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Utilization Category | Type of Application |
AC-1 | Non-inductive or slightly inductive loads, example: resistive furnaces, heaters |
AC-2 | Slip-ring motors: switching off |
AC-3 | Squirrel-cage motors: starting, switches off motors during running time |
AC-4 | Squirrel-cage motors: starting, plugging, inching |
AC-5a | Switching of discharge lamps |
AC-5b | Switching of incandescent lamps |
AC-6a | Switching of transformers |
AC-6b | Switching of capacitor banks |
AC-7a | Slightly inductive loads in household appliances: examples: mixers, blenders |
AC-7b | Motor-loads for household appliances: examples: fans, central vacuum |
AC-8a | Hermetic refrigerant compressor motor control with manual resetting overloads |
AC-8b | Hermetic refrigerant compressor motor control with automatic resetting overloads |
AC-12 | Control of resistive loads and solid state loads with opto-coupler isolation |
AC-13 | Control of solid state loads with transformer isolation |
AC-14 | Control of small electromagnetic loads |
AC-15 | Control of A.C. electromagnetic loads |
AC-20 | Connecting and disconnecting under no-load conditions |
AC-21 | Switching of resistive loads, including moderate overloads |
AC-22 | Switching of mixed resistive and inductive loads, including moderate overloads |
AC-23 | Switching of motor loads or other highly inductive loads |
A | Protection of circuits, with no rated short-time withstand current |
B | Protection of circuits, with a rated short-time withstand current |
DC-1 | Non Inductive or slightly inductive loads, resistance furnaces, heaters |
DC-3 | Shunt-motors, starting, plugging(1), inching(2), dynamic braking of motors |
DC-5 | Series-motors, starting, plugging(1), inching(2), dynamic braking of motors |
DC-6 | Switching of incandescent lamps |
DC-12 | Control of resistive loads and solid state loads with opto-coupler isolation |
DC-13 | Control of D.C. electromagnetics |
DC-14 | Control of D.C. electromagnetic loads having economy resistors in the circuit |
DC-20 | Connecting and disconnecting under no-load conditions |
DC-21 | Switching of resistive loads, including moderate overloads |
DC-22 | Switching of mixed resistive and inductive loads, including moderate overloads (i.e. shunt motors) |
DC-23 | Switching of highly inductive loads (i.e. series motors) |
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![]() | Företagare, Elinstallatör | Björks EL i Skellefteå AB |
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