Series 70 ePanel-2Wall-Mounted

Remote Power Panel

Technical Specifications

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© 2011 LayerZero Power Systems, Inc. Series 70 ePanel™ Technical Specifications

Series 70 ePanel™

Maximize Reliability With ePanel™The LayerZero Series 70 ePanel provides a means to distribute

power in a selective trip coordinated; safe manner.

Inspired by NFPA-70E, the Series 70 ePanel™ remote power panel

is ideally suited for today’s high density always-on data-processing

environments.

The Series 70 ePanel increases reliability in two ways:

• Utilizes Finger-Safe Panel Board

• Provides Selective Trip Coordination Up to 25kAIC

With its SafePanel™ advanced design, there are no live parts

exposed when the deadfront is open and you can add a branch

breaker safely. Selective tripping eliminates the catastrophic

problems associated with the tripping of the panel board

main breaker in the event of a fault in the distribution system

downstream of a panel board branch breaker.

The panel board of the ePanel is designed for maximum

operator safety with its fully enclosed molded plastic bus and

non-conducting screws. Designed for wall-mounted application,

all feeder and branch connections can be installed & thermal

scanned fully front of the Series 70 ePanel.

Panel board section has a Category 0 PPE requirement, per the

requirements of NFPA-70E

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© 2011 LayerZero Power Systems, Inc. Series 70 ePanel™ Technical Specifications

Agency Certification

ETL Listed to: UL 67 and CSA C22.2 No. 29-M1989

Reliability

• Insulated flexible bus • Compression connections at input feeder• Silver plated input feeder terminals for

compression connections (optional)• Machined cap screws & disc springs

Safety

•Separate section for additional safety: incoming feeders and main CB; separated from IP 20 finger safe panel board section.

• Dead-front hinged doors• Clear Translucent Polycarbonate

window to show breaker position • NFPA 70E friendly• InSight™ Ports to thermal scan input

feeder connections

Information Centricity

• Branch Circuit Monitor (BCM)• Branch current (2%) accuracy • Waveform Capture of each

branch circuit current• Branch level alarm thresholds• L-L or L-N configurable• Branch circuit alarm thresholds

• Main Circuit Monitor (MCM)• Mains current & voltage (2%

accuracy)• Waveform Capture of mains

current and voltage• Main circuit alarm thresholds

Series 70 ePanel

Main Circuit Breakers

Panel Boards

Electrical Configurations

• Voltage Ratings: 208/120V, 4-Wire,

400/230V, 4-Wire, 415/240V,

4-Wire, 480/277V, 4-Wire

• Current Rating: 225A (100% rated);

or 400A (100% rated)

• Main CB is fixed (standard); or plug-

in (optional)

• Main Circuit Breaker is 100%

continuous duty rated

• Branch CB fault rating: 25kAIC at

208/120V, 14 kAIC up to 480/277VConnectivity

• Ethernet• Bluetooth • Modbus/TCP

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© 2011 LayerZero Power Systems, Inc. Series 70 ePanel™ Technical Specifications

Series 70 ePanel

The Difference Is In The Details

The Series 70 ePanel provides power distribution with a focus on safety, reliability, connectivity, and information centricity. The

ePanel is on the forefront of design ingenuity, designed to meet the needs of professionals with the highest standards, providing

safe, selective-trip coordinated power that is flexible, scalable, and extremely reliable. The Series 70 ePanel empowers users with a

wealth of remotely-accessible information, compatible with standard system management software.

The SafePanel™ Opening Will Not Allow Ingress Of 1/2” (12.5mm) Diameter Probe.

Incoming Feeder Terminals Are Ready For Long Barrel, Two Hole Compression-Style

Lugs For High Reliability Installations

High speed, fault current limiting branch breakers make selective trip coordination

possible

LayerZero Cable Management Solutions Help Keep Wireways Organized

A Range Of Connectivity Options - Including Bluetooth, Make Information Accessible

Intuitive Panel Membrane Permits Power Information To Be Easily Accessed

LayerZero ePanels Are Convection Cooled For Higher Reliability

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© 2011 LayerZero Power Systems, Inc. Series 70 ePanel™ Technical Specifications

LayerZero Designs For Long-Term Performance

The Series 70 ePanel is constructed to be strong and exceptionally reliable, both

electrically and mechanically.

Designed for safe and easy maintenance, the shape of the SafePanel™ on the ePanel

significantly reduces the probability of operator error, helping to ensure maximum uptime.

Operators are less prone to make mistakes when working with a finger-safe panel. Design

details such as breaker bolts that are not live and insulated buswork also help increase

reliability by putting less stress on operators.

As a part of standard manufacturing quality assurance, each branch breaker undergoes

branch breaker undergoes one controlled thermal trip and two controlled instantaneous

trips to ensure that the branch breaker performance is within design tolerance.

Maximize Reliability With Selective Trip Coordination

The trend toward higher power density designs in modern data centers has created new difficulties in establishing proper circuit

breaker coordination. Higher capacity power distribution transformers with lower per-unit impedance has elevated fault current

levels and placed increasing coordination pressure on all downstream protective devices.

