Operator's Manual

ASCO 336 / 337 Operator’s Manual
Page 2 ASCO Power Technologies 381333-427 A
300 Series PCS Family of Products
The ASCO 300 Series Power Control System (PCS) is a
family of affordable and feature-rich products for paralleling
generators, controlling loads, and connecting generators to the
utility power system or grid. Transfer switch based or circuit
breaker based power switching options are available to meet
the requirements of all applications. The PCS 300 Series
control system is an integrated platform that provides
sequencing, synchronizing, generator load sharing, protective
functions, power management, and many other industry-
leading features, all while minimizing costs.
336 / 337 PCS
The ASCO 336 / 337 PCS utilize the ASCO Power
Technologies industry-leading and time-proven Closed
Transition Transfer Switch (CTTS) mechanism to parallel two
generators per CTTS unit. The 336 manages the first two
generators of any system. The 337 can be added to manage
the third and fourth generators of a four generator system.
Due to the fault currents available, usually four generators is
the limit of a 336/337 PCS system. There are alternatives
within the 300 Series for paralleling more generators: contact
ASCO Power Technologies for more information.
A 337 may be added later as long as the electrical power
infrastructure is compatible. Options must be the same in a
336 and 337 for proper operation.
CTTS
Transfer
Switch
CTs
CTs
Controller
Operator
Interface
Terminal
OIT
Typical 336 Series PCS H-design 800-1200 ampere
Lower
Customer
Terminal
Block
Upper
Customer
Terminal
Block