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ats:inteli
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| ats:inteli [2024/05/27 17:34] – [Auto Mains Fail Transfer Switch] Alan Shea | ats:inteli [2024/09/21 22:24] (current) – [117 ATS -- Automatic Transfer Switch-Contactor] Alan Shea | ||
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| Line 8: | Line 8: | ||
| The appropriate size of motor contactors should be selected based on the load served and the genset size. The 400A frame is a good general purpose selection, but smaller or larger can substituted. Recommended source: [[https:// | The appropriate size of motor contactors should be selected based on the load served and the genset size. The 400A frame is a good general purpose selection, but smaller or larger can substituted. Recommended source: [[https:// | ||
| - | * //See the discussion at [[ats: | + | * //See the discussion at [[ats:start# |
| + | |||
| + | ---- | ||
| + | \\ | ||
| + | <WRAP center round alert 60%> | ||
| + | \\ | ||
| + | **See warnings below** | ||
| + | </ | ||
| + | \\ | ||
| + | ---- | ||
| =====One-Line Diagram=== | =====One-Line Diagram=== | ||
| - | {{: | + | {{: |
| ===Auto Mains Fail Transfer Switch== | ===Auto Mains Fail Transfer Switch== | ||
| <WRAP col2> | <WRAP col2> | ||
| + | One-line diagram, detailed schematic/ | ||
| * {{ : | * {{ : | ||
| * {{ : | * {{ : | ||
| Line 70: | Line 80: | ||
| - Genset stops | - Genset stops | ||
| - | ====Manual Bypass=== | + | ====Force Generator Operation |
| - | * Operating S2, Manual Bypass, forces selection of Utility or Generator power and bypasses InteliATS controls | + | * Operating S2, Auto/ |
| - | * S2 is mounted inside protective shroud to prevent casual operation | + | |
| - | * Operating S1, Auto/Gen, forces selection of Generator by InteliATS | + | |
| * InteliATS will start generator, qualify power, then turn off K-U [3] and turn on K-G [5] after setpoint delay (as short as 1mS). | * InteliATS will start generator, qualify power, then turn off K-U [3] and turn on K-G [5] after setpoint delay (as short as 1mS). | ||
| - | * Switching | + | * Switching |
| + | |||
| + | ====Manual Bypass=== | ||
| + | <wrap important> | ||
| + | Voltage, frequency, and phase monitoring is inactive while either bypass mode is active! | ||
| + | </ | ||
| + | |||
| + | * Operating S3, Manual Bypass, forces selection of Utility or Generator power and bypasses InteliATS controls, switching InteliATS to " | ||
| + | * S4 is a 3-position center return selector switch with " | ||
| + | * S4 is only enabled when S3 is not in " | ||
| + | * When S3 is in either " | ||
| + | * S3 is mounted inside a protective shroud to prevent casual operation. | ||
| + | * Placing S3 in the City (Utility) disables genset auto-start and K-GC (5) | ||
| + | * To turn on City/ | ||
| + | * To turn off the City/ | ||
| + | * Low voltage from City power will not open contactor K-UC (3) until the voltage falls to approximately 60VAC. | ||
| + | * Placing S3 in the Generator position disables K-UC (3), City Power and starts the Generator. | ||
| + | * To switch on Generator power, momentarily turn S4 to the " | ||
| + | * To turn off the Generator Power, momentarily turn S4 to the " | ||
| + | * Power to the load will remain OFF until S3 is returned to AUTO, or switched to CITY. | ||
| + | * If the generator fails (or runs out of fuel) and the voltage falls below approximately 60VAC, contactor K-UG (5) will open by itself. | ||
| + | * Allowing this to happen can damage equipment, including the generator diodes. | ||
| + | |||
| + | |||
| ====Emergency Stop=== | ====Emergency Stop=== | ||
| Line 83: | Line 115: | ||
| =====Bill of Materials== | =====Bill of Materials== | ||
| + | **// | ||
| ====117 ATS -- Automatic Transfer Switch-Contactor=== | ====117 ATS -- Automatic Transfer Switch-Contactor=== | ||
| * [[https:// | * [[https:// | ||
| Line 92: | Line 124: | ||
| < | < | ||
| + | {{page>: | ||
| + | |||
| + | <WRAP center round alert 70%> | ||
| + | **DANGER:** Current transformers must be connected to a device, or short-circuited before power is applied in the circuit to be measured. Current transformers are //constant current// devices, not //constant voltage// like ordinary transformers. | ||
| + | |||
| + | * **A C.T. with loose leads can have lethal voltage on the terminal, possibly over 1000V.** | ||
| + | |||
| + | * **Do not disconnect a C.T. when power is present in the measured circuit!** | ||
| + | </ | ||
ats/inteli.1716831298.txt.gz · Last modified: 2024/05/27 17:34 by Alan Shea
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