SECTION CONTENTS
406 Definition of selectivity
416 Back-up protection
417 Selectivity tables
432 Back-up tables
SELECTIVITY
AND BACK-UP
A
B
C
D
E
405
405
CONTENTSSelectivity between
electrical safety devices
■
DEFINITION OF SELECTIVITY
Selectivity between electrical safety devices is
necessary to guarantee maximum continuity of the
electric system.
The aim of selectivity is to ensure that in case of
fault, the necessary repair tripping will only affect
the safety devices immediately upstream the fault,
rather than the general ones, thus maintaining
service continuity for the branches of the system
not affected by the fault. Selectivity between
electric safety devices is obtained through correct
coordination of the individual electric features.
In general, selectivity is required in terms of:
•
overload;
•
short circuit;
•
earth fault (earth leakage).
Selectivity between two circuit breakers installed in
cascade can be
total when the downstream circuit
breaker (B) trips for all overcurrent values up to its
breaking capacity, or
partial when both circuit breakers
trip (A and B), when certain values are exceeded.
A
B
C
D
E
TOTaL SELECTIVITYA
B
Icc no tripping tripping parTIaL SELECTIVITYA
B
Icc no tripping tripping Is (selectivity limit)In this second case, a “selectivity limit” (ls) is set. This
us the current value below which only the downstream
circuit breaker will trip, and above which botch circuit
breakers will. In accordance with IEC 60947-2 and IEC
60898 standards, selectivity can be assessed comparing
the various tripping and energy curves provided by the
manufacturers.
Total selectivity: only B trips for all Icc values up to its breaking capacity
Partial selectivity: B is selective compared to A for Icc values up to the Is. Above this value, selectivity is not guaranteed for Icc>Is, and both circuit breakers may trip.
I
sOnly B opens
Both A and B open
I
cc(kA)
t (s)
A
B
A
B
■
OVErLOaD aMpErEMETEr SELECTIVITY
To ensure selectivity coordination of various devices,
the tripping curves of all selected circuit breakers
must be compared using a bi-logarithmic scale (Icc/t).
Graphically, selectivity is achieved when the curve of
the upstream circuit breaker (A) is on the right of the
curve of the downstream circuit breaker (B).
The intersection point of the magnetic curves is the
selectivity limit (Is).
Below this point, only the downstream circuit breaker
trips, while both will trip when this value is exceeded.
Overload selectivity is always guaranteed if the
tripping time delay of the upstream circuit breaker
is longer than the opening time of the downstream
circuit breaker for any overload current.
By selecting circuit breakers with nominal current
ratios equal or over 2, overload selectivity is always
guaranteed.
Overload selectivity can also be improved if devices
with adjustable tripping thresholds are used.
This type of selectivity is ensured using quick circuit
breakers without a device for the adjustment of the
release time delay.
This solution normally ensures partial selectivity.
407
GENEraL FEaTUrES407
Selectivity between
electrical safety devices
■
ShOrT CIrCUIT aMpErEMETEr SELECTIVITY
To ensure an efficient selectivity level between
two automatic circuit breakers in series, it will
be necessary to select them with instantaneous
(magnetic) tripping thresholds as far away as
possible from each other.
Total selectivity is ensured when the short circuit
current is below the magnetic tripping threshold of
the upstream circuit breaker (Icc<Is). On the other
hand, if the short circuit current is higher (Icc>Is),
selectivity can only be obtained if the downstream
circuit breaker specific feed through power is not
enough to cause tripping of the upstream circuit
breaker.
In this case, the specific feed-through power curves
of the circuit breakers must be compared, taking
into account a tolerance of ±20% on the magnetic
tripping value.
Only B opens
I
sBoth A and B open
B
A
I
cc(kA)
I
2t
(A
2s)
maximum
non activation
power value
A
B
By superimposing the line passing through the
maximum non activation value of the curve of the
specific power let through by the downstream circuit
breaker, the new Is limit value can be determined.
This must be higher than the magnetic tripping
threshold of the upstream circuit breaker.
time adjustment
In a short circuit, chronometric selectivity is achieved
by using circuit breakers capable of tripping with
an intentional time delay, either fixed or set by the
user. This tripping time delay provides the possibility
of distancing the magnetic curves, creating a step
in relation to the downstream circuit breaker. In this
way, selectivity is guaranteed because, should a short
circuit occur, the circuit breaker with the shortest
time delay will trip first.
When only “E” type electronic MEGATIKER Mccb’s are
used, the fixed time delay is equal to 0.05 s.
tA = fixed to 0.05s for “E” type MEGATIKER, adjustable to 0-0.01-0.2-0.3s for “S” and “T” type MEGATIKER.
I
s= instantaneous fixed
tA
tB = instantaneous
Only B opens Both A and B open
I
cc(kA)
t (s)
A
B
A
B
■
ChrONOMETrIC SELECTIVITY
In order to guarantee total selectivity also in short
circuit conditions, it is necessary that the downstream
circuit breaker trips in the presence of short circuit
currents before the upstream circuit breaker does.
This means that the magnetic curves of the circuit
breakers must be graphically separated. They cannot
be superimposed for any of the estimated short
circuit current values.
The separation between the curves is obtained by
setting such a magnetic tripping time delay on the
upstream circuit breaker that should a fault occur,
it will be the downstream circuit breaker that will
trip. By carefully selecting the current thresholds
and the tripping time delays on the various devices,
the selectivity concept can be extended to several
electric safety levels. This type of selectivity is
obtained by installing upstream circuit breakers with
adjustable tripping time delays, such as selective
electronic “E”, “S” and “T” type MEGATIKER Mccb’s
(classed as belonging to category B), and installing
downstream circuit breakers of the same type, or
thermal magnetic, with fixed time delay, depending
on system requirements. MEGATIKER electronic
Mccb’s provide two different types of adjustments:
•
magnetic tripping time delay adjustment
•
adjustment with constant I
2t
With the “S” or “T” types, this value can adjusted to
four different levels: 0 - 0.1 - 0.2 - 0.3 s.
In general, for this type of adjustment, the specific
power fed through by the circuit breaker increases
proportionally, based on the set delay.
Circuit breakers that trip with an intentional delay
during a short circuit, loose all limitation features.
It is therefore necessary to ensure that they are able
to withstand any electric and mechanical stresses
which may be caused by the passage of the short
circuit currents.
409
GENEraL FEaTUrES409
Selectivity between
electrical safety devices
Adjustment with constant i
2t
The second type of adjustment can be performed by
maintaining a constant value of the circuit breaker
specific feed through power.
In this case, the adjustment ensures that the circuit
breaker tripping curve assumes the trend shown on
the figure.
The elimination of the bottom bend, obtained by
adjusting the constant l
2t tripping time, provides an
advantage for selectivity.
Only B opens
I
s= instantaneous fixed
Both A and B open
tB = instantaneous
Adjustment with
constant l
2t
Standard
adjustment
I
cc(kA)
t (s)
A
B
A
B
■
LOGIC SELECTIVITY
Logic selectivity is an advancement on chronometric
coordination. It ensures selectivity also for current
values higher than the instantaneous tripping value.
Logic selectivity is an “intelligent” type of logic.
It is performed through an exchange of information
among electronic MEGATIKER devices wired in
cascade and connected to each other using a pilot
cable.
The advantages of logic selectivity are:
•
reduction of thermal and electromechanic stresses
on cables and busbars;
•
total selectivity also for circuit breakers of the same
size;
•
selectivity on several levels.
In practice, logic selectivity is ensured by using
MEGATIKER electronic Mccb’s with “S” or “T” type
releases, connected in cascade, and interconnected
to each other by a cable on the removable terminal
strip, located at the side of the circuit breaker. This
circuit is operated by an external 12Vd.c. power
supply. In addition, the selector on the electronic
release of the circuit breakers must be set
low
for MEGATIKER circuit breakers set on the lowest
selectivity logic, and
High for all other circuit
breakers upstream. Logic selectivity is not possible
for adjustments with constant I
2t.
The connection of the pilot cable to same level circuit
breakers can also be performed in parallel between
them, and not necessarily with the upstream circuit
breaker. The fundamental condition is that in both
circuit breakers the cable is connected on the out
terminal.
