User guide

2–6 HA32A UPS OPERATION

2.3 CONTROLS

There are two types of controls for the HA32A UPS: electromechanical and

programmable.

2.3.1 Electromechanical Controls

The circuit designator for the ﬁve electromechanical controls of the HA32A UPS, and the

function of each, are listed below. See Figure 2–4 for the location of these controls.

Circuit

Designator

Function

Q1 Main ac input (MAINS1) circuit breaker. Applies input voltage to the

rectiﬁer/battery charger and provides input current protection.

Q3BP Manual bypass nonautomatic switch. Allows the bypass ac input to bypass the

UPS and is used in conjunction with Q4S and Q5N.

Q4S Bypass ac input (MAINS2) ON/OFF switch. Applies power to or isolates the

static switch. Used in conjunction with Q3BP and Q5N.

Q5N UPS output isolation switch. Isolates the UPS output and is used in conjunction

with Q4S and Q3BP.

K3N Inverter output contactor. Mechanically isolates the UPS inverter from the static

switch. When the static switch is ON, K3N is open. When the static switch

is OFF, K3N is closed. This contactor makes a loud mechanical sound when it

changes position.

2.3.2 Programmable Controls

The programmable controls are covered in detail in Section 2.4 and include such control

functions as:

• Rectiﬁer/battery charger start and stop

• Inverter start and stop

• Clearing faults

• Synchronized/nonsynchronized UPS inverter operation

• Output ac voltage adjustment

• DC voltage and battery charger current limit adjustments

• Boost or equalization charge on battery

• Selecting display language

• Diagnostic and test routines

• Adjusting display contrast