1. The purpose of use
   1.1 NCH8-□M series Manual Modular AC contactor (here inafter
   referred as contactor) is mainly used in power systems with
   AC 50Hz/60Hz, rated operating voltage up to 400V and
   rated operating current up to 63A. It is used as remote or
   manual switch for circuit control under AC-7b and AC-7a
   (non-inductive load or low-inductive load/resistance furnace,
   domestic appliance and low-inductive load of similar
   applications) application category. The contactor shall not
   be used for breaking short-circuit current, therefore it
   should be used with a proper short-circuit protection device.

          1.2 Standard: IEC/EN 61095、IEC/EN60947-4-1

          3. Regular Operating Conditions

          3.1 Ambient temperature：-25℃~+70℃
3.2 Humidity：Relative humidity＜50% at +40℃; up to 90% at
+20℃
3.3 Altitude：＜2000m
3.4 Pollution class：Class 2
3.5 Installation category：Class Ⅱ
3.6 Protection class：IP20
3.7 Installation conditions：Vertical installation; the inclination of
the installation surface to any direction should not exceed 5°;
TH35-7.5 steel mounting rails should be used for installation.
3.8 Operation conditions：Pickup voltage： (85%~110%) Us;release voltage：                       release voltage: (20%~75%) Us