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4 setting the parameters (continued) – Alpha Technologies 1000 Series User Manual

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19

3

Operation

Alpha Technologies

3.4

Setting the Parameters (Continued)

Notes:

1) HE Mode Set: This is used to set if the unit sends the line power through double conversion
and then to the loads (HE Mode:OFF) or straight through to the loads (HE Mode:ON).

2) Set Generator Mode: This widens the input parameters so the unit can be used with a
generator.

3) Site Wiring Alarm: This tells you if the line’s ground and neutral wiring is reversed.

4) Free Run Mode, Bypass Enable/Disable at Free Run Mode: These two parameters work
together to control the unit’s input voltage or frequency windows.

The available combinations are:

Combination

Result

Free Run: ON

Bypass: DISABLED

(Factory Default)

Input window is:

45-65 Hz (Automatic frequency sensing)

96-138 VAC (60 Hz)

184-265 VAC (50 Hz)

Free Run: ON

Bypass: ENABLED

Input voltage window is:

±10%, +10%/-15% or +15/-20% VAC

(operator set)

Free Run: OFF

(Bypass is automatically

turned off)

Input frequency window is:

±2%, ±5% or ±7% Hz

(operator set)

Figure 3.2

Free Run/Bypass Combination Table

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