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
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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
POWER ELECTRONICS
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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
POWER ELECTRONICS
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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.