Power Electronics Standalone NB 120 User manual

NB 120
POWER ELECTRONICS
2
ABOUT
ABOUT THIS MANUAL
PURPOSE
This manual contains important instructions for the installation, configuration and use of the electric vehicle
charger Standalone NB 120, which manages the power transformation and main control for the charge.
From now on, this manual refers to Standalone NB 120 with the term “equipment” or “charger”.
Please notice the NB 120 range includes the chargers NB 60 / NB 90 / NB 120.
Power Electronics reserves the right to modify product features.
TARGET AUDIENCE
This manual is intended for qualified customers who will install, configure and operate the NB 120
chargers.
Only qualified technical personnel validated by Power Electronics may install and start up the equipment.
POWER ELECTRONICS CONTACT INFORMATION
Power Electronics USA Inc.
1510 N. Hobson Street, Gilbert,
Phoenix
AZ 85233
UNITED STATES OF AMERICA
US Sales: 602-354-4890 / [phone]
Fax: [phone]
Power Electronics España, S.L.
Polígono Industrial Carrases
Ronda del Camp d’Aviació nº 4
46160, Llíria (Valencia)
SPAIN
Tel: [phone] / Fax: [phone]
Website: www.power-electronics.com

POWER ELECTRONICS
NB 120
REVISIONS
3
REVISIONS CONTROL
DATE (DD/MM/YYYY)
REVISION
DESCRIPTION
30 / 11 / 2021
A
First edition.
The equipment and technical documentation are periodically updated. Power Electronics reserves the right to modify all or part of the
contents of this manual without previous notice. To consult the most updated information on this product, you may access our website
www.power-electronics.com, where the latest version of this manual can be downloaded. The reproduction or distribution of the
present manual is strictly forbidden unless express authorization from Power Electronics.

NB 120
POWER ELECTRONICS
4
TABLE OF CONTENTS
TABLE OF CONTENTS
ABOUT THIS MANUAL ...............................................................................................................................2
ACRONYMS.................................................................................................................................................6
SAFETY SYMBOLS.....................................................................................................................................8
SAFETY INSTRUCTIONS............................................................................................................................9
TORQUE AND SCREW SIZING.................................................................................................................15
INTRODUCTION...................................................................................................................................16
Equipment overview...........................................................................................................................17
Charging process ...............................................................................................................................19
Advanced charge functionality............................................................................................................20
Open door detection...........................................................................................................................20
Power retrofit (optional)......................................................................................................................21
Regulatory framework ........................................................................................................................21
TECHNICAL CHARACTERISTICS ......................................................................................................22
Standalone NB 120 –IEC ..................................................................................................................22
Standalone NB 120 –US ...................................................................................................................23
DIMENSIONS AND WEIGHT................................................................................................................24
HANDLING AND TRANSPORTATION ................................................................................................26
Reception...........................................................................................................................................26
Storage...............................................................................................................................................26
Extended Storage...............................................................................................................................27
Unpackaging ......................................................................................................................................27
Handling and transportation ...............................................................................................................27
PREPARATION FOR INSTALLING THE EQUIPMENT.......................................................................30
Site recommendations........................................................................................................................30
Minimum working distances ...............................................................................................................32
Anchoring of the equipment................................................................................................................33
Ventilation system ..............................................................................................................................34
CABLE ACCESS AND CONNECTIONS..............................................................................................35
Access................................................................................................................................................36
Connections .......................................................................................................................................38
PROTECTIONS ....................................................................................................................................44
Insulation monitoring ..........................................................................................................................44
Overcurrent and short circuit protection..............................................................................................44
Overvoltage protection (optional)........................................................................................................44
Residual current protections (RCD) (optional)....................................................................................44

POWER ELECTRONICS
NB 120
TABLE OF CONTENTS
5
INTERFACE..........................................................................................................................................46
Controls..............................................................................................................................................46
LED indicators....................................................................................................................................46
COMMUNICATIONS.............................................................................................................................47
Ethernet communication.....................................................................................................................47
Optical fiber communication ...............................................................................................................47
Wi-Fi communication..........................................................................................................................47
3G / 4G communication......................................................................................................................48
LOTO procedure..................................................................................................................................49
Equipment statuses............................................................................................................................50
LOTO actions .....................................................................................................................................51
Check points for absence of voltage...................................................................................................53
COMMISSIONING ................................................................................................................................54
SAFE STOP..........................................................................................................................................56
MAINTENANCE....................................................................................................................................57
Equipment statuses............................................................................................................................57
Checklist.............................................................................................................................................58
Power revision (status 1)....................................................................................................................59
Dead revision (status 2)......................................................................................................................60