Main circuit breakers in series with traditional zero crossing branch circuit breakers may not permit proper selective trip coordination

at elevated fault current levels.

Selective trip operation via proper coordination is achievable at very high prospective fault current levels by using fault current

limiting (fast acting) branch circuit breakers.

Current limiting branch circuit breakers substantially ease the coordination design process, improve overall system reliability and

yield measurable uptime improvement for the mission critical facility end user.

Panel board critical bus outage lasts <4 msec. Critical loadscontinue to operate

Faulted branch CB trips in <4 msec

Downstreamfault

Main CB does not trip

High Speed Branch Circuit Breakers With Selective Tripping

Reliability

Selective-Trip Coordinated Branch Circuit Breakers Can Be Safely Added In Minutes

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© 2011 LayerZero Power Systems, Inc. Series 70 ePanel™ Technical Specifications

Branch Breakers Need To Be High Speed Because:

Push Close

Contact Closes

Current Flow (Load) Current Flow (Source)

True mission critical performance is achieved when ePanel

components are designed to trip selectively; AND have the

property of fault current-limiting or high-speed tripping.

Fast Acting Circuit Breakers

The circuit breakers in the Series 70: ePanel are plug-in, high-speed, fault current limiting, 25kAIC; designed for selective tripping. A

bolted fault on the output of one branch circuit breaker is interrupted in less than 4 milliseconds. This fast tripping action limits the

magnitude of the fault current; ensuring that the main breaker does not trip. Consequently, the other circuits in the panel boards

remain unaffected.

The voltage interruption on the main bus is less than a quarter cycle.

The panel board designed with fault withstand rating of 25kA for robust performance in a dynamic environment.

• Computer loads cannot

withstand an outage greater

than 20 milliseconds (roughly

1.25 electrical cycles), per ITIC.

• When a fault occurs downstream of

a branch breaker, it impinges zero-

voltage on the main bus of the panel

board until the breaker is able to trip

open and clear the fault.

• A conventional zero crossing breaker draws the entire available fault current for a half-cycle. This can result in the trip of the feeder breaker; resulting in a wholesale outage of the

panel board

• This means that the panel board

main bus experiences an outage

that loads cannot tolerate before

the fault is cleared.

Reliability

The ePanel Protects Upstream Devices

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© 2011 LayerZero Power Systems, Inc. Series 70 ePanel™ Technical Specifications

Reliability

Machined Cap Screws & Disc Springs

Our systems utilize machined cap screws and engineered disc springs with a flat pressure vs deflection profile to ensure that all bolted connections maintain constant torque through the life of the product.

Pres

sure

DeflectionSpring deflection due to the heating and cooling of the joint results in….

… significant changes joint pressure. Over time the joint loosens.

Springs that are based on Conical sections – used in LayerZeroproducts

Washers/Springs that are based on Parabolic sections

2%-3% failure rate for Washers/Springs that are based on Parabolic sections

Pres

sure

DeflectionSpring deflection due to the heating and cooling of the joint results in….

… insignificant changes joint pressure. Over time the joint integrity is maintained.

Springs that are based on Conical sections – used in LayerZeroproducts

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© 2011 LayerZero Power Systems, Inc. Series 70 ePanel™ Technical Specifications

`

Thermal/Overload Protection

- Slow over-heating situation- Protection of cables & wires against excessive heating - Thermal trip element (bi-metal) activates

Magnetic/Overload Protection

- Downstream phase-phase; or phase-ground fault- High rate of rise of current- Electromotive force creates a “hammer” effect- Magnetic element mechanically decoupled from thermal element

Tripping of an MCB: 1/2 ms after short-circuit current is released

Tripping of an MCB: 1 ms after short-circuit current is released

Tripping of an MCB: 1.5 ms after short-circuit current is released

Tripping of an MCB: 2 ms after short-circuit current is released

Tripping of an MCB: 2.5 ms after short-circuit current is released

Tripping of an MCB: 3 ms after short-circuit current is released

High Speed Tripping and Arc Extinguisher Action Demonstration

High Speed (Current Limiting) Circuit Breaker Operation

Arc Runner & Arc Chute

- Open the mechanical contact AND -Extinguish the arc - IN LESS THAN 4 milliseconds

Reliability

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© 2011 LayerZero Power Systems, Inc. Series 70 ePanel™ Technical Specifications

Designed for 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.

The connection well is over 1” deep.

1”

Safety

InSight™ IR Portholes Permit Safe Thermal Scanning

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© 2011 LayerZero Power Systems, Inc. Series 70 ePanel™ Technical Specifications

Open protocols

LayerZero utilizes open source protocols for its communications, which allows for:

• An enhanced ability to customize software• Flexible system integration options • Lower total cost of ownership (no per copy fees)• Elimination of vendor lock-in• No proprietary limitations • Provides a stable, well developed foundation

Connectivity to a WAN allows for the information to be accessible from any location, offering a variety of monitoring options.

