Advertisement
Section 5. EntelliGuard Breaker
Section 5. EntelliGuard Breaker
normally open and one normally closed contact.
normally open and one normally closed contact.
The position switch is used to indicate the drawout
The position switch is used to indicate the drawout
position of the breaker
position of the
breaker, and
, and the switch contacts
change state when the breaker is moved between
change state when the breaker is moved between
the CONNECT and the TEST positions. The two
the CONNECT and the TEST positions. The two
contacts on the position switch are wired to the
contacts on the position switch are wired to the
Messenger in the breaker cubicle and provide
Messenger in the breaker cubicle and provide
breaker dra
break
er drawout
wout position indication on the
position indication on the Breaker
Status screen at the HMI. They can also be used in
Status screen at the HMI. They can also be used in
any Flex Logic control scheme.
any Flex Logic control scheme.
Spring Charge Indicator Switch
Spring Charge Indicator Switch
The spring charge indicator switch is provided on
The spring charge indicator switch is provided on
all electrically operated EntelliGuard circuit breakers
all electrically operated EntelliGuard circuit breakers
and is wired to the Messenger. This contact provides
and is wired to the Messenger. This contact provides
status of the circuit breaker closing springs on the
status of the circuit breaker closing springs on the
Breaker Status screen at the HMI and can also be
Breaker Status screen at the HMI and can also be
used in Flex Logic control schemes.
used in Flex Logic control schemes.
Remote Close Accessory with One-Shot
Remote Close Accessory with One-Shot
Electronic Close Circuit
Electronic Close Circuit
The remote close accessory is an electrically
The remote close accessory is an electrically
operated solenoid which, when energized through
operated solenoid which, when energized through
the HMI or a Flex Logic control scheme, closes the
the HMI or a Flex Logic control scheme, closes the
EntelliGuard circuit breaker. The
EntelliGuard circuit breaker
accessory
accessory consists o
consists of the
f the "one-shot" electr
close circuit, with built-in anti-pump feature, and
close circuit, with built-in anti-pump feature, and
the closing solenoid. The remote close accessory
the closing solenoid. The remote close accessory
is continuously rated and operates as follows.
is continuously rated and operates as follows.
Applying control voltage to the close circuit through
Applying control voltage to the close circuit through
the Messenger produces a 250ms pulse to the
the Messenger produces a 250ms pulse to the
closing coil which, in turn, releases the energy stored
closing coil which, in turn, releases the energy stored
in the closing springs. The anti-pump feature prevents
in the closing springs. The anti-pump feature prevents
the breaker from repeatedly closing if the close
the breaker from repeatedly closing if the close
signal is maintained. The Messenger provides a
signal is maintained. The Messenger provides a
momentary
momen
tary close sign
close signal (1⁄2 second durati
al (1⁄2 second duration)
whenever the HMI or Flex Logic issues a close
whenever the HMI or Flex Logic issues a close
command. Reset time for the anti-pump circuit is
command. Reset time for the anti-pump circuit is
approximately 2.5 seconds.
approximately 2.5 seconds.
Secondary Disconnect
Secondary Disconnect
All EntelliGuard breakers are furnished in drawout
All EntelliGuard breakers are furnished in drawout
constructio
construction. The interface between the
n. The interface between the breaker and
the Entellisys system occurs through a rugged,
the Entellisys system occurs through a rugged,
36-po
36-point seconda
int secondary ry disco
disconnect mounte
top of the circuit breaker. The secondary disconnect
top of the circuit breaker. The secondary disconnect
is engaged when the breaker is in the CONNECT and
is engaged when the breaker is in the CONNECT and
TEST positions and is disengaged when the breaker
TEST positions and is disengaged when the breaker
is in the DISCONNECT position. A feedback mecha-
is in the DISCONNECT position. A feedback mecha-
nism is provided on the secondary disconnect to
nism is provided on the secondary disconnect to
confirm to Entellisys that the secondary disconnect
confirm to Entellisys that the secondary disconnect
the switch contacts
Breaker
. The remote close
remote close
"one-shot" electronic
onic
on)
breaker and
nnect mounted on
d on the
the
is properly engaged. Status of the secondary
is properly engaged. Status of the secondary
disconnect (Connected or Disconnected) is shown
disconnect (Connected or Disconnected) is shown
on the Breaker Status screen at the HMI.
on the Breaker Status screen at the HMI.
