Paralleling Switchgear PSG GE Zenith Capabilities Overview GE

Paralleling Switchgear (PSG) GE Zenith Capabilities - Overview

GE Zenith Controls – Paralleling Switchgear (PSG) • First system built in 1975 • Currently ~ 150 systems/year • Currently building project #1280 2 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training

What is a Paralleling Switchgear System (PSG) ? Controls and switchgear, acting as a system, to manage & distribute emergency power and/or reduce energy costs thru intelligent use of local generation Genset #1 Genset #2 Genset #3 Utility Breaker Service Entrance Breaker Primary Source (Normally Energized) Normal System (Normally Energized) Paralleling Breaker Paralleling Bus Distribution Breakers (Normally Deenergized) ATS Exit 3 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Emergency System Critical Loads

Key Benefits of PSG? • Increased Backup Power Supply Capacity – When backup supply needs are > capacity 1 Gen • Backup Supply Redundancy – Provides “N + 1, 2, etc” redundancy. Critical loads not reliant on only 1 Genset • Operational Flexibility – Ability to switch loads between multiple sources (including Gensets) for maintenance & test without interrupting power to the loads • Reduced Energy Bills – Turn on-site generation capability into an moneysaving Asset, with start/stop/loading intelligence for reduced energy & demand charges. 4 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training

Typical Systems built by GE Zenith Controls • Single Genset – Single Utility Soft Load Transfer Switch For small facility standby & distributed generation • Multiple-Genset Standby 5 For Life Safety or Business Critical standby power to selected high-priority loads. • Utility Paralleling, Peak Shaving Paralleling of Generator(s) and Utility supplies for backup of entire facility and reduced energy charges. • Mission Critical Standby Turning on-site generation capability into an Asset, with start/stop/loading intelligence for reduced energy & demand charges. GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training

Examples of Typical GE Zenith Systems

Type 1 – Single Gen, Single Utility Soft Load Transfer Switch

Soft Load Transfer Switch Single Gen, Single Utility Architecture Utility Supply Building Dist. System Speed Control Generator Engine Gen Supply Breaker GCB (N/O) Utility Supply Breaker MCB (N/C) Standby Generator Building Load 8 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training

Sequences of Operation – Softload Transfer Switch Mode: GCB Genset/Backup Supply Critical Load MCB Gen Status: Normal OFF Energized. k. W Varies. k. W = Facility Load Standby Running. k. W Varies. k. W = Facility Load Failed/Off. Running. Soft Re-Transfer Initial k. W = Facility Load To Utility Running. Initial k. W= 0 k. W Utility/Primary Supply k. W GCB MCB Final k. W= ~10% Rated 9 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Utility Status: Final k. W= Facility Load

Baseload Setpoint Time GCB k. W Level Sequences of Operation – Softload Transfer Switch Mode: Time MCB k. W Running. k. W Fixed. k. W = Preset/ Fixed (typically 80 -100% Genset Capacity) Energized. k. W Varies. k. W = Facility Load in excess Of Fixed Gen k. W Import (Export) Mode Running. k. W Varies. k. W = Facility Load in excess Of Import Setpoint Energized. k. W Fixed. k. W = Fixed Import or Export Level (k. W) k. W Level Time GCB k. W Level k. W 10 Time GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Time MCB k. W Utility Status: Base Load Mode k. W Import Setpoint Gen Status:

Control Panel – Softload Transfer Switch LAN/ WAN Generator & Utility Protection via: GE Multilin G 30 ™ Peak Shaving Control via: Woodward GCP-32 ™ Peak Shaving Controller communications via: Local Monitoring and email Alarm transmission via: Enervista Viewpoint Monitoring ™ Woodward GW 4 ™ (Modbus) Plus: Manual Control Switches Safety Lockout/86 Relay LED Status Annunciation 11 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training

Site Level: Peak Shave System Metering Meter #1: Utility Meter (UM) : Utility Supply k. W, Energy, etc. Meter #2: Generator Meter (GM) : Generator Supply k. W, Energy, etc. Virtual Meter #1: Load Meter (LM = GM + UM) {Developed in GE Aggregator ™} Peak Shaving Savings = (LM * Rate Structure) – (UM * Rate Structure) GE Multilin G 30 Relay Meter #1: Generator Source Metering (GM) Meter #2: Utility Source Metering (UM) V (PT’S) 3 CT’s 3 CT’S V (PT’S) Closed Transition ATS or 5 -cycle CB’s Engine Generator GCB MCB Genset Supply Critical Load 12 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Utility Supply

