Product Manual

TP-6946 3/1630 Section 3 Three-Source Systems
6883
12
6
1
7
ATS1
ATS2
Connect Output 1 terminals
TB1-5 and TB1-6 on ATS 1 to
Input 1 terminals TB1-1 and
TB1-2onATS2.
Assign ATS 1 main logic board
output 1 to 3 Source System
Disable.
Assign ATS2 main logic board
input 1 to 3 Source System
Disable.
Connect one normally closed
output from ATS2 to G1 engine
start (ES) connections. Assign to
Engine Start Source N.
12
6
1
7
ATS2 TB1
on logic board
ATS1 TB1
on logic board
G1 ES
3 Source System Disable
Connect the ATS2 engine start contacts (on
the contactor or the field-connection terminal
block) to G2 engine start (ES) connections.
SeeFigure3-1.
Figure 3-2 Input and Output Connections for Three-Source Systems
3.6 ATS1 and ATS2 System Setup
Set the following paramemeters on the transfer
switches:
ATS1: Use the System Setup Menu to set the Source
type to Util-Gen.
ATS2: Use the System Setup Menu to set the source
type to Util-Gen-Gen. Set the 3 Src Engine Start Mode
to Mode 1 or Mode 2 as described in Section 3.2. In the
Set S1 Time Delay menu, verify that Fail to Acquire
Preferred is enabled.
The transfer switch settings are summarized in
Figure 3-3.
Transfer
Switch
Source Type
3 Src Engine
Start Mode
Preferred
Source Toggle
Inputs Outputs
Fail to Acquire
Preferred
ATS1 Util-Gen Not Required Not Required Not Required
Three Source
System Disable
—
ATS2 Util-Gen-Gen Mode 1 or Mode 2
(See Section 3.2)
Enable or Disable
See Section 3.3
Three Source
System Disable
Source N Start
Signal
Enable
Figure 3-3 Transfer Switch Settings for Three-Source Systems