Download Electronic Systems Protection Electronic Systems Protection

Electronic Systems
Systems Protection
Protection
Electronic
Equipotential bonding
bonding and
and transient
Equipotential
overvoltage surge
surge protection
protection
overvoltage
Company overview
Our reach and expertise
With over 120 years of experience Furse provides world leading
Earthing, Lightning and Electronic Systems Protection solutions.
From our own designed and manufactured products, through to
risk assessment and systems design advice. Furse provide its
renowed total solution for earthing & lightning protection.
By bringing together complimentary Furse products, ABB now offer
a wider range of electronic systems protection solutions.
Our exhaustive range of equipotential bonding and transient
overvoltage SPDs provide fully coordinated protection against
transient overvoltages on all incoming and outgoing metallic
service lines including power, data, signal & telecoms.
––
––
––
––
Lightning Equipotential Bonding SPDs
Mains power transient overvoltage SPDs
Data, signal & telecommunication line SPDs
DC power & photovoltaic SPDs
Expertise
Specialist advice from our fully qualified
technical engineers - focusing on your
lightning and surge protection issues
and concerns.
Experience
Experience to provide the optimum
design - one that doesn’t use more material
than is necessary, saving you money.
Knowledge
Our knowledge of the latest standards
and systems ensures a tailored design
that can be installed using the most
appropriate and up-to-date products.
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1 Datacentres | 2 Trackside substations | 3 Wind farms | 4 Oil & Gas | 5 Water treatment
6 Telecommunications | 7 Healthcare | 8 Substations
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Electronic Systems Protection | Design & technical solutions
Electronic Systems Protection
Surge Protection now included in BS 7671
The latest amendment to the IET Wiring Regulations 17th Edition (BS 7671) brings
into sharp focus the need to protect sensitive and critical electronic systems
against transient overvoltages (surges).
Amendment 1 of BS 7671, effective from 1st January 2012,
requires all electrical system designs and installations to be
assessed against risk of transient overvoltages of atmospheric
origin, or from switching events, in line with its Sections 443 &
534. Section 443 defines the criteria for risk assessment,
whereas Section 534 describes the selection and installation
of suitable Surge Protective Devices (SPDs), where required,
for effective transient overvoltage protection.
Why is transient overvoltage protection so important?
Transient overvoltages are short duration surges in voltage
between two or more conductors (L-PE, L-N or N-PE), which
can reach up to 6 kV on 230 Vac power lines, and generally
result from:
Outright damage to sensitive electronic systems, such as
computers etc, occurs when transient overvoltages between
L-PE or N-PE exceed the withstand voltage of the electrical
equipment (i.e. above 1.5 kV for Category I equipment to BS
7671 Tables 44.3 & 44.4).
Atmospheric origin (lightning activity) through resistive (see
Figure 1) or inductive coupling and/or Electrical switching of
inductive loads.
Equipment damage leads to unexpected failures and
expensive downtime, or risk of fire/electric shock due to
flashover, if insulation breaks down.
Transient overvoltages significantly damage and degrade
electronic systems.
Figure 1: Resistive coupling
Figure 2: Equipment risk
DAMAGE
DAMAGE
Degradation
> 1.5DAMAGE
kV
(L-PE/N-PE)
Safe Operating Area
Degradation
Degradation
Safe Operating A
> 2x peak
operating voltage
(e.g. 715 V L-N)
Safe
Operating
Area
Degradation
DAMAGE
Nominal
system
voltage
Degradation
(e.g. 230 V)
DAMAGE
Protect additional metallic services
For protection measures against direct lightning strikes, and
against transient overvoltages on additional metallic service
lines (e.g. data, signal & telecoms), BS 7671 refers to
BS EN 62305 (534.1 NOTE 2).
Full protection of electronic systems can only be achieved if
all incoming/outgoing metallic services, including data, signal
and telecoms lines are protected.
Data/
Telecom
Power
IMPORTANT:
Equipment is ONLY protected
against transient overvoltages
if all incoming / outgoing mains
and data lines have protection
fitted.
