Kohler G/GN, GLN/GLS, GTN/GTS Automatic Transfer Switches Operation and Installation Manual (tp5993)

These Kohler automatic transfer switches sit between your utility feed and the generator, usually in plant rooms, mechanical spaces, or outdoor enclosures, and their whole job is to move the load cleanly when the power goes out and comes back. This manual is what I’d keep on hand when I’m mounting a new switch, landing cables, setting up control wiring, and confirming it actually transfers the way it should. If you’ve got a nuisance transfer, a switch that won’t return to utility, or a unit that chatters during brownouts, this is the book you use to trace the problem step by step instead of guessing.

Applications & Use Cases

• Plan and verify installation of G/GN, GLN/GLS, GTN/GTS switches so they’re mounted, grounded, and routed correctly.
• Wire and terminate power and control circuits, then double-check you’ve landed each conductor on the proper terminals.
• Set up operating parameters so the switch transfers at the right time and in the right conditions for your site.
• Troubleshoot transfer faults by isolating whether the issue is utility, generator sensing, or the mechanism itself.
• Support parts identification by matching the exact switch type and options before ordering components.

FAQ

Q: Can I keep this manual on a tablet in the field?

A: Yes, it’s practical to use digitally so you can zoom in on diagrams and search quickly while you’re at the switchboard.

Q: Should I also print a copy for the electrical room?

A: That’s a good idea; a clean printed copy in a plastic sleeve near the switch makes testing and inspections much easier.

Safety Note

Always isolate all power sources, verify zero energy, and follow lockout/tagout procedures before opening or working inside the transfer switch.

Kohler G/GN, GLN/GLS, GTN/GTS Automatic Transfer Switches Index:

Safety Precautions and Instructions
Introduction
List of Related Materials
Service Assistance
Service Information
Product Identification

Section Specifications
Standard Features
Optional Features

Section Operation
Startup
Controls and Indicators
Automatic Operation
Normal Source Failure
Normal Source Restoration

Section Accessories
Typical Mounting Locations
KA Through KA Time Delays
KA Test Switches
KA Bypass Time Delay Switch
KA Preferred Source Switches
KA Panel Lamps
KA Auxiliary Relay Contacts
KA Main Shaft Auxiliary Contacts
KA Meters
KA Plant Exercisers
Resetting the Clock
Initial Setup Time and Day
Programming the Plant Exercise and Shutdown Times
Resetting the Time
Reviewing the Program
Modifying an Existing Program
Manual Override
Continuous Manual Operation
Ending Continuous Manual Operation
KA Battery Charger
Specifications
Installation Connections
Disconnecting the Charger Before Replacing or Servicing the Battery
Reconnecting the Charger After Replacing or Servicing the Battery
Charging Lead Acid Batteries
Charging Nickel Cadmium Batteries
Charger Voltage Adjustment
Charger and Battery Maintenance
KA Area Protection Relay
KA Logic Protection Fuses
KA Manual Operation Switches
KA Inphase Monitor and Synchronism Check Relay
KA Inphase Monitor
KA Synchronism Check Relay
KA Load Shedding Contacts

Section Scheduled Maintenance
Inspection and Service
General Inspection
Other Inspections and Service
Testing
Weekly Generator Set Exercise
Monthly Automatic Operation Test
Service Schedule

Section Installation
Upon Receipt of Unit
Inspection
Lifting
Unpacking
Storage
Mechanical Installation
Check Manual Operation
Electrical Wiring
AC Power Connections
Controller Logic
Accessory and Control Connections
Functional Tests
Voltage Check
Automatic Operation Test
Controller Setup

Appendix Glossary of Abbreviations

Kohler