NB 120
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ACRONYMS
ACRONYMS
The terms commonly used in the documentation of Power Electronics’ products are listed in the table
below.
Please notice this is a general series of terms and it encompasses all our product divisions (industrial,
solar, storage, and electric mobility), thus, some of the following expressions may not apply to this
particular manual.
ACRONYM
MEANING
AASS
Auxiliary Services
AC
Alternating Current
AI
Analogue Input
AO
Analogue Output
BESS
Battery Energy Storage System
BMS
Battery Manager Solution
CCID
Charge circuit interrupting device
CCL
Charge Current Limit.
CCS
Combined charging system –charging and communications protocol following the standard IEC
61851-23 Annex CC
CHAdeMO
Charging and communications protocol following the standard IEC 61851-23 Annex AA
CPU
Central Processing Unit
DC
Direct Current
DCL
Discharge Current Limit
DI
Digital Input
DSP
Digital Signal Processor
DO
Digital Output
EV
Electric Vehicle
FPGA
Programmable device (Field-Programmable Gate Array)
FRU
Field Replaceable Unit
GFDI
Ground Fault Detector Interrupter
GPRS
General Packet Radio Services, a data transmission system
HVAC
Heating, Ventilation, and Air Conditioning
IGBT
Insulated Gate Bipolar Transistor
IMI
Insulation monitoring device
IT
Grid system where the power supply is kept isolated and the electrical equipment system is
grounded.
LOTO
Lock Out –Tag Out
MCB
Miniature Circuit Breaker
MPCS
Multi Power Conversion System
MID
Measuring Instrument Directive
MV
Medium Voltage. This term is used to refer to high voltage in general
PE
Ground connection
PI
Proportional and Integral
POI
Point Of Interconnection
PPE
Personal Protection Equipment

POWER ELECTRONICS
NB 120
ACRONYMS
7
ACRONYM
MEANING
PV
Photovoltaic energy
RCD
Residual Current Device
RCM
Residual Current Monitor
RFID
Radio Frequency Identification
SOC
State Of Charge –referred to battery
SOH
State Of Health –referred to battery. It compares the actual state of the battery to its initial
conditions. It is measured in percentage
STO
Safe Torque Off
TN
Grid system where the power supply is grounded, and the electrical equipment system is brought
to the same ground through the neutral connector.
TT
Grid system where both the power supply and the electrical devices are connected to the ground
via separate connections
UPS
Uninterruptible Power Supply
VSD / VFD
Variable Speed Drive, Variable Frequency Drive. Both terms are used

NB 120
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SAFETY SYMBOLS
SAFETY SYMBOLS
Always follow safety instructions to prevent accidents and potential hazards from occurring.
In this manual, safety messages are classified as follows:
Other symbols used in this manual for safety messages are the following:
WARNING
Identifies potentially hazardous situations where dangerous voltage may be
present, which if not avoided, could result in minor personal injury, serious
injury or death.
Be extremely careful and follow the instructions to avoid the risk of electrical
shocks.
CAUTION
Identifies potentially hazardous situations, which if not avoided, could result
in product damage, or minor or moderate personal injury.
Read the message and follow the instructions carefully.
NOTICE
Identifies important measures to take in order to prevent damage equipment
and warranty lost, as well as encouraging good use and environmental
practices.
Hot surface. Be careful and follow the instructions to avoid burns and personal injuries.
Risk of fire. Be careful and follow the instructions to prevent causing an unintentional fire.
Caution, risk of electric shock. Energy storage timed discharge. Wait for the indicated
time to avoid electrical hazards.

