protect general presentation of NG125

load protection circuit-breakers

circuit-breaker functions in electrical distribution

direct outgoers
local load protection

high
power
incomer
switchboards 2501600 A > 32 kA

main direct
line
incomer outgoers
outgoers
1080 A
50400 A

loads

medium
power incomer incomer
50160 A 1535 kA 50400 A 2570 kA
switchboards

direct
line direct line outgoers
main 1050 A
outgoers outgoers outgoers
incomer
50125 A 5080 A 50125 A

loads loads

final switchboard incomer

final
switchboards
incomer incomer
50125 A 50125 A
325 kA 325 kA

final final
outgoers outgoers
1032 A 1032 A

loads loads

90230E.fm/2 Updated: 09/11/99 Schneider Electric

 protect general presentation of NG125
load protection circuit-breakers

modular switchboard incomer: overview of the Merlin Gerin solutions

The NG125 range is the first to offer # extensive choice of indication functions for Schneider is thus the only manufacturer to
protection specially designed for the modular local or remote enclosure monitoring, propose a complete offer specifically
enclosure incomer. Combined with the # rapid, safe intervention, designed for the modular enclosure incomer.
Distribloc splitter, it enables rapid production # a selective option for outgoers, providing
of an "incomer" assembly providing users optimum continuity of supply.
with all the functions they require:

rated with protection

current circuit-breaker residual current circuit-breaker residual current device

160 A + T R + T R

Compact NSA160 Vigicompact NSA160NA Vigicompact NSA160

125 A
M ERLIN
NG125
GERIN

I . ON
M ERLIN
NG125
GERIN

I . ON
+
+ test mensuel

test monthly

set
10
40
60

80
I
n
0,3

A
0,5

3
1
s

01

t (ms)
60

150
vigi

I/S/S+
L

0,3A
125
3A

-25
C
dconnecter

avant
test

dilectrique

disconnect

for

dielectric

test

27508
M ERLIN
NG125
GERIN

I . ON
++ test mensuel

test monthly

10
40
60

80
I
n
0,3
0,5

3
1
s

01
60

t (ms)
150
vigi

I/S/S+
L

0,3A
125
3A

-25
C
dconnecter

avant
test

dilectrique

disconnect

for

dielectric

test

27508

set A

n (%)
I n (%)
I

NG125 Vigi NG125NA Vigi NG125

+
O-OFF
O-OFF
T
OFF
O-OFF
O-OFF
+ T

C120 ID100/125 Vigi C120

functions

manual operating # # #
mechanism

isolation # # #

remote # # #
opening

overcurrent # #
protection

earth leakage # #
protection

Schneider Electric Updated: 09/11/99 90230E.fm/3

 protect general presentation of NG125
load protection circuit-breakers

without protection installation

switch-disconnector trip-free switch-disconnector

.1
.2
.4

Interpact INS160 Compact NSA160NA + auxiliaries on rail

.1
.2
.4

Interpact INS125

M ERLIN
NG125
GERIN multi 9
Mg modular
+
MX

I . ON

installation
system

NG125NA + auxiliaries

I125

# #

# #

90230E.fm/4 Updated: 09/11/99 Schneider Electric

 protect general presentation of NG125
load protection circuit-breakers

terminal screw
shield shield

special
70 mm2
lug

comb insulated tunnel terminal accessories for lugs and busbars

busbars sub- for 70 mm2
distribution aluminium
terminal cable
MXV
auxiliary
SDV
auxiliary

GERIN
MERLIN
NG125

6T3

auxiliaries circuit-breaker or switch

Vigi module
fixed
adjustable

Vigi module
terminal shields

distribloc rotary handle

splitter

additional
information

Schneider Electric Updated: 09/11/99 90230E.fm/5

 protect NG125N circuit-breakers
circuit protection B, C and D curves
IEC 60947-2: 25 kA

function This circuit-breaker is specially designed for

functions requiring a high breaking capacity
(up to 25 kA):
- modular enclosure incomer,
- main incomer in sub-distribution
switchboards,
- outgoer, protection of loads directly
supplied by a power switchboard.

description common technical data # weight (g):

# rating: 10125 A type 1P 2P 3P 4P
# reference temperature: 40 C
# Uimp: 8 kV 240 480 720 960
# Ui: 690 V
# maximum voltage rating: 500 V AC # compatible with the Pragma F24 and
# breaking capacity: Prisma G/GX enclosures and the Prisma P
as in IEC 60947.2 cabinets,
type voltage breaking capacity #degree of protection: IP20B (IP40D for the
(V AC) (A) part outside the enclosure)
# connection:
1P 220240 25000
5 6 63 A ratings: tunnel terminals for 1.5 to
1P 380415 6000 (1) 50 mm2 copper cables
2, 3, 4P 380415 25000
(1) 1-pole breaking capacity in the IT isolated
5 80 to 125 A ratings: tunnel terminals for 16
to 70 mm2 copper cables
neutral system (double fault).
5 aluminium cables, copper cables with lug
or busbar (see connection accessories)
# isolation with positive break indication
# 3-position toggle: open-tripped-closed 5 on 3P and 4P: upstream voltage taps on
# built-in padlocking facility on 3P and 4P each pole, by 6.35 mm Fast-on lugs, for
auxiliary circuit supply
# fault display on front face by:
5 fault indicator
5 position of toggle: tripped B curve
# the magnetic trip units operate at
# test button to check proper operation of 4 In 20 %
the tripping mechanism
# fast closing C curve
# electrical durability: 10 000 cycles at In # the magnetic trip units operate at
# tropicalisation as in IEC 68.1: treatment 2 8 In 20 %
(relative humidity: 95 % at 55 C)
D curve
# the magnetic trip units operate at
12 In 20 %

