User guide

TS 870 TRANSFER SWITCH
PM062 REV 5 08/05/05 14 Thomson Technology
200A, over current protection is non-adjustable thermal-magnetic type trip units. For transfer
switches rated 400A through 1200A over current protection is adjustable electronic type with
long time & instantaneous trip unit elements with optional ground fault protection elements.
Note: Ground fault protection is supplied as standard on 1000A and 1200A transfer switches
that are used on systems greater than 240V.
An upstream over current protection device is required on the generator source which feeds
the TS 870 Transfer Switch if integral over current protection option is not specified on the
ATS.
Note: For models of transfer switch with adjustable integral over current protection trip units,
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 instantaneous/short-time current and time delay settings.
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.
Refer to Section 4.1 Product Model Code for types of integral over current protection which
are supplied with the transfer switch.