125 ERESC Model: Standard Features
Model:
125ERESC
208--480 V
EPA-Certified for Stationary
Emergency Applications
Ratings Range
Standby:
kW
kVA
60 Hz
91--128
91--160
Gas
Standard Features
D Kohler Co. provides one-source responsibility for the
generating system and accessories.
D The generator set and its components are prototype-tested,
factory-built, and production-tested.
D UL 2200 listing is available.
D CSA approval is available.
D The generator set accepts rated load in one step.
D The 60 Hz generator set engine is certified by the
Environmental Protection Agency (EPA) to conform to the
New Source Performance Standard (NSPS) for stationary
spark-ignited emissions.
D A one-year limited warranty covers all systems and
components. Two- and five-year extended warranties are
also available.
D Alternator features:
d The unique Fast-Responset X excitation system delivers
excellent voltage response and short-circuit capability
using a rare-earth permanent magnet (PM)-excited
alternator.
d The brushless, rotating-field alternator has broadrange
reconnectability.
D Other features:
d Kohlerr Decision-Makerr 3000 controller. See Controllers
on page 3.
d The electronic, isochronous governor incorporates an
integrated drive-by-wire throttle body actuator delivering
precise frequency regulation.
D Quick-ship (QS) models with selected features and a
five-year basic warranty are available. See your Kohler
distributor for details.
Generator Set Ratings
Natural Gas
LPG
130_C Rise
130_C Rise
Standby Rating
Standby Rating
Alternator
Voltage
Ph Hz
kW/kVA
Amps
kW/kVA
Amps
120/208
3
60
124/155
430
105/131
364
127/220
3
60
125/156
410
105/131
344
120/240
3
60
124/155
373
105/131
316
120/240
1
60
91/91
379
91/91
379
4R12X
139/240 *
3
60
125/156
376
105/131
316
220/380 *
3
60
112/140
213
105/131
199
277/480
3
60
125/156
188
105/131
158
120/208
3
60
128/160
444
106/133
368
127/220
3
60
128/160
420
106/133
348
120/240
3
60
128/160
385
106/133
319
120/240
1
60
107/107
446
100/100
417
4R13X
139/240 *
3
60
128/160
385
106/133
319
220/380 *
3
60
124/155
235
106/133
201
277/480
3
60
128/160
192
106/133
159
4T13X
120/240
1
60
125/125
521
105/105
438
* Voltage configuration not available from the factory. Field-adjustable by an authorized service technician.
RATINGS: All three-phase units are rated at 0.8 power factor. All single-phase units are rated at 1.0 power factor. Standby Ratings: Standby ratings apply to installations served by a reliable utility source.
The standby rating is applicable to varying loads for the duration of a power outage. There is no overload capability for this rating. Ratings are in accordance with ISO-8528-1 and ISO-3046-1. For limited
running time and continuous ratings, consult the factory. Obtain the technical information bulletin (TIB-101) on ratings guidelines for the complete ratings definitions. The generator set manufacturer reserves
the right to change the design or specifications without notice and without any obligation or liability whatsoever. GENERAL GUIDELINES FOR DERATING: Altitude: Derate 1.3% per 100 m (328 ft.) elevation
above 200 m (656 ft.) up to a maximum elevation of 3000 m (9842 ft.). Temperature: Derate 2.0% per 10_C (18_F) temperature above 25_C (77_F) up to 50_C (122_F). For units having enclosures
with enclosed silencers, add 5_C (9_F) to the ambient temperature. For dual fuel engines, use the LPG ratings for both the primary and secondary fuels.
G4-223 (125ERESC) 10/13d
Alternator Specifications
Specifications
Manufacturer
Type
Exciter type
Leads: quantity, type
4RX
4TX
Voltage regulator
Insulation:
Material
Temperature rise
Bearing: quantity, type
Coupling
Amortisseur windings
Voltage regulation, no-load to full-load
Unbalanced load capability
One-step load acceptance
Peak motor starting kVA:
480 V
4R12X (12 lead)
480 V
4R13X (12 lead)
240 V
4T13X (4 lead)
D NEMA MG1, IEEE, and ANSI standards compliance for
temperature rise and motor starting.
Alternator
Kohler
4-Pole, Rotating-Field
Brushless, Rare-Earth
Permanent- Magnet
D Sustained short-circuit current of up to 300% of the rated
current for up to 10 seconds.
12, Reconnectable
4, 120/240
Solid State, Volts/Hz
NEMA MG1
Class H
130_C, Standby
1, Sealed
Flexible Disc
Full
±0.5%
100% of Rated Standby
Current
100% of Rating
(35% dip for voltages below)
448 (60 Hz)
540 (60 Hz)
440 (60 Hz)
D Sustained short-circuit current enabling downstream circuit
breakers to trip without collapsing the alternator field.
D Self-ventilated and dripproof construction.
D Vacuum-impregnated windings with fungus-resistant epoxy
varnish for dependability and long life.
