Twilight Switch with lamp fault alarm Model: T 42 isan outdoor unit, basically designed for automatic operation of Aviation lamps on the communication towers at the unmanned stations such as BTS / backbone sites. This unit comprises Twilight switch with built-in lamp fault monitoring circuit. It consists of two independent channels for connecting aviation lamps at two different stages on the towers i.e. 30 & 70 Meter it is suitable for the towers up to 70 Meters height. Only one or two lamps of specified type can be connected at the lower & top stages with the help of shortlinks SL1 & SL2 channel 1& 2 can be either enabled or disabled as per the requirement.
a] Twilight switch : T 42
b] Light sensor : In-built
c] No. of Channels : Two (Both Channels can be enabled or disabled by the shorting links SL1 & SL2 provided on the main PCB)
a] Power on : Green indicator
b] Channel 1 lamp fail : Red indicator
c] Channel 2 lamp fail : Red indicator
Remote alarms are separately provided through potential free relay contacts. Alarm relays remain normally open / normally close as per your requirement and offers short contact during alarm condition.
a] Operating supply : 230 V AC +/- 10 %, Single Phase, at 50 Hz
b] Power consumption : Min 1.5 W to Max 20.0 W (Depends on lamp wattage)
c] Contact Rating : 5 Amp per channel
a] Panel size : H X W X D 225 X 190 X 90 MM
b] Panel weight : 2 Kg.
c] Panel color : Off white
d] Panel mounting : Outdoor Vertical wall mounting
a] Channel 1 : LED Array Lamp
b] Channel 2 : LED Array Lamp
c] Activation Delay : 15 to 30 Seconds for Day & Night