DynaGen AST3225 Instrukcja instalacji i obsługi - Strona 5

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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:

The relay board module provides 2 types of voltage sensing:

i). Relay Coil Sensing:

When the slide switch, located on the relay module, adjacent to the 8 pin octal socket, is

in the ON or UP position, utility voltage sensing is provided by means of an on board

relay coil. The relay coil characteristics set the pick up and drop out of the main utility

source.

ii). Adjustable Voltage Sensing:

When the slide switch is in the OFF, or DOWN position, the on board relay coil is

bypassed, and voltage sensing is provide by a UL approved voltage sensing module,

which plugs into the 8 pin octal socket. 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 Automatic Transfer Switch is the Symcom

201-200-SP-T Rev 5.20.

ADJUSTMENT PROCEDURE

Rotate the line voltage adjustment to the nominal line voltage feeding the transfer switch.

Measure the line to line voltage. If the voltage is up to 10% below the adjustable voltage

set point, and the LED on the monitor is illuminated, the adjustable voltage monitor is

working properly. The voltage sensor can also be factory set to customer specifications.

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.

Automatic

Manual for AST3225

Transfer Switch