ASCO Power Technologies Products Digital Binder

ASCO 7000 SERIES Bypass-Isolation Transfer Switches

Transfer / Bypass Status Panel

Bypass switch position Transfer switch position

Source availability

Isolation handle position

Instantly see the status of power availablility and switch positions.

Bypass and Isolation - Simple as 1, 2, 3

1 Bypass

Power Knowledge Application and Design Factors for Automatic Transfer and Bypass-Isolation Switches Part 1

Push in the transfer switch bypass handle and turn it counter clockwise

Bypass Switch

Normal Source

To Load

Emergency Source

GenSet

1

L

Bypass Switch

Load

N

E

Isolation Contacts

L

Utility

Automatic Transfer Switch

Transfer Switch

N

E

2 Set in Test Position

Normal Source

To Load

Emergency Source

Bypass Switch

GenSet

Part 2

L

Bypass Switch

3D Bypass Switch Animation

N

E

Load

Turn isolation handle counter clockwise until window shows “Test”

Transfer switch operating circuits remain connected to the controls through secondary disconnects

Isolation Contacts

Utility

L

Automatic Transfer Switch

Transfer Switch

N

E

3 Isolation Position

4

Bypass Switch

Normal Source

To Load

Emergency Source

GenSet

2

L

Bypass Switch

Load

N

E

3

Turn isolation handle counter clockwise until window shows “isolate”

Transfer switch operating circuits are disconnected from the controls

Isolation Contacts

Utility

L

Automatic Transfer Switch

Transfer Switch

N

E

ASCO Power Technologies 160 Park Avenue, Florham Park, NJ 07932

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