Electronic Systems Protection | Design & technical solutions
3
Furse Electronic Systems Protection
Enhanced Solutions to BS EN 62305 / BS 7671
Furse Surge Protective Devices are widely specified and offer industry-leading voltage protection levels to ensure the
continuous operation of critical electronic systems, such as those found in data centres, hospitals and automated process
control. Used with Furse data / telecom SPDs, they form part of a complete lightning protection solution.
Protection for 230/400 V TN-S or TN-C-S supplies
–– No external lightning
– – No external lightning
–– External lightning
– – External lightning
protection system fitted
protection system fitted
protection system fitted
protection system fitted
–– Underground mains
– – Exposed overhead mains
–– Multiple connected
– – No. of services
No external
No external
lightning
No external
No external
lightning
External
External
lightning
lightning
protection
protection
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lightning
protection
protection
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lightning
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external
lightning
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lightning
protection
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lightning
protection
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external
lightning
Nolightning
external
lightning
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lightning
protection External
External
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protection
supply
feed
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metallic
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Protection
Protection
forfor
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V TN‐S
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or or
TN‐C‐S
TN‐C‐S
supplies
supplies
Protection
for
230/400
VV TN‐S
or
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supplies
Protection
for
230/400
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or
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supplies
Underground
Underground
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supply
supply
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overhead
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Ground GroundGround
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Ground GroundGround
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Level Level Level
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{ { {{
Unknown
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3 Phase 400 V
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after electricity
meter (Main
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Protection for data signal and telecoms applications
4
Electronic Systems Protection | Design & technical solutions
ESP MC
ESP MC
ESP
ESPMC
MC
ESP MC/TN/RJ11
ESP MC/TN/RJ11
(e.g. for
(e.g.
fax
for
machines)
fax
machines)
ESP
(e.g.
for
fax
ESPMC/TN/RJ11
MC/TN/RJ11
(e.g.
for
faxmachines)
machines)
MC
ESP MC/Cat‐5e
ESP MC/Cat‐5e
(e.g.
for
(e.g.
servers)
for
servers)
ESP
(e.g.
for
ESPMC/Cat‐5e
MC/Cat‐5e
(e.g.
forservers)
servers)
ESP
ESP MC/TN/RJ11 (e.g. for fax machines)
ESP MC/Cat-5e (e.g. for servers)
ABB LV Panel SPDs
Commercial, Industrial & Domestic Installations
ABB’s wide range of mains SPDs compliment the power DIN-rail product range,
providing protection to the electrical installation at any point in the mains distribution
system.
Main section board
OVR T1+2 3N 15-255-7 surge protective device – TNS/TT 230/400V
3Ph+N networks
Type 1+2 ABB surge protective devices have a high impulse current
(10/350 waveform) withstand capacity whilst ensuring a low (better)
voltage protection level (Up).
– – Multi-mode protection
– – End of life SPD visual indicator
– – DIN rail mounting for quick installation
– – Compact design
Characteristics
COMPACT
COMPACT
COMPACT
COMPACT
SPACE
SPACE
SPACE
SPACE
SAVING
SAVING
SAVING
SAVING
DESIGN
DESIGN
DESIGN
DESIGN
SPACE
SPACE
SAVING
SAVING
DESIGN
DESIGN
SPACE
SAVING
DESIGN
IEC 61643-11
EN 61643-11
IEC 61643-11
EN 61643-11
SPACE
IECIEC
61643-11
61643-11
SAVING
EN EN
61643-11
61643-11
RES
ON
RESRES
ON ON
DESIGN
AUXILIARY
CONTACT
RES ON
OVR Plus N3 40 self-protected surge protective device - TNS/TT
230V/400V 3Ph+N networks
COMPACT
COMPACT
Self-protected with integral
backup
breaker
offering
✓
✓
limp miniature circuit
limp
ALARM
Imax
40 kA
15 kAdevice (OCPD) fully
15 kA coordinated with
dedicated over current protection
the surge protective device.
