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TS 870 Transfer Switch
3.11. TRANSFER SWITCHES WITH INTEGRAL OVER CURRENT PROTECTION
For models of transfer switch with integral over current protection, the over current protection
must be set prior to operation. The equipment will be shipped from the factory with a long-time
current setting of 100% (of the equipment rating) and maximum short-time/instantaneous
current and time delay settings.
Refer to SECTION 5.2.2 of this manual for additional information on operation of the Transfer
switch following an over current trip condition. Refer to information supplied with the transfer
switch documentation package for adjustment procedures on the power switching units over
current protection trip unit. Contact the factory if any additional information is required.
3.12. TRANSFER SWITCHES WITH MULTI-TAP VOLTAGE CAPABILITY
If the transfer switch has programmable multi-tap voltage capability (i.e. ATS Model Code with
Voltage Code "Y"), confirm the transfer switch has been configured for the correct system
voltage prior to installation.
The voltage selections and connections are shown on the drawings supplied with each transfer
switch. The factory default settings will be indicated on the calibration label attached on the
inside of the enclosure door (supplied loose on open style models). A blank label is included
to record the applicable settings if the configuration is changed from the factory default settings.
To change the transfer switch voltage, refer to TS 870 System Voltage Change Procedure
Appendix B. Contact Thomson Power Systems for further information as may be required.
PM062 REV 11 16/04/19
WARNING
Do Not Energize this equipment until
device settings have been verified to
ensure proper system protection &
coordination. Failure to do so may
result in equipment failure.
WARNING
Failure to confirm and match transfer
switch voltage with the system voltage
could cause serious equipment damage.
8
Thomson Power Systems
,
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