Automatic standby with (Closed Transition) return operation: Time delayed control sensor detects if a utility outage has occurred. When the timer expires, the generator set is automatically started and brought up to speed and voltage. Utility circuit breaker opens and generator circuit breaker closes (after adjustable time delay) so that the generator supplies power to the site load. When a healthy utility is connected for a set time delay, and the generator is synchronized with the utility, the generator circuit breaker shall open within 100ms, restoring normal power.

Automatic standby with (Open Transition) return operation: Time delayed control sensor detects if a utility outage has occurred. When the timer expires, the generator set is automatically started and brought up to speed and voltage. Utility circuit breaker opens and generator circuit breaker closes (after adjustable time delay) so that the generator supplies power to the site load. When a healthy utility is connected for a set time delay, the generator breaker opens and the utility breaker closes, restoring normal power.

15A-AT 2.4kV-15kV Metal-Clad Automatic Transfer Switchgear (ATS)

2.4kV, 4.16kV, 6.6kV, 7.2kV, 11kV, 12.47kV, 13.2kV, 13.8kV Metal-Clad ATS - Automatic Open or Closed Transition Transfer Switchgear

SAFE SMART SERVICEABLE SECURE SWITCHGEAR

This complete line of 5kV – 15kV indoor and outdoor metalclad switchgear is the ultimate in flexibility and safety. The 15A-Series is available in both full and compact sizes. It can also use several master, transfer, and paralleling switchgear controls.

Power Solution Information

The APT Automatic Transfer Switchgear (ATS) is a medium voltage product used to switch power from a normal source to an emergency source.

Closed Transition

Automatic standby with (Closed Transition) return operation:

Time delayed control sensor detects if a utility outage has occurred.
When the timer expires, the generator set is automatically started and brought up to speed and voltage.
Utility circuit breaker opens and generator circuit breaker closes (after adjustable time delay) so that the generator supplies power to the site load.
When a healthy utility is connected for a set time delay, and the generator is synchronized with the utility, the generator circuit breaker shall open within 100ms, restoring normal power.

Open Transition

Automatic standby with (Open Transition) return operation:

Time delayed control sensor detects if a utility outage has occurred.
When the timer expires, the generator set is automatically started and brought up to speed and voltage.
Utility circuit breaker opens and generator circuit breaker closes (after adjustable time delay) so that the generator supplies power to the site load.
When a healthy utility is connected for a set time delay, the generator breaker opens and the utility breaker closes, restoring normal power.

Soft Loading/Unloading

Automatic standby with (Soft loading/Unloading) operation:

Time delayed control sensor detects if a utility outage has occurred.
When the timer expires, the generator set is automatically started and brought up to speed and voltage.
At that time, the utility circuit breaker and the designated feeder breakers shall open, and generator circuit breakers shall close (after adjustable time delay). The synchronizing circuit breaker of the first available generator closes to a dead bus. At this time, the generator is supplying power to the site load.
When a healthy utility is connected for a set time delay, the soft close transition of the load to the utility shall begin.
The generator bus synchronizes with the utility source. Close the utility circuit breaker once they’re in sync. At this time, soft unloading of the generator set shall begin.
When the genset loads are gradually reduced to the level of the unload trip, setpoint the generator synchronizing breakers trip open. The gensets are then put in the cooldown mode of operation.

Import/Export Control

This mode seeks to maintain constant utility contribution to a site load. This is accomplished by monitoring utility contribution and trimming generator set load levels up and down as site loads change. Import control means the generator set is contributing less than the total site load requirements, and the utility supplies the difference. Export control means the generator set is contributing more than the total site load requirements, and the utility is absorbing the difference.

High Performance, Draw-out vacuum circuit breakers go into metalclad compartment
- Circuit breakers are removable
Mechanical interlocks prevent withdrawal or insertion of the circuit breaker when main contacts are not open
Closing springs automatically discharge before moving the circuit breaker out of the enclosure
Circuit breaker cell mechanism maintains trip during insertion or withdrawal
Breaker cannot be electrically or mechanically closed when in the intermediate position
Supports three position indication:
- Connected
- Transport
- Test/Disconnected
All live parts are enclosed in grounded metal compartments & Breaker frame remains grounded during levering and in the connected position
Grounded metal shutters automatically cover primary connections when circuit breaker is removed from the Connected position
High-speed operation: Complete fault clearing in less than 3 cycles
Hermetically sealed vacuum interrupters protect contacts from corroding elements and contamination
Easy maintenance with contact wear indicator is provided on the vacuum interrupter moving stem
Available Vacuum Circuit Breaker Ratings are shown on Page 10 of the 15A-Series Metal-Clad Switchgear Brochure