The SS20 Part Night Photocell incorporates a dimming module to vary the output of an electronic ballast and hence the light output of the lantern assembly during the hours of lower traffic flow - this period is selectable (factory set) for any single, continuous period providing maximum flexibility and energy saving whilst still providing light during the hours of darkness. The unit is available set to GMT part-night switching or with automatic GMT/BST (DLS) switching.

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Dimensions and SpecificationDimensions and Specification

Electronic EM Relay Load Switching YES
Supply Voltage 50/60Hz AC 198-264, 50Hz only
Switching Differential 1:0.5 NEG
Maximum total load for discharge lighting (eg. HPS, MH) (watts) 500
Maximum total load for incandescent lighting (watts) / Maximum VA 1200
Switching Delay In Seconds 10
Power Consumption (watts)
Sensor Type Photo IC
Sensor Drift Negligible
Fixing hole diameter 20mm
Max Operating Ambient Temp Range (ºC) -20/+75
IP Rating Installed IP65
VDR Voltage Supression YES
Additional Features Part Night Dimming with ZEBC Electronic Ballast

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