Daktronics AB-1600-1.5,2.5 - Manual (Page 19)

Electrical Installation
3-3
3.3 Power Connection
Reference Drawings: Power Term Panel Layout ........................... Drawing A-103140
Power Specifications ................................... Drawing A-103186
The power termination panel is located in the left end of the display (front view). Follow the
instructions in Section 4.1.1 to remove the far left module to access the termination panel.
Drawing A-103140 shows a typical power termination panels for either the master or the slave
faces. For a 2V display, power needs to be brought into both faces. The termination panels are
located in the left end (front view) of each display face. Connect power as stated below.
The conduit for power should enter the display face near the termination panel. Knockouts are
provided in the back sheets for power cable conduit attachment. Refer to the reference drawing
schematic for your model in Section 3.6 and to Drawing A-103186 for power requirements
(note: power stated is per display face). The maximum power requirements are also given on
the Daktronics serial tag. The power is connected to TB41, located at the bottom of the
termination panel. Connect as follows:
1. Route power through conduit into the display and over to the termination panel.
2. Connect the white neutral wire(s) to the position labeled NEUT on TB41.
3. Connect the hot wires to the positions labeled L1 and L2 of TB41 for 120/240 single
phase power and to L1, L2 and L3 of TB41 for 120/208 three phase power.
4. Connect the ground wire to E41 (Earth Ground). Refer to Section 3.1 for special
grounding instructions.
The customer is to supply a fused main disconnect(s) for power distribution to the termination
panel. This customer supplied fused main disconnect is considered the service entrance point.
The main disconnect should be mounted at or near the point of power supply connection to the
display. A main disconnect should be provided for each supply circuit to the display. The
means of disconnecting must be located in a direct line of sight from the display or outline
lighting that it controls. This requirement provides protection by enabling a worker to keep the
disconnecting means within view while working on the display.
★
Exception: Means of disconnection which are capable of being locked in the open position
may be located other than in direct line of sight.
Due to the inrush current required by the transformers on start-up, the main disconnect may
have to be over sized (or use high-magnetic trip [HID] breakers) to handle this momentary
inrush current requirement.
When terminating the incoming power to the term panel, the individual power phases are to be
balanced as evenly as possible. Current draw per line, as noted on the sales literature or
schematic, is shown as the high leg current draw.