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Kohler KCC, KBC Closed-Transition Automatic Transfer and Bypass, Isolation Switches Operation and Installation Manual (tp6737)

Format: PDF (Printable Document)

File Language: English

File Pages: 60

File Size: 15.15 MB (Speed Download Link)

Brand: Kohler

Model: KCC, KBC Closed-Transition Automatic Transfer and Bypass, Isolation Switches

Book No: tp6737

Type of Document: Operation and Installation Manual

Categories: ,

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Kohler KCC, KBC Closed-Transition Automatic Transfer and Bypass, Isolation Switches Operation and Installation Manual (tp6737)

Kohler KCC, KBC Closed-Transition Automatic Transfer and Bypass, Isolation Switches Operation and Installation Manual (tp6737)

These Kohler KCC/KBC closed‑transition automatic transfer and bypass/isolation switches usually sit in plant rooms, data centers, hospitals, or commercial buildings, quietly handling the handoff between utility and generator power. This manual is what I keep close when I’m installing, setting up, or verifying one of these switchboards so the transfer happens smoothly without dropping critical loads. If the switch hesitates to transfer back to utility after a test run, this is the book I use to trace the control logic, verify settings, and confirm the bypass/isolation procedure before I put a screwdriver on anything.

Applications & Use Cases

  • Install a new switchboard correctly, with proper mounting, wiring routes, and control connections.
  • Commission or re‑commission a unit after repairs, verifying transfer timing and closed‑transition behavior.
  • Trace a transfer fault, like nuisance trips or failure to return to normal source, without guesswork.
  • Safely bypass and isolate the switch so you can service it while keeping the facility energized.
  • Confirm parts and options when ordering replacement components or planning an upgrade.
  • Document settings and changes so the next technician understands how the switch is configured.

FAQ

Q: Can I keep this manual on a tablet and still use it effectively on site?

A: Yes, it works well digitally; just zoom in on diagrams and keep the device in a clean, dry spot while you work.

Q: Is it worth printing sections of this manual?

A: I usually print the key procedures and wiring diagrams I need for the day and keep them in a plastic sleeve near the switchboard.

Safety Note

Always de‑energize and verify absence of voltage before opening enclosures or adjusting any connections on these switches.

📘 Show Index

Kohler KCC, KBC Closed-Transition Automatic Transfer and Bypass, Isolation Switches Index:

Product Identification Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Safety Precautions and Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
List of Related Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Service Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Section 1 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.1 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.2 Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.3 Model Designation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.3.1 Model KCC Closed-Transition Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.3.2 Model KBC Closed-Transition Bypass/Isolation Switch . . . . . . . . . . . . . 14
Section 2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.2 Receipt of Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.2.1 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.2.2 Lifting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.2.3 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.2.4 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.4 Seismic Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.5 Manual Operation Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.5.1 Manual Operation Test Procedure, 150–1200 Amp Model KCC . . . . . . 19
2.5.2 Manual Operation Test Procedure, 1600–4000 Amp Model KCC . . . . . 21
2.5.3 Manual Operation Check, Model 150–1200 Amp Model KBC
Bypass/Isolation Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.5.4 Manual Operation Check, Model 1600–4000 AMP Model KBC
Bypass/Isolation Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.6 Controller Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.6.1 Contactor Harness Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.6.2 Other Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.6.3 Controller Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.7 Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.7.1 Source and Load Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.7.2 Extended Transfer Time Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2.7.3 Engine Start Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2.7.4 Auxiliary Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2.8 Functional Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2.9 System Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2.10 Exerciser Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2.11 Startup Notification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Section 3 Functional Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.2 Manual Operation Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.3 Voltage Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.4 Lamp Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.5 Automatic Operation Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Section 4 Bypass and Isolation, Model KBC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.1.1 Bypassing Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.1.2 Isolating Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table of Contents, continued
4 Table of Contents TP-6737 6/11
4.2 150–600 Amp Models (Connection B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.2.1 Bypassing ATS,
150–600 Amp Connection B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.2.2 Isolating the Transfer Switch 150–600-Amp Connection B . . . . . . . . . . 37
4.2.3 Return to Service,
150–600 Amp Connection B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.2.4 Return Bypass Switch to OPEN
150–600 Amp Connection B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.2.5 Manual Load Transfer,
150–600 Amp Connection B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.3 800–1200 Amp Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4.3.1 Bypassing ATS, 800–1200 Amps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4.3.2 Isolating the ATS, 800–1200 Amps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4.3.3 Return to Service, 800–1200 Amp Models . . . . . . . . . . . . . . . . . . . . . . . . 47
4.3.4 Return Bypass Switch to OPEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4.3.5 Manual Load Transfer, 800–1200 Amp Models . . . . . . . . . . . . . . . . . . . . 49
4.4 1600–4000 Amp Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4.4.1 Bypassing Transfer Switch, 1600–4000 Amp Models . . . . . . . . . . . . . . . 50
4.4.2 Isolating Transfer Switch, 1600–4000 Amp Models . . . . . . . . . . . . . . . . . 51
4.4.3 Removing Transfer Switch, 1600–4000 Amp Models . . . . . . . . . . . . . . . 52
4.4.4 Reinstalling Transfer Switch, 1600–4000 Amp Models . . . . . . . . . . . . . . 54
4.4.5 Return to Operation, 1600–4000 Amp Models . . . . . . . . . . . . . . . . . . . . . 54
4.4.6 Manual Load Transfer, 1600–4000 Amp Models . . . . . . . . . . . . . . . . . . . 56
Appendix A Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

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