LayerZero Series 70 ePODs: Dual Type-P

Series 70 ePODs: Dual Type-P
Static Transfer Switch → Two Transformers → Distribution
The Foundation Layer
Product Brochure

ePODs Dual Type-P Is Inspired by NFPA-70E
The Dual Type-P design provides switching between two independent power sources on the primary side of two
transformers providing dual power-path distribution capability. The Series 70 ePODs: Dual Type-P provides the ability to
transfer power between two or three sources in quarter of an electrical cycle, while delivering that power to up to twelve
sub-feed circuit breakers. The Finger-Safe SafePanel is IP-20, inspired by the reccomendations of NFPA-70E.
The LayerZero ePODs: Dual Type-P PDU
Maximizes Operator Safety
2
Power Distribution UnitSeries 70 ePODs: Dual Type-P
2 © Copyright 2016 LayerZero Power Systems, Inc.

;; Optional Triple Modular Redundancy: TMR Contains Fully-Independent Control Paths With No Single Point-Of-Failure
;; Safe Bypass Procedure: Mechanical Bypass Interlock Eliminates Human Error When Performing Bypass Procedures
;; Voice Guided Bypass: Step-By-Step Instructions With Audio and Video Guidance To Assist Operators Through Bypass
;; Convection Cooling: Natural Convection-Cooled Heat Dissipation System is Maintenance-Free
;; Epoxy Coated Buswork: Maximizes Reliability By Eliminating The Possibility of Bus-To-Bus Faults
;; Silver Plated Terminals: Silver Has Excellent Conductivity To Provide Superior Electrical Performance and Reliability
;; Maintenance-Free Joints: Brazed Joints Are Permanent And Maintenance-Free, Maximizing Product Life
;; Machined Hardware: Machined Cap Screws and Engineered Disc Springs Maintain Constant Torque Throughout Product Life
;; Screw Thread Inserts: Prevents Screws From Loosening Under Vibration For Long-Term Reliability
;; Optical Fiber Based Controls: Eliminates Noise and Interference While Isolating Components from High Voltage
;; Serialized Critical Board Tracking: Critical Boards Are Serialized And Cataloged in an Active Database For Traceability
;; Transformer Vibration Isolation: Vibro-Elastic Pads to Absorb Vibrations from the Transformer
Reliability
LayerZero’s ePODs: Dual Type-P Is Equipped Fully-Loaded
Safety
;; InSight™ IR Portholes: Bolted Connections & Critical Boards Can Be IR Scanned With the Dead-Front Doors Closed
;; Sectionalized Components: Isolated Sections That Can Be Safely De-Energized For Performing Maintenance
;; Polycarbonate Windows: Allows Critical Board LEDs To Be Viewed With The Dead-Front Door Closed
;; Front-Only Access: Installation and Maintenance Can Be Safely Performed Without Side or Rear Access
;; Dead Front Hinged Doors: Barrier To Provide A Safe Working Area With No Exposed Live Parts
;; SafePanel™ Distribution: NFPA-70E Inspired Finger-Safe Panel Board With No Exposed Live Parts
Connectivity
;; Ethernet Connectivity: Secure VPN Router Connects To Network For Advanced Remote Monitoring Capabilities
;; Modbus/TCP: Open Connectivity to Existing Monitoring Systems Without Proprietary Limitations
;; NTP Time Clock Synchronization: Facilitates Timeline-Based Logging For Post-Event Reconstruction
;; SNMP Connectivity: Permits Remote Management Via Simple Network Management Protocol
;; Real-Time Waveform Capture: Automatically Captures A Picture Of The Power Three-Cycles Before and After Every Event
;; Local Touch-Screen Interface: Password-Protected Color Touch-Screen GUI For Local STS Setup/Operation/Administration
;; Black-Box Forensics: Captures and Records All Events To Provide Vital Information In Root-Cause Analysis
;; Waveforms Automatically Emailed: Capability to Send Waveform Captures To Designated Individuals For Every Transfer