High Low SEL High Low SEL High Low SEL High Low SEL High Low SEL High Low SEL High Low SELout
in
SEL = High SEL = High SEL = HighSEL = Low SEL = Low SEL = Low SEL = Low
411
GENEraL FEaTUrES411
Selectivity between
electrical safety devices
Operating principle
In case of short circuit, the circuit breakers detecting
the fault send a signal, through the connection
cable, to the upper level circuit breaker/s, while at
the same time checking for a signal from one or
more lower level circuit breakers. The circuit breaker
within the logic selectivity chain that detects the
short circuit, and does not receive any signal from
downstream circuit breakers, trips immediately,
resetting any set time delays to zero. The circuit
breaker detecting the fault, but also the presence
High Low SEL
Fault 2
High Low SEL High Low SEL High Low SEL High Low SEL High Low SEL High Low SEL SEL = High SEL = LowSEL = High SEL = High
SEL = Low SEL = Low SEL = Low
Fault 1
A
B
of a signal from a downstream circuit breaker, stays
closed, and complies with the set time delays.
FAUlt 1
The A circuit breaker detects a fault. When no signal
is received from the lower level circuit breakers, A
immediately trips, resetting any set time delays to
zero.
FAUlt 2
A and B circuit breakers detect the fault. Circuit
breaker A receives a signal from the downstream
circuit breaker B and therefore remains closed,
complying with the set time delays. Circuit breaker B
does not receive any signal from lower level circuit
breakers, and therefore trips immediately, resetting
any set time delays to zero.
■
DYNaMIC SELECTIVITY
Dynamic selectivity is a special type of combination
used for increasing chronometric selectivity.
It is performed on two levels, with electronic “E”, “S”
and “T” MEGATIKER devices installed upstream, and
MEGATIKER (electronic “E”, “S” and “T”, thermal
magnetic) or BTDIN devices installed downstream.
This solution is recommended with systems featuring
high short circuit current values, when the circuit
breakers coordinated in dynamic selectivity are
within the same distribution board or at a maximum
distance of 3m from each other.
It is also recommended that the line (if in cable) is
installed with double insulation. In practice, dynamic
selectivity is achieved by adjusting the two-position
selector on the circuit breaker release on Low when
standard selectivity levels are required, and on High
when high selectivity levels are needed. Dynamic
coordination can be set for current values higher
than the instantaneous tripping value after checking,
through graphic analysis, the standard overload
and short circuit selectivity as shown in the figure.
Dynamic selectivity coordination applies in fact to
high short circuit current values, which must be
equal or higher than the fixed instantaneous tripping
values.
I
s= instantaneous fixed
I
/I
rt (s)
Operating zone
overload selectivity
Operating zone
circuit selectivity
Operating zone
dynamic selectivity
413
GENEraL FEaTUrES413
Selectivity between
electrical safety devices
High Low SEL High Low SEL SEL = Low SEL = Low High Low SEL High Low SEL SEL = Low SEL = High
Dynamic selectivity (“High”)
Selecting “
High” on the upstream circuit breaker,
and “
low” on the downstream one, the relay of
the starting circuit breaker is set to selective mode,
increasing the coordination(of a selective type),
between the two circuit breakers.
Operating principle
Standard selectivity (“low”)
When “
low” is selected, both on the upstream and
the downstream circuit breakers, chronometric or
amperemeter selectivity, as normally set using the
standard criteria, is maintained.
w
■
EarTh LEaKaGE SELECTIVITY
Earth fault selectivity is achieved using earth leakage
circuit breakers.
The necessary conditions to ensure an appropriate
level of selectivity are:
•
selecting circuit breakers with different rated earth
leakage currents, with a minimum ratio of at least
3 times (for example 30 mA downstream circuit
breakers and 100 mA upstream circuit breaker).
•
the tripping time delay of the upstream circuit
breaker must be longer than the total opening time
of the downstream circuit breaker.
Earth leakage selectivity can be split into two types:
Horizontal earth leakage selectivity
This is achieved with earth leakage circuit breakers
that individually protect one line of users. This
ensures service continuity, but not protection
upstream the circuits.
vertical earth leakage selectivity
This is achieved with earth leakage circuit breakers
installed in cascade. This guarantees maximum
protection, including of the circuits upstream the
individual earth leakage circuit breakers. In order
to optimize selective coordination, circuit breakers
with very different tripping thresholds must be used
(minimum ratio 3), or selective, or delayed devices.
The IEC 60364-5 standard prescribes that in order
to ensure selectivity between two earth leakage
devices, both the above conditions must be met.
Example of horizontal selectivity
id
id
IΔn = 0.03A IΔn = 0.03A
id
id
id
IΔn = 1A Δt = 1s IΔn = 0.3A Δt = 0.6s (type S) IΔn = 0.03A not delayedExample of vertical selectivity
415
GENEraL FEaTUrES415
Back-up protection is the condition, contemplated
by IEC 60364-5 standard, which is achieved when
in a system, a safety device (fuse or circuit breaker)
with breaking capacity lower than the estimated
short circuit current is used, provided that upstream
the device itself, another one is installed, capable of
acting as a support.
Back-up coordination between electrical safety
devices must be confirmed through specific lab
tests, which cannot certainly be performed by the
users or designers of electric systems. To resolve
this problem, Bticino provides a series of tables for
coordination at the various voltages.
This type of device effectively exploits the limitation
capabilities of the electrical safety devices in series.
Back-up
protection
Ib B A A B Icc (kA) I 2t (A 2s) Br ea ki ng c ap ac ity li m it of A P Ib B A A B Icc (kA) I 2t (A 2s) Br ea ki ng c ap ac ity li m it of A As so cia tio n br ea ki ng c ap ac ity B + A Br ea ki ng c ap ac ity li m it of B■
COOrDINaTION BETWEEN FUSES UpSTrEaM
aND CIrCUIT BrEaKEr DOWNSTrEaM
When creating back-up coordination between a
fuse and a circuit breaker, as shown in the figure,
the respective power curves can be compared and
superimposed. This type of comparison may identify
an intersection point P between the two curves near
a current value “Ib”, called “switching current”. This
value is the current value below which only the circuit
breaker trips, and above which also the support fuse
trips.
On the other hand, if considering the curves
represented below, for the bands delimited by the
minimum and maximum breaking limits around the lb
value, one would obtain an area of possible tripping
of the two devices at the same time, with two arcs
in series forming at the same time. For currents
definitely superior to Ib, the circuit breaker may also
not trip, and be totally protected by the fuse.
■
COOrDINaTION BETWEEN UpSTrEaM aND
DOWNSTrEaM CIrCUIT BrEaKErS
In case of back-up coordination between two circuit
breakers in series, the analysis on the power curves
show that there are no intersecting points.
The two curves extend up to the breaking capacity
limits of the individual circuit breakers. The power
curve resulting from the coordination between the
two devices is certainly lower than the curves of each
single circuit breaker taken on its own. This is because
of the limitation effect due to the in series impedance
of the circuit breakers. From this consideration, it
results that the breaking capacity of the association
of two circuit breakers is higher than the one of the
downstream circuit breaker, and that such breaking
capacity can reach the short circuit current value
with which the specific feed through power of the
association, is the same as the maximum that can be
withstood by the device downstream.
SECTION CONTENTS
418 Reading and understanding the selectivity tables
419 Selectivity with fuses upstream and BTDIN downstream
420 MEGATIKER and gG fuses
421 MEGATIKER upstream and BTDIN downstream (230V a.c.)
422 MEGATIKER upstream and BTDIN downstream (400V a.c.)
423 Thermal magnetic MEGATIKER upstream and downstream (230V a.c.)
424 Thermal magnetic MEGATIKER upstream and downstream (400V a.c.)
425 Thermal magnetic MEGATIKER upstream and downstream (500V a.c.)
426 Electronic MEGATIKER with SEL on Low upstream and MEGATIKER
downstream (230V a.c.)
427 Electronic MEGATIKER with SEL on Low upstream and MEGATIKER
downstream (400V a.c.)
428 Electronic MEGATIKER with SEL on Low upstream and MEGATIKER
downstream (500V a.c.)
429 Electronic MEGATIKER with SEL on High upstream and MEGATIKER
downstream (400V a.c.)
430 MEGABREAK upstream and MEGATIKER downstream
431 BTDIN upstream and motor protectors downstream
SELECTIVITY
TaBLES
417
417
CONTENTSreading and understanding
the selectivity tables
400V a.c.
Below are the various tables showing the selectivity between Bticino automatic circuit breakers in accordance with IEC 60947-2 standard requirements.
The coordination tables at the various power supply voltages in three-phase and one-phase systems have been included:
• 230V a.c. • 400V a.c. • 500V a.c.
The values shown represent the selectivity limit starting from the instantaneous (expressed as a kA value), which can be reached from the downstream device, taking into account the breaking capacities of the upstream and downstream devices in compliance with IEC 60947-2 standards. The letter “T” indicates total selectivity up to the breaking capacity limit of the downstream device.
