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Instruction Leaflet
30-471 (E)
Page 9
Adjustments
Timer and frequency modules can be adjusted as per module front
plate. Voltage sensing modules can be adjusted as follows:
Undervoltage Module
Set Description
1 Set Dropout knob maximum Counter-clockwise
2 Set pick-up knob maximum Counter-clockwise
3 Increase line volts to desired Dropout value
(normally 70%) LED should be “ON”
4 Rotate Dropout Clockwise until LED goes “OFF”
5 Rotate Pick-up to maximum Clockwise LED is “OFF”
6 Increase line volts to desired Pick-up value
(normally 90%) LED is “OFF”
7 Rotate Pick-up knob Counter-clockwise until LED comes
“ON”
8 Re-check Pick-up and Drop-out by running voltage up and
down check by LED indication.
Overvoltage Module
Step Description
1 Set Dropout to maximum Counterclockwise
2 Set Pick-up to maximum Counterclockwise
3 Set line voltage to pull in value desired (normally
105%) LED is “OFF”
4 Rotate Pick-up Clockwise until LED comes “ON”
5 Rotate Dropout maximum Clockwise
6 Set line voltage to Dropout value desired
(normally 15%)
7 Rotate Dropout Counterclockwise until LED is
“OFF”
8 Drop line voltage to pull-in desired value. LED
should come “ON”
9 Increase line voltage to desired Dropout value.
LED should go “OFF”
DT and DTM Time Delay Relays Option #32A, 32B
Ratings - 6 Watts Power Consumption
Input coil Voltage - 120 volts
Contact Rating - 3 amperes at 220 volts Ac 50/60 Hertz
Operating Temperature Rating - -10
o
C to +50
o
C
Time Ratings - Various available
The relay is incorporated in the control scheme to stop the transfer
switch with both breakers open. This is to allow residual load voltage
to decay prior to closing on another supply which could be out of
phase. When the timing cycle is complete, the relay re-initiates transfer
to the available source.
Time Delay Engine Starting Relay
Solid State Type Option #2A
Ratings - 1.2 Watts Power Consumption
Input coil voltage - 120 volts at 50/60 Hertz.
Contact Rating - 10 amperes resistive at 120 volts
Time Range - 2 to 3 seconds - nonadjustable.
Operating Temperature Range - -10
o
C to +55
o
C.
Pneumatic Type Option #2B
Rating - 8 Watts Power Consumption
Input Coil Voltage - 120 volts 50/60 Hertz.
Contact Rating - 10 amperes resistive at 120 volts Ac.
Time Ranges - Various available.
Operating Temperature Range - -30
o
C to +75
o
C.