| AC Category | Typical Application | Switchgear Standard |
|---|
| AC 1 | Non Inductive or Slightly inductive loads, with Power Factor greater than 0.95, eg: Resistive load, heating. Switchgear: Electromechanical contactors. Operation: Switching. | IEC 60947-4-1 |
| AC 2 | Slip-ring motor.Switchgear: Electromechanical contactors. Operation: Switching off. | IEC 60947-4-1 |
| AC 3 | Squirrel cage motors. Switchgear: Electromechanical contactors. Operation : Starting, Switching off during running. | IEC 60947-4-1 |
| AC 4 | Squirrel cage motor. Switchgear: Electromechanical contactors. Operation: Starting, Plugging, Inching. | IEC 60947-4-1 |
| AC 5a | Discharge lamps. Switchgear: Electromechanical contactors. Operation: Switching. | IEC 60947-4-1 |
| AC5b | Incandescent lamps. Switchgear: Electromechanical contactors. Operation: Switching. | IEC 60947-4-1 |
| AC 6a | Transformers. Switchgear: Electromechanical contactors. Operation: Switching. | IEC 60947-4-1 |
| AC 6b | Capacitor banks. Switchgear: Electromechanical contactors. Operation: Switching. | IEC 60947-4-1 |
| AC 7a | Slightly Inductive Household load, eg. Mixer. Switchgear: Electromechanical contactors for household purpose, eg. Miniature Contactor. Operation: Switching. | IEC 61095 |
| AC 7b | Household motor loads, eg; Fan, Vaccume pump motor. Switchgear: Electromechanical contactors for household purpose, eg. Miniature Contactor. Operation: Switching, occasional inching, plugging | IEC 61095 |
| AC 7c | Compensated electric discharge lamp control. Switchgear: Electromechanical contactors for household purpose, eg. Miniature Contactor. Operation: Switching. | IEC 61095 |
| AC 8a | Hermetic refrigerant compressor motor. Switchgear: Electromechanical contactors. Operation: Manual resetting overload control. | IEC 60947-4-1 |
| AC 8b | Hermetic refrigerant compressor motor. Switchgear: Electromechanical contactors. Operation: Automatic resetting overload control. | IEC 60947-4-1 |
| AC 12 | Resistive and solid state load with Opto-coupler Isolation. Switchgear: Electromechanical control circuit devices, eg. Aux Contacts. Operation: Switching, Control. | IEC 60947-5-1 |
| AC 13 | Solid state load with transformer Isolation. Switchgear: Electromechanical control circuit devices, eg. Aux Contacts. Operation: Switching, Control. | IEC 60947-5-1 |
| AC 14 | Small Electromagnetic loads. Switchgear: Electromechanical control circuit devices, eg. Aux Contacts. Operation: Switching, Control. | IEC 60947-5-1 |
| AC 15 | AC Electromagnetic loads. Switchgear: Electromechanical control circuit devices, eg. Aux Contacts. Operation: Switching, Control. | IEC 60947-5-1 |
| AC 20A | All. Switchgear: Switches, disconnectors, switch-disconnectors. Operation: Switching under no load condition. Frequent operation. | IEC 60947-3 |
| AC 20B | All. Switchgear: Switches, disconnectors, switch-disconnectors. Operation: Switching. Infrequent operation. | IEC 60947-3 |
| AC 21A | Resistive load with moderate overload. Switchgear: Switches, disconnectors, switch-disconnectors. Operation: Switching. Frequent operation. | IEC 60947-3 |
| AC 21B | Resistive load with moderate overload. Switchgear: Switches, disconnectors, switch-disconnectors. Operation: Switching. Infrequent operation. | IEC 60947-3 |
| AC 22A | Mix Resistive and Inductive loads with moderate overload. Switchgear: Switches, disconnectors, switch-disconnectors. Operation: Switching. Frequent operation. | IEC 60947-3 |
| AC 22B | Mix Resistive and Inductive loads with moderate overload. Switchgear: Switches, disconnectors, switch-disconnectors. Operation: Switching. Infrequent operation. | IEC 60947-3 |
| AC 23A | Highly Inductive load, eg: Motor. Switchgear: Switches, disconnectors, switch-disconnectors. Operation: Switching. Frequent operation. | IEC 60947-3 |
| AC 23B | Highly Inductive load, eg: Motor. Switchgear: Switches, disconnectors, switch-disconnectors. Operation: Switching. Infrequent operation. | IEC 60947-3 |
| AC 31A | Non Inductive, slightly inductive. Switchgear: Multiple function equipment – Transfer switching equipment, eg: ATS Operation: Switching. With no rated short time withstand capacity. | IEC 60947-6-1 |
| AC 31B | Non Inductive, slightly inductive. Switchgear: Multiple function equipment – Transfer switching equipment, eg: ATS Operation: Switching. With rated short time withstand capacity. | IEC 60947-6-1 |
| AC 32A | Mixed resistive and slightly inductive load with moderate overload. Switchgear: Multiple function equipment – Transfer switching equipment, eg: ATS Operation: Switching. With no rated short time withstand capacity. | IEC 60947-6-1 |