catalogue numbers type rating catalogue width

(A) number in mod.
of 9 mm
NG125N B curve

3P 80 18663 9
1 3 5 100 18664 9
125 18665 9

2 4 6

4P 80 18666 12
1 3 5 7 100 18667 12
125 18668 12

2 4 6 8

90233E.fm/2 Updated: 5/07/01 Schneider Electric

 protect NG125N circuit-breakers
circuit protection B, C and D curves
IEC 60947-2: 25 kA

catalogue numbers type rating

(A)
catalogue
number
width
in mod.
of 9 mm
NG125N C curve

1P 10 18610 3
16 18611 3
20 18612 3
1 25 18613 3
32 18614 3
40 18615 3
50 18616 3
63 18617 3
80 18618 3

18617 2

2P 10 18621 6
1 3 16 18622 6
20 18623 6
25 18624 6
32 18625 6
40 18626 6
50 18627 6
63 18628 6
80 18629 6
2 4

18628

3P 10 18632 9
1 3 5 16 18633 9
20 18634 9
25 18635 9
32 18636 9
40 18637 9
50 18638 9
63 18639 9
2 4 6 80 18640 9
100 18642 9
125 18644 9
18644

3P + N 80 18646 12
100 18647 12
N 1 3 5 125 18648 12

N 2 4 6
18648

4P 10 18649 12
16 18650 12
1 3 5 7 20 18651 12
25 18652 12
32 18653 12
40 18654 12
50 18655 12
63 18656 12
80 18658 12
100 18660 12
2 4 6 8
125 18662 12
18662

Schneider Electric Updated: 5/07/01 90233E.fm/3

 protect NG125N circuit-breakers
circuit protection B, C and D curves
IEC 60947-2: 25 kA

catalogue numbers type rating

(A)
catalogue
number
width
in mod.
of 9 mm
NG125N D curve

3P 80 18669 9
1 3 5 100 18670 9
125 18671 9

2 4 6

4P 80 18672 12
1 3 5 7 100 18673 12
125 18674 12

2 4 6 8

additional auxiliaries: page 90250/2

dimensions: page 90148/2
derating: page 92515/2
information accessories: page 90251/2
tripping curves: page 90180/2
Vigi module: page 90243/2
discrimination table: page 92511/2

90233E.fm/4 Updated: 5/07/01 Schneider Electric

 circuit protection NG125H circuit-breakers
circuit-breakers up to 80 A C curve
IEC 947.2: 36 kA

function This circuit-breaker is specially designed for

functions requiring a high breaking capacity
(up to 36 kA):
- main incomer in the sub-distribution
switchboards;
- outgoer, protection of loads directly
supplied by a power switchboard.

description common technical data # electrical durability: 10 000 cycles at In

# rating: 1080 A # tropicalisation as in IEC 68.1:
# reference temperature: 40 C treatment 2 (relative humidity: 95 %
# Uimp: 8 kV at 55 C)
# Ui: 690 V # weight (g):
# maximum voltage rating: 500 V AC type 1P 2P 3P 4P
# breaking capacity:
as in IEC 947.2 240 480 720 960
type voltage breaking capacity
(V) AC (A) # compatible with Pragma F24 and Prisma
G/GX enclosures and Prisma P cabinets
1P 220240 36000 # degree of protection: IP20B (IP40D for the
1P 380415 9000 (1) part outside the enclosure)
2, 3, 4P 380415 36000 # connection:
(1) 1-pole breaking capacity in the IT isolated 5 6 63 A ratings: tunnel terminals for 1.5 to
neutral system (double fault). 50 mm2 copper cables
5 80 A rating: tunnel terminals for 16 to
# isolation with positive break indication 70 mm2 copper cables
# 3-position toggle: open-tripped-closed 5 connection of aluminium cables, copper
# built-in padlocking facility on 3P and 4P cables with lug or busbar for 3P and 4P (see
# fault display on front face by: connection accessories)
5 fault indicator 5 upstream voltage taps on each pole, by
5 position of toggle: tripped 6.35 mm Fast-on lugs, for auxiliary circuit
# test button to check proper operation of supply
the tripping mechanism
# fast closing C curve
# the magnetic trip units operate at
8 In 20 %

catalogue numbers type rating catalogue width

(A) number in mod.
of 9 mm
NG125H C curve

1P 10 18705 3
1 16 18706 3
20 18707 3
25 18708 3
32 18709 3
40 18710 3
50 18711 3
63 18712 3
80 18713 3
18712 2

2P 10 18714 6
1 3 16 18715 6
20 18716 6
25 18717 6
32 18718 6
40 18719 6
50 18720 6
63 18721 6
2 4 80 18722 6

18721

90236E.fm/2 Updated: 09/11/99 Schneider Electric

 circuit protection NG125H circuit-breakers
circuit-breakers up to 80 A C curve
IEC 947.2: 36 kA

catalogue numbers type rating catalogue width

(A) number in mod.
of 9 mm
NG125H C curve (continued)

3P 10 18723 9
1 3 5 16 18724 9
20 18725 9
25 18726 9
32 18727 9
40 18728 9
50 18729 9
63 18730 9
2 4 6 80 18731 9
18730

4P 10 18732 12
1 3 5 7 16 18733 12
20 18734 12
25 18735 12
32 18736 12
40 18737 12
50 18738 12
63 18739 12
2 4 6 8 80 18740 12

18739

auxiliaries: page 90250/2 dimensions: page 90148/2

additional accessories: page 90251/2 derating: page 92515/2
Vigi module: page 90243/2 tripping curves: page 90180/2
information discrimination table: page 92511/2

Schneider Electric Updated: 09/11/99 90236E.fm/3