5. Check the operation with the continuity tester.
6.
Measure the resistance of the contacts in the closed state.
7. Reset the output relay by setting the Contact Test cell to Remove Test.
8. Repeat the test for the remaining output relays.
9. Return the IED to service by setting the Test Mode cell in the COMMISSION TESTS menu to Disabled.
5.2.10 RTD INPUTS
This test checks that all the RTD inputs are functioning correctly, if the RTD board is fitted.
Please r
efer to the wiring diagrams for details of the terminal connections.
1. You should connect a 100 ohm resistor across each RTD in turn. The resistor needs to have a very small
tolerance (0.1%). You must connect the RTD common return terminal to the correct RTD input, otherwise the
device will report an RTD error.
2. Check that the corresponding temperature displayed in the MEASUREMENTS 3 column of the menu is 0°C
+/-2°C. This range takes into account the 0.1% resistor tolerance and device accuracy of +/-1°C. If a resistor
of lower accuracy is used during testing, the acceptable setting range needs to be increased.
5.2.11 CURRENT LOOP OUTPUTS
This test checks that all the current loop outputs are functioning correctly, if the board is fitted.
Please r
efer to the wiring diagrams for details of the terminal connections. Note that for the current loop outputs,
the physical connection of the 1 mA output is different from that of the other types.
1. Enable the current loop output to be tested.
2. Note the current loop output type (CLO Type) for the application.
3. Note the current loop output parameter (CLO Parameter)
4. Note the current loop output minimum and maximum settings (CLO Minimum and CLO Maximum)
5. Apply the appropriate analog input quantity to match the CLO Parameter at a value equal to (CLO
maximum + CLO minimum)/2. The current loop output should be at 50% of its maximum rated output.
6. Using a precision resistive current shunt and a high-resolution voltmeter, check that the current loop output
is at 50% of its maximum rated output according to the range as follows:
0.5 mA (0 to 1 mA CLO)
5 mA (0 to 10 mA CLO)
10 mA (0 to 20, 4 to 20 mA CLO)
7. The accuracy should be within +/-0.5% of full scale + meter accuracy.
5.2.12 CURRENT LOOP INPUTS
This test checks that all the current loop inputs are functioning correctly, if the board is fitted.
Please r
efer to the wiring diagrams for details of the terminal connections. Note that for the current loop inputs,
the physical connection of the 1 mA input is different from that of the other types.
You can use an accurate DC current source to apply various current levels to the current loop inputs. One
approach to this is to use a current loop output as a DC current sources. If you stimulate the current loop output by
P64x Chapter 19 - Commissioning Instructions
P64x-TM-EN-1.3 421
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