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• Keep pressing the ENTER key to operate the output relays forcibly.
• Check that the output contacts operate at the terminal.
• Stop pressing the ENTER key to reset the operation
6.4.4 AC Input Circuits
This test can be performed by applying the checking currents to the AC input circuits and verifying
that the values applied coincide with the values displayed on the LCD screen.
The testing circuit is shown in Figure 6.4.2. A single-phase current source is required.
Single-phase
current
source
power
supply
To check the metering data on the "Metering" screen, do the followings.
"Status" sub-menu → "Metering" screen
If the setting is 0(= Primary), change the setting to 1(=Secondary) in the "Set. (change)"
sub-menu.
"Set. (change)" sub-menu → "Status" screen → "Metering" screen
Remember to reset it to the initial setting after the test is finished.
• Open the "Metering" screen in the "Status" sub-menu.
"Status" sub-menu → "Metering" screen
• Apply AC currents and check that the displayed values are within ±5% of the input values.
6.5 Function Test
6.5.1 Measuring Element
Measuring element characteristics are realised by software, so it is possible to verify the overall
characteristics by checking representative points.
Operation of the element under test is observed by assigning the signal number to a configurable
LED or a binary output relay.
A
+
−
Figure 6.4.2 Testing AC Input Circuit
162
TB 1 -1
-2
-3
-4
-5
-6
-7
-8
TB 1
- 13
- 14
-12
Note: AC input terminal numbers depends on model.
6 F 2 T 0 1 7 2
GRE110
I a
I b
I c
I
N
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