“O” indicates that the selectivity limit corresponds to the Magnetic tripping value of the upstream device.
In situations of coordination with devices fitted with magnetic tripping threshold adjustment, the data shown in the tables refer to the maximum settable values.
In case of coordination with devices fitted with tripping time delay adjustment, the data shown on the table must be considered with the time delay set to “0” (instantaneous tripping).
Unless otherwise stated, the coordination tables with BTDIN Mcb’s refer to C type circuit breakers, with magnetic tripping threshold between 5 and 10 In.
The selectivity between BTDIN Mcb’s is an amperemeter type selectivity, which can be assessed taking into account the corresponding magnetic tripping.
Where coordination with circuit breakers with selectivity limits higher than 20 kA is concerned, time adjustment has no effect and does not improve selectivity itself.
Time adjustments between electronic circuit breakers can be performed with benefits to selectivity, in case of short circuit currents lower than 20 kA.
example of selectivity check
In order to better understand how to use the selectivity tables see the following example.
The aim is to determine the selectivity limit in the coordination between an upstream MEGATIKER Mccb ME125B with In = 125 and a BTDIN Mcb 60 with In = 32A, in a 230V a.c. one-phase system.
Refer to the coordination table on page 419.
Go to the ME125B circuit breaker and look for the 125A value. Scroll through the 125A value column, until the intersection with the BTDIN Mcb 60 at 32A is found.
The value found is 8kA.
This is the coordination selectivity limit, below which only the BTDIN Mcb 60 will trip, and above which both the BTDIN Mcb 60 and the MEGATIKER Mccb ME125B will trip.
In (A) BTDIN 45/60/100/250 C curve upstream
6 10 16 20 25 32 Downstream fuses 2 T T T T T T (Icn=100 kA) 4 – T T T T T 5 – – T T T T 8 – – – T T T 10 – – – – T T 16 – – – – – T
Downstream In (A) aM fuses upstream gG fuses upstream
Mcb’s 32 40 50 63 80 100 125 32 40 50 63 80 100 125 BtDIn 60 6 1.2 1.6 2.2 4 4.2 8 T 1.4 2 2.7 5.5 T T T D curve 10 – 1.4 2 3 3.5 6 9.5 1 1.5 2.2 4.5 7 T T 16 – 1.2 1.5 2.4 3 5 7.5 – 1.3 1.8 3.5 6.5 8 T 20 – 1 1.3 2 2.5 4.2 6 – 1.2 1.6 3 4.7 6.5 T 25 – – 1.2 1.8 2.1 3.7 5 – 1 1.5 2.7 4 5.5 9 32 – – 1 1.5 1.8 3 4 – – 1.1 2.1 3.5 4.7 7.5 40 – – – – 1.7 2.6 3.5 – – – 1.8 1.7 3 6 50 – – – – 1.4 2 3 – – – 1.8 2.5 3.5 5.5 63 – – – – – 2 3 – – – – 2.5 3.5 5.5 BtDIn 100 6 1.2 1.6 2.2 4 4.2 8 14 1.4 2 2.7 5.5 T T T D and K curve 10 – 1.4 2 3 3.5 6 9.5 1 1.5 2.2 4.5 7 11 T 16 – 1.2 1.5 2.4 3 5 7.5 – 1.3 1.8 3.5 6.5 8 15 20 – 1 1.3 2 2.5 4.2 6 – 1.2 1.6 3 4.7 6.5 12 25 – – 1.2 1.8 2.1 3.7 5 – 1 1.5 2.7 4 5.5 9 32 – – 1 1.5 1.8 3 4 – – 1.1 2.1 3.5 4.7 7.5 40 – – – – 1.7 2.6 3.5 – – – 1.8 2.8 4 6 50 – – – – 1.4 2 3 – – – 1.8 2.5 3.5 5.5 63 – – – – – 2 3 – – – – 2.5 3.5 5.5
Selectivity:
fuses upstream and BTDIN downstream (three-phase system)
400V a.c.
Downstream In (A) aM fuses upstream gG fuses upstream
Mcb’s 25 32 40 50 63 80 100 125 160 32 40 50 63 80 100 125 160 BtDIn 45 6 1 1.6 2.1 3.2 T T T T T 1.3 1.9 2.5 4 T T T T C curve 10 – 1.1 1.7 2.5 T T T T T – 1.6 2.2 3.2 3.6 T T T 16 – 1 1.4 2.1 4 T T T T – 1.4 1.8 2.6 3 T T T 20 – – 1.3 1.8 3.4 T T T T – 1.2 1.5 2.2 2.5 T T T 25 – – 1.1 1.6 3 T T T T – – 1.3 2 2.2 4.1 T T 32 – – – 1.3 2.4 3.8 T T T – – 1.2 1.7 1.9 3.5 T T 40 – – – – 2.1 3.1 4.2 T T – – – – 1.7 3 4 T 50 – – – – 2 2.9 3.7 T T – – – – 1.6 2.6 3.5 4.5 63 – – – – – 2.8 3.5 T T – – – – – 2.4 3.3 4.5 BtDIn 60 6 1 1.6 2.1 3.2 6.2 T T T T 1.3 1.9 2.5 4 4.6 T T T C curve 10 – 1.1 1.7 2.5 5 7.8 T T T – 1.6 2.2 3.2 3.6 7 T T 16 – 1 1.4 2.1 4 6 9 T T – 1.4 1.8 2.6 3 5.6 8 T 20 – – 1.3 1.8 3.4 5.1 7 T T – 1.2 1.5 2.2 2.5 4.6 6.3 T 25 – – 1.1 1.6 3 4.5 6 9.3 T – – 1.3 2 2.2 4.1 5.5 9 32 – – – 1.3 2.4 3.8 5 7.7 9 – – 1.2 1.7 1.9 3.5 4.5 8 40 – – – – 2.1 3.1 4.2 6.4 7 – – – – 1.7 3 4 6 50 – – – – 2 2.9 3.7 6 6 – – – – 1.6 2.6 3.5 5 63 – – – – – 2.8 3.5 5.5 6 – – – – – 2.4 3.3 5 BtDIn 100 6 1 1.6 2.1 3.2 6.2 T T T T 1.3 1.9 2.5 4 4.6 11 T T C curve 10 – 1.1 1.7 2.5 5 7.8 12 T T – 1.6 2.2 3.2 3.6 7 11 T 16 – 1 1.4 2.1 4 6 9 T T – 1.4 1.8 2.6 3 5.6 8 14 20 – – 1.3 1.8 3.4 5.1 7 14 T – 1.2 1.5 2.2 2.5 4.6 6.3 10 25 – – 1.1 1.6 3 4.5 6 9.3 14 – – 1.3 2 2.2 4.1 5.5 7 32 – – – 1.3 2.4 3.8 5 7.7 10 – – 1.2 1.7 1.9 3.5 4.5 6 40 – – – – 2.1 3.1 4.2 6.4 7 – – – – 1.7 3 4 5 50 – – – – 2 2.9 3.7 6 6 – – – – 1.6 2.6 3.5 4 63 – – – – – 2.8 3.5 5.5 6 – – – – – 2.4 3.3 4 80 – – – – – – 3 6 8 – – – – – 3 3 4 100 – – – – – – – 4 5 – – – – – – 3 3.5 125 – – – – – – – – 4 – – – – – – – 3.5 BtDIn 250 6 1 1.6 2.1 3.2 6.2 15 25 25 T 1.3 1.9 2.5 4 4.6 11 25 T C curve 10 – 1.1 1.7 2.5 5 7.8 12 25 T – 1.6 2.2 3.2 3.6 7 11 20 16 – 1 1.4 2.1 4 6 9 21 T – 1.4 1.8 2.6 3 5.6 8 15 20 – – 1.3 1.8 3.4 5.1 7 14 20 – 1.2 1.5 2.2 2.5 4.6 6.3 10 25 – – 1.1 1.6 3 4.5 6 9.3 14 – – 1.3 2 2.2 4.1 5.5 8 32 – – – 1.3 2.4 3.8 5 7.7 10 – – 1.2 1.7 1.9 3.5 4.5 7 40 – – – – 2.1 3.1 4.2 6.4 8 – – – – 1.7 3 4 5 50 – – – – 2 2.9 3.7 6 7 – – – – 1.6 2.6 3.5 4.5 63 – – – – – 2.8 3.5 5.5 7 – – – – – 2.4 3.3 4.5 BtDIn 250H 25 – – 1.1 1.6 3 4.5 6 9.3 14 – – 1.3 2 2.2 4.1 5.5 8 C curve 32 – – – 1.3 2.4 3.8 5 7.7 10 – – 1.2 1.7 1.9 3.5 4.5 7 40 – – – – 2.1 3.1 4.2 6.4 8 – – – – 1.7 3 4 5 50 – – – – 2 2.9 3.7 6 7 – – – – 1.6 2.6 3.5 4.5 63 – – – – – 2.8 3.5 5.5 7 – – – – – 2.4 3.3 4.5
419
419
SELECTIVITY TaBLESSelectivity:
MEGaTIKEr and gG fuses (three-phase system)
400V a.c.
