PowerSuite_17-Mar-2025_All_Report[Grey Rd].pdf
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- Attached to
- Sanitary Lift Stations Generator Install
- Solicitation number
- RFP-03-07-2025-001
- Issued by
- Berrien County, Ann Arbor City, Michigan
About this file
This document is a Recommended Generator Report for a Cummins Power Generation C60 N6 Project located at Grey Road, involving a standby generator installation for a sanitary lift station. The report details a generator set with a 60 Hz frequency, 120/240V Series Delta voltage, three-phase configuration, and natural gas fuel source, rated for EPA stationary emergency application. The generator has a running capacity of 36.1 kW and 40.5 kVA, with a maximum step capacity of 56.4 kW and 120.4 kVA, designed to operate at 60% rated capacity. The project includes two motor loads and miscellaneous loads, with each step carefully analyzed for voltage and frequency performance.
The generator set is a Cummins model with a QSJ5.9G-G2 engine, configured with a UC2F alternator and shunt excitation. The site is located at 361 feet altitude with a site temperature of 25°C, and the generator meets EPA emissions standards. The report provides detailed step-by-step analysis of load requirements, including voltage and frequency dip limits, with both steps showing performance within acceptable ranges. The voltage dip is 28% in step 1 and 27% in step 2, well within the 35% limit, and frequency dip is 6% and 5% respectively, under the 10% limit, indicating a stable and reliable power generation solution for the sanitary lift station.
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Recommended Generator Report 17-Mar-2025 Page 1
Recommended Generator Report - C60
N6 Project - Grey Rd Comments -
Project Requirements
Frequency, Hz : 60.0 Generators Running in Parallel : 1
Duty : Standby Site Altitude, ft(m) : 361(152)
Voltage : 120/240, Series Delta Site Temperature, °C : 25
Phase : 3 Max. Altr Temp Rise, °C : 125
Fuel : NaturalGas Project Voltage Distortion Limit, % :
Emissions : EPA, stationary emergency application
Calculated Individual Generator Set Load Running and Peak Requirements
Running kW : 36.1 Max. Step kW : 56.4 In Step 1 Cumulative Step kW : 73.4
Running kVA : 40.5 Max. Step kVA : 120.4 In Step 1 Cumulative Step kVA : 139.4
Running PF : 0.89 Peak kW : None Cumulative Peak kW : None
Running NLL kVA : 0.0 Peak kVA : None Cumulative Peak kVA : None
Alternator kW : 36.06 Pct Rated Capacity : 60.0
Generator Set Configuration
Alternator : UC2F Engine : QSJ5.9G-G2
BCode : B986 Fuel : NaturalGas
Excitation : Shunt Displacement, cu in. (Litre) : 359.0(5.9)
Voltage Range : 220/440-240/480 Cylinders : 6
Number of Leads : 6 Altitude Knee, ft(m) : 3300(1006)
Reconnectable : Yes Altitude Slope, % per 1000ft(304.8m) : 4
Full Single Phase Output : No Temperature Knee, °F(°C) : 104(40)
Increased Motor Starting : No Temperature Slope, % per 18°F(10.0°C) : 2
Extended Stack : No Emissions : EPA NSPS Part 60
Cooling Package :
Set Performance Load Requirements
Running At : 60.0% Rated Capacity
Max. Step Voltage Dip, % : 28 Max. Allowed Step Voltage Dip : 35 In Step 1
Max. Step Frequency Dip, % : 6 Max. Allowed Step Frequency Dip : 10 In Step 1
Peak Voltage Dip, % : Peak Voltage Dip Limit % : 35.0
Peak Frequency Dip, % : Peak Frequency Dip Limit % : 10
Site Rated Standby kW/kVA : 60 / 75 Running kW : 36.1
Running kVA : 40.5
Site Rated Max. SkW : 61 Effective Step kW : 59.4
Max. SkVA : 231 Effective Step kVA : 132.6
Temp Rise at Full Load, °C : 120 Percent Non-Linear Load : 0.0
Voltage Distortion : Voltage Distortion Limit :
Site Rated Max Step kW Limit : Max Step kW :
*Note: Higher temperature rise at full rated load.
*Note: All generator set power derates are based on open generator sets.
