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03 April 2008

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CHINT Contactor

    HOUSEHOLD CONTACTOR
NCH8-20  household AC contactor is mainly applicable to a power system of AC 50Hz or
60Hz, rated working voltage up to 230V, and in a line of application class AC-7a with rated working voltage up to 230V and rated working current up to 20A.  It is used to remotely close and/or switch off the line.

The product is widely used in dwelling houses, hotels and so on.  Its main performance
indices is in conformity with that specified in code IEC1095.

DIMENSION DRAWING

• Rated insulation voltage, conventional heating current, application class and relevant
Rated working current and control power: (Refer to table 1)

• Action (operation) condition:
Apply rated control power-line voltage Us on the holding coil of the contactor at
environmental temperature from 5°C to +40°C. When the heat generated from coil keeps
in stable condition, the contactor shall be able to close reliably at any voltage within the range from 85%Us to 110%Us. The release voltage shall be no higher than 75%Us and no less than 20%Us.

• Mechanical lifetime: Not less than 1x105 times
• Electrical lifetime: Not less than 3x104 times


Table 1                                                      General Ratings
APPLICATION
CLASS CODE
RATED INSULATION
VOLTAGE V
RATED WORKING
VOLTGE V
CONVENTIONAL HEATING
CURRENT A
RATED WORKING
CURRENT A
CONTROL
POWER kW
 AC-1, AC-7a  500  230  20  20  4
 AC-7b  500  230  20  9  1.2



Table 2                                                      Close/switch off ability

 APPLICATION
 CLASS CODE
CLOSE/SWITCH OFF (ON/OFF) CONDITION

Ic/Ie          Ur/Ue            COSØ
 CHARGED
 TIME(s)
TIME
INTERVAL
(s)
OPERATION CYCLE
(times)
 AC-1, AC-7a  1.5  1.05  0.8  0.05  10  50
 AC-7b  8  1.05  0.45  0.05  10  50



Table 3                                                      Specified Operation Performance

APPLICATION
CLASS
CLOSE/SWITCH OFF (ON/OFF) CONDITION

Ic/Ie  Ur/Ue   COSØ
SWITCH-OFF CONDITION

Ic/Ie Ur/Ue COSØ
CHARGED
TIME(s)
TIME
INTERVAL
(s)
OPERATION CYCLE
(times)
 AC-1  1.0  1.05  0.8  1.0  1.05  0.8  0.05  10  6000
 AC-7a  1.0  1.05  0.8  1.0  1.05  0.8  0.05  10  30000
 AC-7b  6.0  1.0  0.45  1.0  0.17  0.45  0.05  10  30000