Downstream Mccb’s GG fuses upstream
In (A) 200 250 400 800 1000 MA125 125 6 – – – – ME125B 125 – 7.5 – – – ME125n 125 – 10 10 – – ME160B/n/H 160 – – 10 – – ME250B/n/H 250 – – 10 – – MA/MH160 160 – – 10 – – MA/MH/ML250 250 – – 10 – – MA/MH/ML250E 250 – – 10 – – MA400 400 – – – 10 – MH/ML400 400 – – – 25 – MA/MH/ML400E 400 – – – 25 – MA/MH/ML630E 630 – – – – 40 MA/MH/ML630Mt 630 – – – – 40 MA/MH630 630 – – – – 50 ML630 630 – – – – 60 MA/MH/ML800 800 – – – – 60
MEgaTIkEr upstream Icu = 16-25ka Ma ME ME ME 125 125B 160B 250B gg fuse In (A) 125 125 160 250
downstream 50 16 25 – –
80 – – 25 25
MEgaTIkEr upstream Icu = 100ka
ML250 ML400 ML630MT ML630 ML800 ML250E ML400E ML630E
gg fuse In (A) 250 400 630 630 800
downstream 125 100 – – – –
250 – 100 – – –
310 – – 100 100 100
MEgaTIkEr upstream Icu = 70ka
MH160 MH250 MH400 MH630MT MH630 MH800 MH250E MH400E MH630E
gg fuse In (A) 160 250 400 630 630 800 downstream 50 – – – – – – 80 70 – – – – – 125 – 70 – – – – 250 – – 70 – – – 310 – – – 70 70 70
MEgaTIkEr upstream Icu = 36ka
ME125N ME160N ME250N Ma160 Ma250 Ma400 Ma630MT Ma250E Ma400E Ma630E gg fuse In (A) 125 160 250 160 250 400 630 downstream 50 36 – – – – – – 80 – 36 36 36 – – – 125 – – – – 36 – – 250 – – – – – 36 – 310 – – – – – – 36
MEgaTIkEr upstream Icu = 50ka
ME ME Ma Ma 160H 250H 630 800 gg fuse In (A) 160 250 630 800
downstream 80 50 50 – –
Selectivity:
MEGaTIKEr upstream and BTDIN downstream (one-phase system)
230V a.c.
The table refers to upstream circuit breakers on a 400-415V a.c.three-phase line, and downstream circuit breakers on a 230V a.c. one-phase line (for all tripping curves B - C - D - K - Z).
Ma125 ME125B ME160B ME250B Ma160 Ma250-250E ME125N ME160N ME250N MH160 MH250-250E ME160H ME250H ML250-250E
In (A) 40 63 100 125 40 63 100 125 100 160 100 160 250 63 100 160 100 160 250 BTDIN 6 to 25 T T T T T T T T T T T T T T T T T T T 45 32 4 4 T T 4 4 T T T T T T T 4 4 T 4 T T 40 – 3.5 T T – 3.5 T T 4 T 4 T T 3.5 3.5 T 3.5 T T 50 – – T T – – T T – T 2 T T – 3 T 3 T T 63 – – T T – – T T – T – T T – 3 T 3 T T BTDIN 6-10 T T T T T T T T T T T T T T T T T T T 60 16 9 9 T T 9 9 T T T T T T T T T T T T T 20 6 6 T T 6 6 T T T T T T T 5 5 T 5 T T 25 5 5 10 10 5 5 10 10 4 T 4 T T 4.5 4.5 T 4.5 T T 32 – 4 8 8 – 4 8 8 4 T 4 T T 4 4 T 4 14 T 40 – 3.5 6 6 – 3.5 6 6 4 T 4 T T 3.5 3.5 T 3.5 9.5 T 50 – – 5 5 – – 5 5 – T 2 T T – 3 T 3 7 T 63 – – 4.5 4.5 – – 4.5 4.5 – T 2 T 7 – 3 T 3 6 T BTDIN 6 T T T T T T T T T T T T T T T T T T T 100 16 9 9 T T 9 9 T T 8 T 8 T T 9 T T T T T 20 6 6 T T 6 6 T T 6 T 6 T T 5 8 T 8 T T 25 5 5 10 10 5 5 10 10 6 10 6 10 T 4.5 6 T 6 T T 32 – 4 7 7 – 4 7 7 4 8 4 8 T 4 6 T 6 T T 40 – 3.5 5.5 5.5 – 3.5 5.5 5.5 3 6 3 6 T 4 6 T 6 T T 50 – – 5 5 – – 5 5 3 6 3 6 9 – 6 8 6 8 T 63 – – 4.5 4.5 – – 4.5 4.5 2 5 2 5 8 – 3 8 3 8 T 80 – – – 2 – – – 2 – 5 – 5 7 – – 8 – 8 T 100 – – – – – – – – – 4 – 4 6 – – 6 – 6 T 125 – – – – – – – – – 2 – 2 5 – – 3 – 3 8 BTDIN 6 – – – – T T T T T T T T T T T T T T T 250 10 – – – – T T T T 9 T T T T T T T T T T 16 – – – – 9 9 T T 7 T 9 T T 9 12 T 12 T T 20 – – – – 6 6 17 17 6 20 9 T T 5 10 T 10 T T 25 – – – – 5 5 10 10 4 10 7 10 T 4.5 8 T 8 T T 32 – – – – – 4 7 7 4 10 5 8 T 4 6 T 6 T T 40 – – – – – 3.5 5.5 5.5 2.5 7 4 6 12 3.5 6 12 6 12 T 50 – – – – – – 5 5 – 7 3 6 9 – 6 8 6 10 T 63 – – – – – – 4.5 4.5 – 7 3 6 7 – 6 8 6 10 T BTDIN 25 – – – – 5 5 10 10 4 10 7 10 T 4.5 8 T 8 T T 250H 32 – – – – – 4 7 7 4 10 5 8 T 4 6 T 6 T T 40 – – – – – 3.5 5.5 5.5 2.5 7 4 6 12 3.5 6 12 6 12 T 50 – – – – – – 5 5 – 7 3 6 9 – 6 8 6 10 T 63 – – – – – – 4.5 4.5 – 7 3 6 7 – 6 8 6 10 T
Ma400 Ma630MT Ma400-630E Ma630 to 1250 Ma630 to 1600ES MH400 MH630MT MH400-630E MH630 to 1250 MH630 to 1600ES ML400 ML630MT ML400-630E ML630 to 1250 In (A) 250 320 400 500 630 160 250 400 630 500 630 800 1000 1250 630 800 1250 1600 BTDIN 45 6 to 63 T T T T T T T T T T T T T T T T T T BTDIN 60 6 to 63 T T T T T T T T T T T T T T T T T T BTDIN 100 6 to 125 T T T T T T T T T T T T T T T T T T BTDIN 250 6 to 63 T T T T T T T T T T T T T T T T T T BTDIN 250H 25 to 63 T T T T T T T T T T T T T T T T T T
421
421
SELECTIVITY TaBLESSelectivity:
MEGaTIKEr upstream and BTDIN downstream (three-phase system)
400V a.c.
