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HDT — Refer to MP-6345, Operation/Installation, for more

For the HDT.

Procedure

  1. 2.2 Controls The controller’s user interface panel is accessible through an opening in the transfer switch cover (the inner panel on NEMA type 3R enclosures). Figure 2-1 explains the operation of the controller pushbuttons and LED indicators. The LEDs light steadily or flash to indicate different ATS conditions as shown in Figure 4-7. See Section 4.3 for more information on fault conditions. Press and hold 3 seconds to set the exerciser to run the generator set. Generator source LED flashes. Press and hold for 6 seconds to set the exerciser to start the generator set and transfer the load. Generator source and position LEDs flash. The exerciser will run at the same day and time each week. Press again and hold for 2 seconds to end the exercise. tp6345 Exercise Button Press and hold for 3 seconds to start the generator set. Generator source LED flashes. Press and hold for 6 seconds to start the generator set and transfer the load. Generator source and position LEDs flash. Press again and hold for 2 seconds to end the test. Test Button Utility Source Position LED Green LED lights when the electrical load is connected to the Normal source (typically utility power). Flashes to indicate faults; see Figure 4-7. Utility Source Available LED Green LED lights when the the ATS detects acceptable voltage from the utility power source. Also see Figure 4-7. Generator Position LED Red LED lights when the electrical load is connected to the generator set. Flashes to indicate faults; see Figure 4-7. Generator Source Available LED Red LED lights when the the ATS detects acceptable voltage from the generator set. Flashes to indicate faults; see Figure 4-7. Figure 2-1 User Interface Panel MP-6346 12/05 16 Section 2 Operation
  2. 2.3 Test Sequence Use the test procedure below to run the transfer switch test sequence. Loaded or unloaded test sequences can be run. The test sequence starts the generator set, and, for a loaded test, transfers the load to the emergency source. When the test ends, the transfer switch transfers the load back to the normal source and removes the engine start signal. Note: The Test sequence bypasses the engine start and retransfer to Normal time delays. For instructions to simulate a loss of the Normal source and execute all applicable time delays, see Section 5.4. Transfer switches equipped with the optional accessory board may use different time delays than the factory settings shown in the test procedure. See Figure 2-2 and Figure 2-3. Refer to Section 2.5 for a description of the transfer switch sequence of operation. Note: If the generator set fails during a test, the ATS will immediately attempt to transfer to the normal (utility) source. Note: Install the front panel(s) or close and lock the enclosure door before starting the test procedure. Hazardous voltage. Will cause severe injury or death. Only authorized personnel should open the enclosure. DANGER Procedure to Run the Test Sequence
  3. 1. Check the controller LED indicators to verify that the Utility Source Available and Utility Source Position indicators are lit. See Figure 2-1.
  4. 2. Verify that the generator set master switch is in the AUTO position.
  5. 3. Run a loaded or an unloaded test as described below: a. Loaded Test: Press and hold the TEST button on the controller for 6 seconds to start a loaded test. The GEN Source and Position LEDs flash to indicate that the ATS controller is set up to transfer the load during the test. b. Unloaded Test: To start the generator set without transferring the load, hold the TEST button for 3 to 5 seconds. The GEN Position LED flashes to indicate an unloaded test. Time Delays Factory Accessory Board* Time Delay Factory Setting Range Increment Engine Start 3 sec. 1--10 sec. 1 sec. Transfer from Normal to Emergency 3 sec. 1--10 sec. 1 sec. Retransfer from Emergency to Normal 6 min. 3--30 min. 3 min. Engine Cooldown 5 min. 1--10 min. 1 min. Failure to Acquire Emergency 78 sec.[ NA Exercise Time Duration 20 min. 5--50 min. 5 min. Undervoltage Dropout Time
  6. 0.5 sec. NA Underfrequency Dropout Time 3 sec. NA * Optional accessory board required for time delay adjustments. NA = not adjustable [ Allows for three 15 sec. crank attempts separated by two 15 sec. rest periods. Figure 2-2 Time Delays Factory Setting Time Delay Setting Switch Position (1--0) Range Increment Engine Cooldown 5 minutes 5 1--10 minutes 1 minute Engine Start 3 seconds 3 1--10 seconds 1 second Transfer from Normal to Emergency 3 seconds 3 1--10 seconds 1 second Retransfer from Emergency to Normal 6 minutes 2 3--30 minutes 3 minutes Exercise Run Time 20 minutes 4 5--50 minutes 5 minutes Figure 2-3 Accessory Board Time Delay Switch Settings MP-6346 12/05 17 Section 2 Operation
  7. 4. Verify that the generator set engine starts and the GEN Available LED flashes.
  8. 5. For a loaded test, the switch transfers the load to the emergency source (generator set) after the transfer to Emergency time delay. Verify that the Utility Source Position LED goes out and the GEN Position LED lights.
  9. 6. Press and hold the Test button for 2 seconds to end the test.
  10. 7. For a loaded test, the switch transfers the load to the normal (utility) source. Verify that the GEN Position LED goes out and the Utility Position LED lights. Note: The retransfer time delay does not operate during the test sequence.

Source: manual:MP6346.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.