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18/100 IZM circuit-breakers, IN switch-disconnectors
Circuit-breaker IZM26
2010 CA08103002Z-EN
www.eaton.comCircuit-breaker IZM26
IZM20B…08… IZM20B…10… IZM20B…12…
General
Standards
IEC/EN 60947
Ambient temperature
Storage
°C -40 - +70 (Devices with LCD display -20 - +70)
Operation (open)
°C -25 - +70 (Devices with LCD display -20 - +70)
Built-in position
Utility category
B
B
B
Protection type
IP20, IP54 with protective cover
Direction of incoming supply
Any
Main contacts
Rated operational current = Rated uninterrupted current
I
n
= I
u
A 800
1000
1250
Rated uninterrupted current at 50 °C
1)
I
u
A 800
1000
1250
Rated uninterrupted current at 60 °C
1)
I
u
A 800
1000
1100
Rated uninterrupted current at 70 °C
1)
I
u
A 800
1000
1000
Rated impulse withstand voltage
U
imp
V AC 8000
8000
8000
Rated operational voltage
U
e
V AC 690
690
690
Use in IT electrical power networks up to U = 440 V
I
IT
kA 21
21
21
Use in IT electrical power networks up to U = 690 V
I
IT
kA –
–
–
Overvoltage category/pollution degree
III/3
III/3
III/3
Rated insulation voltage
U
i
V
1000
1000
1000
Switching capacity
Rated short-circuit making capacity
Up to 440 V 50/60 Hz I
cm
kA 105
105
105
Up to 690 V 50/60 Hz I
cm
kA 105
105
105
Rated short-time withstand current 50/60 Hz
t = 1 s
I
cw
kA 50
50
50
t = 3 s
I
cw
kA –
–
–
Rated short-circuit breaking capacity I
cn
IEC/EN 60947 Operating sequence I
cu
O-t-CO
Up to 240 V 50/60 Hz
I
cu
kA 50
50
50
Up to 440 V 50/60 Hz
I
cu
kA 50
50
50
Up to 690 V 50/60 Hz
I
cu
kA 50
50
50
Up to 1100 V 50/60 Hz
I
cu
kA –
–
–
IEC/EN 60947 Operating sequence I
cs
O-t-CO-t-CO
Up to 240 V 50/60 Hz
I
cs
kA 50
50
50
Up to 440 V 50/60 Hz
I
cs
kA 50
50
50
Up to 690 V 50/60 Hz
I
cs
kA 50
50
50
Up to 1100 V 50/60 Hz
I
cs
kA –
–
–
Switching times
Total opening delay
ms
30
30
30
Closing delay
ms
35
35
35
Closing delay electrical (via closing release)
ms
40
40
40
Opening delay electrical ( via shunt release / undervoltage release)
ms
35/70
35/70
35/70
Opening delay via trip electronics (non-delayed short-circuit release)
ms
35
35
35
Durability
Mechanical, without maintenance
Operations
12500
12500
12500
Mechanical, with maintenance
Operations
20000
20000
20000
Electrical, without maintenance
Operations
10000
10000
10000
Electrical, with maintenance
Operations
10000
10000
10000
Maximum operating frequency
Operations/h
60
60
60
Heat dissipation at rated operational current I
n
3-phase symmetric loading
Fixed
W 60
95
150
Withdrawable
W 110
170
260
Weight
Fixed
3 pole
kg
43
43
43
4 pole
kg
54
54
54
Withdrawable
3 pole
kg
48
48
48
4 pole
kg
62
62
62
Empty cassette
3 pole
kg
34
34
34
4 pole
kg
38
38
38
Notes
1)
Permissible continuous current for circuit-breakers used at different temperatures within switchgear.
The expected internal temperatures can be estimated according to the applicable IEC regulations.
30˚ 30˚
30˚ 30˚
IZM…