POWER ELECTRONICS
NB 120
SAFETY INSTRUCTIONS
9
SAFETY INSTRUCTIONS
IMPORTANT!
Read carefully all documentation before handling the equipment and pay special attention to safety
recommendations to maximize the performance of this product and ensure its safe use and installation.
This document covers the most important and frequent potential causes of damage to equipment or
personnel. It is the responsibility of the installer to follow the instructions provided in this manual, follow
good electrical practices and identify all warnings and recommendations before starting up and operating
the electric vehicle chargers.
WARNING
FIRST CONSIDERATIONS
The operations detailed in this manual can only be performed by qualified personnel.
The condition of qualified personnel referred to in this manual shall be at least the condition that meets
the standards, regulations and safety laws applied to the installation and operation of this equipment.
Read and retain the Hardware and Installation Manual for future reference.
Before assembling the equipment, read all instructions, caution signs and other sections of this manual.
Failure to follow these warnings can result in severe electrical shock or death. Pay attention at all times
to prevent possible accidents.
In addition to the recommendations in this manual, local and site-specific safety procedures should
be observed. Additionally, local and national electrical regulations must be followed to avoid personal
injury and/or equipment damage.
The electric vehicle charging system may cause an ELECTRICAL DISCHARGE if the warnings
indicated in this manual are not followed.
Make sure the equipment is completely disconnected from the power supply and grounded before
handling or servicing. Otherwise, there is a risk of electric shock. To avoid electrical hazards,
disconnect the input supply, ground the equipment, remove control voltages before performing any tasks,
and ensure that busbars are completely discharged. Warning and safety labels must be properly affixed
to terminals, cabinets, and control panels in accordance with local regulations.
When working on electrical installations, always remember to apply the FIVE GOLDEN RULES:
1. Visible shutdown of all live sources.
2. Mechanical locking of all cutting elements.
3. Verify the absence of voltage by using the appropriate tools for the voltage of the installation.
4. Ground and short-circuit all possible voltage sources.
5. Delimit and mark the work area.
Do not modify the equipment. If you fail to do so, Power Electronics will not assume any liability, and
the product warranty will be voided.

NB 120
POWER ELECTRONICS
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SAFETY INSTRUCTIONS
WARNING
The housing must be properly closed, otherwise it may not adequately protect people or
property from any abnormal situation inside the equipment.
Always follow the instructions in the manual to move and position the equipment. The weight of
this equipment can cause injuries, serious injuries and even death if not handled correctly.
The output airflow can reach high temperatures that could harm people exposed to it.
Electric shock danger. The steps to isolate the equipment must be carefully followed before performing
any task or opening any cover of the equipment. Avoid inappropriate actions that may cause electric
shock.
Always wear the appropriate personal protective equipment (PPE) for each task and work in
electrical areas with dry hands. Otherwise, you may get an electric shock.
Do not use cables with damaged insulation. Do not subject cables to abrasion, excessive stress,
heavy loads or pinching. Otherwise, you may get an electric shock.
Do not supply power to a damaged equipment or with missing parts, even if the installation is
complete. Otherwise, you may get an electric shock.
In the event that the equipment stops due to a loss of power, do not do any work on it. The auto-
restart function may be enabled, and you may receive an electric shock.
The equipment has capacitors. Wait until the capacitors have discharged before performing any
maintenance task.
USE
Do not use this equipment for purposes other than the electric vehicle charging with the modes
provided for this product and defined in this manual.
Do not disconnect or connect any terminals while the equipment is running. Otherwise, you may
get an electric shock and the equipment may be damaged.
Do not use this product if its enclosure or electric vehicle connector(s) (on both the equipment and
vehicle sides) are broken, cracked or otherwise damaged. Otherwise, you may get an electric shock.
CONNECTION TO EARTH
Prevention of electric shock:
•The equipment chassis must be properly grounded to prevent a possible electrical shock if a
leakage current flows through the enclosure. Disconnect all power supplies before proceeding
with maintenance operations inside the equipment.
•Only connect the grounding device to the equipment's grounding plate. Do not use the enclosure
or chassis screws for grounding.
•The protective earth wire must be connected first and last disconnected.