– – Multi-mode protection
– – DIN rail mounting for quick installation
– – High reliability
– – Innovative, weld-free safe thermal disconnection sensor
– – Fully compatible with the complete ABB pro M modular range
SPACE
SAVING
DESIGN
SPACE
SAVING
DESIGN
IEC 61643-11
EN 61643-11
RES ON
IEC 61643-11
EN 61643-11
AUXILIARY
CONTACT
Module
SPACE
SAVING
DESIGN
IEC 61643-11
EN 61643-11
RES ON
IEC 61643-11
EN 61643-11
TSTS
Plug-in
✓Plug-in
Plug-in
OCPD
OC
O
ALARM
AUXILIARY
AUXILIARY IEC 61643-11
Module
INTEGRATED
Module
Module
CONTACT
CONTACT EN 61643-11
RES INTE
ONIN
OCPD
INTEGRATED
Characteristics
TS
Plug-in
limp
ALARM limp
Imax
COMPACT
COMPACT
SPACE
SPACE
AUXILIARY
SAVING
SAVING
RES ON
CONTACT
DESIGN
DESIGN
kAkA
15 Module
kA4015
Consumer units – Domestic/Residential
Characteristics
OVR Plus N1 20 self-protected surge protective device - TNS/TT 230 V
COMPACT
COMPACT
COMPACT
COMPACT
1Ph+N networks
TS
✓
✓
Plug-in
limp
limp
limp
ALARM
Imax
ALARM limp
Imax
40
kA
kAkA
15
kA
15
kA
15 kA2015
Self-protected with integral backup miniature circuit breaker offering
dedicated over current protection device (OCPD) fully coordinated with
– – Multi-mode protection
– – DIN rail mounting for quick installation
– – Fully coordinated unit for optimised installation and simplified wiring
– – High reliability
– – Innovative, weld-free safe thermal disconnection sensor
– – Compact design
SPACE
SAVING
DESIGN
IECIEC
61643-11
IEC
61643-11
IEC
61643-11
61643-11
EN 61643-11
EN EN
61643-11
EN
61643-11
61643-11 RESRES
ON
RE
O
15 15
kA15
kA15
kAkA
Characteristics
Sub-distribution board
OVR T2 3N 40 275s P TS surge protective device - TNS/TT 230/400V
COMPACT
COMPACT
COMPACT
3Ph+N networks
TS
✓
✓✓ COMPACT
limp
limp
limp
ALARM
Imax
ALARM
ALARM limp
Imax
Imax
40 kA
kAkA
15
kA
15
15
kA
kA
15 kA4040
Type 2 surge protective devices are designed to protect electrical
installations and sensitive equipment against indirect surge currents
COMPACT
TS
✓
Plug-in
limp
– – Multi-mode protection
ALARM
Imax
40 kA
15 kA
– – End of life SPD visual indicator
– – Plug-in cartridge
– – DIN rail mounting for quick installation
– – Auxiliary contact TS for remote status indication
SPACE
SAVING
DESIGN
✓✓✓✓ ALARM
ALAR
ALA
A
limp
limp
limp
limp
SPACE
SPACE
AUXILIARY
SAVING
SAVING
RES ON
CONTACT
DESIGN
DESIGN
Module
TS
OCPD
AUXILIARY
INTEGRATED
CONTACT
TS
OCPD
AUXILIARY
INTEGRATED
CONTACT
✓Plug-in
✓ ALARM
OC
A
IEC 61643-11
IEC 61643-11
Module
EN 61643-11
EN 61643-11 RES INTE
ON
✓Plug-in
✓ ALARM
OC
A
IEC 61643-11
IEC 61643-11
MODULE
EN 61643-11
EN 61643-11 RES INTE
ON
Electronic Systems Protection | Design & technical solutions
5
Enhanced Total Solution
Compliance to BS EN 62305 / BS 7671
BS 7671 Section 534 focuses guidance on selection and installation of SPDs to
limit transient overvoltages on the AC power supply.
BS 7671 Section 443 states that‚ transient overvoltages
transmitted by the supply distribution system are not
significantly attenuated downstream in most installations
(443.1.1 NOTE 3).
The illustration demonstrates how effective protection
comprises a service entrance SPD to divert high energy
lightning currents to earth, followed by downstream SPDs at
appropriate points to protect sensitive and critical equipment.
BS 7671 Section 534 therefore recommends that SPDs are
installed at key locations in the electrical system:
Selecting appropriate SPDs
SPDs are classified by Type within BS 7671 (534.2.1),
following the criteria established in BS EN/IEC 62305.
