217
March 1996
F
Power Circuit Breakers Type DSII and
Typical Specifications
Table 1
Digitrip
Optimizer
Breaker
Interface
Module
IMPACC
Network
Initial System Setup
Select Breaker Addresses
X
Select System Frequency (50/60) Hz
X
X
X
Set System Baud Rate
X
X
X
Set System Password
X
X
X
Configure the System
Change Address
X
X
X
Change Time-Current Setpoints
X
X
X
Select Protection Options
X
X
X
Select Alarm Levels
X
X
X
Display Information
Breaker Information
X
X
X
Time-Current Setpoints
X
X
X
Metered Values
X
X
X
Trip Event Information
X
X
X
Test Trip Unit Performance
Phase and Ground
X
X
X
Trip/No Trip
X
X
X
Expanded Energy Monitoring
Set Addresses for Group Energy Monitoring
X
X
Group Energy Readings
X
X
Local and Remote Indications
Remote Indication/Alarming
X
X
Breaker Status LED Indication
X
Expanded Communications
Communicates with:
OPTIM Trip Units:
X
X
X
Digitrip 810 & 910 Trip Units
X
X
IQ Energy Sentinel
X
X
Up to 50 Devices
X
X
Up to 1000 Devices
X
Expanded Capabilities
Wave Form Analysis
X
Custom Billing Software
X
Trip Curve Software
X
Type DSII or SPB Circuit Breakers with Dig-
itrip OPTIM 750 and 1050 Electronic Trip
Units.
Cutler-Hammer/Westinghouse power break-
ers with microprocessor-based RMS sensing
trip units. Provide circuit breakers that are
U.L. listed for application at 100% of their con-
tinuous ampere rating in their intended enclo-
sure.
Note to Specifier — For trip units with the
functions of Digitrip OPTIM 750 for SPB or
DSII circuit breakers, insert the following:
Provide Cutler-Hammer/Westinghouse Dig-
itrip OPTIM trip units for SPB or DS circuit
breakers with the following features.
Interchangeable rating plugs shall establish
the continuous trip ratings of each circuit
breaker. Rating plugs shall be fixed type as in-
dicated. Rating plugs shall be unique to a
given breaker frame, and interlocked such
that a breaker cannot be closed and latched
with the rating plug removed.
System coordination shall be provided by the
following microprocessor-based program-
mable time-current curve shaping adjust-
ments. The short time pickup adjustment
shall be dependent on the long time pickup
setting.
●
Programmable long time pickup
●
Programmable long time delay with se-
lectable I
2
t and I
4
t curve shaping
●
Programmable short time pickup
●
Programmable short time delay with se-
lectable flat or I
2
t curve shaping and zone
selective interlocking
●
Programmable instantaneous pickup trip
or alarm
●
Programmable ground fault pickup
●
Programmable ground fault delay with se-
lectable flat or I
2
t curve shaping and zone
selective interlocking
The microprocessor-based trip unit shall have
a powered/unpowered selectable thermal
memory to provide protection against cumu-
lative overheating should a number
of overload conditions occur in quick
succession.
Provide zone interlocking for the short time
delay and ground fault delay trip functions for
improved system coordination. The zone in-
terlocking system shall restrain the tripping of
an upstream circuit breaker and allow the cir-
cuit breaker closest to the fault to trip with no
intentional time delay. In the event that the
downstream breaker does not trip, the
upstream breaker shall trip after the
pre-set time delay.
When the instantaneous adjustment is not
provided, a user selectable discriminator cir-