Ma125 ME125B ME160B ME250B Ma160 Ma250-250E ME125N ME160N ME250N MH160 MH250-250E ME160H ME250H ML250-250E
In (A) 40 63 100 125 40 63 100 125 100 160 100 160 250 63 100 160 100 160 250 BTDIN 6-10 T T T T T T T T T T T T T T T T T T T 45 16-20 T T T T T T T T T T T T T 4 T T T T T 25 T T T T T T T T 4 T 4 T T 3 T T T T T 32 3 3 4 4 3 3 4 4 3.5 T 3.5 T T 2 T T T T T 40 – 3 3 3 – 3 3 3 2.5 T 2.5 T T 2 T T T T T 50 – – 3 3 – – 3 3 2 T 2 T T – 4 T 4 T T 63 – – 3 3 – – 3 3 – T – T T – 4 T 4 T T BTDIN 6 T T T T T T T T T T T T T T T T T T T 60 10 5 5 T T 5 5 T T T T T T T 5 T T T T T 16 4 4 T T 4 4 T T T T 8 T T 4 T T T T T 20 4 4 5 5 4 4 5 5 5 T 6 T T 4 T T T T T 25 3 3 4.5 4.5 3 3 4.5 4.5 4 T 5 T T 3 T T T T T 32 3 3 4 4 3 3 4 4 3.5 T 4 T T 2 5 T 5 T T 40 – 3 3 3 – 3 3 3 2.5 T 3.5 T T 2 5 T 5 T T 50 – – 3 3 – – 3 3 2 5.5 3 5.5 T – 4 T 4 T T 63 – – 3 3 – – 3 3 – 5 2 5 5 – 4 T 4 T T BTDIN 6 6 6 T T 6 6 T T T T T T T 6 T T T T T 100 10 5 5 6 6 5 5 6 6 7 T T T T 5 T T T T T 16 4 4 6 6 4 4 6 6 6 T 8 T T 4 T T T T T 20 3 3 5 5 3 3 5 5 5 T 6 T T 4 8 T 8 T T 25 3 3 4.5 4.5 3 3 4.5 4.5 4 8.5 5 8.5 T 3 6 T 6 T T 32 – 2 4 4 – 2 4 4 3.5 7 4 7 T 2 5 T 5 T T 40 – 2 3 3 – 2 3 3 2.5 6 3.5 6 T 2 5 T 5 T T 50 – – 3 3 – – 3 3 2 5.5 3 5.5 7 – 4 8 4 8 T 63 – – 3 3 – – 3 3 2 5 – 5 5 – 4 8 4 8 T 80 – – – 2 – – – 2 – 5 – 5 5 – – 8 – 8 T 100 – – – – – – – – – 4 – 4 4 – – 6 – 6 T 125 – – – – – – – – – 2 – 2 3 – – 3 – 3 8 BTDIN 6 – – – – 6 6 13 13 12 T T T T 6 T T T T T 250 10 – – – – 5 5 7.5 7.5 7 T T T T 5 15 T 15 T T 16 – – – – 4 4 6 6 6 18 8 T T 4 10 T 10 T T 20 – – – – 3 3 5 5 5 12 6 T T 4 8 T 8 T T 25 – – – – 3 3 4.5 4.5 4 8.5 5 8.5 T 3 6 T 6 T T 32 – – – – – 2 4 4 3.5 7 4 7 T 2 5 T 5 T T 40 – – – – – 2 3 3 2.5 6 3.5 6 10 2 5 10 5 10 T 50 – – – – – – 3 3 2 5.5 3 5.5 7 – 4 8 4 8 T 63 – – – – – – 3 3 – 5 2 5 5 – 4 8 4 8 T BTDIN 25 – – – – 3 3 4.5 4.5 4 8.5 5 8.5 T 3 6 T 6 T T 250H 32 – – – – – 2 4 4 3.5 7 4 7 T 2 5 T 5 T T 40 – – – – – 2 3 3 2.5 6 3.5 6 10 2 5 10 5 10 T 50 – – – – – – 3 3 2 5.5 3 5.5 7 – 4 8 4 8 T 63 – – – – – – 3 3 – 5 2 5 5 – 4 8 4 8 T
Ma400 Ma630MT Ma400-630E Ma630 to 1250 Ma630 to 1600ES MH400 MH630MT MH400-630E MH630 to 1250 MH630 to 1600ES ML400 ML630MT ML400-630E ML630 to 1250 In (A) 250 320 400 500 630 160 250 400 630 500 630 800 1000 1250 630 800 1250 1600 BTDIN 45 6 to 63 T T T T T T T T T T T T T T T T T T BTDIN 60 6 to 63 T T T T T T T T T T T T T T T T T T BTDIN 100 6 to 125 T T T T T T T T T T T T T T T T T T BTDIN 250 6 to 63 T T T T T T T T T T T T T T T T T T BTDIN 250H 25 to 63 T T T T T T T T T T T T T T T T T T
Selectivity: thermal magnetic MEGaTIKEr upstream
and downstream (one-phase system)
230V a.c.
MEGAtIKER MEGAtIKER upstream
downstream MA125 ME160B ME250B MA160 MA250 MA400 MA630Mt MA630 MA800 MA1250 ME125B ME160n ME250n MH160 MH250 MH400 MH630Mt MH630 MH800 MH1250 ME125n ME160H ME250H ML250 ML400 ML630Mt ML630 ML800 ML1250
In (A) 40 63 100 to 125 40 63 100 160 250 63 100 160 250 250 320 400 500 630 500 630 800 1000 1250 MA125 16 0.8 1 1.2 – 0.6 1 1.6 2.5 0.6 1 1.6 2.5 6 6 6 6 8 12 16 16 16 16 ME125B/n 25 0.8 1 1.2 – – 1 1.6 2.5 – 1 1.6 2.5 6 6 6 6 8 12 16 16 16 16 40 – 1 1.2 – – 1 1.6 2.5 – 1 1.6 2.5 6 6 6 6 8 12 16 16 16 16 63 – – 1.2 – – – 1.6 2.5 – – 1.6 2.5 6 6 6 6 8 12 16 16 16 16 100 – – – – – – 1.6 2.5 – – 1.6 2.5 4 4 4 6 8 12 16 16 16 16 125 – – – – – – 1.6 2.5 – – 1.6 2.5 4 4 4 6 8 12 16 16 16 16 ME160B/n/H 25 – – – 0.4 0.6 1 1.6 2.5 0.6 1 1.6 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 ME250B/n/H 40 – – – – 0.6 1 1.6 2.5 0.6 1 1.6 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 63 – – – – – 1 1.6 2.5 – 1 1.6 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 100 – – – – – – 1.6 2.5 – – 1.6 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 160 – – – – – – – 2.5 – – – 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 250 – – – – – – – – – – – – – 3.2 4 5 6.3 12 16 16 16 16 MA/MH160 25 – – – – – – – – 0.6 1 1.6 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 MA/MH/ML250 40 – – – – – – – – 0.6 1 1.6 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 63 – – – – – – – – – 1 1.6 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 100 – – – – – – – – – – 1.6 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 160 – – – – – – – – – – – 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 250 – – – – – – – – – – – – – 3.2 4 5 6.3 12 16 16 16 16 MA/MH/ML250E 40 – – – – – – – – – – – – – – 4 5 6.3 12 16 16 16 16 63 – – – – – – – – – – – – – – 4 5 6.3 12 16 16 16 16 100 – – – – – – – – – – – – – – 4 5 6.3 12 16 16 16 16 160 – – – – – – – – – – – – – – 4 5 6.3 12 16 16 16 16 250 – – – – – – – – – – – – – – 4 5 6.3 12 16 16 16 16 MA/MH/ML400 250 – – – – – – – – – – – – – 3.2 4 5 6.3 12 16 16 16 16 MA/MH/ML630Mt 320 – – – – – – – – – – – – – – 4 5 6.3 12 16 16 16 16 400 – – – – – – – – – – – – – – – 5 6.3 12 16 16 16 16 500 – – – – – – – – – – – – – – – – 6.3 – – – – – 630 – – – – – – – – – – – – – – – – – – – – – – MA/MH/ML400E 160 – – – – – – – – – – – – – – – – 6.3 5 6.3 8 6 8 MA/MH/ML630E 250 – – – – – – – – – – – – – – – – 6.3 5 6.3 8 6 8 400 – – – – – – – – – – – – – – – – 6.3 5 6.3 8 6 8 630 – – – – – – – – – – – – – – – – – – – 8 6 8 MA/MH/ML 500 – – – – – – – – – – – – – – – – – – 5 8 – 7.5 630 to 1250 630 – – – – – – – – – – – – – – – – – – – 8 – 7.5 800 – – – – – – – – – – – – – – – – – – – – – – 1000 – – – – – – – – – – – – – – – – – – – – – 7.5 1250 – – – – – – – – – – – – – – – – – – – – – –
423
423
SELECTIVITY TaBLESSelectivity: thermal magnetic MEGaTIKEr upstream and
downstream (three-phase system)
400V a.c.