Peak Shave Savings Reports – GE Aggregator™ 1 Setup Utility billing structure Export reports for printing, sending, or filing 2 Setup custom site bills (showing usage or savings) 4 3 13 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Enter Begin & End dates & create/ view bills

Local & Remote Access to Reports LEVEL 4: Enterprise Energy Aggregator™ Viewers (Up to 5 concurrent users) Web Serv er View reports from EEA. “Aggregates”, or combines date from the (6) REA servers. Up to ~ 100 Sites per Aggregator … Upload Data-Logs Est. (6) REA’s for full 630 -site configuration LEVEL 3: Enterprise Energy Aggregator™ (EEA) (Qty. 1) LEVEL 2: Regional Energy Aggregator™ (REA) (1 Server/~100 Sites) LAN or VPN Local data-logging by Multilin G 30’s Site Level Site Peak Shaving Control Systems w/ local GE Enervista Viewpoint™ Unlimited # Sites GE Zenith ZTSSL 14 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training GE Zenith ZTSSL

GE Zenith Design Recommendations • True PQ Metering of Both Sources, including Waveform and Events Capture – for quick diagnosis of system events and outages • Utility grade protective relaying for equipment and personnel safety - – due to extended nature of utility paralleling. • Open protocol Modbus communications for easy facility integration • Plug-and-Play PC Monitoring for low cost, but effective system monitoring and alarm management, including automatic email generation of any/all alarm events • Key-lockable Control Switches for safety 15 • Automatic report generation for: Utility and Generator Energy supply (k. WH), Demand (k. W), and Peak Shave savings (based on GE Zenith Controls – Power Quality site-specific utility rate structure). Automatic Transfer Switch Product Training

Type 2 – Multiple Genset Standby

Multiple Genset Standby Typical Architecture Genset #1 Genset #2 Primary Distribution Genset #3 Paralleling Bus Secondary Distribution ATS 17 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training Emergency Panelboard Emergency Loads Exit

Typical Sequence of Operation for PSG – On loss of Utility X Genset #2 Genset #1 Synchronous Conditions 1) Volts within +/- 10% 1 Paralleling Bus 2) Phase within +/- 20 Deg 1 2 ATS 1 Utility Supply Fails 2 ATS Send start signal to all Gens 3 All Gens start. PSG control system monitors. 1 st Gen at rated Volts & Freq is connected to the Paralleling Bus. Priority 1 ATS Xfer to Gens. PSG inhibits xfer of lower priority ATS to prevent Gen overload. 4 18 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training 5 6 7 8 PSG Controls synchronize 2 nd and 3 rd Gensets to Bus (speed and volts bias to Gen Gov & AVR), and close CB’s at point of synchonism (see above). PSG Controls remove xfer inhibits on lower priority ATS to permit connection to Gen system. PSG Controls shed low priority ATS if Gens are overloaded. PSG permits manual or auto reconnect. PSG Controls shed low priority ATS if Gens are overloaded. PSG permits manual or auto re-connect.

Typical Sequence of Operation for PSG – On Return of Utility Genset #2 Genset #1 Paralleling Bus ATS 1 Utility Supply Returns 4 2 ATS’s retransfer loads to Utility, after preset time delays, and remote start commands. PSG controls hold start signal to all Gens to permit cooldown at no load. 5 After cooldown timer expires, PSG controls remove start signals to Gensets. 3 When last ATS removes start command, PSG Controls open all Gen CB’s 6 Gensets shut down and remain ready for next utility outage. 19 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training

Typical GE Zenith Configuration Other key items (inside) Key Items – GE Recommendation 1. GE Fanuc PLC (Single or Redundant) 2. Flexible Woodward SPMA (sync) and LSM (load Sharing) modules 3. Hardwired backup switches for load add/shed 4. Backup 24 VDC power supply for system ride-thru on DC control power problems • Highly visible, LED Annunciation for instant viewing and viewing from distance • Full manual paralleling control switches (Auto/Manual, Sync Switch, CB Open/close, Synchroscope/V/Hz meters on swing panel) • Generator Analog Metering for best viewing of Gen & Utility stability • Generator Protective Relay (typically grade for MV, Industrialcapability grade for Totalizing Power Quality Meter (PQM)Utility with waveform & diagnostic • LV) Simple Operator Interface Panel (OIP) for setup of time delays, load add/shed, etc. 20 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training

