DynaGen AST3225 Instrukcja instalacji i obsługi - Strona 4

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1: GENERAL DESCRIPTION

1:1 Switchgear:

The AST3225 transfer switch mechanism consists of a basic mechanical switching

assembly that can be configured to satisfy various application requirements. (UL listed

E200939 Switch Mechanism). This manual describes the AST3225-2 model. (General

Arrangement page 14)

1:1:1 Specifications for AST3225-2 model

Transfer Motor: 120V 60 HZ 2.3 amps thermally protected

Withstand/interrupting rating: symmetrical 10 KA. for loading at 100% of nameplate

current Enclosure: 24" wide x 30" high x 9" deep. NEMA 4.

1:1:2 Operation:

The AST3225 includes the suitable sensing circuitry for automatic transfer of an

electrical load to a stand-by power supply in the event of a drop or loss of voltage of any

or all phases of the normal power supply. Upon the restoration of the normal supply, the

electrical load is automatically re-transferred to the normal power supply.

The transfer motor utilizes power from the source to which the electrical load is being

transferred. The mechanism provides a positive mechanical interlock to prevent both

switches from being closed at the same time. The AST3225 also incorporates the basic

actuating motor control switches, terminal blocks, and voltage sensing connection points

for Utility Line sensing. Provision is also made for manual transfer of the power sources

if necessary. Instructions for the manual procedure are located on the operating arm of

the mechanism. The AST3225 mechanism is a lever-operated device controlled by a 120

volt unidirectional gear-motor.

The transfer motor drives a crank that in turn operates an aluminum lever arm, by sliding

a nylon slider between the top and bottom parts of the arm assembly. The lever, in turn,

operates the two switch handles by means of a unique spring and roller arrangement. The

travel position of the aluminum lever is detected by two micro switches, which in turn

disconnect power to the transfer motor, when appropriate.

Automatic

Manual for AST3225

Normal/Emergency/Neutral Lug Connections 300

MCM MA Load connections 320 MCM (Max Wire

Size)

VOLTAGE

NORMAL

208/240

Amperage

225

Single

Poles

Transfer Switch

EMERGENCY

208/240

225

Single