POWER ELECTRONICS
NB 120
SAFETY INSTRUCTIONS
11
CAUTION
Install the equipment, both the power station and the recharging posts, on a solid, level surface
in a location where there is no risk of explosion, flooding, or impact damage. Follow the
recommendations on how to build the foundation of this manual. Otherwise, there is a risk of
malfunction and even permanent damage.
Never clean the surfaces or the inside of the equipment with abrasive liquids, solvents or cleaning
products that could damage it. Water should not be applied under excessive pressure.
Disconnect the input power in case the equipment gets damaged.
Otherwise, it could result in a secondary accident or a fire.
Do not allow lint, paper, wood chips, dust, metallic chips, or other foreign matter into
the equipment. Otherwise, a fire or an accident could occur.
After the input power is applied or removed, the equipment will remain hot for a few
minutes. Touching internal hot parts could result in skin burns
IMPORTANT RECOMMENDATIONS FOR CHARGING ELECTRIC VEHICLES:
CAUTION
Follow at all times the charging process described by the electric vehicle manufacturer.
This device should be monitored when used near children.
Do not handle the vehicle or equipment during the loading process (washing of the vehicle,
intervention in the vehicle engine compartment, handling of the loading post, etc.).
Do not modify or interfere with the electrical installation while charging the vehicle.
Failure to do so could result in electric shock.
Do not charge the vehicle in the event of water, signs of corrosion or foreign matter on the charger
cable connector or vehicle charging socket. Otherwise, there is a risk of fire and electric shock.
Do not attempt to touch the terminals of the charging station connector cable or the vehicle
charger socket, nor insert objects into them. Failure to do so could result in electric shock.
Do not attempt to disassemble, repair, alter or modify the charging connector or any part of the
charger. The connector is not a user-serviceable device. Contact Power Electronics.
Always be careful with the charger's cable and connector: treat it carefully, do not crush it,
immerse it in water, pull it out, or hit it, etc.
Follow the directions given by the vehicle manufacturer regarding the suitability of charging the
vehicle when you or the vehicle are exposed to intense rain, heavy electrical storm, or other severe
weather.

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SAFETY INSTRUCTIONS
PERSONAL PROTECTIVE EQUIPMENT (PPE from now on) REQUIRED
The use of PPE in accordance with standards is required to repair and maintain the equipment. Follow
applicable instructions at the installation site to comply with national and local regulations.
In the case of tasks with voltage present, it is mandatory to use an Electric Arc Safety Kit (gloves,
clothing and face protection).
A detailed example of the PPE used is shown below. The customer must specify in his safety
instructions (hazard statement and work procedure) which PPE is required and when and how they
should be used according to his electric arc studies, the characteristics of the site, the chargers, the
installation and the country.
Power Electronics assumes no liability for damage resulting from improper use of the equipment
or failure to comply with local or national regulations.
Always follow local regulations / NEC Health & Safety standards.
The following table shows an example of commonly used PPE:
PPE FOR INSTALLATION
Mechanical gloves
Safety boots
Safety helmet
Safety glasses
Additional PPE for commissioning and maintenance tasks
Safety clothes according to NFPA-70E and safety labels
ITEM
DESCRIPTION
Safety glasses
Eye protection according EN 166.
Electric gloves
Gloves with mechanical, dielectric and against arc flash.
Class according to voltage.
EN 60903; ASTM D120 specifications and NFPA 70E standards.
Safety footwear
S3 class complying with BS EN ISO 20345.
Insulation carpet
Isolation carpet according to IEC 61111
Class according to voltage.
Safety kit arc flash
Arc flash personal protective equipment kit (including arc flash
protective face shield & hard hat), fire resistant 40 cal/cm2.
Padlock set
Padlock and auxiliary elements set to lock out dangerous equipment.
HI-VIS vest
Fr VIS vest 9 cal/cm2.
MV stool
Medium Voltage insulation stool.
Rescue pole
Insulated body rescue pole.

POWER ELECTRONICS
NB 120
SAFETY INSTRUCTIONS
13
The following table shows the protection class type, depending on the working voltage.
ELECTRICAL INSULATED GLOVES
Class
AC (VAC)
DC (VDC)
00
500
750
0
1000
1500
1
7500
11250
2
17000
25500
3
26500
39750
4
36000
54000
ELECTRICAL SAFETY MATTING
Class
AC (VAC)
DC (VDC)
0
1000
1500
1
7500
11250
2
17000
25500
3
26500
39750
4
36000
54000
NOTICE
PPE should be checked according to the manufacturer's instructions.
The electrical gloves must have thermal, electric and mechanical protection. Some models of gloves have
the three kinds of protection, so it is not necessary to combine them with more gloves.
If the gloves only have dielectric protection, it is mandatory to use under fireproof gloves and over gloves
cover.