Note: GenSize output for lean burn natural gas generator sets is based on tests using natural gas with LHV of 33.44 mJ/Nm3 (905 BTU/ft3). and coolant return temperatures within the stated data sheet limits. For operation on gas with lower heating values or with MI lower than stated Data Sheet limit or coolant return temperatures greater than Data Sheet limits, consult application engineering.
Loads and Steps Detail Report 17-Mar-2025 Page 1
Loads Summary Report
Project - Grey Rd
Comments -
Loads Summary List
*Note: Detailed Loads and Step Report available below
*Note: Detailed Loads and Step Report available below
Project Requirements
Frequency, Hz : 60.0 Generators Running in Parallel : 1
Duty : Standby Site Altitude, ft(m) : 361(152)
Voltage : 120/240, Series Delta Site Temperature, °C : 25
Phase : 3 Max. Altr Temp Rise, °C : 125
Fuel : NaturalGas Project Voltage Distortion Limit, % :
Emissions : EPA, stationary emergency application
Step No. Load Name Quantity Running kW kVA
Starting kW kVA
Peak kW kVA
Dip Limits, %
Vdip Fdip
VTHD%
Limit
Step01 Motor Load 1 1 16.95 19.04 54.28 118.0 None None 35.0 10.0 0.0
Step01 Misc Loads 1 2.16 2.4 2.16 2.4 None None 35.0 10.0 0.0
Step Summary 19.0 21.0 56.0 120.0 None None 35.0 10.0 0.0
Step02 Motor Load 2 1 16.95 19.04 54.28 118.0 None None 35.0 10.0 0.0
Step Summary 17.0 19.0 54.0 118.0 None None 35.0 10.0 0.0
Project Summary
Running kW kVA
Max Starting kW kVA
Cumulative Step kW kVA
Cumulative Peak kW kVA
Project
VTHD%
Limit
36.1 40.5 56.4 120.4 73.4 139.4 0.0 0.0 0.0
Loads and Steps Detail Report 17-Mar-2025 Page 2
Loads and Steps Detail
Report Project - Grey Rd
Comments -
Project Requirements
Frequency, Hz : 60.0 Generators Running in Parallel : 1
Duty : Standby Site Altitude, ft(m) : 361(152)
Voltage : 120/240, Series Delta Site Temperature, °C : 25
Phase : 3 Max. Altr Temp Rise, °C : 125
Fuel : NaturalGas Project Voltage Distortion Limit, % :
Emissions : EPA, stationary emergency application
Calculated Individual Generator Set Load Running and Peak Requirements
Running kW : 36.1 Max. Step kW : 56.4 In Step 1 Cumulative Step kW : 73.4
Running kVA : 40.5 Max. Step kVA : 120.4 In Step 1 Cumulative Step kVA : 139.4
Running PF : 0.89 Peak kW : None Cumulative Peak kW : None
Running NLL kVA : None Peak kVA : None Cumulative Peak kVA : None
Alternator kW : 36.06
Step1
Calculated Individual Generator Set Step Load Requirements
Running kW : 19.0 Starting kW : 56.0 Cumulative Step kW : 56.0
Running kVA : 21.0 Starting kVA : 120.0 Cumulative Step kVA : 120.0
Running Amps : 52.0 Starting Non-linear kVA : 0.0
Running Non-linear kVA : 0.0
Alternator kW : 19.11
Voltage Distortion Limit for step
: 0
Motor Load 1 Three Phase Quantity : 1 In this Step
Category : Motor
Running kW : 16.95 Starting kW : 54.28 Peak kW : None
Running kVA : 19.04 Starting kVA : 118.0 Peak kVA : None
Running PF : 0.89 Starting PF : 0.46 Cyclic : No
Running Amps : 45.86 Max. % Voltage Dip : 35.0 Max. % Frequency Dip : 10.0
Alternator kW : 16.95 Voltage : 240
Shaft Hp : 20.0 Method : Across the line
Shaft kW : 14.92 Low Inertia : No
Efficiency (%) : 0.88 LRkVA Factor : 5.9
Design : Standard NEMA Design B,C or D LRkVA Code : G
Load Factor : 100.0
Loads and Steps Detail Report 17-Mar-2025 Page 3
Misc Loads Single Phase Quantity : 1 In this Step
Category : General Receptacle
