SAFE
®
Technology
NO BACK-UP FUSE NEEDED
NO LEAKAGE CURRENT
TOV IMMUNITY
UP TO 20 YEARS WARRANTY
CONTROLLED DISCONNECTION
BE ON THE SAFE SIDE
®
SAFE
Technology
ALL IN ONE TECHNOLOGY
OUR TECHNOLOGY
KNOWN SOLUTIONS
RCB
MCB
FUSE
GDT
MOV
TOVs
Transition of the MOV into the very low-ohmic state.
This results in the destruction of the MOV, and the
surge arrester needs to be replaced. When the
device reaches this state, over current protection or
disconnector should be activated, but many times
they are not.
TC(G) limits the follow-up current when MOV starts
to conduct. No damage on SPD, no service costs
needed.
Disconnection
Disconnector soldered too far from MOV. The
temperature rises too slow on the part where it is
soldered. That is why the reaction can be too slow
when MOV conducts.
Controlled disconnection by TC(G) with prompt
reaction time.
ARC
Disconnector has no possibility to prevent arc (too
short disconnection distance).
Patented rotating barrier which prevents any arc.
Follow-up (leakage) current
Standard solution is a series connection of GDT and
MOV. Its disadvantage is worse protection level.
TC(G) solution provides SPD with no follow-up
(leakage) current and keeps good protection level.
Nominal voltage of MOV
To prevent damage of SPD in the case of TOV some
producers uses MOVs with higher nominal voltage.
This has also bad influence on protection level.
No need for rising nominal voltage.
Back-up fuse
Needed (external or integrated).
No back-up fuse needed.
®
SAFE
Technology
SAFETEC TC(G)
SHORT DURATION PATH
A circuit, enclosed by GDT and MOV, functions as overvoltage protection
in transient overvoltages or voltage surges, characterized by a swift
increase of current and voltage in a relatively short period of time.
Typical transient overvoltages are caused by e.g. switching operations,
direct and indirect atmospheric discharges.
TC(G)
GDT
LONG DURATION PATH
The second circuit consists of the advanced TC(G) technology.
MOV
The elements are activated in the event of increased voltage, if the
voltage exceeds the declared rated voltage between the arrester's
terminals. Functions of the elements involved in this second circuit:
TRANSIENT
TOV
(SHORT DURATION)
(LONG DURATION)
Enables and creates a dynamic voltage drop, which is needed for
the activation of GDT in the branch taking part in transient
voltage events.
A function to galvanically separate the MOV from the supply
voltage. As already mentioned, it is the leakage current that
causes the more intense ageing and degradation of the basic
varistor parameters. By fitting this element in the process of
serial production it can be achieved that MOV is actually
activated solely in transient overvoltage events.
W
E
N
Limit the current through the MOV, if the voltage is increased
above the arrester's declared rated voltage. The value of the
TC(G) current limiter, ensuring that the maximum current
through the MOV in the initial state of conductivity is about 1A,
whereas after approx. 40 seconds, a current balance is
established at the level of about 10 mA. The above mentioned
currents do not exceed the MOV's energy capacity, and this is
precisely the solution ensuring that after the voltage surge the
MOV is still functioning.
ROTATING DISCONNECTION
Another important feature is the mechanical design of the product
realized by a special rotating barrier used to quench the electric arc
between the MOV's surface and the thermal disconnection mechanism.
The essential feature of the design is the insulated enclosure covering
the conductive surface that could trigger an electric arc.
OVERLOAD PROTECTION
GDT - gas discharge tube
MOV - metal-oxide varistor
- thermal disconnector
TC-G - circuit
An additional feature, the so-called arrester overload protection, simply
disconnects the surge arrester from the supply voltage when the surge
current value (Imax) is increased above the declared rated value.
SAFE
®
Technology
KEY CHARACTERISTICS
PRODUCT INFORMATION
Voltage range:
AC: 150 - 750 V
DC: 75 - 1500 V
SPD classes:
Class I and II versions (AC, DC)
Short circuit current rating
SCCR: 200 kA
Nominal discharge current per pole:
Class I: 20 and 25 kA versions
Suitable for:
Protection from overvoltages, surges and
transients on the system network
Class II: 20 kA
Maximum discharge current per pole:
Protection against loss of neutral, or loose
neutral connections, which are common
to MEN (Multiple earthed neutral)
systems
Class I: 50 and 100 kA versions
Class II: 40 and 50 kA versions
Impulse current (10/350) per pole
Unstable or poorly regulated power
networks where sustained overvolatges
for some minutes or longer may exist.