| AC 32B | Mixed resistive and slightly inductive load with moderate overload. Switchgear: Multiple function equipment – Transfer switching equipment, eg: ATS Operation: Switching. With rated short time withstand capacity. | IEC 60947-6-1 |
| AC 33A | Highly Inductive load, eg: Motor. Switchgear: Multiple function equipment – Transfer switching equipment, eg: ATS Operation: Switching. With no rated short time withstand capacity. | IEC 60947-6-1 |
| AC 33B | Highly Inductive load, eg: Motor. Switchgear: Multiple function equipment – Transfer switching equipment, eg: ATS Operation: Switching. With rated short time withstand capacity. | IEC 60947-6-1 |
| AC 35 | Electric discharge lamp. Switchgear: Multiple function equipment – Transfer switching equipment, eg: ATS Operation: Switching. | IEC 60947-6-1 |
| AC 36 | Incandescent lamp. Switchgear: Multiple function equipment – Transfer switching equipment, eg: ATS. Operation: Switching. | IEC 60947-6-1 |
| AC 40 | Mix Resistive and Inductive loads. Switchgear: CPS-Control and protective switching devices, eg. Integral Contactor breaker. Operation: Control & Switching. | IEC 60947-6-2 |
| AC 41 | Non Inductive, slightly inductive. eg: resistance furnace. Switchgear: CPS-Control and protective switching devices, eg. Integral Contactor breaker. Operation: Control & Switching. | IEC 60947-6-2 |
| AC 42 | Slip-ring motor. Switchgear: CPS-Control and protective switching devices, eg. Integral Contactor breaker. Operation: Control & Switching. | IEC 60947-6-2 |
| AC 43 | Squirrel cage motors. Switchgear: CPS-Control and protective switching devices, eg. Integral Contactor breaker. Operation: Starting, Switching off during running. | IEC 60947-6-2 |
| AC 44 | Squirrel cage motors. Switchgear: CPS-Control and protective switching devices, eg. Integral Contactor breaker. Operation: Starting, Plugging, Inching. | IEC 60947-6-2 |
| AC 45A | Electric discharge lamp. Switchgear: CPS-Control and protective switching devices, eg. Integral Contactor breaker. Operation: Control & Switching. | IEC 60947-6-2 |
| AC 45B | Incandescent Switchgear: CPS-Control and protective switching devices, eg. Integral Contactor breaker. Operation: Control & Switching. | IEC 60947-6-2 |
| AC 51A | Non Inductive or Slightly inductive loads. Switchgear: AC semiconductor motor controllers and starters, eg. Soft Starter. Operation: Switching. | IEC 60947-4-2 |
| AC 51B | Non Inductive or Slightly inductive loads. Switchgear: AC semiconductor motor controllers and starters, eg. Soft Starter. Operation: Switching. | IEC 60947-4-2 |
| AC 52A | Slip ring motor. Switchgear: AC semiconductor motor controllers and starters, eg. Soft Starter. Operation: Control of slip ring motor stators for 8 hour duty with on load current for start, acceleration & run. | IEC 60947-4-2 |
| AC 52B | Slip ring motor. Switchgear: AC semiconductor motor controllers and starters, eg. Soft Starter. Operation: Bypassed during motor running. | IEC 60947-4-2 |
| AC 53A | Control of squirrel cage Induction motor on 8 hour duty with on load currentfor start, acceleration and run. Switchgear: AC semiconductor motor controllers and starters, eg. Soft Starter. | IEC 60947-4-2 |
| AC 53B | Control of squirrel cage induction motors on intermittent duty. Switchgear: AC semiconductor motor controllers and starters, eg. Soft Starter.Operation: Soft-Starter Control. These Soft starters are bypassed during motor running. | IEC 60947-4-2 |
| AC 55A | Electric Discharge lamp. Switchgear: AC semiconductor controllers and contactors for non-motor loads, eg. IGBT. Operation: Switching. | IEC 60947-4-3 |
| AC 55B | Incandescent Switchgear: AC semiconductor controllers and contactors for non-motor loads, eg. IGBT. Operation: Switching. | IEC 60947-4-3 |
| AC 56A | Transformer. Switchgear: AC semiconductor controllers and contactors for non-motor loads, eg. IGBT. Operation: Switching. | IEC 60947-4-3 |
| AC 56B | Capacitor bank. Switchgear: AC semiconductor controllers and contactors for non-motor loads, eg. IGBT. Operation: Switching. | IEC 60947-4-3 |
| AC 58A | Hermetic refrigerant compressor motor with automatic resetting of overload releases. Switchgear: AC semiconductor motor controllers and starters, eg. Soft Starter. Operation: Control for 8 hour duty with on load current for start, acceleration & run. | IEC 60947-4-2 |
| AC 58B | Hermetic refrigerant compressor motor with automatic resetting of overload releases. Switchgear: AC semiconductor motor controllers and starters, eg. Soft Starter. Operation: Start of Motor, then bypassed during motor running. | IEC 60947-4-2 |
| AC 140 | Small electromagnetic loads with holding (closed) current 0.2A or less. Switchgear: Control circuitdevices and switching elements – Proximity switches, eg. contactor relays Operation: Switching. | IEC 60947-5-2 |
