Electrical - LG LAEC015-GN Owner's Manual

Electrical

The power distribution system used must provide adequate protection against excess line current and
leakage currents to earth.
Electrical Characteristics for ONE LAEC015-GN
At 100V AC Input
Parameter Unit
Input current A
Input freq. Hz
Power W
Circuit Protection
Each section of the screen should be protected by a Circuit Breaker to protect against high fault currents,
and a Residual Current Device (RCD) to detect earth leakage currents.
Earth Leakage Considerations
Each panel of the system has earth leakage current contributions from nineteen switched-mode power supplies
and two EMI filters. The total earth leakage current per panel can be up to 14.1mA at 240V. If a 30mA RCD
is used, then the maximum number of panels per section should be safely limited to 2.
Inrush-current and Over-current Considerations
The inrush current of the switched mode power supplies used to provide LED and logic power to each panel
is specified by the manufacturer as 1160A at 230volts when cold start. However, maximum current in the
steady-state for a panel is considerably less: 8.4A at 240 volts and 20A at 100 volts. The circuit breaker used to
control a section of the screen must be able to handle the short-term inrush current at switch-on, without
causing unnecessary disconnection of the supply, and be able to detect excess currents due to faults within the
equipment, during normal operation.
Earthing
Each panel is separately connected to the AC power distribution system's earth through the appliance coupler.
All exposed panel metalwork (main frame) is also connected to this earth.
If the framework is earthed only through each panel (i.e. through the panel's mounting bolts), there is a
possibility of electrical damage if a wiring fault occurs, or if an electrical discharge, such as lightning strike,
hits the panels. Under these circumstances, the current discharge path will be through the panel to earth
rather than through the framework to earth. When permanently installed on a metal framework, the framework
itself should be directly connected to earth also.
Rating
Normal Max
8 20
50 – 60
65
800 2000
At 240V AC Input
Parameter Unit
Input current
Input freq. Hz
Power W
Rating
Normal
A 3.33
50 – 60
800
39
Max
8.33
65
2000