CHAPTER 5: SETPOINTS S6 TESTING
745 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL 5–107
5.8 S6 Testing
5.8.1 Description
The 745 provides various diagnostic tools to verify the relay functionality. The normal
function of all output contacts can be overridden and forced to be energized or de-
energized. Analog outputs may be forced to any level of their output range. The simulation
feature allows system parameters (magnitudes and angles) to be entered as setpoints and
made to generate fault conditions without the necessity of any system connections. In
addition, 32 cycles of sampled current/voltage waveform data (in IEEE COMTRADE file
format) can be loaded and “played back” to test the response of the 745 under any
(previously recorded) system disturbance.
5.8.2 Output Relays
PATH: SETPOINTS S6 TESTING OUTPUT RELAYS
The 745 has the ability to override the normal function of all outputs, forcing each to
energize and de-energize for testing. Enabling this feature turns the In Service LED off and
the Test Mode LED on. Refer to FIGURE 5–49: Output relays scheme logic on page 5–104 for
the output relay scheme logic.
• FORCE OUTPUT RELAYS FUNCTION: Select “Enabled” to enable the output relay
testing feature and override normal output relay operation. This setpoint is defaulted
to “Disabled” at power on.
• FORCE OUTPUT 1 to 8: Select “Energized” to force output 1(8) to the energized state or
“De-energized” to force output 1(8) to the de-energized state. This setpoint is only
operational when output relay testing is enabled.
• FORCE SELF-TEST RLY: Select “Energized” to force the self-test relay to the energized
state and “De-energized” to force to the de-energized state. This setpoint is only
operational while the output relay testing feature is enabled.
OUTPUT RELAYS [] FORCE OUTPUT RELAYS
FUNCTION: Disabled
Range: Enabled, Disabled
MESSAGE
FORCE OUTPUT 1:
De-Energized
Range: De-energized, Energized
↓
MESSAGE
FORCE OUTPUT 8:
De-energized
Range: De-energized, Energized
MESSAGE
FORCE SELF-TEST RLY:
De-energized
Range: De-energized, Energized
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