GE Industrial Solutions MX350 Instruction manual - Manual (Page 99)

CHAPTER 6: EXERCISER INFORMATION
MX350 AUTOMATIC TRANSFER CONTROL SYSTEM – INSTRUCTION MANUAL 6–3
Figure 3: System test choices
There are three types of tests: Fast Test, Xfer Load, and No Xfer. The screen also provides
an ‘End’ button to abort any of the three test types.
To test the functionality of the switch the operator can use the Fast Test option. With this
kind of test, the engine generator will start and the load will transfer without going through
any time delays.
In order to simulate a load transfer as if an outage was occurring, the operator can select
the Xfer Load test. With this test type, the engine will start up and the load will transfer
according the time delay of the W timer. When the test is ended by depressing the END
button, the switch will go through the U timer delay before actually transferring back to the
utility.
NOTE
NOTE:
Once a Fast Test, or a Xfer Load command has been issued and the alternative source has
reached an acceptable level of voltage and frequency, the test cannot be aborted. If the
user tries to end the test at this point, the load will still be transferred to the alternative
source, but the return sequence will immediately activated.
For testing the functionality of the engine generator set only, the operator can initiate a
NoXfer test. In this case will engine will start up, but the load will not be transferred.