Series 185 | CONTROLLER |
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The Group 4 digital Controller is used in ASCO Series 185 automatic transfer switches. It provides the sensing, timing, and control functions for the ATS. This micro–
clock battery cover see page 3
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| Utility |
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| Acceptable |
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| light |
Transfer |
| Load on |
Test |
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| Utility light | |
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button |
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Bypass |
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Time Delay |
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button |
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Set Engine |
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Exerciser |
| Load on |
button |
| Generator |
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| light |
Automatic |
| Generator |
Generator |
| Acceptable |
Exerciser |
| light |
light |
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Figure 3. Front view of controller.
1 --- Push Buttons
On the front control display are three push buttons that control the operation of the generator and the ATS.
Before using the transfer test button, be sure that conditions are safe for running the generator and for load transfer.
Transfer Test
Use this button to test the system. This operation starts the generator and transfers the load. Be sure that conditions are safe to do this operation.
Bypass Time Delay
Use this button to cancel the active time delay or exercise period (stops the generator after cooldown).
Set Engine Exerciser
Use this button to set the automatic generator exerciser (page 3).
2 --- Indicator Lights
On the front control display are five lights that indicate the status of the sources and the ATS.
Utility Acceptable
This light indicates that the utility voltage is acceptable for connection to the load.
Generator Acceptable
This light indicates that the generator voltage is acceptable for connection to the load.
Load on Utility
This light indicates that the load is connected to the utility.
Load on Generator
This light indicates that the load is connected to the generator.
Automatic Generator Exerciser
This light indicates the status of the generator exerciser:
---blinks during the exercise period (including cooldown).
---stays on when the exerciser has been set.
---is off when the exerciser has not been set.
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