–– As close as practicable to the origin of the installation
(usually in the main distribution board after the meter)
(534.2.1)
Where a building includes a structural LPS, or connected
overhead metallic services at risk from a direct lightning strike,
equipotential bonding SPDs (Type 1 or Combined Type 1+2)
must be installed at the service entrance, to remove risk of
flashover (534.2.3.4.2).
–– As close as practicable to sensitive equipment
(sub-distribution level), and local to critical equipment
(534.2.1)
Figure 3 shows a typical installation on a 230/400 V TN-C-S/
TN-S system using Furse SPDs, to meet the requirements of
BS 7671.
Installation of Type 1 SPDs alone however does not provide
protection to electronic systems (534.2.1 NOTE 3).
Figure 3: Typical installation on a 230/400 V TN-C-S/TN-S system, using Furse SPDs, to meet the requirements of BS 7671.
Service entrance/
Main distribution board
L1
OCPD
Sub-distribution board
Terminal equipment
Line
length
> 10 m
L1
L2
L2
L3
L3
N
Line
length
> 10 m
N
PEN
PE
OCPD
OCPD
Risk of
switching
transient
L1
L2
L3
If RED replace
N
L
L'
L2
L2'
L3
L3'
N
N'
250 AgL
PATENT
APPLIED
FOR
ESP 415/I/TNS
Enhanced Mains Protector
EN/IEC 61643
Enhanced
Mains
Protector
limp = 25kA/mode
lmax = 100kA/mode
ln = 25kA/mode
Uc = 320VAC
Up < 1.4kV
Ures(limp) < 1.3kV
PE
14
11
12
STATUS
ESP 415/I/TNS
Type 1+2 SPD
ESP 415 D1/LCD Full Mode
Type 1+2+3 SPD
Critical equipment
(e.g. hospital
equipment)
Fixed equipment
(e.g. UPS)
Main earthing terminal
ESP 415/I/TNS with Type 1
performance installed at
service entrance to divert
high energy lightning
currents to earth, and
remove risk of flashover.
6
OCPD : Overcurrent protective device
(eg. fuse MCB)
Electronic Systems Protection | Design & technical solutions
ESP 415 D1/LCD with Type 2
performance installed at subdistribution protects fixed
equipment on the electrical
installation against transient
overvoltages.
Combined Type 2+3
performance of the SPD
installed at sub-distribution
protects downstream
sensitive equipment against
transient overvoltages.
Plug-in ESP MC with Type 3
performance protects critical
equipment at local level
against switching transients.
Enhanced Total Solution
Lightning Protection Zone (LPZ) Concept
The Lightning Protection Zone (LPZ) concept was introduced in BS EN 62305,
particularly to assist in determining the Surge Protection Measures (SPM) required
within a structure.
The general principle is that the equipment requiring
protection should be located in an LPZ whose
electromagnetic characteristics are compatible with the
equipment stress withstand or immunity capability.
In general, the higher the number of the zone (LPZ 2; LPZ 3
etc) the lower the electromagnetic effects expected. Typically,
any sensitive electronic equipment should be located in higher
numbered LPZs and be protected by its relevant SPM.
Figure 4: LPZ defined by protection measures
S1 Flash to the
structure
LPZ 0A
S3 Flash to a line
connected to
the structure
LPZ 0B
SPD 0/1
Equipotential
bonding by
means of SPD
Safety distance
against too high
a magnetic field
ds
SPD 0/1
LPZ 1
Rolling sphere
radius
S4 Flash near a
line connected
to the structure
Rolling sphere
radius
ds
SPD 1/2
SPD 1/2
LPZ 0B
S2 Flash near
to the
structure
LPZ 2
LPZ 0B
Ground level
SPD 0/1
Electronic Systems Protection | Design & technical solutions
7
Fusing and Installation of SPDs
Transient overvoltage protection to BS 7671
Critical length of connecting conductors
An installed SPD will always present a higher let through
voltage to equipment compared with the voltage protection
level (Up) stated on a manufacturer’s data sheet, due to
additive inductive voltage drops across the conductors on the
SPD’s connecting leads.
Therefore, for maximum transient overvoltage protection the
SPDs connecting conductors must be kept as short as
possible.