Product Features
eSTS:
Size: 250A, 400A, 600A, 800A
Voltage: 480V, 3-W, 600V, 3-W
Redundancy:
• Triple Modular Redundant (TMR)
• Single Module Redundant (SMR)
Output Switch:
• Redundant
• Non-redundant
Source 1 Input Isolation Section
Source 1 Transformer Section
Source 2 Input Isolation Section
Source 2 Transformer Section
Distribution Section:
Sub-feed distribution
• 1200A SafePanel
ePODs: Dual Type-P Distribution
Feeds Directly to Power Panels.
Equipment Layout

17
18
19
20
1. Alarmed Doors
2. Hinged Dead Front Doors
3. Silver Plated Terminals
4. 15” Color Touch Screen GUI
5. Printed Bypass Instructions
6. Polycarbonate Window
7. InSight™ IR Portholes
8. Convection Cooled Heat Sinks
9. Staggered Gate Drive Arrangement
10. Epoxy Coated Buswork
11. Circuit Breakers
12. Redundant Power Supplies
13. Louvered Convection Cooled Intake
14. Transformer
15. Transformer Circuit Breaker
16. SafePanel™
17. SafePanel™ Shrouds
18. Universal Dead Front Door
19. Cable Organization Clips
20. Up to 12 Subfeed Circuit Breakers
12
3
4 5
6
7
8
9
10
11
12
13
14 1414
15
14
1516 16
Equipment Construction Detail

LayerZero ePODs: Dual Type-P Reliability Overview
The LayerZero ePODs: Dual Type-P Provides Many Dimensions of
Reliability:
• Control System Reliability
• SMR (Single Module Redundancy, Standard)
• TMR (Triple Modular Redundancy, Optional)
• Control Power Supply Reliability
• Signal Reliability
• Operator Procedural Reliability
Gate Drive 1
Source 1 A
Gate Drive 2
Source 1 B
Gate Drive 3
Source 1 C
Gate Drive 4
Source 2 A
Gate Drive 5
Source 2 B
Gate Drive 6
Source 2 C
Source 1
Control
Source 2
Control
WAN Port
Fiber Optics
SCB 1
Single Module Redundancy (SMR) Reliability (Standard)
Single Module Redundancy is a cost-effective topology that provides
redundant power paths to mission-critical equipment. In SMR
systems, sources each have built-in triple redundancy of processors.
In addition, every phase is controlled with a separate gate drive
board.
LayerZero Single Modular Redundant topology is unique that it the
system is fail-safe, maintaining full switching functionality even if a
critical board were to fail.
Reliability Overview

eSTS SMR Triple Redundant Power Supply Architecture
Divided into four (4) logical failure groups:
• System controls
• Source 1 gate drives
• Source 2 gate drives
• Peripherals.
The three (3) available source of power from which to supply control
power to each failure group are:
• Source 1
• Source 2
• STS Output.
LayerZero’s STS design incorporates twelve (12) power supplies (3
power sources x 4 failure groups.) The resultant control power topology
utilizes all possible power paths to the four logical STS failure groups;
and is the most comprehensive and redundant power supply system in
existence.
Reliability Features: Single Module Redundant (SMR) Redundancy
Peripherals
PS 1
S1 A-B
Source 1
A B C
Source 2
A B C
PS 4
S1 B-C
PS 7
S1 A-C
PS 10
S1 A-B
PS 3
S2 B-C
PS 6
S2 A-C
PS 9
S2 A-B
PS 12
S2 B-C
System Controls
Gate Drives,
Source 1
Gate Drives,
Source 2
GD 1 GD 3 GD 5
SCB 1 SCB 2
TMR Only
SCB 3
TMR Only
GD 2 GD 4 GD 6
PS 5
Out A-B
System Controls
PS 8
Out B-C
Gate Drives S1
PS 11
Out A-C
Gate Drives S2
PS 2
Out A-C
Peripherals
Output
Bus
A
B
C
eSTS SMR Triple Redundant Processors
• Separate/independent processors for Source 1, Source 2 and
Output power quality analysis
• If Source 1 processor malfunctions then system is able to be
commanded to transfer to Source 2; & vice versa.
• If main control system fails then STS continues to conduct power to
the load from the existing source of power. (However STS is unable
to transfer to the other source)
• Each phase of each source is controlled with a separate gate drive
circuit board.
S1 S2 Output
Gate
Drive 1
Gate
Drive 2
Gate
Drive 3
Gate
Drive 4
Gate
Drive 5
Gate
Drive 6
A B C A B C
Source 1 Transfer Control Source 2 Transfer Control