D Superior voltage waveform from a two-thirds pitch stator and
skewed rotor.
D Total harmonic distortion (THD) from no load to full load with
a linear load is less than 3.3%.
Application Data
Engine
Engine Specifications
Manufacturer
Engine: model, type
Cylinder arrangement
Displacement, L (cu. in.)
Bore and stroke, mm (in.)
Compression ratio
Piston speed, m/min. (ft./min.)
Main bearings: quantity, type
Rated rpm
Max. power at rated rpm, NG, kW (HP)
Max. power at rated rpm, LPG, kW (HP)
Cylinder head material
Piston type and material
Crankshaft material
Valve (exhaust) material
Governor type
Frequency regulation, no-load to full-load
Frequency regulation, steady state
Frequency
Air cleaner type, all models
Engine Electrical
PSI
Industrial 8.8 L, 4-Cycle,
Turbocharged
V-8
8.8 (537)
110 x 114 (4.35 x 4.5)
10.1:1
411 (1350)
5, Bi-Metal Steel and
Aluminum
1800
142 (190)
121 (162)
Cast Iron
Flat Top, Hypereutectic
Cast Alum.
Forged Steel, Induction
Hardened, Tangential Fillet
Int.-A193 Exh. Inconel
Electronic
Isochronous
0.5%
Fixed
Dry
Exhaust
Exhaust System
Exhaust manifold type
Exhaust flow at rated kW, m3/min. (cfm)
Exhaust temperature at rated kW, dry
exhaust, _C (_F)
Maximum allowable back pressure,
kPa (in. Hg)
Exhaust outlet size at engine hookup
Dry
21.1 (745)
649 (1200)
10.2 (3.0)
See ADV drawing
Engine Electrical System
Ignition system
Battery charging alternator:
Ground (negative/positive)
Volts (DC)
Ampere rating
Starter motor rated voltage (DC)
Battery, recommended cold cranking
amps (CCA):
Qty., rating for --18_C (0F)
Battery voltage (DC)
Individual Coil
Near Plug Ignition
Negative
12
70
12
One, 630
12
Fuel
Fuel System
Fuel type
Fuel supply line inlet
Natural gas fuel supply pressure, kPa
(in. H2O)
LPG vapor withdrawal fuel supply
pressure, kPa (in. H2O)
Dual fuel engine, LP vapor withdrawal
fuel supply pressure, kPa (in. H2O)
Fuel Composition Limits *
Methane, % by volume
Ethane, % by volume
Propane, % by volume
Propene, % by volume
C4 and higher, % by volume
Sulfur, ppm mass
Lower heating value,
MJ/m3 (Btu/ft3), min.
Natural Gas, LPG, or
Dual Fuel
1.5 NPTF
1.74--2.74 (7-11)
1.24--2.74 (5-11)
1.24 (5)
Nat. Gas
90 min.
4.0 max.
1.0 max.
0.1 max.
0.3 max.
25 max.
LPG
1.2 max.
10 max
96 max.
3 max.
3 max.
25 max.
33.2 (890)
78.8 (2116)
* Fuels with other compositions may be acceptable. If your fuel is
outside the listed specifications, contact your local distributor for
further analysis and advice.
G4-223 (125ERESC) 10/13d
Application Data
Controller
Lubrication
Lubricating System
Type
Oil pan capacity, L (qt.)
Oil pan capacity with filter, L (qt.)
Oil filter: quantity, type
Full Pressure
8.0 (8.5)
8.5 (9.0)
1, Cartridge
Cooling
Decision-Makerr 3000 Controller
Radiator System
Ambient temperature, _C (_F)
Engine jacket water capacity, L (gal.)
Radiator system capacity, including
engine, L (gal.)
Engine jacket water flow, Lpm (gpm)
Heat rejected to cooling water at rated
kW, dry exhaust, kW (Btu/min.)
Heat rejected to engine oil at rated kW,
kW (Btu/min.)
Water pump type
Fan diameter, including blades, mm (in.)
Fan, kWm (HP)
Max. restriction of cooling air, intake and
discharge side of radiator, kPa (in. H2O)
45 (113)
13.4 (3.54)
Provides advanced control, system monitoring, and system diagnostics for
optimum performance and compatibility.
27.6 (7.3)
125 (33)
D Digital display and menu control provide easy local data access
73.5 (4184)
1.2 (67.5)
Centrifugal
660 (26)
8.9 (12.0)
D Measurements are selectable in metric or English units
D Remote communication through a PC via network or serial
configuration
D Integrated hybrid voltage regulator with 0.5% regulation
D Built-in alternator thermal overload protection
Refer to G6-100 for additional controller features and accessories.
0.125 (0.5)
Sound Enclosure
Operation Requirements
Air Requirements
Radiator-cooled cooling air,
m3/min. (scfm)[
Combustion air, m3/min. (cfm)
Heat rejected to ambient air:
Engine, kW (Btu/min.)
Alternator, kW (Btu/min.)
