Page 404 - Motor protection and control Manual motor starters, contactors and overload relays
P. 404

3/330            ABB  MOTOR PROTECTION AND CONTROL

          —

          Auxiliary contacts
          Electrical durability




          Electrical Durability for AC-15 Utilization Category
   03
          AC-15 utilization category according to IEC 60947-5-1 / EN 60947-5-1:
          •  making current: 10 x Ie with cos ϕ = 0.7 and Ue
          •  breaking current: Ie with cos ϕ = 0.4 and Ue.
          This curve represents the electrical durability of the auxiliary contacts in relation to the breaking current.
          The curve has been drawn for resistive and inductive loads up to 690 V, 40...60 Hz.



              30
              20
              10
              5 3 2
           Million operating cycles  0.5 1




             0.3
             0.2
             0.1
               0.02  0.05  0.1  0.2  0.3  0.5  1  2  3  45 6  10
                                      Breaking current (A)
             2-pole CAL16... and CCL16...  auxiliary contact blocks





          Electrical Durability for DC-13 Utilization Category
          DC-13 utilization category according to IEC 60947-5-1 / EN 60947-5-1:
          •  making and breaking current = Ie with Ue value.


                                                               Example:
             100                                               Control of d.c. electro-magnet: Ue voltage = 72 V d.c. and
             70                                     1.10   cycles  breaking power = 70 W.
                                                       6
              50
                                                               On the opposite curve at intersection "O" 72 V / 70 W the
                                                       6
                                                    3.10   cycles  correspon-ding value for the electrical durability is approx-
           Breaking power (W)  10 5                 10.10   cycles
              20
                                                               imately 2 millions cycles.
                                                       6
              2
              1
                10     20 24     50  72  100    200  250  500
                                           Voltage (V)
             2-pole CAL16... and CCL16...  auxiliary contact blocks








                                                                                                                 1SBC101657S0201
   399   400   401   402   403   404   405   406   407   408   409