Reliability Features: Triple Modular Redundancy (TMR) *Optional
eSTS TMR Triple Redundant Power Supply Architecture
Has All Redundancy Features of SMR Architecture, Plus:
Each STS has three independent sets of analog and digital data
acquisition and control systems. There is no direct communication
between the three systems. The three systems do not even share a
common system clock.
• Each control system acquires voltage and current data
independently
• Each control system determines whether a source is good/bad
independently
• Upon loss of a source, each control system makes decisions to
transfer independently
Each SCR pair is driven by three separate actuators (gate drives)
Even if an entire control path or its subcomponent were to fail; and
then if the active power source were to fail, the STS is designed to meet
its emergency transfer specifications. It is able to complete its mission
of transferring to the alternate source.
Gate Drive 1
Source 1 A
Gate Drive 2
Source 1 B
Gate Drive 3
Source 1 C
Gate Drive 4
Source 2 A
Gate Drive 5
Source 2 B
Gate Drive 6
Source 2 C
Source 1
Control
Source 2
Control
Source 1
Control
Source 2
Control
Source 1
Control
Source 2
Control
WAN Port
Fiber Optics
SCB 1
SCB 2
(TMR)
SCB 3
(TMR)

Fiber Optic Controls Increase System Reliability
Fiber optic based controls eliminate noise and interference, while
isolating components from high voltage.
Optical fiber allows service to be reliably connected, while
protecting the equipment.
In LayerZero’s ePODs: Dual Type-P design, the gate drives (at Power
Circuit Voltage) recieve control signsals via optical fibers.
Reliability Features

Mechanical Bypass Interlock
In order to minimize the possibility of operator error during equipment
bypass operations, LayerZero provides:
1. Interlocked breakers
2. Mechanisms to ensure that a source cannot be bypassed without
the STS on the correct source.
3. Safeguards to make certain that sources cannot be connected to
each other inadvertently.
4. A voice-prompted bypass procedure that guides the operator
through the sequence.
5. A step-wise pictorial & video presentation is provided on the
touch-screen display during bypass.
Voice Guided Bypass
The number one cause of static switch load-loss is operator error
during maintenance bypass. To help prevent operators from
completing the bypass procedure out-of-sequence, our products
feature a voice prompted bypass procedure. This instructs the
operator in a step-by-step course of action of the process, with
only one operation per screen. Visual and audio cues provide clear
instructions on the bypassing sequence, reducing the probability of
operator error.

No Fans, Dust Filters, or Fan Fuses
Fans and fan sensors are one of the most common components to fail.
For maximum uptime, eSTS systems do not contain any fans, dust filters
to change, or fan fuses to replace. The Series 70 ePODs: Dual Type-P
utilizes a natural convection-cooled heat dissipation system.
The heat sink arrangement is staggered between sources and phases to
minimize the creation of extreme thermal gradients between heat sink
columns when conducting on one source or the other.
Epoxy Coated Buswork
Our usage of epoxy coated buswork helps ensure safety, protecting
operators from being exposed to live parts, and makes the system
inherently more reliable by eliminating the possibility of bus-to-bus
faults.
Silver Plating
LayerZero utilizes silver plating on all bus joints and terminals to be
able to provide the highest performance. Silver has high conductivity
and low resistance - which makes for a great contact.