[ Air density = 1.20 kg/m3 (0.075 lbm/ft3)
306 (10800)
6.9 (244)
21.6 (1230)
15.7 (893)
Standby Rating
Fuel Consumption]
Natural Gas, m3/hr. (cfh) at % load
100%
75%
50%
25%
0%
42.8 (1511)
34.1 (1204)
25.2 (890)
16.5 (583)
6.8 (240)
LPG, m3/hr. (cfh) at % load
100%
75%
50%
25%
0%
] Nominal fuel rating:
17.7
13.4
9.5
5.9
2.7
MJ/m3
(626)
(473)
(334)
(209)
(95)
Btu/ft3)
Natural gas, 37
(1000
LPG, 93 MJ/m3 (2500 Btu/ft3)
LPG conversion factors:
8.58 ft.3 = 1 lb.
0.535 m3 = 1 kg.
36.39 ft.3 = 1 gal.
D Sound level (8 point logarithmic average) at 7 m (23 ft.) with full load:
73 dB(A).
D Sound level compared to competitor ratings with no load: 70 dB(A).*
D Sound attenuating enclosure uses acoustic insulation that meets
UL 94 HF1 flammability classification and repels moisture absorption.
D Vertical air inlet and outlet discharge with 90 degree bends to redirect
air and reduce noise.
D Internal-mounted critical silencer and flexible exhaust connector.
D Skid-mounted, steel (standard) or aluminum (optional) construction
with hinged doors.
D Fade-, scratch-, and corrosion-resistant Kohlerr Cashmere Power
Armort textured e-coat paint.
D Lockable, flush-mounted door latches.
D Certified to withstand 241 kph (150 mph) wind load rating (aluminum
enclosures only).
* Lowest of 8 points measured around the generator. Sound levels at
other points around generator may be higher depending on installation
parameters.
G4-223 (125ERESC) 10/13d
KOHLER CO., Kohler, Wisconsin 53044 USA
Phone 920-457-4441, Fax 920-459-1646
For the nearest sales and service outlet in the
US and Canada, phone 1-800-544-2444
KOHLERPower.com
Kohler Power Systems
Asia Pacific Headquarters
7 Jurong Pier Road
Singapore 619159
Phone (65) 6264-6422, Fax (65) 6264-6455
Additional Standard Features
D
D
D
D
D
D
D
D
D
D
Alternator Protection
Battery Rack and Cables
Electronic, Isochronous Governor
Gas Fuel System (includes fuel mixer, electronic secondary gas
regulator, gas solenoid valve, and flexible fuel line between the
engine and the skid-mounted fuel system components)
Integral Vibration Isolation
Local Emergency Stop Switch
Oil Drain Extension
Operation and Installation Literature
Steel Sound Enclosure
Three-Way Exhaust Catalyst
Available Options
Approvals and Listings
- CSA Approval
- UL 2200 Listing
Fuel System
- Dual Fuel NG/LPG (automatic changeover)
- Flexible Fuel Line
(required when the generator set skid is spring mounted)
- Gas Filter
- LP Liquid Withdrawal (vaporizer)
- Second Gas Solenoid Valve
Controller
Common Fault Relay
Communication Products and PC Software
Input/Output Module
Remote Annunciator Panel
Remote Emergency Stop
Run Relay
Electrical System
Alternator Strip Heater
Battery
Battery Charger, Equalize/Float Type
Battery Heater
Line Circuit Breaker (NEMA1 enclosure)
Line Circuit Breaker with Shunt Trip (NEMA1 enclosure)
Warranty
- 2-Year Basic
- 5-Year Basic
- 5-Year Comprehensive
Other Options
_______________________________________________
_______________________________________________
_______________________________________________
_______________________________________________
_______________________________________________
_______________________________________________
_______________________________________________
_______________________________________________
Dimensions and Weights
Overall Size, L x W x H, mm (in.) :
3526 x 1153 x 1724
(139 x 45.4 x 67.9)
Weight, wet, kg (lb.):
With steel sound enclosure
With aluminum sound enclosure
Cooling System
- Block Heater, 1800 W, 110--120 V
- Block Heater, 2000 W, 190--240 V
[recommended for ambient temperatures below 10C (50F)]
-
Literature
- General Maintenance
- Overhaul
- Production
-
Enclosure
- Aluminum Sound Enclosure
-
Miscellaneous
- Air Cleaner Restrictor Indicator
- Crankcase Ventilation (CCV) Heater
[recommended for ambient temperatures below 0C (32F)]
- Engine Fluids Added
- Rated Power Factor Testing
- Rodent Guards
1758 (3876)
1592 (3509)
Weight includes generator set with the 4R or 4T alternator, engine fluids,
sound enclosure, and silencer.
H
W
L
NOTE: This drawing is provided for reference only and should not be
used for planning installation. Contact your local distributor for more
detailed information.
DISTRIBUTED BY:
 2012, 2013 by Kohler Co. All rights reserved.
G4-223 (125ERESC) 10/13d
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