MEgaTIkEr MEgaTIkEr upstream
downstream Ma125 ME160B ME250B Ma160 Ma250 Ma400 Ma630MT Ma630 Ma800 Ma1250 ME125B ME160N ME250N MH160 MH250 MH400 MH630MT MH630 MH800 MH1250 ME125N ME160H ME250H ML250 ML400 ML630MT ML630 ML800 ML1250
In (A) 40 63 100-125 40 63 100 160 250 63 100 160 250 250 320 400 500 630 500 630 800 1000 1250 Ma125 16 0.8 1 1.2 – 0.63 1 1.6 2.5 0.63 1 1.6 2.5 6 6 6 6 8 12 16 16 16 16 25 0.8 1 1.2 – – 1 1.6 2.5 – 1 1.6 2.5 6 6 6 6 8 12 16 16 16 16 40 – 1 1.2 – – 1 1.6 2.5 – 1 1.6 2.5 6 6 6 6 8 12 16 16 16 16 63 – – 1.2 – – – 1.6 2.5 – – 1.6 2.5 6 6 6 6 8 12 16 16 16 16 100-125 – – – – – – 1.6 2.5 – – 1.6 2.5 4 4 4 6 8 12 16 16 16 16 ME125B 16 0.8 1 1.2 – 0.63 1 1.6 2.5 0.63 1 1.6 2.5 6 6 6 6 8 12 16 16 16 16 ME125N 25 0.8 1 1.2 – – 1 1.6 2.5 – 1 1.6 2.5 6 6 6 6 8 12 16 16 16 16 40 – 1 1.2 – – 1 1.6 2.5 – 1 1.6 2.5 6 6 6 6 8 12 16 16 16 16 63 – – 1.2 – – – 1.6 2.5 – – 1.6 2.5 6 6 6 6 8 12 16 16 16 16 100-125 – – – – – – 1.6 2.5 – – 1.6 2.5 4 4 4 6 8 12 16 16 16 16 ME160B/N/H 25 – – – 0.4 0.63 1 1.6 2.5 0.63 1 1.6 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 ME250B/N/H 40 – – – – 0.63 1 1.6 2.5 0.63 1 1.6 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 63 – – – – – 1 1.6 2.5 – 1 1.6 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 100 – – – – – – 1.6 2.5 – – 1.6 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 160 – – – – – – – 2.5 – – – 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 250 – – – – – – – – – – – – – 3.2 4 5 6.3 12 16 16 16 16 Ma/MH160 25-40 – – – – – – – – 0.63 1 1.6 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 Ma/MH/ML250 63 – – – – – – – – – 1 1.6 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 100 – – – – – – – – – – 1.6 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 160 – – – – – – – – – – – 2.5 2.5 3.2 4 5 6.3 12 16 16 16 16 250 – – – – – – – – – – – – – 3.2 4 5 6.3 12 16 16 16 16 Ma250E 40 to 250 – – – – – – – – – – – – – – 4 5 6.3 12 16 16 16 16 MH/ML250E 40 to 250 – – – – – – – – – – – – – 3.2 4 5 6.3 12 16 16 16 16 Ma/MH/ML400 250 – – – – – – – – – – – – – 3.2 4 5 6.3 10 10 10 10 10 Ma/MH/ML630MT 320 – – – – – – – – – – – – – – 4 5 6.3 10 10 10 10 10 400 – – – – – – – – – – – – – – – 5 6.3 10 10 10 6 7.5 500 – – – – – – – – – – – – – – – – 6.3 – 10 10 6 7.5 630 – – – – – – – – – – – – – – – – – – – 10 6 7.5 Ma/MH/ML400E 160 – – – – – – – – – – – – – – – – 6.3 5 6.3 8 6 8 Ma/MH/ML630E 250 – – – – – – – – – – – – – – – – 6.3 5 6.3 8 6 8 400 – – – – – – – – – – – – – – – – 6.3 5 6.3 8 6 8 630 – – – – – – – – – – – – – – – – – – – 8 6 8 Ma/MH/ML 500 – – – – – – – – – – – – – – – – – – 5 8 – 7.5 630 to 1250 630 – – – – – – – – – – – – – – – – – – – 8 7.5 7.5 800 – – – – – – – – – – – – – – – – – – – – 7.5 7.5 1000 – – – – – – – – – – – – – – – – – – – – – 7.5 1250 – – – – – – – – – – – – – – – – – – – – – –
500V a.c.
MEgaTIkEr MEgaTIkEr upstream
downstream Ma125 ME160B ME250B Ma160 Ma250 Ma400 Ma630MT Ma630 Ma800 Ma1250 ME125B ME160N ME250N MH160 MH250 MH400 MH630MT MH630 MH800 MH1250 ME125N ME160H ME250H ML250 ML400 ML630MT ML630 ML800 ML1250
In (A) 40 63 100-125 40 63 100 160 250 63 100 160 250 250 320 400 500 630 500 630 800 1000 1250 Ma125 16 0.8 1 1.2 – 0.6 1 1.6 2.5 0.6 1 1.6 2.5 6 6 6 6 8 T T T T T ME125B 25 0.8 1 1.2 – – 1 1.6 2.5 – 1 1.6 2.5 6 6 6 6 8 T T T T T 40 – 1 1.2 – – 1 1.6 2.5 – 1 1.6 2.5 6 6 6 6 8 T T T T T 63 – – 1.2 – – – 1.6 2.5 – – 1.6 2.5 6 6 6 6 8 T T T T T 100-125 – – – – – – 1.6 2.5 – – 1.6 2.5 4 4 4 6 8 T T T T T ME125N 16 0.8 1 1.2 – 0.6 1 1.6 2.5 0.6 1 1.6 2.5 6 6 6 6 8 12 12 12 12 12 25 0.8 1 1.2 – – 1 1.6 2.5 – 1 1.6 2.5 6 6 6 6 8 12 12 12 12 12 40 – 1 1.2 – – 1 1.6 2.5 – 1 1.6 2.5 6 6 6 6 8 12 12 12 12 12 63 – – 1.2 – – – 1.6 2.5 – – 1.6 2.5 6 6 6 6 8 12 12 12 12 12 100-125 – – – – – – 1.6 2.5 – – 1.6 2.5 4 4 4 6 8 12 12 12 12 12 ME160B/N 25 – – – 0.4 0.6 1 1.6 2.5 0.6 1 1.6 2.5 2.5 3.2 4 5 6.3 T T T T T ME250B/N 40 – – – – 0.6 1 1.6 2.5 0.6 1 1.6 2.5 2.5 3.2 4 5 6.3 T T T T T 63 – – – – – 1 1.6 2.5 – 1 1.6 2.5 2.5 3.2 4 5 6.3 T T T T T 100 – – – – – – 1.6 2.5 – – 1.6 2.5 2.5 3.2 4 5 6.3 T T T T T 160 – – – – – – – 2.5 – – – 2.5 2.5 3.2 4 5 6.3 T T T T T 250 – – – – – – – – – – – – – 3.2 4 5 6.3 T T T T T ME160H 25 – – – 0.4 0.6 1 1.6 2.5 0.6 1 1.6 2.5 2.5 3.2 4 5 6.3 12 12 12 12 12 ME250H 40 – – – – 0.6 1 1.6 2.5 0.6 1 1.6 2.5 2.5 3.2 4 5 6.3 12 12 12 12 12 63 – – – – – 1 1.6 2.5 – 1 1.6 2.5 2.5 3.2 4 5 6.3 12 12 12 12 12 100 – – – – – – 1.6 2.5 – – 1.6 2.5 2.5 3.2 4 5 6.3 12 12 12 12 12 160 – – – – – – – 2.5 – – – 2.5 2.5 3.2 4 5 6.3 12 12 12 12 12 250 – – – – – – – – – – – – – 3.2 4 5 6.3 12 12 12 12 12 Ma/MH160 25 – – – – – – – – 0.6 1 1.6 2.5 2.5 3.2 4 5 6.3 12 12 12 12 12 Ma/MH/ML250 40 – – – – – – – – 0.6 1 1.6 2.5 2.5 3.2 4 5 6.3 12 12 12 12 12 63 – – – – – – – – – 1 1.6 2.5 2.5 3.2 4 5 6.3 12 12 12 12 12 100 – – – – – – – – – – 1.6 2.5 2.5 3.2 4 5 6.3 12 12 12 12 12 160 – – – – – – – – – – – 2.5 2.5 3.2 4 5 6.3 12 12 12 12 12 250 – – – – – – – – – – – – – 3.2 4 5 6.3 12 12 12 12 12 Ma/MH/ML250E 40 – – – – – – – – – – – – – – 4 5 6.3 12 12 12 12 12 63 – – – – – – – – – – – – – – 4 5 6.3 12 12 12 12 12 100 – – – – – – – – – – – – – – 4 5 6.3 12 12 12 12 12 160 – – – – – – – – – – – – – – 4 5 6.3 12 12 12 12 12 250 – – – – – – – – – – – – – – 4 5 6.3 12 12 12 12 12 Ma/MH/ML 250 – – – – – – – – – – – – – 3.2 4 5 6.3 12 12 12 12 12 400 to 630MT 320 – – – – – – – – – – – – – – 4 5 6.3 12 12 12 12 12 400 – – – – – – – – – – – – – – – 5 6.3 12 12 12 12 12 500 – – – – – – – – – – – – – – – – – – – – – – 630 – – – – – – – – – – – – – – – – – – – – – – Ma/MH/ML400E 160 – – – – – – – – – – – – – – – – 6.3 5 6.3 8 6 8 Ma/MH/ML630E 250 – – – – – – – – – – – – – – – – 6.3 5 6.3 8 6 8 400 – – – – – – – – – – – – – – – – 6.3 5 6.3 8 6 8 630 – – – – – – – – – – – – – – – – – – – 8 6 8 Ma/MH/ML 500 – – – – – – – – – – – – – – – – – – 5 8 – 7.5 630 to 1250 630 – – – – – – – – – – – – – – – – – – – 8 – 7.5 800 – – – – – – – – – – – – – – – – – – – – – – 1000 – – – – – – – – – – – – – – – – – – – – – 7.5 1250 – – – – – – – – – – – – – – – – – – – – – –
425
425
SELECTIVITY TaBLESSelectivity: electronic MEGaTIKEr with SEL on Low
upstream and MEGaTIKEr downstream
230V a.c.
