_CALC (3.1.2.2) and verify
the values listed in Table 13-5.
Table 13-5. Circuit 2 Metering Quantities
CT secondary I
A2,
I
B2,
And I
C2
I
N2
I
Q2
5 A 5.0 A (
±
1%) @ 180
o
15.0 A (
±
1%) @ 180
°
0.0 A (
±
1%)
1 A 1.0 A (
±
1%) @ 180
o
3.0 A (
±
1%) @ 180
°
0.0 A (
±
1%)
Step 5. If the unit has an independent ground input, transmit the command M-IG to the relay, or
navigate to the screen \METER\CRNT\GND\I_MEAS (3.1.3.1) on the optional front panel HMI
and verify that I
G
=5.0 A (
±
1%) @ 0
o
(for a 5 A secondary rated CT inputs), or 1.0 A (
±
1%) @
0
o
(for a 1 A secondary rated CT inputs).
Step 6. Remove current from the relay.
COMMISSIONING TESTING
Because the commissioning of this relay may be a new installation or a retrofit, special precautions should
be taken to ensure that all tests are performed with safety as the utmost concern. Any CT circuit signals
that are routed through this device as part of a protection scheme including discrete relays or as a stand-
alone device, should be shorted and isolated from this relay during these tests until the final instrument
transformer current circuit check.
If this relay is being installed in an existing installation, please be aware of the equipment monitoring
features of this device, especially if the monitoring logic will be utilized. Make note of any pretest operation
levels, duty levels, etc. on existing equipment (e.g. – breakers or transformers). As the user, you may set
the initial values into the relay to duplicate monitored values in the existing equipment.
Because of the multifunction capabilities of the BE1-CDS relay, it may be necessary to temporarily disable
some of the protective elements while testing others or to change setting logic to test a specific function.
Always remember to enable these functions and install operation settings before placing the relay in
service. To guard against placing the relay in service with unwanted operational or logic settings, it is a
good practice to save a copy of the original setting file before the testing process begins. When testing is
complete, the saved copy could then be loaded into the relay which would guarantee that no setting
changes or testing modifications would remain in the relay.
To assist you in the commissioning testing of this relay, refer to the previous paragraphs in this Section on
Testing and Troubleshooting Aids, and Section 6, Reporting and Alarm Functions for various ways to
retrieve or interpret reporting status, alarms, and targets.
Refer to the other Sections of the instruction manual for assistance on any particular functions of the relay.
If you require further assistance, contact Basler Electric field application personnel or the factory.
Protection and Control Function Verification
Before placing the relay in service, it should be verified that the desired protection and control functions
are enabled and connected to the correct CT input circuits that the programmable logic settings provide
the proper interconnection of these functions, and that each has the desired set points. This can be
accomplished by a detailed review of the settings as read out of the relay before placing it in service. Or, it
may be desirable to verify the settings by test.
Important
Because this is a numerical relay whose characteristics are defined by software, it is not
necessary to verify that each phase element of a protective function responds. By testing
a single phase of each function and varying the phase input tested for each function, it is
possible to verify the entire relay. For example, to verify the phase overcurrent elements,
one could test phase A for the 51P element, and phase B for the 50TP element, etc.