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SAFETY INSTRUCTIONS
NOTICE
RECEPTION
•Electric vehicle chargers are supplied after passing strict performance tests and are carefully
packed for shipment.
•In case of damage to the unit during transportation, notify the shipping agency and Power
Electronics (International [phone], USA + 1-415-874-3668) or your nearest agent
within 24 hours of receipt of the merchandise.
RECYCLING
Packaging equipment must be recycled. Separate all different materials (plastic, paper, cardboard, wood…)
and place them in the corresponding containers. Ensure waste collection is properly managed with a Non-
Hazardous Waste Agent.
To guarantee health and natural environmental sources protection, the European Union has
adopted the WEEE directive concerning discarded electric and electronic equipment (SEEA).
Waste of electrical and electronic equipment (WEEE) must be collected selectively for
proper environmental management.
Our products contain electronic cards, capacitors and other electronic devices that should be
separated when they are no longer functional. These WEEEs should be managed accordingly
with a Hazardous Waste Agent.
Power Electronics promotes good environmental practices and recommends that all its products
sold outside of the European Union, once they reach the end of their life, are separated and the
WEEE managed according to the particular country applicable legislation (especially: electronic
cards, capacitors and other electronic devices).
If you have any questions about the electric and electronic equipment waste, please contact Power
Electronics.
NOTICE
CYBERSECURITY DISCLAIMER
This product is designed to be connected to and to communicate information and data via a network
interface. Access to the system is restricted to those employees who legitimately need it for reasons of
maintenance and/or updating of the system.
It is the customer´s sole responsibility for providing and continuously ensuring a secure connection between
the product and customer network or any other network (as the case may be). Customer shall establish and
maintain any appropriate measures (such as but not limited to the installation of firewalls, application of
authentication measures, encryption of data, installation of antivirus programs, etc.) to protect the product,
the network, its system and the interface against any kind of security breaches, unauthorized access,
interference, intrusion, leakage and/or theft of data or information.
Power Electronics and its affiliates are not liable for damages and/or losses related to such security
breaches, any unauthorized access, interference, intrusion, leakage and/or theft of data or information.

POWER ELECTRONICS
NB 120
TORQUE AND SCREW SIZING
15
TORQUE AND SCREW SIZING
The following table shows, broadly speaking, the recommended torque for both mechanical and electrical
connections, applicable to all cabinets [
1
,
2
].
SCREW SIZE
RECOMMENDED TORQUE
METRIC
(mm)
ENGLISH
(in.)
DIN (Nm)
ASTM (ft*lb)
6,9 QUALITY[a]
8,8 QUALITY[a]
A449 TYPE 1[a]
A325 TYPE 1[a]
M3
1/8
1
1,3
-
-
M4
5/32
2,5
3
M5
3/16
4
6
M6
1/4
5
10
4
M8
5/16
20
25
9
M10
7/16
40
50
25
M12
1/2
60
70
38
50 –58
M14
9/16
100
120
54
-
M16
5/8
150
210
75
99 –120
[a] For other qualities, follow the screw’s manufacturer guidelines.
CAUTION
For all screwing that holds a particular component such as a bus, contactor, etc. it will be necessary to
apply the tightening torque indicated by the manufacturer of the same component
Screwing should be tightened correctly only when necessary, i.e. whenthe factorymarks are not in place.
For small screws that do not have marks, the good electrical praxis will determine if it is loose.
1
Power Electronics recommends the use of Zinc Steel quality 8.8 bolts for internal connections in general, DC and
earth connections included.
2
Power Electronics recommends the use of A2-70 stainless bolts for external connections in general, AC connections
included.

