Motor Protection Circuit Breaker
J7MN
I-7
L
o
w vol
tage
switch
gear
Technical Data according to IEC/EN 60947-1, 60947-2, 60947-4-1 and VDE 0660
Main Circuit
Conductor cross-sections for main circuit
Type
J7MN-3P
J7MN-3R
J7MN-6R
J7MN-9R
Number of poles
3
Max. rated current Inmax (=max. rated operational current Ie)
32 A
32 A
63 A
100 A
Permissible ambient temperature
Storage/transport
-50 to +80°C
Operation
-20 to +60°C
Storage/transport
-58 to +176°F
Operation
-4 to +140°F
Rated insulation voltage Ui
690 V
*1
*1
Suitable at 690 V for: earthed-neutral systems, overvoltage category I to IV, pollution degree 3 (standard-industry): U
imp
= 6 kV.
1000 V
*2
*2
Suitable at 1000 V for: earthed-neutral systems, overvoltage category I to IV, pollution degree 3 (standard-industry): U
imp
= 8 kV.
Data for other conditions on request.
Rated impulse withstand voltage Uimp
6 kV
8 kV
Rated operational voltage Ue
690 V
Rated frequency
50/60 Hz
Utilization category
IEC 60 947-2 (circuit-breaker)
A
IEC 60 947-4-1 (motor starter)
AC3
Class
acc. to IEC 60 947-4-1
10
Power loss Pv per circuit-breaker
In -> up to 4 A
9.8 W
-
dependent on rated current In
In -> 6 up to 26 A
8 W
-
(upper setting range)
In -> 32 A
3.9 W
-
R per conducting path = P/I² × 3
In -> 26 up to 63 A
-
-
12.6 W
-
In -> up to 63 A W
-
-
-
11.9 W
In -> 75 up to 100 A
-
-
-
15 W
Shock resistance
acc. to IEC 68 Part 2-27
25 g
Degree of protection
acc. to IEC 60 529
IP 20
Shock hazard protection
acc. to DIN VDE 0106 Part 100
safe against finger touch
Weight
0.32 kg
0.36 kg
1 kg
2.2 kg
Temperature compensation
acc. to IEC 60 947-4-1
-20 to +60°C
Mechanical endurance
operating cycles
100,000
50,000
Electrical endurance
operating cycles
100,000
25,000
Max. operating frequency per hour (motor starts) 1/h
25
Type
J7MN-3
J7MN-6
J7MN-9
Screw type, terminal type
Pz2
Pz2
4 mm hexagon socket
screw
Tightening torque
0.8 to 2.5 Nm
3 to 4.5 Nm
4 to 6 Nm
7 to 22 lb-in
26 to 39 lb-in
35 to 53 lb-in
Conductor cross-sections
solid
1 x (1 to 10) mm²
1 x (0.75 to 35) mm²
1 x (2.5 to 70) mm²
2 x (1 to 6) mm²
2 x (0.75 to 25) mm²
2 x (2.5 to 50) mm²
1 x (18 to 8) AWG
1 x (18 to 2) AWG
1 x (12 to 2/0) AWG
2 x (18 to 10) AWG
2 x (18 to 4) AWG
2 x (12 to 1/0) AWG
stranded
1 x (1 to 6) mm²
1 x (0.75 to 35) mm²
1 x (2.5 to 70) mm²
2 x (1 to 6) mm²
2 x (0.75 to 25) mm²
2 x (2.5 to 50) mm²
1 x (18 to 10) AWG
1 x (18 to 2) AWG
1 x (12 to 2/0) AWG
2 x (18 to 10) AWG
2 x (18 to 4) AWG
2 x (12 to 1/0) AWG
flexible
1 x (1 to 6) mm²
1 x (0.75 to 25) mm²
1 x (2.5 to 50) mm²
2 x (0.75 to 4) mm²
2 x (0.75 to 16) mm²
2 x (2.5 to 35) mm²
1 x (18 to 10) AWG
1 x (18 to 4) AWG
1 x (12 to 1/0) AWG
2 x (18 to 10) AWG
2 x (18 to 6) AWG
2 x (10 to 2) AWG
