Rockwell Automation Allen-Bradley 1502 - Contactor Operation

Contactor Product Description 1-3
1502-UM051E-EN-P – June 2013
Contactor Operation e standard electrically held contactor consists of three vacuum bottles oper-
ated by an electromagnet assembly through a mechanical linkage (See Figure
1.3).
Electro-Mechanical Control (Series D)
 r 8IFOUIFDPOUSPMDJSDVJUJTFOFSHJ[FEDVSSFOUĔPXTUISPVHICPUIBDMPTJOHDPJM
and hold-in coil, creating an electromagnet.
 r ăJTFMFDUSPNBHOFUQVMMTUIFBSNBUVSFQMBUFUPXBSETUIFDPJMDPSFTXIJDIBMTP
rotates the actuator sha.
 r ăFBDUVBUPSQMBUFJOUVSOQVTIFTUIFJOTVMBUPSBOENPWBCMFTIBĕVQDMPTJOH
the contacts inside the vacuum bottle.
 r ăFDPOUSPMDJSDVJUFDPOPNJ[JOHBVYJMJBSZDPOUBDUTMPDBUFEPOUIFMFĕTJEFPG
the contactor, change state once the contactor closes.
 r ăFDVSSFOUUIBUJTFOFSHJ[JOHUIFDMPTJOHDPJMJTUIFOTXJUDIFEPĈăFDPOUBD-
tor remains closed by the hold-in coil only.
 r ăFDPOUBDUPSJTPQFOFECZEFFOFSHJ[JOHUIFIPMEJODPJM
e mechanical latch version of the contactor operates basically the same way
with the following exceptions:
 r #PUIDPJMTBSFEFFOFSHJ[FEVQPODMPTJOHPGUIFDPOUBDUPSBOEUIFBSNBUVSFJT
held in the closed position by a spring-loaded latching mechanism.
 r ăFDPOUBDUPSJTPQFOFECZFOFSHJ[JOHBUSJQDPJMXIJDIQVMMTUIFMBUDIBXBZ
from the armature, or by engaging a manual trip mechanism via a pushbutton
located on the front of the medium voltage door (see Figure 1.4).
Note: External control relays and a rectication circuit are used to control the
standard DC closing and hold-in coils on the contactor.