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Position Indication for Automatic Transfer Switch -
Standalone ATS and Isolation ATS
READY STATUS
INDICATOR
"READY"
Table T4-1: Position Indication Description for Standalone ATS & Isolation ATS
*Permissible operations are given for illustrative purposes only. Never attempt to manually close contacts with opposite source contacts closed
Position Indication for Automatic Transfer Switch - Bypass ATS
CHARGE STATUS LED
On
On
Table T4-2: Position Indication Description for Standalone ATS & Isolation ATS
*Permissible operations are given for illustrative purposes only. Never attempt to manually close contacts with opposite source contacts closed
OPERATIONS
Main spring charge
Table T4-3: Stored Energy Mechanism Sequences of Operation
Zenith Automatic Transfer Switch |
CONTACT POSITION
DESCRIPTION
INDICATOR
"CLOSED"
Contact set is closed, connecting load to source
"OPEN"
Opposite source contacts are closed or
mechanism spring is not charged
Contact set is open
"OPEN"
Mechanism is charged
Contact set is open
CONTACT POSITION
DESCRIPTION
INDICATOR
"CLOSED"
Mechanism closing spring is charged
Contact set is closed, connecting load to source
"OPEN"
Mechanism closing spring is discharged
Contact set is open
"CLOSED"
Mechanism closing spring is not charged
Contact set is closed, connecting load to source
"OPEN"
Mechanism closing spring is not charged
Contact set is open
NUMBER OF CRANKS REQUIRED
Approx. 13
new.abb.com/low-voltage
PERMISSIBLE OPERATION*
User may manually open the contact set by
pushing the Open Button
If opposite source contacts are open the user
may manually charge the mechanism spring by
inserting Charging Handle into Manual Charge
access point and rotating clockwise
User may manually close the contact set by
pushing the Source Close Button
PERMISSIBLE OPERATION*
User may manually open the contact set by
pushing the Bypass Open Button
User may manually close the contact set by
pushing the Bypass Source Close Button
User may manually charge the mechanism
closing spring by inserting Charging Handle
into Bypass Manual Charge access point and
rotating clockwise
User may manually open the contact set
User may manually charge the mechanism
closing spring by inserting Charging Handle
into Bypass Manual Charge access point and
rotating clockwise
17
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