DynaGen AST2225 Посібник з встановлення та експлуатації - Сторінка 5

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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.

1:2 Relay Board Module:

The relay board provides means for automatic transfer of a utility source of power to an

emergency source of power, upon loss of the utility, and switches back again, upon

restoration of the utility. The relay board has no built in delays for transfer. Any required

delays must come from an external source (ie. engine controller, timer module).

1:2:1 Sensing:

Voltage sensing is provided by means of an adjustable 3-phase monitor. The 3-phase

monitor continuously monitors 3-phase power lines for abnormal conditions. The

adjustable voltage monitor is a single set-point voltage monitor. Input voltages 10%

below the set-point range will cause the output contacts to de-energize (unit is adjustable

from (190-240 VAC). The adjustable drop out relay recommended for use with the

AST3225-3 Automatic Transfer Switch is the Symcom 201-A

ADJUSTMENT PROCEDURE

Plug in the adjustable voltage monitor. The monitor goes through its restart delay, and the

LED on the monitor flashes red and green. After 4 seconds, the green light comes on

solid. Measure the line to line voltage. Rotate the line voltage adjustment to the nominal

line voltage feeding the transfer switch. The adjustable voltage monitor is configured to

trip when the monitor sees a voltage drop to 90% of the set point voltage.

1:2:2 System Operation:

The relay board module has provisions for 12 and 24 VDC operation. The relay board

comes factory set for 12 VDC applications. Changing from 12 to 24 VDC will require

cutting the 2 jumper wires located next to the 5-position header.

2: INSTALLATION INFORMATION

2:1 General

The basic AST2225-3 transfer switch includes all control wiring connections. The

electrical switchgear should be installed by a certified electrician, and all wiring to/from

the unit should agree with all applicable electrical codes, standards, and practices.

Automatic

Manual for AST2225 Series

Transfer Switch