BS 7671 Clause 534.2.9 defines that for SPDs installed in
parallel (shunt), the total lead length between line conductors,
protective conductor and SPD preferably should not exceed
0.5 m and never exceed 1 m. Current loops should be
avoided.
Best practice
Poor installation can significantly reduce effectiveness of
SPDs. Therefore, keeping connecting leads as short as
possible is vital to maximize performance, and minimize
additive inductive voltages.
Best practice cabling techniques, such as binding together
connecting leads over as much of their length as possible,
using cable ties or spiral wrap, is highly effective in cancelling
inductance.
The combination of an SPD with low voltage protection level
(Up), and short, tightly bound connecting leads will lead to an
optimum controlled installation meeting the requirements of
BS 7671.
For SPDs installed in-line (series), the lead length between the
protective conductor and SPD preferably should not exceed
0.5 m and never exceed 1 m.
Figure 5: Total lead length for SPDs installed in parallel
OCPD
< 0.25 m
OCPD
SPD
L
PATENT
APPLIED
FOR
L1
N
ESP 240D1
L
Uc 280Vac 47-63Hz
EN/IEC 61643
N1
125 AgL
STATUS INDICATION
N
GREEN FULL PROTECTION
GREEN & RED
RED
REDUCED
PROTECTION
(replace unit)
NO PROTECTION
WARNING: If lit /
flashing disconnect
unit & check Neutral
to Earth voltage
T1 Iimp 4kA
B
In 20kA
T2 Imax 40kA C
T3 Uoc 6kV D
!
14
11
12
STA
STATUS
TATUS
Main earthing
terminal or
connecting
conductor bar
< 0.25 m
Multiple terminal
equipment protected
by SPD at sub-distribution
SPD connections should be kept as short as possible, ideally below 0.25 m between SPD, live conductors & earth, but in any case not more than 0.5 m, to reduce
risk of additive inductive voltage drops across the conductors.
8
Electronic Systems Protection | Design & technical solutions
Cross-sectional area of connecting conductors
Following BS 7671, the cross-sectional area of the SPD’s
connecting conductors shall be:
– – Not less than 4 mm2 copper (or equivalent) if the crosssectional area of the line conductors is greater than or
equal to 4 mm 2, or
–– Not less than that of the line conductors, where the line
conductors have a cross-sectional area less than 4 mm2
– – For Type 1 SPDs, a minimum of 16 mm2 copper or
equivalent, where a structural LPS is installed
BS 7671 defines requirements to ensure that fault protection
shall remain effective in the protected installation even in the
case of failure of SPDs.
These cross-sectional area values are based on the
surge current that these SPD connecting leads need to
handle, not the supply current.
Selection of the appropriate OCPD in-line with the SPD must
ensure sufficient discrimination with the upstream OCPD of
the main supply load. Installers should refer to OCPD
manufacturers’ operating characteristics to ensure
discrimination, particularly where an installation includes a
mixture of types of OCPD.
However, in the event of a short circuit, for example
due to the end of life condition of the SPD, the connecting
leads to the SPD would need to be protected by a suitable
Overcurrent Protective Device (OCPD).
Therefore an SPD needs to be protected against short circuits
through the use of an appropriate OCPD capable of
eliminating the short-circuit. In effect, the SPD should have a
dedicated OCPD installed in-line on its connecting leads,
ensuring that this OCPD to the SPD discriminates with the
upstream OCPD of the main supply.
However, as a general rule of thumb, the OCPD for the SPD
should be rated at approximately half the value of the
upstream supply OCPD.
