Vogt VT40 Service Manual

9-2 Vogt
®
VT Service Manual
Additional Product Information
Parameters adjustment (in order of display)
Active display of Line Voltage (this is the default normal display)
Active display of Load Side Voltage (if connected)
Voltage Set Point
(VAC Flashes) The value may be adjusted by pressing the up and down arrows. This may be set to the
normal operating voltage of the device being protected in one volt increments.
Under/over Voltage Tolerance in %
(UNDERVOLTAGE/OVERVOLTAGE flashes)
The value may be adjusted by pressing the up and down arrows.
Imbalance Voltage Tolerance in %
(% IMBALANCE flashes) The value may be adjusted by pressing the up and down arrows.
Lockout Time in seconds
(SECONDS flashes) The value may be adjusted by pressing the up and down arrows. (This is the delay on
break timer value)
Delay time in seconds and tenths of seconds
(RESP. SECONDS flashes) The value may be adjusted by pressing the up and down arrows. This is the time
that a fault is allowed before shutdown occurs.
Control mode
(ON OFF AUTO flashes) The value may be adjusted to OFF (load will not turn on), ON (load will turn on
whenever there are not faults and timers are finished) and AUTO (Load will turn on when there is a control
input).
Contactor fault monitor mode
(CONTACTOR FAULT flashes) This option allows you to monitor the contactor and lock it out if the line
voltage and load side varies by more than 5 volts. Pressing the up and down arrows selects off (default) or on.
The load side of the contactor must be connected to the load terminals of the DTP-3 to use this option.
Display of fault memories
(MEM flashes) Pressing up or down displays the last fault conditions that took the unit off line. The first 25
faults are recorded. The top number displayed represents the fault memory. The middle number
represents the total number of faults that have occurred since the fault memory was cleared.
To clear the memory, press and hold the up and down keys until the display is cleared.
Notes
If you press SELECT and do not change a parameter by pressing the up or down arrow keys, the
DTP-3 automatically returns to displaying the line voltage in a few seconds.
The new settings are saved in permanent memory when the display returns to displaying the line
voltage. The new settings may be verified by pressing the select button to sequence through the
various parameters.
To prevent tripping on a 1 volt change, the DTP-3 automatically calculates cut-in voltages for the
return from undervoltage conditions. The cut-out voltage is always based on user voltage and
tolerance settings, while the cut-in voltage is 3% closer to the nominal voltage setting. This quality
is sometimes referred to as hysterisis. This is to help reduce oscillation that may occur on weak
power distribution system. When the load is switched off due to undervoltage, the line voltage will
increase. Without the hystersis, the monitor would switch the load back on, the line voltage would
again drop, and cause a continuous on-off-on cycling.

Vogt VT40 Specifications

General

Brand	Vogt
Model	VT40
Category	Ice Maker
Language	English