KOHLER KEP Transfer Switch User Guide

: June 17, 2024
: Kohler

Table of Contents

KOHLER KEP Transfer Switch
Product Information
Product Usage Instructions
Transfer Switch Standard Features
Automatic Transfer Switch Controller
Ratings
Cable Sizes
Circuit Breaker Specifications
Weights and Dimensions
Accessories
Model Designation
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

KOHLER KEP Transfer Switch

KOHLER-KEP-Transfer-Switch-PRO

Product Information

Specifications:

Model: KEP
Product Type: Automatic Transfer Switches Service Entrance Rated Controller
Controller: Decision-Maker MPAC 1500
Ratings:
- Power Switching Device: Molded case (MCCB) / Insulated Case (ICCB)
- Current: 200A (MCCB), 100-1200A (ICCB), 800-4000A (ICCB)
- Voltage, Frequency: 208-240 VAC 60 Hz, 208-480 VAC 60 Hz, 208-480 VAC, 60 Hz

Product Usage Instructions

Transfer Switch Standard Features:
The service entrance automatic transfer switches include various features such as enclosed contact power switching units with isolating mechanisms, UL 1008 listing, seismic certification, fully enclosed silver alloy contacts, short circuit current withstand testing, separate utility and generator power switching units, and more.

Service Disconnect Switch:
The service disconnect switch allows you to move the switch to the OFF position. It is a two-position switch with a padlockable cover that disconnects the normal and emergency sources. The controller display will show Service Disconnected, and the NOT IN AUTO LED will flash. An indicator lamp will illuminate to show that the switch is in the DISCONNECT position.

Automatic Transfer Switch Controller:
The Decision-Maker MPAC 1500 Controller features an LCD display with 4 lines x 20 characters, backlit for visibility. It offers complete programming and viewing capability at the door using the keypad and LCD display. LED indicators for source availability, transfer switch position, service required (fault), and not in auto are provided. Modbus communication is standard, and it allows for programmable voltage and frequency pickup and dropout.

FAQ:

Q: What enclosures are available for the transfer switch?
A: NEMA 1, 3R, 4X, and 12 enclosures are available for the transfer switch.
Q: Can the transfer switch be manually operated?
A: Yes, the transfer switch has safe manual operation that permits easy operation even under adverse conditions.
Q: What types of overcurrent protection are included in the molded case circuit breakers and insulated case circuit breakers?
A: Molded case circuit breakers (MCCB) include thermal-magnetic or electronic trip overcurrent protection (80% rated), while insulated case circuit breakers (ICCB) include electronic trip overcurrent protection (100% rated).

Controller

Decision-Makerr MPAC 1500

Ratings

Power Switching Device	Current	Voltage, Frequency
Molded case (MCCB)	200	208- 240 VAC 60 Hz
100- 1200	208- 480 VAC 60 Hz
Insulated Case (ICCB)	800- 4000	208- 480 VAC, 60 Hz

Transfer Switch Standard Features

Enclosed Contact Power Switching Units

Service entrance automatic transfer switches incorporate an isolating mechanism and overcurrent protection on the utility supply, eliminating the need to have a separate, upstream utility source circuit breaker/disconnect switch.
UL 1008 listed, file #58962
IBC seismic certification available
Fully enclosed silver alloy contacts provide high withstand rating.
3-cycle short circuit current withstand-tested in accordance with UL 1008
Completely separate utility and generator set power switching units provide redundancy (no common parts) and are easy to service.
Utility disconnect power switching units have overcurrent protection; generator disconnect is available with or without overcurrent protection:
- Molded case circuit breakers (MCCB) include thermal-magnetic or electronic trip overcurrent protection (80% rated).
- Molded case switches (MCSW) do not include overcurrent protection (100% rated) (available on generator disconnect only).
- Insulated case circuit breakers (ICCB) include electronic trip overcurrent protection (100% rated).
- Insulated case switches (ICSW) do not include overcurrent protection (100% rated) (available on generator disconnect only).
Inherent stored-energy design prevents damage if manually switched while in service.
Heavy-duty brushless gear motor and operating mechanism provide mechanical interlocking and extreme long life with minimal maintenance.
Safe manual operation permits easy operation even under adverse conditions.
All mechanical and control devices are visible and readily accessible.
Padlockable service disconnect control switch
Status indicators
Two-position control circuit isolation switch disconnects utility power to the transfer switch controller.
Load shed (Forced transfer from Emergency to OFF). (Customer-supplied signal [contact closure] is required for the forced transfer to OFF function.)
ZEMA 1, 3R, 4X and 12 enclosures are available.

