Format: PDF (Printable Document)
File Language: English
File Pages: 43
File Size: 8.39 MB (Speed Download Link)
Brand: Kohler
Model: 30-800 Amp Series R38 and Series S38 Automatic Transfer Switches Contactor
Book No: tp5135
Type of Document: Service Manual
$ 40
These Kohler R38 and S38 automatic transfer switches sit between utility and generator power, usually in commercial buildings or critical facilities where downtime is expensive. This service manual is what I’d pull out when I need to prove whether a transfer contactor or its related hardware has actually failed before ordering parts. For example, if a switch hesitates transferring back to utility after a power return, this book walks you through the checks to trace if it’s a control issue, a mechanical bind, or a contactor problem.
Applications & Use Cases
FAQ
Q: Can I keep this manual on a tablet at the jobsite?
A: Yes, it works well digitally; just use the search function to jump to the checks for your specific symptom.
Q: Should I still print parts of it?
A: Printing the key diagnostic and adjustment pages is handy when you’re in a tight electrical room without safe device access.
Safety Note
Always de-energize and lock out all power sources to the transfer switch before opening, testing, or adjusting any components.
SUBJECT
Introduction
Service Assistance
General Maintenance
Transfer Switch Part Number Explanation
Section 1.30 through 150 Amperes
Manual Operation .
Coil Change for Contactor Voltage Conversion
Coil Replacement 30-104 Ampere
Coil Replacement 150 Ampere .
Coil Clearing Contacts Replacement
and Adjustment .
Auxiliary Contacts/Miniature Contacts
Auxiliary Contacts
Miniature Contacts
Main Contacts — Inspection .
Rectifier Check
Coil Resistance Values
Section 2.225 through 400 Amperes
Manual Operation
Coil Change for Contactor Voltage Conversion .
Coil Replacement .
Coil Clearing Contacts Replacement
and Adjustment
Auxiliary Contacts/Miniature Contacts
Auxiliary Contacts .
Miniature Contacts ….. ….. ….. ….. ……
Main Contacts — Inspection .
Contactor Lug Replacement .
Arc Chute/Arc Runner Replacement
Stationary Main Contacts Replacement .
Movable Main Contacts Replacement
SUBJECT
Overlapping Neutral Transfer
Contacts Replacement .
Rectifier Check
Coil Resistance Values
Section 3.600 and 800 Amperes
Manual Operation .
Coil Change for Contactor Voltage Conversion
Coil Replacement
Coil Clearing Contacts Replacement
and Adjustment
Auxiliary Contacts/Miniature Contacts
Auxiliary Contacts
Miniature Contacts .
Main Contacts — Inspection .
Contactor Lug Replacement .
Arc Chute/Arc Runner Replacement
Stationary Main and Arcing Contacts
Replacement
Movable Main and Arcing Contacts
Replacement
Overlapping Neutral Transfer Contacts
Replacement
Adjustment of Main Contacts .
Rectifier/Resistor Check
Coil Resistance Values
Resistor Ohm Values
Section 4. Troubleshooting
Section 5. Wiring Diagrams
Appendix A. Non-Detachable Manual
Operating Handle 30-150 Amp. (600 Volt Class)
