GE Gerapid 2607 User Manual page 56

7.3 Glossary
a-release – see Shunt trip device;
Activating magnet – see Cl osing drive;
Anti-pumping device – see SU control PCB. Prevents reclosing
after a close-open operation, as long as the device initiating
closing is maintained in the position for closing
Arc runners – (also: arc probes; arc horns). Provide safe arc
leading into the arc chute. There are two arc runners mounted
in Gerapid breaker, front and back.
Arcing contact – – (also: pre-contact; arcing pre-contact). An
arcing contact on which the arc is intended to be established, to
avoid wearing and burning of the main contacts. It is mounted
at the top of fl exibl e band. It is easy to replace. Spring loaded to
maintain proper contact force.
Auxiliary contact – (also: make/break contact; a-/b-contact,
changeover contact, convertibl e contact). A contact included in
an auxiliary circuit and mechanically operated by the breaker.
Auxiliary switch – (also: auxil iary switch; make/break contact; a-
/b-contact). A switch block containing up to 10 auxiliary con-
tacts,. Mechanically operated by the mechanism of the breaker
during switching operations. Auxiliary switch block is mounted
in lower compartment of the control box. Every contact can be
either NO or NC, configured by appropriate wiring.
Closing drive – (al so: activating magnet; closing sol enoid; sol e-
noid drive). High power, black solenoid coil, mounted at the front
of the breaker, below the control box. Use for electric and re-
mote closing of the main contacts. Power consumption is up to
2.6kW. Closing time is ~150ms.
Closing operation – (also: switching ON; CLOSE operation). It is
operation, by which the breaker is brought from the OPEN posi-
tion to the CLOSED position.
Closing solenoid - see Cl osing drive;
Control circuit terminals – (also: control sockets/pl ugs). Fully in-
sulated sockets at the front cover of control box. Intended for
external connection to the auxiliary and control circuits.
ED coil – (also: el ectro-dynamic coil ). An impulse coil release. Ac-
tuating element of ED impulse release, mounted on the base,
under the mechanism.
Electro-Dynamic impulse release – (also: ED tripping; impul se
rel ease). Release device, consist of actuator (ED coil) and control
circuit (NEKO PCB with C-bank). This is an auxiliary release, acti-
vated by high-energy impulse of current. The impulse is shaped
by internal (NEKO) or external C-bank. Opening time is less 3ms.
Time to charge capacitors is ~15sec.
Forced tripping release – (also: FTU; forced tripping device/unit).
Fully insulated, direct, mechanical tripping pin, mounted thru
the bottom of the breaker. The breaker will be tripped open, by
pushing of this pin upward,
Lever for manual operating – (also: hand l ever). Hand lever can
be used for both, closing and opening manual operation. It is in-
tend for use only during maintenance.
M ain circuit – (also: mains; primary circuit; current path). All the
conductive parts of the breaker included in the circuit, which is
intend to close or open. It consists of: main terminal s (upper and
l ower), fixed contact, fl exibl e band and lower bus bar.
M ain terminals – (also: main connections). Two conductive bars
provided for electrical connection to external main circuit. Dif-
ferent configurations are avaiable.
NEKO control PCB – (also: ED coil control unit; internal C-bank
control ). Control circuit PCB to supervise the operation of the ED
coil. It consists of control circuit and bank of capacitors. Re-
quired to energize the ED impulse coil.
2009-09-02 S47183e rev.03
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Design and specifications are subject to change without notice
OCT – see Over-Current rel ease;
Opening operation – (also: switching OFF; OPEN operation). An
operation by which the breaker is brought from the CLOSED
Over-Current release – (also: OCT). An instantaneous and direct
acting mechanical release. Tripping the breaker in case of over-
loads and short circuits. Is adjustable within predetermined
range. Opening time depends on short circuit conditions and
shall not exceed 5ms. Oct is activated be means of magnetic
energy from main circuit. Requires no external control power.
Position indicator – (also: position indicating device). A me-
chanical device mounted at the front of closing drive. Indicates
whether the breaker is in the open or closed position.
CLOSED position is marked as "I".
OPEN position is marked as "O".
Pre-contact – see Arcing contact;
r-release – see Zero vol tage rel ease;
SEL – Current measurement system, consisting of sensing ele-
ment and control circuit. The sensor is an insulated tube,
mounted on the top terminal of the breaker. Utilizes two Hall's
probes for sensing the current and direction. The proportional
voltage signal is transmitted to control circuit, placed in control
box. The SEL control PCB is an opto-isolated transducer, which
generates standard output signals proportional to measured
current.
SEL control PCB – a control circuit PCB. Controls and transforms
current measurement signal from SEL sensor.
Self cut-off function– A safety feature provided to avoid over-
stressing of the closing drive and shunt trip release. Closing
drive is automatically cut-off from power source after 500ms.
Shunt trip coil is connected in series with auxiliary contact(s),
which cause cut-off after breaker's opening.
Shunt trip release – (also: ST; shunt rel ease; a-rel ease). Instanta-
neous release energized by means of voltage signal. Within
50ms trips the breaker's mechanism. Use for remote OPEN op-
eration. ST can be activated by potential free contact or by di-
rectly applied voltage from external source. ST can have a single
or double winding.
Solenoid drive - see Cl osing drive;
ST control PCB – control circuit PCB supervising the operation of
shunt trip release.
SU control PCB – control circuit PCB supervising the remote
closing operation by means of solenoid drive. Presents in every
breaker, and placed in control box. Provides also anti-pumping
and self cut-off functions.
Switching ON – see Cl osing operation;
Switching OFF – see Opening operation;
Trip-free device – A mechanical switching device, the moving
contacts of which return to and remain in the open position
when the opening operation is initiated after the initiation of the
closing operation, even if the closing command is maintained.
To ensure proper breaking of the current, which may have been
established, it may be necessary that the contacts momentarily
reach the closed position.
UVR control PCB - control circuit, designed as a single PCB, for
supervising the zero-voltage release device.
Zero-voltage release – (also: under-vol tage; UVR; r-rel ease). An
auxiliary tripping device. Trips the breaker open on control volt-
age loss. Opening time is less 75ms. It is used for remote OPEN
operation or control voltage supervision. Interchangeable op-
tion with shunt trip release. Activated by means of auxiliary "po-
tential free", NO or NC contact.
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