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INTRODUCTION
INTRODUCTION
Power Electronics’ NB 120 standalone manages both the power transformation and main control for the
charge, and the user interface and connection with the EV at the same enclosure.
The equipment integrates a built-in cable management system that allow five meters long charging cables
without them dragging on the ground.
Long charging cables and convenient handling has become a must for EV drivers while the preservation
of both cables and plugs is key to charging point owners.
The charger can be easily power-scalable adding power modules to support EV fleets growth or to follow
the increase in EV market size over time.
The power modules, FRU concept (Field Replaceable Units), are designed to be easily replaceable on the
field without the need of advanced technical service personnel providing an easy and reduced
maintenance with low operating costs.
Thanks to the smart fleet management functionality, the available power can be shared among all
connected vehicles at an EV charging site. So the total power required to supply the energy gets
substantially reduced, representing a cost savings due to reduced grid interconnect requirements.
The charger offers a fast DC charging (mode 4 of charging) up to 120 kW, ideal for installation in electric
cars charging stations, commercial car parks and business areas; or optionally for IEC standard, a semi-
fast charge in AC (mode 3 of charging) up to 22 kW.
The charger has up to two independent hoses with the standard connectors: CCS-1, CCS-2, CHAdeMO
in DC mode being compatible with electric vehicle standards. Optionally, for IEC standard, a type 2 socket
is available for AC charging. User can charge three cars at the same time, as long as they are on different
charging modes.
1

POWER ELECTRONICS
NB 120
INTRODUCTION
17
Equipment overview
The following sections describe the different components of the EV charger.
Charger
The NB 120 series charger can be provided with two independent hoses with connectors for DC
charging of electric vehicles with CCS-1, CCS-2 and CHAdeMO standards for DC. In addition, it can
optionally include a type 2 socket for AC charging. The possible installation and combination of
connectors depends on the application of local regulations. Each post has a user-interactive touch
screen display and an optional RFID card reader to be used when carrying out a charging session. The
following image shows the charger main components:
Connectors
Display
Charging hose
RFID card reader
Charging hose
Connector
Connector

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POWER ELECTRONICS
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INTRODUCTION
Connectors
The charger has up to two independent cable straight hoses with the standard connectors. The
possibility of installing and combining the connectors depends on which regulations are applied in each
country and the interest in offering different options to the users.
The connector brackets are located on each side of the equipment.
The following sections describe the parts of each type of connector. Be aware that the shape of the
connectors may vary from those listed below.
CCS-1 connector
CCS-2 connector
CHAdeMO connector
Locking system
Handle grip
Handle grip
Locking system
Handle grip
Locking system

POWER ELECTRONICS
NB 120
INTRODUCTION
19
AC connector type 2
Charging process
The user must follow the instructions given below when performing a charging session:
1. If the charger is available, activate the charging session from the display, RFID contact or mobile
App (depending on available options).
2. Select the corresponding connector referred to the expected charge mode.
3. Connect the charger to the EV using the corresponding hose.
4. Ensure that the connector has been interlocked.
5. If the session and communication between the charger and vehicle are established correctly, the
charging process will begin.
6. Stop charging. The charging can be stopped in different ways: when it has reached 100% and it
stops automatically, through the display touching on the “Stop session” button, by RFID contact,
through the mobile application or by stopping the charging from the vehicle itself.
7. Once the charging has stopped, the connector can be released.
Locking system
Handle grip

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POWER ELECTRONICS
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INTRODUCTION
Advanced charge functionality
Smart Fleet Management
This functionality has been designed to minimize the initial investment and operation costs.
It is able to balance the power based on the number of charging posts in use. Therefore, thetotal power
required to supply the total energy gets substantially reduced, representing a cost reduction in the
electrical facility infrastructure and a cost saving due to a minor power contracted. Besides, the
hardware and the back-office communication are optimized.
Smart power balance technology (optional)
With the smart power balance functionality, NB 120 is able to dynamically allocate power modules
depending on the power demand of each vehicle.
This functionality optimizes the use of the total power of the charger and therefore the investment.
Simultaneous charging
The NB 120 is designed for maximum revenue from a single charger. Allows working with voltage
ranges between 150 Vdc and 1000 Vdc and can work between 300 Vdc and 1000 Vdc at maximum
power.
IEC standard
Each charger can install up to two connectors per post, allowing the simultaneous charging of two
vehicles in DC. Optionally, an AC socket can be included, for an AC charge. The charger is compatible
with the most extended connectors for DC charging (CCS, CHAdeMO) and AC.
US standard
Each charger can install up to two connectors per post, allowing the simultaneous charging of two
vehicles in DC. The charger is compatible with the most extended connectors for DC charging (CCS,
CHAdeMO).
Open door detection
Door contact switches are used in order to recognize if the front access door of the power cabinet is
open. If it is detected that the door is open, ongoing charging sessions will be immediately stopped.
WARNING
The power cabinet door must be correctly locked after installation, service or repair operations.