Series 70 ePanel

- Summary Alarm- Panel Setup

Dry ContactsStandard Ethernet

Modbus/TCPSNMP http:// through a standard web browser

- Meters- Alarms - Waveforms- Setup - History/Event Log- Diagnostics

- Meters- Alarms

- Meters- Alarms

A variety of connectivity options provide operators with the ability to adapt LayerZero systems to fit existing networks without the complications of working with closed, proprietary systems.

The Series 70 ePanel is designed to make it easy to transfer and exchange power usage data, which is very useful towards making smart corporate decisions and policies.

A Flexible Approach

Connectivity

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© 2011 LayerZero Power Systems, Inc. Series 70 ePanel™ Technical Specifications

LCD Information

The front mounted LCD panel provides operators with a great deal of information, including:

• Alarms

• Main 1 Basic Meters

• Main 2 Basic Meters

• Branch Amps Meters

• Branch kW Meters

• Main 1 Derived Meters

• Main 2 Derived Meters

• Branch Derived Meters

Panel Board Power Monitor Basic FunctionsBranch circuit power monitorMain circuit power monitorLocal display of main and branch circuit parameters

Branch Circuit Power MonitorFor each pole of the 42-pole panel board, measures: Voltage; Current (A); Frequency (Hz); Power (kW); Apparent Power (kVA); Power Factor; and Power Consumption (kW-H)Wave form capture of over-current/fault event at any branch breaker

LayerZero systems easily connect to a standard web browser over a VPN so that the information can be securely accessed remotely.

The ePanel generates a wide variety of information, which can help managers better identify potential problems, assess the power usage to drive business decisions, and develop a basis for determining what can be done to improve the process.

Without measurable information, a greening or reliability strategy is difficult to follow through. The Series 70 ePanel provides the right information in a timely manner to help operators and managers make sound, well thought-out decisions.

Make Better Decisions With ePanels.

Information Centricity

Information Can Be Accessed Remotely Or From The LCD Panel

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© 2011 LayerZero Power Systems, Inc. Series 70 ePanel™ Technical Specifications

Technical Specifications

This document is subject to change without notice. Rev: 7/19/11

Each panel board is equipped with the ability to

communicate measured information remotely to the

Building Management System using open protocols. The

connectivity is Ethernet based and the design is plug-

and-play. Each panel board is assigned a fixed IP address.

Information is accessed via:

• Web-browser (http://) service

• MODBUS TCP/IP service

• SNMP service

• Bluetooth

ePanel 2-2: 225A, 84-circuit

225A, 100% rated fixed mount main CB

225A, 100% rated plug-in main CB option

ePanel 2-4: 400A, 84-circuit

400A, 100% rated fixed mount main CB

400A, 100% rated plug-in main CB option

Voltage configurations:

480V, 3-wire: 14kAIC

480Y/277V, 415Y/240V, 400Y/230V, 380Y/220V: 14kAIC

208Y/120V: 25kAIC

Enclosures sized to accommodate 75 °C feeders

ETL Listed to: UL 67 and CSA C22.2 No. 29-M1989

• Wall-Mounted• Door-in-door construction

» Hinged inner doors for safety» Two separate inner doors

a. Branch circuit panel inner door for normal panel board loading and wiring

b. Main Circuit breaker inner door for installation and maintenance access

» Hinged outer door• Viewing window on outer door for branch circuit

breakers and main circuit breaker position view• Viewing windows on doors• Top main cable access• Top/Bottom branch cable access• Circuit identification tags on panel board• Plug-in main circuit breaker is optional• Input feeder connection options:

» Single mechanical lug» Dual mechanical lug (accepts two conductors per

phase)» NEMA 2-hole studs for long-barrel, 2-hole

compression lugs

To support the total needs of an increasingly information centric critical power distribution environment, the Series 70 ePanel may be optionally equipped with a branch circuit level and panel board main circuit power monitoring. The Panel Board Branch Power Monitor allows site management to monitor power consumption. This provides information that is increasingly vital to the revenue model of many data processing units.

In addition to measuring the main bus voltage of the panel board and delivering Waveform Capture upon anomaly of main bus voltage, the power monitor measures the following parameters for each of the 42 branch circuits in a given panel board:

Mechanical Configurations Electrical Configurations

Connectivity Option Power Monitoring Option

Product Name

Panel Board & Main CB

Rating

Main CB Mounting

Enclosure Width

Enclosure Height Enclosure DepthInput Feeder Termination

Single, Mechanical

Dual, Mechanical

Two-Hole, Compression

ePanel 2-2 225A Fixed 47"W 80"H 80"H 80"H 10.5"D

400A Fixed 47"W 80"H 80"H 80"H 10.5"D

ePanel 2-4 225A Plug-in 47"W 80"H 80"H 80"H 10.5"D

400A Plug-in 47"W 80"H 80"H 80"H 10.5"D