Page 93 - E24 Electrical Notebook

Cummins Power Generation - Generator Systems - 89

Digital Paralleling Systems & Switchgear

PowerCommand® Digital Master Controllers are designed and manufactured around standardised control blocks - delivering increased reliability, flexibility
and performance. Digital Master Controllers (DMC) provides seamless interface between the generator(s), PowerCommand® Controller (PCC), the site
switchgear and distribution systems. Furthermore, the DMC is a fully automatic controller suitable for unattended applications. DMCs are configurable
for use in many power systems architectures, including isolated bus paralleling and infinite bus (utility) applications.

Automatic Transfer Switches

PowerCommand® automatic transfer switches optimise performance and simplify operation and service. Transfer switches provide all necessary supply
sensing, generator starting and supply transfer functionality in one convenient unit.

PowerCommand® Digital Master Controllers Automatic Transfer Switches

DMC1000 DMC1500 DMC200 DMC300
Isolated Infinite Isolated Infinite
Feature Isolated Infinite Feature GTEC
Bus Bus Bus Bus
Custom engineering required Bus Bus –– ◊ ◊ Specification Light
Genset Controller Compatibility Duty 40-2000
PowerCommand 3100, 3200, 3301 & 3300 –– ●● ● ● Amp Range Up to 480 VAC
System Start Voltage Rating
Common system start directly to gens (bypasses PLC or MCM) ●● –– ◊ ◊ Phases 1 or 3
Common system start to genset based on DMC monitoring ●● ◊ ◊ Frequency 50 or 60 Hz
Enable / Disable automatic start signal when system is in manual ●● ●● – – Poles
Manual start & breaker open / close control of individual gensets from HMI –● ◊◊ ● ● Warranty 2, 3, 4
Genset Paralleling –– Operating temperature Range (C) 1 year
Parallel up to 4 gensets –– ●● ● ● Switch Mechanism -30 to 60°C
Parallel up to 8 gensets ◊◊ ● ● Open Transition
Parallel more than 8 gensets (requires custom touchscreen development) ●● –– ◊ ◊ Programmed Transition ●
Load Demand –– Utility-to-Genset ●
Fixed Sequence, non-PCC3300 –– ●– ◊ ◊ Genset-to-Genset ●
Run Hour Sequence, non-PCC3300 ●– ● ◊ WCR with Specified Circuit Breaker ●
Fixed Sequence, PCC3300 ●– ●● ● ◊ WCR with Current Limiting Fuses 25 – 65 kA
Run Hour Sequence, PCC3300 ●– ●● ◊ ◊ Control 25 – 65 kA
Multiple Load Busses ●– –– ◊ ◊ Type of Control
Load Add / Shed ●– Operator Panel Basic Micro
Priority Based – 6 Levels/6 Loads –– ◊◊ ◊ ◊ Load Connected to Normal LED
Priority Based – 8 Levels/8 Loads –– ● ● Normal Source Available LED ●
Priority Based – 10 Levels/10 Loads ◊◊ ◊◊ ◊ ◊ Load Connected to Emergency LED ●
Priority Based – 16 Levels/32 Loads –– –– ◊ ◊ Emergency Source Available LED ●
Capacity Based – single bus / Priority Based – multiple bus –– –– ◊ ◊ Control Functions ●
Manual Load Add / Shed control –– –– ● ● 3-phase Voltage Sensing – Utility
System Test & System Scheduler (Exercise) –– 3-phase Voltage Sensing – Generator ●
System Test – Without load / With Load –– ●● ● ● Electrical Isolation from AC – Mains Single Phase
Test ●● ◊ ◊ O/U Voltage Sensing Utility High Impedance
Extended Parallel ●● –● ◊ ◊ O/U Voltage Sensing Generator
Extended Utility Paralleling kW Control ●● Voltage Sensing Accuracy U/V Only
Genset Bus % Level (Open Loop / Base Load) –● –● – ● O/U Frequency Sensing Utility U/V Only
Genset kW (Open Loop / Base Load) –– – ● O/U Frequency Sensing Generator
Individual Genset kW (Open Loop / Base Load) –● –– – ◊ Voltage Imbalance +/-2%
Genset Bus kW (Closed Loop) –– –● – ◊ Phase Rotation –
Genset Bus kW with Utility Constraint (Closed Loop / Base Load with export limit) –– –● – ◊ Loss of Phase
Utility Bus kW (Closed Loop / Peak Shave) –● –● – ◊ Transfer Normal to Emergency (time) U/F Only
Extended Utility Paralleling kVAR Control –● Re-transfer Emergency to Normal (time) –
Gen Bus % Level (Open Loop) –● –● – ◊ Engine Start Delay (adjustable) –
Genset Bus Power Factor (Open Loop) –● – ◊ Time Delay to Engine Stop –
Genset Bus kVAR (Closed Loop) –● –● – ◊ Programmed Transition (time)
Genset Bus Power Factor (Closed Loop) –● –● – ◊ Fail to Disconnect Timer (closed transition) 0 – 300 secs
Utility Bus kVAR (Closed Loop) –● –● – ◊ Time & Date – Stamped Event Log 0 – 30 mins
Utility Bus Power Factor (Closed Loop) –● –● – ◊ Historical Data Display 0 – 10 secs
Extended Paralleling Control –● Remote Monitoring / Communication 0 – 30 mins
Auto Peak Shave or Base Load –● –● – ◊ System Data Display 0 – 10 secs
Power Transfer Transitions Elevator Signal Module
Open Transition –● –● ● ● Load Sequencing –
Hard Closed Transition < 100ms – ◊* – ◊* Fully Programmable Exerciser Clock –
Hard Closed Transition non-ramping –● –● – ● Exercise Clock –
Soft Closed Transition – ◊* –● – ● Real-Time Clock –
NE Function –● –
Neutral Earth Device Control –● ◊◊ ◊ ◊ ◊
Data Communication, Display & Alarming –
Web Serving HMI Screens –– ◊ ◊ ◊
Genset Summary data at the DMC ◊◊ ● ● ●
Real Time Trending ●● ● ● –
Historical Trending ●● ◊ ◊
Modbus RTU RS485 BMS Interface –– ◊◊ ◊ ◊ ● Standard
Modbus RTU RS232 ◊◊ ◊ ◊ ◊ Optional
Modbus TCP/IP over Ethernet BMS Interface –– ◊◊ ◊ ◊ – Not Available
Remote Monitoring Station for on-site / off-site power systems –– –– ◊ ◊
Supervisory Monitoring Station for onsite / offsite power systems –– –– ◊ ◊ All Units are CE Certified
System Annunciator (s) –– –– ◊ ◊
Audible Alarm ●● ●● ● ● Visit Cummins Power Suite:
Diagnostics –– ●● ● ● Powersuite.cummins.com
Operator Interface ––
HMI 211 Operator Interface –– –– – –
15” Colour Touch Screen –– ●● ● ●
19” / 42” Colour Touch Screen –– –– ◊ ◊
Redundant CPU ●●
Hot Standby Redundant CPU and Cabling ●● –– ◊ ◊
Reports – Alarm History ●● ● ●
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* Only with Cummins supplied Switchgear

Cummins Distribution Europe Tel : 08705 32 92 02

40-44 Rutherford Drive Fax : 01933 33 43 43

Park Farm Industrial Estate

Wellingborough Email : cduksales@cummins.com

Northants NN8 6AN Website : www.cumminseurope.com