Contactor Rating IEC utilization categories - Type of application

Contactor Rating 

IEC utilization categories

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, Jogging

AC-5a    Switching of discharge lamps

AC-5b    Switching of incandescent lamps

AC-6a    Switching of transfomers

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 resisitive 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 breaking of motors

DC-5      Series-motors, starting, plugging(1), inching(2), dynamic breaking 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)

Elevator rating

CSA B44.1/ASM 19.2.1. On load rating

CSA B44.1/ASM 19.2.2. On unload rating

Thermal overload Class

Tripping curves as standardized in classes acc to IEC 60947-4

Class10A : 2-10Sec

Class10    : 4-10Sec

Class20    : 6-20Sec

Class30    : 9-30Sec

Contactor IEC / NEMA

Nema 00 = Iec 25a or 7.5hp 600vac.

Nema 0 = Iec 28a or 10hp 600vac.

Nema 1 = Iec 45a or 20hp 600vac.

Nema 2 = Iec 80a or 50hp 600vac.

Nema 3 = Iec 105a or 75hp 600vac.

Nema 4 = Iec 230a or 125hp 600vac.

Nema 5 = Iec 350a or 250hp 600vac.

Nema 6 = Iec 650a or 500hp 600vac.

Nema 7 = Iec 900a or 700hp 600vac.

Nema 8 = Iec 1650a or 1150hp 600vac

Contactor application Type

Type A

Disconect / Fuse / Contactor / Overload

 Type B

Disconect / Circuit breaker / Contactor / Overload

 Type C  

Circuit breaker Thermo-Magnetic inverse-time has disconect and protection include

Circuit Breaker / contactor / Overload

 Type D

Circuit breaker Instantaneous trip  magnetic only /  has disconect and protection include

Circuit Breaker / contactor / Overload

 Type E  

Manual motor starter with type E adaptor

Remplace disconect/fuse or breaker/controle manual/overload

 Type F 

Manual motor starter with type E adaptor  / contactor 

3JIndustry Specialized Distributor - Buy & Sales Used Products

Email : Sales@3JIndustry.com

← Previous Post Next Post →