American Power Conversion VS 100, VS 50 user manual AC Power Connections, AC Connections

2.3.AC Power Connections

WARNING: Ensure that all of the external dc and ac circuit breakers are in the OFF position prior to connecting service to the power plant. Confirm that all voltages have been removed

including any battery sources before proceeding.

AC Connections

The Magnum VS DC power system, specifically each rectifier, requires a single phase input AC supply (Range: 85–264 VAC, 47–63 Hz) to operate. Each Magnum VS shelf has three (3) sets of input terminals (TRM 2, 5, 8; TRM 3, 6, 9; and TRM 4, 7, 10). As a result, each Magnum VS shelf can be wired such that three (3) different AC sources (e.g., three phase, delta or star, connections) provide power to the rectifiers (see Figure 3.3-2), or, a single AC source is used to provide power to the rectifiers, and jumper cables are used to interconnect the different input terminals (as appropriate, and provided the input wiring is not overloaded; see Figure 3.3-1).

The Magnum VS 50 SKUs are shipped configured (including the appropriate jumper cables) for operation from a single AC source.

The Magnum VS 100 SKUs are shipped configured (including the appropriate jumper cables) for operation from two AC sources (one for each shelf).

Figure 2.3-1 Magnum VS 50 Backplane

If a single AC source is used it is typically connected to TRM 10 (Line), 7 (Neutral) and 4 (Ground).

Rectifier	Terminal #	Function	Terminal #	Function	Terminal #	Function
Rectifier 1	TRM2	Ground	TRM5	Line or Neutral	TRM8	Line
Rectifier 2 & 3	TRM3	Ground	TRM6	Line or Neutral	TRM9	Line
Rectifier 4 & 5	TRM4	Ground	TRM7	Line or Neutral	TRM10	Line
Chassis	TRM1	Ground

Figure 2.3-2 AC Input Wiring

Magnum VS –48 Vdc User Manual Page 10