Vibration Isolation Damper Mounts
Transformers in the Series 70: ePODs Type-P Power Distribution
Unit are equipped with vibration isolation damper mounts, helping
to reduce the amount of vibration and noise that originates from
transformers, ultimately leading to a higher reliability of electrical
and mechanical connections over the life of the product.
Sectionalization Maximizes Operator Safety
Operators are well-protected from exposed connections. Normal
operator sections (breakers/switches) are physically separated
from the power electronics and control electronics sections, so that
maintenance on a section can be safely performed. If maintenance is
required on a particular section, power can be bypassed to another
section to allow for safe repairs to be made.
Ease of Maintenance

InSight™ IR Portholes Permit Scanning of Bolted
Connections with Dead-Front Doors Closed
Strategically positioned IR-scan portholes to enable safe thermal
scanning of all bolted connections with the deadfront closed, without
exposing the operator to power circuit voltage. Thermal scans can be
done from the front – without ever having to open the dead-front door.
The IR window swivels upward and unlocks with key-hole access to
reveal a mesh, allowing the operator to point-and-shoot thermal
cameras to obtain readings.
Ease of Maintenance

View Status LEDs and Distribution CB Positions With
Dead-Front Doors Closed
Our Series 70 product line was inspired by NFPA-70E, to help data
centers drastically reduce the risks of their energy distribution
systems.
Operators can view the status of diagnostic LEDs without exposure
to the energized power electronics section. In addition, SafePanel
circuit breaker positions can be viewed with the dead-front door
closed.
Modbus/TCP http:// through a
standard web browser
Network Time Protocol
(NTP) Compliant
Simple Network
Management Protocol
(SNMP)
Waveforms
Automatically Emailed
Series 70 ePODs:
Dual Type-P
Standard
Ethernet
Dry Contacts
• Meters
• Alarms
• Meters
• Alarms
• Waveforms
• History/Event Log
• Diagnostics
• Summary Alarm
• On Source 1
• On Source 2
• Source 1 Available
• Source 2 Available
Ease of Maintenance/Connectivity Options

The Breaker Is Inserted Into The SafePanel The Handle Is Unlocked
Screws Help Secure The Breaker For Maximum Safety, The SafePanel Has
Recessed Bus Work and Finger Safe Lattice.
Dual Type-P 1200 A Circuit Breaker Installation Process
The LayerZero SafePanel™
The Series 70 ePODs: Dual Type-P features an IP-20, finger-safe
panel board, meaning that the opening will not allow ingress of ½”
(12.5mm) diameter probe, for maximum operator safety.
An arc can form as two live conductors are separated – such as
the removal of a circuit breaker from a panel board. The SafePanel
design ensures that a potential arc would be contained in the
connection well so that even if a branch breaker were to be
removed, the arc would be contained in the connection well.
Insulated with the components deeply isolated, removal of the
breaker is safe and easy.
Safety Features

The Series 70: eSTS is equipped with Zen SSQM (Static Switch
Quality Monitoring), an all encompassing monitoring system with
local and remote communications options.
From basic monitoring & alarm reporting, to advanced power
quality monitoring functionality, Zen SSQM provides a wide-range
of options to help you be aware, be vigilant, be proactive in your
quest to create a safe, stable and reliable operation.
Zen SSQM Provides Answers
Zen SSQM provides timestamped pictures of waveforms before and after events, providing information that enables facilities to go
back in time to methodically identify and correct the root causes of events. Zen actively captures power quality information at the
STS, PDU, and RPP - permitting thorough post-event analysis.
Product Name: Series 70 ePODs: Type-P
Unit Name: 500 + 1000 turn CTs
Serial #: 10028-34
Capture Reason: SQ Xfer 0-1
Captured By: scb122
Capture Time: 01-04-2016 6:53:08 PM
Microticks: 1449941
Phase A
Phase B
Phase C
Phase N
Phase G
Source 1 Volts L-L
Milliseconds
V
o
l
t
s
0
-200
200
-400
400
-600
600
-800
800
-1000
1000
Source 2 Volts L-L
Milliseconds
V
o
l
t
s
0
-200
200
-400
400
-600
600
-800
800
-1000
1000
Load Volts L-L
V
o
200
400
600
800
1000
Trigger Event
3 Electrical Cycles 3 Electrical Cycles
Waveform Capture of Current in a Source TransferPhase A
Phase B
Phase C