ABB surge solutions
Furse Electronic Systems Protection
Furse Part No
ABB Order Code
ABB MCB Part No*ABB Fuse Part No*
ESP 415/I/TNS
7TCA085460R0101
S8035 - 125 E 933N/125 - 125 A
ESP 415/III/TNS
7TCA085460R0103
S8035 - 125
E 933N/125 - 125 A
ESP 415 M4
7TCA085460R0124
S8035 - 125 E 933N/125 - 125 A
ESP 415 M2
7TCA085460R0119
S8035 - 125
E 933N/125 - 125 A
ESP 415 M17TCA085460R0112
S203P – 50 NA
E 933N/50 - 50 A
ESP 415 D1
7TCA085460R0105
S203P – 50 NA
E 933N/50 - 50 A
ABB Part No
ABB Order Code
ABB MCB Part No*ABB Fuse Part No*
OVR T1+2 3N 15-255-7
2CTB815101R9000
S8035 - 125
E 933N/125 - 125 A
OVR T2 3N 40 275s P TS
2CTB803395R0200
S203P - 50 NA
OVR Plus N3 40
2CTB803701R0300N/A
E 933N/50 - 50 A
N/A
OVR Plus N1 202CTB803701R0700N/A
N/A
*Maximum MCB/fuse ratings must be in accordance with the installation to follow coordination rules with main or upstream short circuit protection.
Other products to consider
ESP SL Series
ESP Cat 6 Series
ESP TN/JP Series
For protection of twisted
pair signalling applications
For protection of local area networks up to
Cat 6 including Power over Ethernet (PoE)
For protection of equipment connected
to BT telephone (BS 6312) socket
Electronic Systems Protection | Design & technical solutions
9
The next MCB generation System pro M compact®
Uncompromising safety and comfort
For over 120 years ABB have been supplying advanced MCBs. Today ABB offer
MCB solutions for all kinds of applications, developed in close touch with market
requirements.
Worldwide approved S 200 / S 200 M meet all international
standards
The next generation MCB S 200 / S 200 M product range
provides highest safety solutions for the installer according
to all relevant standards worldwide. Our products are tested
acc to: IEC 60898-1, IEC 60947-2, UL 1077, CSA 22.2
No. 235.
Miniature circuit breakers (MCBs) applications
Our circuit breakers are available in various configurations to
meet the requirements of different applications. So you don’t
have to mix up different systems and can rely on the proven
System pro M compact® in every situation. They are
selectively switchable, even under load, in case of a fault or
for maintenance purposes. The MCB guarantees constant
tripping-characteristics over its entire lifetime.
10
Electronic Systems Protection | Design & technical solutions
For domestic/residential
installations in defined
markets up to 6 kA breaking
capacity 3 / 4,5 / 6 kA
Compact Home
SH 200 T, SH 200 L,
SH 200
For domestic or small
commercial installations up
to 10 kA breaking capacity
pro M compact S200,
S200S, S200 M
For industrial installations up
to 25 kA breaking capacity
pro M compact S200,
S200M, S200P, S200U,
S200UP, S200UDC
S280UC, S290
For commercial and
industrial applications with
high breaking capacities and
special features /
accessories
S200P, S220, S290
S500, S800
Special selective MCB
(SMCB) with dedicated
upstream and downstream
selectivity are available in the
ranges
S700
S750
ABB Low voltage products division
Business units
ABB has a reputation for manufacturing and supplying quality low voltage
components, the result of our on-going research and development programme.
Breakers & switches
– – Circuit breakers
–– Switches
–– Fusegear & cable distribution
cabinets
Wiring accessories
– – Wiring accessories
– – Industrial plugs & sockets
– – Door entry systems
– – Intelligent building control (KNX)
Control products
– – Control & protection
–– Electronic products & relays
–– Connection
–– Jokab safety products
LV Systems
– – MNS conventional switchgear
– – MNS intelligent switchgear
– – MNS integrated switchgear
Enclosures & DIN-Rail
– – Modular DIN-Rail products
– – Enclosures & cable systems
– – Furse Surge Protection
Cabling & wiring
– – Power connectivity & control
– – Wire & cable management
– – Cable protection systems
– – Safety technology
Electronic Systems Protection | Design & technical solutions
11
Furse
UK Head Office
Wilford Road
Nottingham NG2 1EB
United Kingdom
Tel: +44 (0) 115 964 3736
E-Mail: [email protected]
Note: We reserve the right to make technical changes or modify
the contents of this document without prior notice. With regard to
purchase orders, the agreed particulars shall prevail. ABB AG does
not accept any responsibility whatsoever for potential errors or
possible lack of information in this document.
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Copyright © 2014 ABB
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We reserve all rights in this document and in the subject matter
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© Copyright ABB. 04/2014 9AKK106103A4730
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