Running kW : 2.16 Starting kW : 2.16 Peak kW : None
Running kVA : 2.4 Starting kVA : 2.4 Peak kVA : None
Running PF : 0.9 Starting PF : 0.9 Cyclic : No
Running Amps : 20.0 Max. % Voltage Dip : 35.0 Max. % Frequency Dip : 10.0
Alternator kW : 2.16 Voltage : 120
Step2
Calculated Individual Generator Set Step Load Requirements
Running kW : 17.0 Starting kW : 54.0 Cumulative Step kW : 73.0
Running kVA : 19.0 Starting kVA : 118.0 Cumulative Step kVA : 139.0
Running Amps : 46.0 Starting Non-linear kVA : 0.0
Running Non-linear kVA : 0.0
Alternator kW : 16.95
Voltage Distortion Limit for step
: 0
Motor Load 2 Three Phase Quantity : 1 In this Step
Category : Motor
Running kW : 16.95 Starting kW : 54.28 Peak kW : None
Running kVA : 19.04 Starting kVA : 118.0 Peak kVA : None
Running PF : 0.89 Starting PF : 0.46 Cyclic : No
Running Amps : 45.86 Max. % Voltage Dip : 35.0 Max. % Frequency Dip : 10.0
Alternator kW : 16.95 Voltage : 240
Shaft Hp : 20.0 Method : Across the line
Shaft kW : 14.92 Low Inertia : No
Efficiency (%) : 0.88 LRkVA Factor : 5.9
Design : Standard NEMA Design B,C or D LRkVA Code : G
Load Factor : 100.0
Steps and Dips Detail Report 17-Mar-2025 Page 1
Steps and Dips Details
Report Project - Grey Rd
Project Requirements
Frequency, Hz : 60.0 Generators Running in Parallel : 1
Duty : Standby Site Altitude, ft(m) : 361(152)
Voltage : 120/240, Series Delta Site Temperature, °C : 25
Phase : 3 Max. Altr Temp Rise, °C : 125
Fuel : NaturalGas Project Voltage Distortion Limit, % :
Emissions : EPA, stationary emergency application
Calculated Individual Generator Set Load Running and Peak Requirements
Running kW : 36.1 Max. Step kW : 56.4 In Step 1 Cumulative Step kW : 73.4
Running kVA : 40.5 Max. Step kVA : 120.4 In Step 1 Cumulative Step kVA : 139.4
Running PF : 0.89 Peak kW : None Cumulative Peak kW : None
Running NLL kVA : 0.0 Peak kVA : None Cumulative Peak kVA : None
Alternator kW : 36.06
Generator Set Configuration
Model : C60 N6 Alternator : UC2F
Engine Model : QSJ5.9G-G2 Excitation : Shunt
Fuel : NaturalGas
Step Level Dips Summary
Step # Voltage Dip Limit (%)
Expected Step Voltage
Dip (%)
Voltage Recovery Time
(s) **
Frequency Dip Limit
Expected Frequency
Dip (%)
Frequency recovery
Time (s) **
1 35 28 3.1 10 6 1.9
2 35 27 3.0 10 5 1.8 Note: Please refer to the model Spec. sheet for bandwidths used to report recovery times. For products manufactured in the United Kingdom it may be assumed that recovery times are based on ISO8528-5 G2 class bandwidths. Voltage and frequency recovery times are estimates. Typically, allow five to ten seconds between application of load steps when designing your system.
**Please note that in some cases the voltage and frequency recovery time estimates are not shown in list. This is a result of "dummy" data points temporarily being used to fill data gaps in the GenSize database. Please disregard these blank results.
Steps and Dips Detail Report 17-Mar-2025 Page 2
VDip Actual VDip Limit
0 . 0 2 . 5 5 . 0 7 . 5 1 0 . 0 1 2 . 5 1 5 . 0 1 7 . 5 2 0 . 0 2 2 . 5 2 5 . 0 2 7 . 5 3 0 . 0 3 2 . 5 3 5 . 0
Va lue
Step 1
Step 2S te p # 2 8 . 0
2 7 . 0
3 5 . 0
3 5 . 0
FDip Actual FDip Limit
0 1 2 3 4 5 6 7 8 9 1 0
Value
Step 1
Step 2S te p # 6 . 0
5 . 0
1 0 . 0
1 0 . 0
File details come from the government source that posted it. Updated .