Xantrex Technology ACCB-L-L1 manual Operating the AC Bypass Switch

Operation

The AC Bypass Switch

During normal operation (Figure 3-2 on page 3–3), AC power passes from the single external AC source (generator or grid) through the inverter to the AC loads. The inverter monitors the incoming power and uses this power to keep the batteries charged.

When this external source of AC power is not available, the inverter switches to external DC power (e.g., batteries, generator, solar, wind, hydro) and continues to power the load.

When performing inverter maintenance, the breakers can be switched to the Bypass Operation (Figure 3-3 on page 3–3) which allows the AC loads to be powered directly from the external AC source without affecting connected AC loads.

To de-energize both circuits, switch the breaker pair to the OFF position (Figure 3-4 on page 3–4).

Operating the AC Bypass Switch

Once the AC voltage has been applied, the bypass switch is ready for operation. Under normal operation the Inverter Output breaker is ON.

There are three possible modes of operation for the bypass switch:

•“Normal Operation”

•“Bypass Operation”

•“AC Input/Output Off”

ON	ON
	60
60
OFF	OFF

INVERTER	INVERTER
Bypass 1	DISCONNECT 1
on to bypass	on for normal operation

BOTH OFF TO DISCONNECT AC OUTPUT

NORMAL OPERATION:

Left Breaker = OFF

Right Breaker = ON

Inverter AC power available to Inverter AC Distribution Panel

ON	ON
60
	60
OFF	OFF

INVERTER	INVERTER
Bypass 1	DISCONNECT 1
on to bypass	on for normal operation

BOTH OFF TO DISCONNECT AC OUTPUT

BYPASS OPERATION:

Left Breaker = ON

Right Breaker = OFF

Utility or Generator AC power available to Inverter AC Distribution Panel

ON	ON
60	60
OFF	OFF

INVERTER	INVERTER
Bypass 1	DISCONNECT 1
on to bypass	on for normal operation

BOTH OFF TO DISCONNECT AC OUTPUT

AC OFF OPERATION:

Left Breaker = OFF

Right Breaker = OFF

Utility/Generator/Inverter AC power disconnected to Inverter AC Distribution Panel

Figure 3-1AC Bypass Switch Mode Summary

3–2 973-0031-01-01 Rev A