Class I: 12.5 and 25 kA versions
Maximum prospective short circuit current (PV)
Iscwpv (MOV) = 1000A
Power supply systems
Iscwpv (SPD) = NO LIMIT up to 1.5 x Uc
All AC/DC applications
UPS systems
Complies with:
UL 1449 Third Edition
PV applications
IEC 61643-1
Wind turbine industry
EN 61643-11
Industrial equipment
prEN 50539-11
Inverters / Converters
UTE C 61-740-51
ROHS
CE
Features:
DIN rail versions
Modular versions (Class II)
IP20 safety rating
Visual indication
Remote control
Easy installation
Up to 20 year warranty
®
SAFE
Technology
CLASS II
According to
Uc
Max. continious
operating voltage
MCOV
In/Imax
Nominal / Max.
Max. continious
operating voltage discharge current (8/20)
Up
VPR
Protection
level
Voltage protection
rating
V(AC/DC)
V(AC)
kA
kV
kV
SAFETEC C(R) 40/150
IEC
150/200
/
20/40
1.0
/
SAFETEC C(R) 50/150
UL
/
150
20/50
/
1.2
SAFETEC C(R) 40/275
IEC
275/350
/
20/40
1.6
/
SAFETEC C(R) 50/277
UL
/
277
20/50
/
1.6
SAFETEC C(R) 50/385
UL
/
385
20/50
/
1.8
SAFETEC C(R) 40/440
IEC
440/580
/
20/40
2.2
/
2.0
SAFETEC C(R) 50/440
UL
/
440
20/50
/
SAFETEC C(R) 50/550
UL
/
550
20/50
/
2.5
SAFETEC C(R) 25/750
UL
/
/
Up
2.5
VPR
UCPV
750
MCOV
Max. PV voltage
10/20
In/Imax
V(DC)
V(DC)
kA
kV
kV
SAFETEC C(R) 75 PV
IEC
75
/
10/40
0.6
/
SAFETEC C(R) 300 PV
IEC
300
/
20/40
1.6
/
SAFETEC C(R) 300 (2+0) PV
UL
/
300
20/50
/
1.5
SAFETEC C(R) 600 PV
IEC
600
/
20/40
2.2
/
SAFETEC C(R) 600 (2+0) PV
UL
/
600
20/50
/
2.0
SAFETEC C(R) 1000 PV
IEC
1000
/
20/30
2.8
/
SAFETEC C(R) 1000 Y PV
IEC
1000
/
20/40
4.0
/
SAFETEC C(R) 1000 (2+0) PV
UL
/
1000
10/20
/
4.0
SAFETEC C(R) 1200 Y PV
IEC
1200
/
20/40
4.4
/
SAFETEC C(R) 1200 (3+0) PV
UL
/
1000
20/50
/
4.0
SAFETEC C(R) 1500 Y PV
IEC
1500
/
20/40
4.8
/
Uc
V(AC/DC)
MCOV
In/Imax
Up
VPR
V(DC)
kA
kV
kV
SAFETEC C(R) 440 (3+0) WT
UL
/
440
20/50
/
2.0
SAFETEC C(R) 690 (3+0) WT
UL
/
690
10/20
/
2.5
SAFETEC C(R) 750 (3+0) WT
UL
/
750
10/20
/
2.5
SAFETEC C(R) 750 (3+0) WT
IEC
750/1000
/
20/30
2.8
/
®
SAFE
Technology
CLASS I
Uc
In/Imax
Iimp
Up
Ures
Max. Continious
operating voltage
Nominal / Max.
discharge current (8/20)
Impulse current
(10/350)
Protection
level
Residual voltage at
Iimp
V(AC/DC)
kA
kA
kV
kV
SAFETEC BS(R) 25/150
150/200
40/80
25
0.7
0.7
SAFETEC BS(R) 25/275
275/350
40/80
25
1.3
1.2
SAFETEC BS(R) 25/440
440/580
UCPV
40/80
In/Imax
25
Iimp
2.0
Up
1.8
Ures
V(DC)
kA
kA
kV
kV
SAFETEC BS(R) 12.5/600 PV
600
20/40
12.5
1.75
1.45
SAFETEC BS(R) 12.5/1000 PV
1000
20/40
12.5
2.6
2.2
SAFETEC BS(R) 12.5/1500 PV
1500
20/40
12.5
2.6
2.2
Uc
In/Imax
Iimp
Up
Ures
V(AC/DC)
kA
kA
kV
kV
SAFETEC BS(R) 12.5/750 WT
750/1000
20/40
12.5
2.5
2.0
SAFETEC BS(R) 25/750 WT
750/1000
40/80
25
2.5
2.0
Published by: ISKRA ZA[^ITE, d.o.o. / May 2011 / Edition 4 /
Max. PV voltage
ISKRA ZAŠČITE, d.o.o., Surge Voltage Protection Systems, Engineering and Cooperation
Stegne 35, 1521 Ljubljana, SLOVENIA
T: +386(1)5003 100; F: +386(1)5003 236; E: sales@iskrazascite.si
www.iskrazascite.si