Technical data

11/98
©1995 Square D—All Rights Reserved
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Control Units
SC150 Indication and Control Interface
Function
The SC150 indication and control interface is used to:
n Transmit to the DC150 data concentrator:
o Status information (on, off, tripped, tripped due to electrical fault, tripped due to ground fault)
for COMPACT CK and MASTERPACT circuit breakers or any other power circuit actuator
o The connected or disconnected status of withdrawable COMPACT CK and MASTERPACT circuit
breakers
o The status of any external contact
n Receive commands transmitted by a personal computer or programmable logic controller (PLC)
via the DC150 data concentrator (on, off and reset of the COMPACT CK and MASTERPACT
circuit breakers or any other power circuit actuator)
n Receive the information transmitted by the communications option on electronic control units
(STR43, STR53, STR55 and STR58) installed in COMPACT NS, COMPACT CK and
MASTERPACT circuit breakers:
o Trip-unit settings
o The RMS value of the current in the three phases and the neutral
o Current overloads
o The causes of tripping (overloads, short circuits or ground fault)
n Count the number of cycles carried out by the device
The SC150 interface is connected to:
n The DC150 data connector
n The auxiliary switches (OF, SD, SDE, SDV, CE, CD) on the circuit breaker with which the interface
is associated
n The motor operator for execution of the on, off and reset commands
n The communications outputs of the STR43, STR53, STR55 and STR58 control units installed in
COMPACT NS, COMPACT CK and MASTERPACT circuit breakers
A non-assigned digital input is available for other use. The SC150 interface is associated with a
single circuit breaker.
Important: The SC150 interface is used with COMPACT NS circuit breakers to:
n Remote to the user the information supplied by the communications option on STR43 and STR53
control units
n Actuate non-communicating motor operators
n Count the number of cycles carried out by the circuit breaker
Note: When associated with the SC150 interface, COMPACT NS circuit breakers are equipped with
standard auxiliary switches and motor operators. The SC150 indication and control interface is not
required with COMPACT NS circuit breakers equipped with communication-type auxiliary switches
or a communication-type motor operator.
Information or Function Managed by the SC150 Indication and Control Interface
Information Transmitted or Devices Associated with the SC150 Interface
Function Carried Out
Display Device Status: Circuit Breaker or Other Power-circuit Actuator
n On, Off + Standard OF Auxiliary Switches
n Tripped + Standard SD Auxiliary Switches (COMPACT Circuit Breakers)
n Tripped Due to Electrical Fault + Standard SDE Auxiliary Switches
n Tripped Due to Ground Fault + SDV Auxiliary Switches (COMPACT NS) or Output Contact of a Ground-fault Relay
n Connected or Disconnected Position + Standard CE and CD Auxiliary Switches
Remotely Control a Device (On, Off or Reset) COMPACT or MASTERPACT Circuit Breaker Equipped with Standard Motor Operator
Count the Number of Operating Cycles As Above
Display the Cause of Tripping and the COMPACT or MASTERPACT Circuit Breaker Equipped with STR43, STR53, STR55
Trip Unit Settings (Settings and Time Delays) or STR58 Electronic Trip Unit with Communications Option (COM)
Trip an Alarm for Long-time Fault As Above
Display the Value of the Current for Each Phase As Above
Display Internal Temperature of Switchboard PT100 Probe –4 to 212°F (–20 to 100°C)
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