8-6
745 Transformer Management Relay
GE Multilin
8.3 LOGIC INPUTS AND OUTPUT RELAYS
8 COMMISSIONING
8
8.3LOGIC INPUTS AND OUTPUT RELAYS
8.3.1 LOGIC INPUTS
Figure 8–3: LOGIC INPUTS
1.
Prior to energizing any of the Logic Inputs, ensure that doing so will not cause a relay trip signal to be issued beyond
the blocking switches. These should have been opened prior to starting on these tests. If you wish, you can disable the
Logic Input functions by setting:
S3 LOGIC INPUTS
ÖØ
LOGIC INPUT 1 (16)
ÖØ
LOGIC INPUT 1(16) FUNCTION:
"Disabled"
2.
Connect a switch between Logic Input 1 (Terminal D1) and +32 V DC (Terminal D12), as shown above (alternatively,
use the wet contact approach shown in the same figure). Logic Inputs can be asserted with either an opened or closed
contact, per the user choice. Verify/set the type of Logic Input to be used with the following setpoint:
S3 LOGIC INPUTS
ÖØ
LOGIC INPUTS
ÖØ
LOGIC INPUT 1 (16) / INPUT 1(16) ASSERTED STATE
3.
Display the status of the Logic Input using the
A1 STATUS
ÖØ
LOGIC INPUTS
ÖØ
LOGIC INPUT 1(16) STATE
actual value.
4.
With the switch contact open (or closed), check that the input state is detected and displayed as "Not Asserted".
5.
Close (open) the switch contacts. Check that the input state is detected and displayed as "Asserted".
6.
Repeat for all the relay logic inputs which are used in your application.
8.3.2 OUTPUT RELAYS
1.
To verify the proper functioning of the output relays, enable the Force Output Relays function by setting:
S6 TESTING
Ö
OUTPUT RELAYS
Ö
FORCE OUTPUT RELAYS FUNCTION
: "Enabled"
The Test Mode LED on the front of the relay will come ON, indicating that the relay is in test mode and no longer in ser-
vice. In test mode all output relays can be controlled manually.
2.
Under
S6 TESTING
ÖØ
OUTPUT RELAYS
set the
FORCE OUTPUT 1
to
FORCE OUTPUT 8
setpoints to "De-energized".
3.
Using a multimeter, check that all outputs are de-energized. For outputs 2 to 5, the outputs are dry N.O. contacts and
for Outputs 6 to 8, the outputs are throw-over contacts (form C). Output 1 is a solid state output. When de-energized,
the resistance across E1 and F1 will be greater than 2 MW; when energized, and with the multimeter positive lead on
E1, the resistance will be in the 20 to 30 kW.
4.
Now change the
FORCE OUTPUT 1
to
FORCE OUTPUT 8
setpoints to "Energized".
5.
Using a multimeter, check that all outputs are now energized.
6.
Now return all output forcing to "De-energized" and disable the relay forcing function by setting
S6 TESTING
Ö
OUTPUT
RELAYS
Ö
FORCE OUTPUT RELAYS FUNCTION
to "Disabled"
7.
All the output relays should reset.
