Specifications

I.B. ATS-I005
Page 6
Effective 6/00
button re-transfer to Normal from the Emergency
Source mode. If this option is not selected the factory
default selection is automatic.
Optional Feature 32A: Time Delay Neutral (TDN)
This feature provides a time delay in the transfer switch
Neutral position when both breakers are open. This
delay takes place when the load is transferred in either
direction to prevent excessive in-rush currents due to
out-of-phase switching of large motor loads. This feature
is not available with the Neutral Load Sense Delay
(TDNLD) feature.
Optional Feature 32B: Load Voltage Decay (LDCY)
This feature utilizes the load voltage measurements to
sense back EMF that is generated when the transfer
switch is in the Neutral position. It provides a delay in
transfer in either direction if an unacceptable level is
sensed as established by a customer programmed
level. The transfer will not take place until the back EMF
decays below the acceptable programmed level. This
feature has a separate setting of enabling or disabling
the operation. If disabled, the transfer switch will not
delay in the Neutral position and will transfer between
the sources as fast as possible. This feature is not avail-
able with the Time Delay Neutral (TDN) Feature 15.
Optional Feature 32C: In-Phase/Load Voltage Decay
In-phase transition is a feature that will allow a transfer
between two live sources only when the phase differ-
ence between the two sources is near zero. This is an
open transition transfer that prevents in-rush currents
from exceeding normal starting currents in the case
where motor loads are being transferred.
Load Voltage Decay utilizes the load voltage measure-
ments to sense back EMF that is generated when the
transfer switch is in the Neutral position. It provides a
delay in transfer in either direction if an unacceptable level
is sensed as established by a customer programmed
level. The transfer will not take place until the back EMF
decays below the acceptable programmed level. This fea-
ture has a separate setting of enabling or disabling the
operation. If disabled, the transfer switch will not delay in
the Neutral position and will transfer between the sources
as fast as possible. This feature is not available with the
Time Delay Neutral (TDN) Feature 15.
Optional Feature 32D: In-Phase/Time Delay Neutral
In-phase transition is a feature that will allow a transfer
between two live sources only when the phase differ-
ence between the two sources is near zero. This is an
open transition transfer that prevents in-rush currents
from exceeding normal starting currents in the case
where motor loads are being transferred.
Time Delay Neutral provides a time delay in the transfer
switch Neutral position when both breakers are open.
This delay takes place when the load is transferred in
either direction to prevent excessive in-rush currents
due to out-of-phase switching of large motor loads. This
feature is not available with the Neutral Load Sense
Delay (TDNLD) feature.
Optional Feature 35: Pre-Transfer Signal (TPRE)
Typically associated with elevator controls, this feature
provides for the control of an addressable relay to
remotely signal an elevator that a re-transfer is about to
take place. A permissive report-back signal from the ele-
vator, telling the IQ Transfer that the elevator has
reached the floor and opened its doors, is also recog-
nized to facilitate faster transfer operation. Should the
permissive signal not be used or does not occur, the IQ
Transfer has a programmed overriding pre-transfer
delay timer that can be set from 0 to 2 minutes.
Optional Feature 36: Load Shed From Emergency
This feature enables an external contact to initiate a
transfer when the load is connected to Source 2. If the
contact is opened when Source 1 is not available the IQ
Transfer will go to the neutral position with both sources
disconnected from the load. If the contact is opened
when Source 1 is available, the IQ Transfer will transfer
the load from Source 2 to Source 1.
Optional Feature 37: Service Equipment
This factory programmed feature makes the transfer
switch suitable for a service equipment rating by
responding to a Go-To-Neutral input.
Optional Feature 45: Load Sequencing Capability
(TSEQ)
This feature provides the sequential closure of up to 10
remote relays after a transfer. A customer programmed
time delay is available to delay closure between each of
the relays.
Optional Feature 46: Potential Transformer (PT)
Ratio
This feature allows external voltage transformers to be
used on the IQ Transfer’s source and load sense inputs.
Once this option is enabled, the PT Ratio setpoint can
be adjusted in steps of 1, between 2:1 and 500:1. Also
when this option is enabled the Nominal System Voltage
setting will be fixed at 120 or 110 volts, depending upon
the Nominal System Frequency setting. If the Nominal
System Frequency setting is 60Hz then the Nominal
System Voltage will be fixed at 120 volts and all voltage
pick-up and drop-out setpoints will be based upon the
120 volt level. The same is true of a Nominal System