PowerSuite_17-Mar-2025_All_Report[Lake Angelus Rd].pdf
PDF 220 KB Posted
- 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
The document is a Recommended Generator Report for the Lake Angelus project, prepared by Cummins Power Generation on 17-Mar-2025. The report details specifications for a standby generator system for a sanitary lift stations generator installation in Michigan. The generator is a C125 N6 model with a natural gas fuel system, designed for emergency stationary applications, operating at 277/480 volts, three-phase, with a 60 Hz frequency. The project site is located at an altitude of 361 feet, with an ambient temperature of 25°C, and requires EPA-compliant emissions standards.
The generator set provides 59.2 kW of running power and can handle maximum step loads of 84.4 kW, with a peak starting kVA of 203.0. The system includes two motor loads (each 28.5 kW) and miscellaneous loads (2.16 kW), configured to run in a standby duty cycle. The generator uses a QSJ8.9G-G2 engine with a UC3E alternator, featuring shunt excitation and capable of operating across the line. The report provides detailed load steps, voltage and frequency dip analyses, and performance characteristics, indicating the generator is sized appropriately for the lift station's power requirements with built-in redundancy and compliance with electrical performance standards.
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Recommended Generator Report 17-Mar-2025 Page 1
Recommended Generator Report - C125 N6
Project - Lake Angelus Comments -
Project Requirements
Frequency, Hz : 60.0 Generators Running in Parallel : 1
Duty : Standby Site Altitude, ft(m) : 361(152)
Voltage : 277/480, Series Wye 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 : 59.2 Max. Step kW : 84.4 In Step 1 Cumulative Step kW : 112.9
Running kVA : 65.7 Max. Step kVA : 203.0 In Step 1 Cumulative Step kVA : 234.7
Running PF : 0.9 Peak kW : None Cumulative Peak kW : None
Running NLL kVA : 0.0 Peak kVA : None Cumulative Peak kVA : None
Alternator kW : 59.16 Pct Rated Capacity : 47.2
Generator Set Configuration
Alternator : UC3E Engine : QSJ8.9G-G2
BCode : B943 Fuel : NaturalGas
Excitation : Shunt Displacement, cu in. (Litre) : 543.0(8.9)
Voltage Range : 220/440-240/480 Cylinders : 6
Number of Leads : 6 Altitude Knee, ft(m) : 5900(1798)
Reconnectable : Yes Altitude Slope, % per 985ft(300.2m) : 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 : 47.2% Rated Capacity
Max. Step Voltage Dip, % : 16 Max. Allowed Step Voltage Dip : 35 In Step 1
Max. Step Frequency Dip, % : 8 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 : 125 / 156 Running kW : 59.2
Running kVA : 65.7
Site Rated Max. SkW : 131 Effective Step kW : 93.6
Max. SkVA : 422 Effective Step kVA : 228.4
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 - Lake Angelus 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 : 277/480, Series Wye 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 28.5 31.67 82.25 200.6 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 31.0 34.0 84.0 203.0 None None 35.0 10.0 0.0
Step02 Motor Load 2 1 28.5 31.67 82.25 200.6 None None 35.0 10.0 0.0
Step Summary 29.0 32.0 82.0 201.0 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
59.2 65.7 84.4 203.0 112.9 234.7 0.0 0.0 0.0
Loads and Steps Detail Report 17-Mar-2025 Page 2
Loads and Steps Detail
Report Project - Lake Angelus
Comments -
Project Requirements
Frequency, Hz : 60.0 Generators Running in Parallel : 1
Duty : Standby Site Altitude, ft(m) : 361(152)
Voltage : 277/480, Series Wye 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 : 59.2 Max. Step kW : 84.4 In Step 1 Cumulative Step kW : 112.9
Running kVA : 65.7 Max. Step kVA : 203.0 In Step 1 Cumulative Step kVA : 234.7
Running PF : 0.9 Peak kW : None Cumulative Peak kW : None
Running NLL kVA : None Peak kVA : None Cumulative Peak kVA : None
Alternator kW : 59.16
Step1
Calculated Individual Generator Set Step Load Requirements
Running kW : 31.0 Starting kW : 84.0 Cumulative Step kW : 84.0
Running kVA : 34.0 Starting kVA : 203.0 Cumulative Step kVA : 203.0
Running Amps : 41.0 Starting Non-linear kVA : 0.0
Running Non-linear kVA : 0.0
Alternator kW : 30.66
Voltage Distortion Limit for step
: 0
Motor Load 1 Three Phase Quantity : 1 In this Step
Category : Motor
Running kW : 28.5 Starting kW : 82.25 Peak kW : None
Running kVA : 31.67 Starting kVA : 200.6 Peak kVA : None
Running PF : 0.9 Starting PF : 0.41 Cyclic : No
Running Amps : 38.14 Max. % Voltage Dip : 35.0 Max. % Frequency Dip : 10.0
Alternator kW : 28.5 Voltage : 480
Shaft Hp : 34.0 Method : Across the line
Shaft kW : 25.36 Low Inertia : No
Efficiency (%) : 0.89 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 : 29.0 Starting kW : 82.0 Cumulative Step kW : 113.0
Running kVA : 32.0 Starting kVA : 201.0 Cumulative Step kVA : 235.0
Running Amps : 38.0 Starting Non-linear kVA : 0.0
Running Non-linear kVA : 0.0
Alternator kW : 28.5
Voltage Distortion Limit for step
: 0
Motor Load 2 Three Phase Quantity : 1 In this Step
Category : Motor
Running kW : 28.5 Starting kW : 82.25 Peak kW : None
Running kVA : 31.67 Starting kVA : 200.6 Peak kVA : None
Running PF : 0.9 Starting PF : 0.41 Cyclic : No
Running Amps : 38.14 Max. % Voltage Dip : 35.0 Max. % Frequency Dip : 10.0
Alternator kW : 28.5 Voltage : 480
Shaft Hp : 34.0 Method : Across the line
Shaft kW : 25.36 Low Inertia : No
Efficiency (%) : 0.89 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 - Lake Angelus
Project Requirements
Frequency, Hz : 60.0 Generators Running in Parallel : 1
Duty : Standby Site Altitude, ft(m) : 361(152)
Voltage : 277/480, Series Wye 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 : 59.2 Max. Step kW : 84.4 In Step 1 Cumulative Step kW : 112.9
Running kVA : 65.7 Max. Step kVA : 203.0 In Step 1 Cumulative Step kVA : 234.7
Running PF : 0.9 Peak kW : None Cumulative Peak kW : None
Running NLL kVA : 0.0 Peak kVA : None Cumulative Peak kVA : None
Alternator kW : 59.16
Generator Set Configuration
Model : C125 N6 Alternator : UC3E
Engine Model : QSJ8.9G-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 16 1.6 10 8 2.5
2 35 16 1.5 10 8 2.5 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 # 1 6 . 0
1 6 . 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 # 8 . 0
8 . 0
1 0 . 0
1 0 . 0
File details come from the government source that posted it. Updated .