Type 3 – Utility Paralleling, Peak Shaving

Utility Paralleling, Peak Shaving Typical Architecture Utility Supply Genset Breakers Main Bus Feeder Breakers Facility Loads 22 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training 1. Generators sized to high% of total facility loads 2. Utility CB and Gen CB’s act as a “Transfer Switch”, switching 2 sources of power to main bus in event of Utility outage. 3. Re-transfer to utility either Open or Closed Transition (typically closed) 4. Main bus is fed from 2 sources power – utility supply (primary) and generator supply (backup) 5. Bus AIC/Short circuit rating sized to capacity of

Genset Base Load: Utility k. W Level Gen k. W Level Utility Paralleling - Base Loading Baseload Setpoint Time Utility Supply 1 Utility Supply Available 2 When pre-programmed conditions for Genset starting satisfied (Utility load >x, time of day, etc) PSG Controls start Gensets, synchonize to utility supply, and close Gen CB’s. 3 PSG system controls k. W on Gensets to fixed, base load level. 4 As system load varies, Utility supply k. W varies to supply the load. 5 When Gen supply no longer needed, PSG Controls slowly ramp load back to utility supply and open Gen CB; s at near no-load. 5 PSG controls cooldown and shutdown Gensets. k. W Time GCB k. W GCB Load k. W Level k. W 23 k. W Time GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training k. W

Utility k. W Level Utility Paralleling - Import/Export Baseload Setpoint Gen k. W Level Time MCB Utility Import/Export: 1 Utility Supply Available 2 When pre-programmed conditions for Genset starting satisfied (Utility load >x, time of day, etc) PSG Controls start Gensets, synchonize to utility supply, and close Gen CB’s. 3 PSG system controls k. W on Gensets to maintain fixed k. W value on Utility supply (import or export). 4 As system load varies, Genset supply k. W varies to supply the load. 5 When Gen supply no longer needed, PSG Controls slowly ramp load back to utility supply and open Gen CB; s at near no-load. 5 PSG controls cooldown and shutdown Gensets. k. W Time GCB k. W GCB Load k. W Level k. W 24 k. W Time GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training

Typical GE Zenith Configuration Other key items (inside) Key Items – GE Recommendation 25 1. GE Fanuc PLC (Single or Redundant) 2. Flexible Woodward SPMA (sync) and LSM (load Sharing) modules 3. Hardwired backup switches for load add/shed 4. Backup 24 VDC power supply for system ride-thru on DC control power problems • Highly visible, LED Annunciation for instant viewing and viewing from distance • Full manual paralleling control switches (Auto/Manual, Sync Switch, CB Open/close, Synchroscope/V/Hz meters on swing panel) • Full, Open transition, manual control of Utility CB • Generator Analog Metering for best viewing of Gen & Utility stability • Generator Protective Relay (Utility grade) Totalizing Power Quality Meter (PQM) with waveform & diagnostic capability • Industrial Computer with graphical 1 -lines, load controls, trending, alarm management. GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training

Type 4 – Mission Critical Standby

Mission Critical Standby Typical Architecture – Tier 4 Data Center System ‘A’ Gen Bus System ‘B’ Gen Bus System ‘A’ Utility Bus System ‘B’ Utility Bus Gen A Util A Unit Subs Util B Gen B Unit Subs Util B Gen A Unit Subs 27 1. Complete system redundancy – Tier 4 classification 2. 100% Backup Generator N+1 capacity 3. 2 x Independent Gen Paralleling systems, each capable of 100% backup & control of other system (GE Zenith-Fanuc unique design for Quadruple GE Zenith Controls – Power Quality redundancy! Automatic Transfer Switch Product Training

Typical GE Zenith Configuration Util ‘B’ Util ‘A Gen ‘A’ Gen ‘B’ Key Items – GE Recommendation • Full Manual backup, visible LEDs, Utility Grade relaying, PQ Metering • Synchronized-backup PLC each Gen System (2 x PLC each Gen system) • Gen System Graphical Display, + large monitor each system for display downstream load status • Each System Master control capable backup of other system 28 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training

ZDEC 2020 29 GE Zenith Controls – Power Quality Automatic Transfer Switch Product Training