OPERATION
Catalog 214A400, 214A404, and 214A401 ATS Annunciators communicate with ASCO automatic transfer switches to report their status. Each automatic transfer switch is continuously polled and reports its status back to the ATS Annunciator. Lights on the front indicate which automatic transfer switches are connected to the normal source or emergency source. Source availability is also reported.
In addition, the ATS Annunciators can send commands to individual automatic transfer switches
to control their operation. A key switch prevents unauthorized operation. The Transfer Test push button simulates a normal source outage and transfers the individual load to the emergency source, if available. When the same push button is pressed again, it signals the automatic transfer switch to retransfer back to normal immediately. A Time Delay Active push button bypasses any transfer time delay in process (Feature 2B or 3A). Lights above each push button indicate that the automatic transfer switch is in the test mode and in a time delay mode.
HOW TO TEST AN AUTOMATIC TRANSFER SWITCH FROM THE ATS ANNUNCIATOR
1.Insert the switch key and turn it clockwise to the Unlock position as shown in Figure7.
2.Select the number of the automatic transfer switch you want to test and find the Transfer Test push button below the ATS number on the bottom row.
3.Press and hold the Transfer Test push button until the amber light above it starts flashing.
4.Observe that the Emergency Source Available red light comes on indicating that the generator has started.
5.Observe that the Load Connected to Emergency red light comes on (Normal light off) indicating that the ATS has transferred.
Note: If Feature 2B Transfer to Emergency Time Delay is used (Time Delay Active) amber light comes on) the transfer may not occur for up to 5 minutes. To bypass this time delay press the Time Delay Active push button below the amber light.
key switch
6.Press the Transfer Test push button again to end the test. The flashing amber light goes off.
Note: If Feature 3A Retransfer to Normal Time Delay is used (Time Delay Active amber light comes on) the retransfer may not occur for up to 30 minutes. To bypass this time delay press the Time Delay Active push button below the amber light.
7.Observe that the Load Connected to Normal green light comes on (Emergency light off) indicating that the ATS has retransferred.
Note: The Emergency Source Available red light goes off when the emergency source is no longer available.
8.When testing is completed, turn the key switch counterclockwise to the Lock position and remove the key.
status lights
Load connected to
Source available
Time delay active
Time delay bypass
push button
Transfer test
Transfer test push button
Figure 7. ATS Annunciator (Master)
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