Service Disconnect Switch

Service disconnect to OFF position
Two-position switch with padlockable cover disconnects the normal and emergency sources.
Controller display shows Service Disconnected and the NOT IN AUTO LED flashes.
Lamp illuminates to indicate that the switch is in the DISCONNECT position.

Automatic Transfer Switch Controller

The Decision-Makerr MPAC 1500 Automatic Transfer Switch Controller is used on service entrance transfer switch models.

Decision-Makerr MPAC 1500 Controller

LCD display, 4 lines x 20 characters, backlit
Complete programming and viewing capability at the door using the keypad and LCD display
LED indicators: Source available, transfer switch position, service required (fault), and “not in auto”
Modbus communication is standard
Programmable voltage and frequency pickup and dropout settings
Programmable time delays
Programmable generator exerciser
Time-based load control
Current-based load control (current sensing kit required)
Two programmable inputs and two programmable outputs (one programmable input and one programmable output are used for factory connections on these models and are not available for customer connection)
Up to four I/O extension modules available
RS-485 communication standard
Ethernet communication standard
Three-source system
Prime power

For more information about Decision-Makerr MPAC 1500 features and functions, see specification sheet G11- 128.

Ratings

**Withstand Current Ratings in RMS Symmetrical Amperes ***

(No upstream circuit breaker protection required)

Power

Switching Device

| Switch Rating, Amps| Voltage, Max.| Amps RMS
@ 240 V| @ 480 V
Molded case| 100| 600| 65,000| 25,000
150
200| 240| 100,000| NA
250| 600| 65,000| 65,000
400| 600| 65,000| 50,000
600
800
1000
1200
Insulated case| 800| 600| 100,000| 100,000
1000
1200
1600
2000
2500
3000
4000

With molded case/insulated case switching devices equipped with integral overcurrent protection. (UL 1008 WCR)

Typical Single-Line Diagram

$KOHLER-KEP-Transfer-Switch- $2$$

Application Data

Auxiliary Position-Indicating Contacts

MCCB Models| Use programmable digital outputs
ICCB Models| 3 Normal, 2 Emergency

Rated 2.5 A @ 24/48 VDC, 6 A @ 480VAC

Environmental Specifications

Operating Temperature| – 15°C to 50°C (5°F to 122°F)
Storage Temperature| – 20°C to 70°C (- 4°F to 158°F)
Humidity| 95% noncondensing

Cable Sizes

Model	Amps	Cable Sizes, Al/Cu Wire
Circuit Breaker (per Phase)	Neutral	Ground
KEP, MCCB	100	(1) #14 – 1/0 AWG
150	(2) #2 – 4/0 AWG
200	(1) #6 – 350 KCMIL	(3) #6 – 350 KCMIL

1200

Circuit Breaker Specifications

KEP Molded Case Circuit Breakers (MCCB)

Function

| Trip Unit| Type| Trip Unit

Function

ABB| 100| Tmax Ts3| NI| BM/EL| TM| NI| BM/EL| TM
150| Tmax Ts3
200| Tmax Ts3
250 2P/3P| Tmax T5| PR221| Electronic| LS/I| PR221| Electronic| LS/I
250 4P| Isomax S5| PR211| Electronic| LI| PR211| Electronic| LI
400| Tmax T6| PR221| Electronic| LS/I| PR221| Electronic| LS/I
600| Tmax T6
800| Tmax T6
1000| Tmax T7| PR331/P| Electronic| LSIG| PR231/P
1200| Tmax T7
NI = Non-interchangeable TM = Thermal/ Magnetic