Shunt Trip
Shunt Trip
The shunt trip allows remote electrical opening of
The shunt trip allows remote electrical opening of
the EntelliGuard circuit breaker through the HMI
the EntelliGuard circuit breaker through the HMI
and Flex Logic. The shunt trip is supplied on all
and Flex Logic. The shunt trip is supplied on all
electrically operated breakers and is not available
electrically operated breakers and is not available
on manually operated breakers. The shunt trip coil
on manually operated breakers. The shunt trip coil
is rated for intermittent duty and is supplied with
is rated for intermittent duty and is supplied with
an auxiliary switch contact that automatically
an auxiliary switch contact that automatically
removes control power from the coil when the
removes control power from the coil when the
breaker opens.
breaker opens.
Spring Charging Motor
Spring Charging Motor
The spring charging motor is supplied on all elec-
The spring charging motor is supplied on all elec-
trically operated EntelliGuard circuit breakers. The
trically operated EntelliGuard circuit breakers. The
breaker closing springs
breaker clo
sing springs are
when control voltage is
when control voltage is applied to the
typically occurs when the breaker is racked in to
typically occurs when the breaker is racked in to
the cubicle and the
the cubicle
and the secondary
secondary disconnect engages.
When the breaker closing springs are fully charged,
When the breaker closing springs are fully charged,
a a cutoff switch de-ener
cutoff switch de-energizes the charging
gizes the charging motor
The closing springs will recharge automatically
The closing springs will recharge automatically
after a breaker closing operation. If control power
after a breaker closing operation. If control power
is lost during the spring charging cycle, spring
is lost during the spring charging cycle, spring
charging can be completed using the integral
charging can be completed using the integral
manual pump handle.
manual pump handle.
Ratings
Ratings
The EntelliGuard breaker is
The EntelliGuard
breaker is available in
2000, 3200, 4000, and 5000 amp frame sizes with
2000, 3200, 4000, and 5000 amp frame sizes with
short circuit interrupting ratings from 30kA to 200kA.
short circuit interrupting ratings from 30kA to 200kA.
The model number of the breaker indicates its
The model number of the breaker indicates its
interrupting capacity (IC). EGS indicates "Standard
interrupting capacity (IC). EGS indicates "Standard
IC," EGH indi
IC,"
EGH indicates "Hi
cates "High IC,
gh IC," " EGX ind
IC,"
IC," and EGF
and EGF indicates "Fused.
indicates "Fused. " "
High IC
High IC and Ex
and Extended
tended IC brea
IC breakers
larger kVA substation transformers as well as in
larger kVA substation transformers as well as in
paralleling applications. Fused circuit breakers have
paralleling applications. Fused circuit breakers have
a a 200kA IC rati
200kA IC rating for use in large net
ng for use in large network syst
Table 5.1 lists the interrupting capacities (IC) for
Table 5.1 lists the interrupting capacities (IC) for
EntelliGuard breakers at
EntelliGuard
breakers at system o
Catalog Numbers
Catalog Numbers
A A unique catalog
unique catalog number identifies
number identifies all Entell
breakers. The catalog number contains information
breakers. The catalog number contains information
on the breaker frame rating (continuous current
on the breaker frame rating (continuous current
and short circuit), the fuse rating (if equipped with
and short circuit), the fuse rating (if equipped with
are charged automatical
charged automatically ly
applied to the breaker
breaker. This
. This
disconnect engages.
motor. .
available in 800, 1600,
800, 1600,
EGX indicates "E
icates "Extended
xtended
kers are
are used w
used with
ith
work systems.
ems.
system operating voltages.
perating voltages.
all EntelliGuard
iGuard
21
21
Advertisement