Zen SSQM Parameters Mains
Subfeeds or Branch
Circuits
Voltage Inputs and Output
Voltage
Frequency (Hertz)
Phase Rotation
Current Inputs
Current (Amps)
Current Fraction of Rating (Percent)
Current Imbalance (Percent)
Real Power (kilowatts)
Apparent Power (kilovolt-amperes)
Reactive Power (kilovolt-amperes reactive)
Power Factor
K Factor
Crest Factor
Alarms
Summary Alarm
Voltage (High, Low)
Overload
Thermostat (High, Low)
THD Over Limit
Frequency (Over, Under)
I A/B/C K-Factor Over Limit
Average K-Factor Over Limit
Incorrect Phase Rotation
Voltage Failure
I G1/G2 Over Ground Fault Limit
I G1/G2 Over Ground Overcurrent Limit
TVSS 1/2/3/4 Failure

Up to 12 CB positions
1200A SafePanel 1
Source 1
Input
Source 2
Input
480V, 3-phase, 3-wire
or
600V, 3-phase, 3-wire
202BC102BC
201BC101BC CNCN
NO NO
CB302CB301 NC NC
Up to 12 CB positions
1200A SafePanel 2
T620 T720
120/208V, 3-phase, 4-wire
TVSS620
120/208V, 3-phase, 4-wire
SA720TVSS720SA620
NCCB601 NO CB602 NCCB641 NO CB642
NCCB604 NO CB605 NCCB644 NO CB645
Series 70 ePODs: Dual Type-P

ePODs: Dual Type-P Models with Withstand Ratings
Frame Rating 480 V 575 V 600 V
250 A
150kAIC; 100kAIC; 65kAIC; 35kAIC;
25kAIC
100kAIC; 65kAIC; 35kAIC; 25kAIC; 18kAIC400 A
600 A
800 A 100kAIC; 65kAIC; 50kAIC; 35kAIC 42kAIC; 35kAIC; 25kAIC; 20kAIC
Mechanical Characteristics
75 kVA - 300 kVA 400 kVA
Dimensions (side facing distribution): 154”W x 86”H x 36”D (3911 mm x 2032 mm x 914 mm) 178”W x 86”H x 36”D (4521 mm x 2032 mm x 914 mm)
Dimensions (front facing distribution): 202”W x 86”H x 36”D (5131 mm x 2032 mm x 914 mm) 226”W x 86”H x 36”D (5740 mm x 2032 mm x 914 mm)
Weight 2,650 - 4,050 lbs (1202 kg - 1837 kg) Varies on Configuration, Please Contact LayerZero Engineering
Heat Dissipation Varies on Transformer Efficiency, Please Contact LayerZero Engineering.
Frame Construction Welded Frame
Electrical Connections Flexible Laminated Bus, Silver-Plated Solid Busbar
Color Textured Powder Coat White (RAL 7035), Blue (RAL 5017), Black, Custom
Seismic Floor Anchors Optional
Seismic Floor Stand Optional
Sectionalization Engineered Composite Insulation, Dead Front Doors
Electrical Characteristics
Static Transfer Switch
System Input Voltage 480 V, 3-Phase, 3-Wire + Ground; 575 V, 3-Phase, 3-Wire + Ground; 600 V, 3-Phase, 3-Wire + Ground
System Output Voltage 120/208 V, 3-Phase, 4-Wire + Ground; 240/415 V, 3-Phase, 4-Wire + Ground
eSTS Current 250 A 400 A 600 A 800 A
Transformer Sizes 75 kVA 130 kVA, 144 kVA, 150 kVA 216 kVA, 225 kVA 250 kVA, 288 kVA, 300 kVA
Number of Inputs 2, 3
Number of Output CBs 1, 2
Frequency 50 Hz, 60 Hz
Poles 3-pole, 4-pole
Phases 3 Phase, 3 Wire, 4 Wire + Ground
Neutral Rating 100%, 150%, 200%
eSTS Transfer Time < 4ms (3 ms typical)
eSTS Redundancy Single Modular Redundancy, Triple Modular Redundancy Optional
Circuit Breaker Type Electronic Trip, Molded Case Switch, Thermal Magnetic Trip
Circuit Breaker Mounting Type Plug-In
eSTS TVSS Optional
Subfeed Distribution
Distribution SafePanel™ Distribution
Power Quality Monitoring
Power Quality Monitoring Technology Zen SSQM™ (Static Switch Quality Monitoring)
Waveform Capture Local Display, Remote Display via Web Browser, Waveforms Automatically Emailed
Voltmeter Input sources and Output, for each phase
Ammeter Input sources and Output, for each phase
Frequency Meter Both Sources
Real-Time Synchroscope Phase Angle Meter Between Sources
Metering Apparent Power, Real Power, Power Factor, Output Total Harmonic Distortion
Time Stamped Transfer Count From First Day Use, From Last Reset
CB Status Indicator Open/Closed/Tripped Circuit Breaker
Source Indicator Preferred Source
Phase Indicator When Any Two Sources Are Within Window
Current Path Indicator Energized Current Path
All product specifications are subject to change without notice.

