Newest Type of Time Control Switch NKG2
1. Function and Scope
NKG2 time switch (hereinafter referred to as "time switch") is
applicable for regularly controlling switch-on and off of street
lamps, advertising light boxes and other equipments in automatic
control circuit with AC frequency of 50Hz, rated control power
voltage of 220V at most and rated working current of 0.75A at most.
2. Model and Its Meaning
3. Normal Operating Condition and Installation Condition
3.1 Ambient air humidity: -25° C~+40° C, and the average
temperature is no more than +35° C in 24h.
3.2 Altitude: No more than 2, 000m.
3.3 Humidity: The relative air humidity of the installation site
shall be no more than 50% when the maximum temperature is +40° C,
while it can be higher under lower temperature. Special measures
shall be taken for the condensation occasionally formed due to
3.4 Pollution level: 3.
3.5 In the medium with no explosion hazard and no gas that is
enough to corrode metal and destroy the insulation and the place
shall not have severe conductive dust.
3.6 In the place where is provided with anti-snow and anti-rain
equipment but not be full of water steam.
3.7 In the place without significant shake, shock and vibration.
3.8 Installation class: II.
3.9 Transport and Storage Conditions: -25° C to +55° C.
3.10 Power voltage change scope: 85%~110% rated voltage.
3.11 Protection grade: IP20.
4 Main Technical Parameters
4.1 Rated control power voltage: AC (50Hz): 220V.
4.2 Conventional thermal current: 3A.
4.3 Category of the auxiliary circuit: AC-15.
4.4 Rated working current (Ie): AC-15 220V 0.75A.
4.5 Timing error: ≤ 2s/d.
4.6 Time control scope: 1min~168h.
4.7 Mechanical life: ≥ 30, 000 times.
4.8 Electric endurance: ≥ 10, 000 times.
4.9 Installation method: Device installed, guide tracked.
4.10 Anti-interference tolerance sees Table 1.
5 Outline, Installation Dimension and Wiring Method
5.1 Outside dimension and installation dimension see Figure 1.
5.2 Wiring method
5.2. 1 Direct control method
Power of the controlled appliance is supplied in single-phase, of
which the working current is no more than the rated value of this
switch. Direct control method may be adopted, wiring method see
Figure 2; For light load with great starting current impact, please
adopt AC contactor expansion control method.
5.2. 2 Single-phase expansion method
The controlled appliance is power supplied in single-phase, of
which the working current exceeds the rated value of this switch.
Please adopt AC contactor expansion control method, see Figure 3.
5.2. 3 Three-phase operating method
Power of the controlled appliance is supplied in three-phase, so
external AC contactor is required hereof.
A) The coil voltage of the controlled contactor is AC 220C 50Hz, so
its wiring method sees Figure 4;
B) The coil voltage of the controlled contactor is AC 380V 50Hz, so
its wiring method sees Figure 5.
Time Switch Controller (NKG-2) Images