MEgaTIkEr MEgaTIkEr upstream
downstream Ma250E Ma400E Ma630E Ma630 to 800ES (E) Ma800ES (E–S–T) Ma1250ES (E–S–T) Ma1600ES (E–S–T) MH250E MH400E MH630E MH630 to 800ES (E) MH800ES (E–S–T) MH1250ES (E–S–T) MH1600ES (E–S–T) ML250E ML400E ML630E
In (A) 40 63 100 160 250 160 250 400 630 630 800 630 800 1250 1600 Ma125 16-25 3.5 3.5 3.5 3.5 3.5 8 8 8 8 16 16 T T T T ME125B/N 40 – 3.5 3.5 3.5 3.5 6 6 6 6 16 16 T T T T 63 – – 3.5 3.5 3.5 6 6 6 6 16 16 T T T T 100-125 – – – 3.5 3.5 6 6 6 6 16 16 T T T T ME160B/N/H 25 3.5 3.5 3.5 3.5 3.5 8 8 8 8 20 20 T T T T ME250B/N/H 40 – 3.5 3.5 3.5 3.5 8 8 8 8 20 20 T T T T 63 – – 3.5 3.5 3.5 6 6 6 6 20 20 T T T T 100 – – – 3.5 3.5 6 6 6 6 20 20 T T T T 160 – – – – 3.5 – 6 6 6 20 20 T T T T 250 – – – – – – – 6 6 20 20 T T T T Ma/MH160 25 3.5 3.5 3.5 3.5 3.5 8 8 8 8 20 20 40 40 40 40 Ma/MH/ML250 40 – 3.5 3.5 3.5 3.5 8 8 8 8 20 20 40 40 40 40 63 – – 3.5 3.5 3.5 6 8 8 8 20 20 40 40 40 40 100 – – – 3.5 3.5 6 8 8 8 20 20 40 40 40 40 160 – – – – 3.5 – 8 8 8 20 20 40 40 40 40 250 – – – – – – – 6 6 20 20 40 40 40 40 Ma/MH/ML250E 40 – 0.63 1 1.6 2.5 8 8 8 8 20 20 40 40 40 40 63 – – 1 1.6 2.5 6 6 6 6 20 20 40 40 40 40 100 – – – 1.6 2.5 6 6 6 6 20 20 40 40 40 40 160 – – – – 2.5 – 6 6 6 20 20 40 40 40 40 250 – – – – – – – 6 6 20 20 40 40 40 40 Ma/MH/ML400 250-320 – – – – – – – 6 6 20 20 40 40 40 40 Ma/MH/ML630MT 400 – – – – – – – – 6 20 20 40 40 40 40 Ma/MH/ML400E 160 – – – – – – 5 5 5 20 20 40 40 40 40 Ma/MH/ML630E 250 – – – – – – – 5 5 20 20 40 40 40 40 400 – – – – – – – – 5 20 20 40 40 40 40 630 – – – – – – – – – – 20 – 40 40 40 Ma/MH/ML630 500 – – – – – – – – – 20 20 30 30 30 30 to 1250 630 – – – – – – – – – – 20 – 30 30 30 800-1000 – – – – – – – – – – – – – 30 30 1250 – – – – – – – – – – – – – – 30 Ma/MH630ES (E–S–T) 630 – – – – – – – – – – 20 – 20 20 20 Ma/MH800ES (E–S–T) 800 – – – – – – – – – – – – – 20 20 Ma/M1250ES (E–S–T) 1250 – – – – – – – – – – – – – – 20
400V a.c.
MEgaTIkEr MEgaTIkEr upstream
downstream Ma250E Ma400E Ma630E Ma630 to 800ES (E) Ma800ES (E–S–T) Ma1250ES (E–S–T) Ma1600ES (E–S–T) MH250E MH400E MH630E MH630 to 800ES (E) MH800ES (E–S–T) MH1250ES (E–S–T) MH1600ES (E–S–T) ML250E ML400E ML630E
In (A) 40 63 100 160 250 160 250 400 630 630 800 630 800 1250 1600 Ma125 16-25 3.5 3.5 3.5 3.5 3.5 8 8 8 8 T T T T T T ME125B 40 – 3.5 3.5 3.5 3.5 6 6 6 6 T T T T T T 63 – – 3.5 3.5 3.5 6 6 6 6 T T T T T T 100-125 – – – 3.5 3.5 6 6 6 6 T T T T T T ME125N 16-25 3.5 3.5 3.5 3.5 3.5 8 8 8 8 25 25 T T T T 40 – 3.5 3.5 3.5 3.5 6 6 6 6 25 25 T T T T 63 – – 3.5 3.5 3.5 6 6 6 6 25 25 T T T T 100-125 – – – 3.5 3.5 6 6 6 6 25 25 T T T T ME160B/N/H 25 3.5 3.5 3.5 3.5 3.5 8 8 8 8 20 20 T T T T ME250B/N/H 40 – 3.5 3.5 3.5 3.5 8 8 8 8 20 20 T T T T 63 – – 3.5 3.5 3.5 6 6 6 6 20 20 T T T T 100 – – – 3.5 3.5 6 6 6 6 20 20 T T T T 160 – – – – 3.5 – 6 6 6 20 20 T T T T 250 – – – – – – – 6 6 20 20 T T T T Ma160 25 3.5 3.5 3.5 3.5 3.5 8 8 8 8 20 20 T T T T Ma250 40 – 3.5 3.5 3.5 3.5 8 8 8 8 20 20 T T T T 63 – – 3.5 3.5 3.5 6 8 8 8 20 20 T T T T 100 – – – 3.5 3.5 6 8 8 8 20 20 T T T T 160 – – – – 3.5 – 8 8 8 20 20 T T T T 250 – – – – – – – 6 6 20 20 T T T T MH/ML160 25 3.5 3.5 3.5 3.5 3.5 8 8 8 8 20 20 30 30 30 36 MH/ML250 40 – 3.5 3.5 3.5 3.5 8 8 8 8 20 20 30 30 30 36 63 – – 3.5 3.5 3.5 6 8 8 8 20 20 30 30 30 36 100 – – – 3.5 3.5 6 8 8 8 20 20 30 30 30 36 160 – – – – 3.5 – 8 8 8 20 20 30 30 30 36 250 – – – – – – – 6 6 20 20 30 30 30 36 Ma250E 40 – 0.63 1 1.6 2.5 8 8 8 8 20 20 T T T T 63 – – 1 1.6 2.5 6 6 6 6 20 20 T T T T 100 – – – 1.6 2.5 6 6 6 6 20 20 T T T T 160 – – – – 2.5 – 6 6 6 20 20 T T T T 250 – – – – – – – 6 6 20 20 T T T T MH/ML250E 40 – 0.63 1 1.6 2.5 8 8 8 8 20 20 30 30 30 36 63 – – 1 1.6 2.5 6 6 6 6 20 20 30 30 30 36 100 – – – 1 2.5 6 6 6 6 20 20 30 30 30 36 160 – – – – 2.5 – 6 6 6 20 20 30 30 30 36 250 – – – – – – – 6 6 20 20 30 30 30 36 Ma400–630MT 250-320 – – – – – – – 6 6 15 15 20 20 20 T 400 – – – – – – – – 6 15 15 20 20 20 T 500 – – – – – – – – – 10 10 20 20 20 T 630 – – – – – – – – – – 10 20 20 T MH/ML400 250-320 – – – – – – – 6 6 15 15 20 20 20 36 MH/ML630MT 400 – – – – – – – – 6 15 15 20 20 20 36 500 – – – – – – – – – 10 10 20 20 20 36 630 – – – – – – – – – – 10 20 20 36 Ma400E 160 – – – – – – 5 5 5 15 15 20 20 20 T Ma630E 250 – – – – – – – 5 5 15 15 20 20 20 T 400 – – – – – – – – 5 15 15 20 20 20 T 630 – – – – – – – – – – 15 – 20 20 T MH/ML400E 160 – – – – – – 5 5 5 15 15 15 15 30 36 MH/ML630E 250 – – – – – – – 5 5 15 15 15 15 30 36 400 – – – – – – – – 5 15 15 20 20 20 36 630 – – – – – – – – – – 15 – 20 30 36 Ma/MH/ML630 500 – – – – – – – – – 15 15 10 15 15 20 to 1250 630 – – – – – – – – – – 15 – 20 20 20 800-1000 – – – – – – – – – – – – – 20 20 1250 – – – – – – – – – – – – – – 20 Ma/MH630ES (E–S–T) 630 – – – – – – – – – – 15 – 15 15 20 Ma/MH800ES (E–S–T) 800 – – – – – – – – – – – – – 15 20 Ma/MH1250ES (E–S–T) 1250 – – – – – – – – – – – – – – 20
427
427
SELECTIVITY TaBLESSelectivity: electronic MEGaTIKEr with SEL on Low
upstream and MEGaTIKEr downstream
500V a.c.