Operational Characteristics
Transfer Modes Manual, Automatic
Inrush Mitigation Technology Patented Dynamic Phase Compensation Algorithm (U.S. Patent 7,589,438 B2)
Password Protection User Configurable Roles
Cooling Convection Cooling
Cable Access Top/Bottom
Service Access Front Only
Bypass Interlock Mechanism Mechanical
Noise & Interference Isolation Optical Fiber
IR Scan Port Type InSight™ IR Portholes
SCR Type Puck
Display Type 15” Color Touch Screen
Display Resolution 1024x768
Bypass Assistance Voice-Guided Bypass
Audio Bezel-Mounted Stereo Speakers
Languages English, French
Mimic Panel Digital
Setpoints Control Digital
Power Supplies Redundant
Connectivity
Meters Local Display, Ethernet, Modbus/TCP, http via Web Browser (Non-Proprietary)
Alarms Local Display, Ethernet, Modbus/TCP, http via Web Browser (Non-Proprietary)
Summary Alarm Dry Contacts
Waveforms Local Display, Ethernet, http via Web Browser (Non-Proprietary)
History/Event Log Local Display, Ethernet, http via Web Browser (Non-Proprietary)
Diagnostics Local Display, Ethernet, http via Web Browser (Non-Proprietary)
Time Synchronization Network Time Protocol (NTP)
Standards Conformance: Static Transfer Switch
UL ETL Listed to UL 1008S
CSA ETL Listed to C22.22 No 107.
Standards Conformance: SafePanel Distribution
UL ETL Listed to UL 60950
CSA C22.2 No 29-M1989

Number of Output Circuit Breakers
Number of Available SafePanel™ Slots 36
CB Rating Number of Slots Required
100 AF 2
250 AF 3
400 AF 3
400 AF 100% 6
800 AF 6
36 Total
Available Slots
1 Slot
2 Slots
3 Slots
6 Slots
Universal Dead FrontSafePanel™ Panel Board
Interchangeable
Plates Fit All CB Sizes
Blank Plates

LayerZero Power Systems, Inc.
1500 Danner Drive
Aurora, OH 44202 U.S.A.
© 2016 LayerZero Power Systems, Inc.
LayerZero Power Systems, LayerZero.com and the LayerZero logo are registered trademark of LayerZero.
Learn more at www.LayerZero.com
Rev. 7/16

LayerZero Series 70 ePODs: Dual Type-P

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