BM/EL = Bimetal/ Electromagnet MCSW = Molded Case Switch

KEP Insulated Case Circuit Breakers (ICCB)

Function

| Trip Unit| Type| Trip Unit

Function

Schneider| NW| 800| ML 5.0A| Electronic| LSI| ML 3.0| Electronic| LI
NW| 1000|

ML 6.0A

| Electronic| LSIG| ML 3.0| Electronic| LI
NW| 1200
NW| 1600
NW| 2000
NW| 2500
NW| 3000
NW| 4000
ICSW = Insulated Case Switch

ML = Micrologic

Weights and Dimensions

Note: Always use the transfer switch dimension drawing for planning and installation. Weights and dimensions may vary for different configurations. See your local distributor for dimension drawings.
Weights and dimensions are shown for NEMA type 1 enclosures. Consult the factory for other enclosure types.

Molded Case Circuit Breaker (MCCB) Models

Model| Amps| Dimensions, mm (in.)| Weight, kg (lb.)| Dimension Drawing
Poles| Height| Width| Depth| 2P| 3P| 4P
KEP, MCCB| 100-150| 2,3,4| 914 (36.0)| 725 (28.5)| 462 (18.2)| 68 (150)| 68 (150)| 68 (150)| ADV-8612
200| 2,3| 914 (36.0)| 725 (28.5)| 462 (18.2)| 68 (150)| 68 (150)| N/A
250| 2,3,4| 914 (36.0)| 725 (28.5)| 462 (18.2)| 81 (178)| 81 (178)| 81 (178)
400| 2,3,4| 1231 (48.4)| 995 (39.2)| 486 (19.1)| 195 (430)| 195 (430)| 195 (430)| ADV-8614
600-800| 2,3,4| 1231 (48.4)| 995 (39.2)| 486 (19.1)| 200 (441)| 200 (441)| 200 (441)
1000-1200| 3,4| 2009 (79.1)| 864 (34.0)| 515 (20.3)| N/A| 247 (545)| 254 (560)| ADV-8996
Insulated Case Circuit Breaker (ICCB) Models

Model| Amps| Poles| Dimensions, mm (in.)| Weight, kg (lb.)| Dimension Drawing
Height| Width| Depth
KEP, ICCB| 800| 3| 2324 (91.5)| 914 (36.0)| 1219 (48.0)| 544 (1200)| ADV-8618
4| 2324 (91.5)| 914 (36.0)| 1219 (48.0)| 635 (1400)
1000-1200| 3| 2324 (91.5)| 914 (36.0)| 1219 (48.0)| 553 (1220)
4| 2324 (91.5)| 914 (36.0)| 1219 (48.0)| 644 (1420)
1600| 3| 2324 (91.5)| 914 (36.0)| 1372 (54.0)| 598 (1320)
4| 2324 (91.5)| 914 (36.0)| 1372 (54.0)| 625 (1380)
2000| 3| 2324 (91.5)| 914 (36.0)| 1372 (54.0)| 607 (1340)
4| 2324 (91.5)| 914 (36.0)| 1372 (54.0)| 644 (1420)
2500| 3| 2324 (91.5)| 914 (36.0)| 1524 (60.0)| 625 (1380)
4| 2324 (91.5)| 1067 (42.0)| 1524 (60.0)| 662 (1460)
3000| 3| 2324 (91.5)| 914 (36.0)| 1524 (60.0)| 644 (1420)
4| 2324 (91.5)| 1067 (42.0)| 1524 (60.0)| 680 (1500)
4000| 3| 2324 (91.5)| 1372 (54.0)| 1524 (60.0)| 907 (2000)

Codes and Standards

The ATS meets or exceeds the requirements of the following specifications:

EN61000-4-4 Fast Transient Immunity Severity Level 4
EN61000-4-5 Surge Immunity Class 4 (voltage sensing and programmable inputs only)
IEC Specifications for EMI/EMC Immunity:
- CISPR 11, Radiated Emissions
- IEC 1000-4-2, Electrostatic Discharge
- IEC 1000-4-3, Radiated Electromagnetic Fields
- IEC 1000-4-4, Electrical Fast Transients (Bursts)
- IEC 1000-4-5, Surge Voltage
- IEC 1000-4-6, Conducted RF Disturbances
- IEC 1000-4-8, Magnetic Fields
- IEC 1000-4-11, Voltage Dips and Interruptions
IEC 60947-6-1, Low Voltage Switchgear and Control Gear; Multifunction Equipment; Automatic Transfer Switching Equipment
IEEE Standard 446, IEEE Recommended Practice for Emergency and Standby Power Systems for Commercial and Industrial Applications
IEEE 472 (ANSI C37.90A) Ring Wave Test
NEMA Standard ICS 10- 2005, Electromechanical AC Transfer Switch Equipment
NFPA 70, National Electrical Code
NFPA 99, Essential Electrical Systems for Health Care Facilities
NFPA 110, Emergency and Standby Power Systems
Underwriters Laboratories UL 1008, Standard for Automatic Transfer Switches for Use in Emergency Standby Systems file #58962

Accessories

Accessories are available either factory-installed or as loose kits, unless otherwise noted.

**Digital Meter ***

Measure and display voltage, current, frequency, and power
35 programmable alarms
LCD display, 67 x 62.5 mm (2.65 x 2.5 in.)
Pushbutton operation
Password- protected programming menus
Two digital inputs
Two digital outputs
Two Form A relay outputs
Serial port for optional network connections
Data logging
Factory- installed
Meter kit not available on MCCB models with NEMA 3R enclosures.

Heater, Anti-Condensation

Hygrostat-controlled 120 VAC strip heater (customer-supplied voltage source required)
100 or 250 watts (sized for enclosure)
Protective 15 Amp circuit breaker

Literature Kits

Production literature kit (one set of literature is included with each transfer switch)
Overhaul literature kit

RSA III Remote Serial Annunciator

Monitors the generator set
Monitors Normal and Emergency source status and connection
Monitors ATS common alarm
Allows remote testing of the ATS
For more information, see specification sheet G6- 139.

Seismic Certification

Certification depends on application and geographic location. Contact your distributor for details.
Available for the transfer switches and enclosures shown below:
ATS Type and Size| Enclosure, NEMA Type:
---|---
Type| Amps| 1| 3R| 4X| 12
MCCB| 100- 600| | | •|
MCCB| 100- 1200| •| •| | •
ICCB| 800- 4000| •| •| |

Surge Protection Device (SPD)

SPD available for the normal source supply
Surge protection reduces transient voltages to harmless levels
Protection modes: L-L / L-N / L-G / N-G
Replaceable phase and neutral cartridges for service
Frequency: 50- 60 Hz
Operating Temperature Range: – 40 to 176_F (- 40 to 80_C)
Remote contacts for customer-supplied status indicators:
- Contacts: 1 NO, 1 NC
- Min Load: 12VDC / 10 mA
- Max. Load: 250 VAC / 1 A
- Wire Size (max.): 16AWG
Fuse protection: 30 amps / 600 V
UL 1449, 3rd Edition for Type 2 applications
IEC 61-643-1, 2nd Edition T2/11
See additional specifications below

Extended Warranties

2-year basic
5-year basic
5-year comprehensive
10-year major components

Controller Accessories
See the controller specification sheet for more information.

Accessory Modules
- Alarm Module
- External Battery Supply Module
- Input/Output Module
- High-Power Input/Output Module
Current Sensing Kit
Line-to-Neutral Voltage Monitoring
Padlockable User Interface Cover

SPD Specifications

Model Designation

$KOHLER-KEP-Transfer-Switch- $3$$

Record the transfer switch model designation in the boxes. The transfer switch model designation defines characteristics and ratings as explained below.

$KOHLER-KEP-Transfer-Switch- $4$$ $KOHLER-KEP- Transfer-Switch- $5$$

Availability is subject to change without notice. Kohler Co. reserves the right to change the design or specifications without notice and any obligation or liability whatsoever. Contact your local Kohler generator distributor for availability.