MEgaTIkEr MEgaTIkEr upstream
downstream Ma250E Ma400E Ma630E Ma630 to 800ES (E) Ma800ES (E–S–T) Ma1250ES (E–S–T) Ma1600ES (E–S–T) MH250E MH400E MH630E MH630 to 800ES (E) MH800ES (E–S–T) MH1250ES (E–S–T) MH1600ES (E–S–T) ML250E ML400E ML630E
In (A) 40 63 100 160 250 160 250 400 630 630 800 630 800 1250 1600 Ma125 16-25 3.5 3.5 3.5 3.5 3.5 T T T T T T T T T T 40 – 3.5 3.5 3.5 3.5 6 6 6 6 T T T T T T 63 – – 3.5 3.5 3.5 6 6 6 6 T T T T T T 100-125 – – – 3.5 3.5 6 6 6 6 T T T T T T ME125B 16-25 3.5 3.5 3.5 3.5 3.5 8 8 8 8 T T T T T T 40 – 3.5 3.5 3.5 3.5 6 6 6 6 T T T T T T 63 – – 3.5 3.5 3.5 6 6 6 6 T T T T T T 100-125 – – – 3.5 3.5 6 6 6 6 T T T T T T ME125N 16-25 3.5 3.5 3.5 3.5 3.5 8 8 8 8 12 12 T T T T 40 – 3.5 3.5 3.5 3.5 6 6 6 6 12 12 T T T T 63 – – 3.5 3.5 3.5 6 6 6 6 12 12 T T T T 100-125 – – – 3.5 3.5 6 6 6 6 12 12 T T T T ME160B/N 25 3.5 3.5 3.5 3.5 3.5 8 8 8 8 T T T T T T ME250B/N 40 – 3.5 3.5 3.5 3.5 8 8 8 8 T T T T T T 63 – – 3.5 3.5 3.5 6 6 6 6 T T T T T T 100 – – – 3.5 3.5 6 6 6 6 T T T T T T 160 – – – – 3.5 – 6 6 6 T T T T T T 250 – – – – – – – 6 6 T T T T T T ME160H 25 3.5 3.5 3.5 3.5 3.5 8 8 8 8 12 12 T T T T ME250H 40 – 3.5 3.5 3.5 3.5 8 8 8 8 12 12 T T T T 63 – – 3.5 3.5 3.5 6 6 6 6 12 12 T T T T 100 – – – 3.5 3.5 6 6 6 6 12 12 T T T T 160 – – – – 3.5 – 6 6 6 12 12 T T T T 250 – – – – – – – 6 6 12 12 T T T T Ma/MH160 25 3.5 3.5 3.5 3.5 3.5 8 8 8 8 12 12 T T T T Ma/MH/ML250 40 – 3.5 3.5 3.5 3.5 8 8 8 8 12 12 T T T T 63 – – 3.5 3.5 3.5 6 8 8 8 12 12 T T T T 100 – – – 3.5 3.5 6 8 8 8 12 12 T T T T 160 – – – – 3.5 – 8 8 8 12 12 T T T T 250 – – – – – – – 6 6 12 12 T T T T Ma/MH/ML250E 40 – 0.63 1 1.6 2.5 8 8 8 8 12 12 T T T T 63 – – 1 1.6 2.5 6 6 6 6 12 12 T T T T 100 – – – 1.6 2.5 6 6 6 6 12 12 T T T T 160 – – – – 2.5 – 6 6 6 12 12 T T T T 250 – – – – – – – 6 6 12 12 T T T T Ma/MH/ML400–630MT 250-320 – – – – – – – 6 6 12 10 T T T T 400 – – – – – – – – 6 12 10 T T T T 500 – – – – – – – – – – – – – – – 630 – – – – – – – – – – – – – – – Ma/MH/ML400E 160 – – – – – – 5 5 5 12 12 T T T T Ma/MH/ML630E 250 – – – – – – – 5 5 12 12 T T T T 400 – – – – – – – – 5 12 12 T T T T 630 – – – – – – – – – – 12 – T T T Ma/MH/ML630 500 – – – – – – – – – 12 12 T T T T to 1250 630 – – – – – – – – – – 12 – T T T 800-1000 – – – – – – – – – – – – – T T 1250 – – – – – – – – – – – – – – T Ma/MH630–800ES (E) 630 – – – – – – – – – – 12 – 20 20 20 800 – – – – – – – – – – – – – 20 20 Ma/MH630ES (E–S–T) 630 – – – – – – – – – – 20 – 20 20 20 Ma/MH800ES (E–S–T) 800 – – – – – – – – – – – – – 20 20 Ma/MH1250ES (E–S–T) 1250 – – – – – – – – – – – – – – 20
Selectivity: electronic MEGaTIKEr with SEL on high
upstream and MEGaTIKEr downstream
400V a.c.
MEgaTIkEr MEgaTIkEr upstream
downstream Ma400E Ma630E Ma630 to 800ES (E) Ma800ES (E–S–T) Ma1250ES (E–S–T) Ma1600ES (E–S–T) MH400E MH630E MH630 to 800ES (E) MH800ES (E–S–T) MH1250ES (E–S–T) MH1600ES (E–S–T) ML400E ML630E In (A) 160 250 400 630 630 800 630 800 1250 1600 ME125B 16 to 125 T T T T T T T T T T ME125N 16 to 125 T T T T T T T T T T ME160B/N/H* 25 to 160 T T T T T T T T T T ME250B/N/H* 250 – – T T T T T T T T Ma160 25 to 160 T T T T T T T T T T Ma250 250 – – T T T T T T T T MH/ML160 25 to 160 36 36 36 36 36 36 36 36 36 36 MH/ML250 250 – 36 36 36 36 36 36 36 36 36 Ma250E 40 to 160 T T T T T T T T T T 250 – T T T T T T T T T MH/ML250E 40 to 160 36 36 36 36 36 36 36 36 36 36 250 – 36 36 36 36 36 36 36 36 36 Ma400–630MT 250 – – 25 25 T T T T T T 320 to 500 – – – 25 T T T T T T 630 – – – – – T T T T MH/ML400 250 – – 25 25 36 36 36 36 36 36 MH/ML630MT 320 to 500 – – – 25 36 36 36 36 36 36 630 – – – – – 36 36 36 36 Ma400E 160-250 – 25 25 T T T T T T Ma630E 400 – – – 25 T T T T T T 630 – – – – – T – T T T MH/ML400E 160-250 – 25 25 36 36 36 36 36 36 MH/ML630E 400 – – – 25 36 36 36 36 36 36 630 – – – – – 36 – 36 36 36 Ma/MH/ML630 to 1250 500-630 – – – – – T – T T T 800-1000 – – – – – – – – T T 1250 – – – – – – – – – T Ma/MH630ES (E–S–T) 630 – – – – – 36 – 36 36 36 800 – – – – – – – – 36 36 Ma/MH800ES (E–S–T) 630 – – – – – 36 – 36 36 36 800 – – – – – – – – 36 36 Ma/MH1250ES (E–S–T) 1250 – – – – – – – – – 36 * For ME160H and ME250H, selectivity, with MEGATIKER upstream up to MA/MH/ML/630E, is equal to 36.
