moeller.net
| Type of current
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Utilization category
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Typical applications:
I = switch-on current,
Ic = Switch-off current,
Ie = Rated operational current,
U = voltage,
Ue = Rated operational voltage,
Ur = Recovery voltage
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Verification of switching capacity
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| Switch on
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Switch off
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cos φ
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cos φ
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| Alternating current
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AC-20 A(B)1)
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Making and breaking without load
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All values
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1)
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1)
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1)
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1)
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| AC-21 A(B)1)
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Switching resistive loads including low overloads
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All values
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1.5
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1.05
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0.95
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1.5
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1.05
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0.95
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| AC-22 A(B)1)
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Switching mixed resistive and inductive loads including low overloads
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All values
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3
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1.05
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0.65
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3
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1.05
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0.65
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| AC-23 A(B)1)
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Switching motors and other highly inductive loads
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Ie ≤100
Ie > 100
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10
10
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1.05
1.05
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0.45
0.35
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8
8
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1.05
1.05
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0.45
0.35
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L/R
ms
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L/R
ms
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| Direct current
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DC-20 A(B)1)
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Making and breaking without load
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All values
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1)
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1)
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1)
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1)
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1)
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1)
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| DC-21 A(B)1)
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Switching resistive loads including low overloads
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All values
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1.5
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1.05
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1
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1.5
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1.05
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1
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| DC-22 A(B)1)
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Switching mixed resistive and inductive loads, including low overloads (e.g. shunt motors)
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All values
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4
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1.05
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2.5
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4
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1.05
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2.5
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| DC-23 A(B)1)
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Switching highly inductive loads (e.g. series motors)
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All values
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4
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1.05
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15
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4
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1.05
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15
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| 1) A: Frequent operation, B: Occassional operation.
For load-break switches, switch-disconnectors and switch-fuse units to Switch-disconnectors that are suitable for switching motors are also tested according to the criteria stated in → section Utilisation categories for contactors and motor starters. |
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