Optional Devices; Operation Counter; Maintenance Closing Device; Electrically Operated Interlock - Siemens RL Series Instructions Manual

Operation Counter

This option consists of a mechanically operated counter
with a bracket that mounts at the bottom of the breaker
mounted auxiliary switch. The counter arm connects
through a spring to the switch-operating arm. The
counter is non-resettable. The breaker must have an
auxiliary switch for installation of this option.

Maintenance Closing Device

This device is a manual charging handle assembly
arranged for use as a maintenance tool. The charge
link is spring loaded and retained to make insertion into
the breaker frame less difficult and a chain retains the
pivot pin. After charging the dosing springs, the handle
must be manually returned to and held in the vertical
position to allow closing the breaker.

Electrically Operated Interlock

This device is an additional solenoid that must be
energized before the breaker can be closed. When the
device is de-energized, the breaker is held TRIP FREE
so that it cannot be closed either electrically or
manually. The device is
Undervoltage trip device and mounts in the same
location as the Undervoltage trip device. The electrically
operated interlock has a mechanical link from the
device to the main shaft of the breaker to hold the
device in the picked-up position when the breaker is
closed. Once closed, the device can be de-energized
without tripping the breaker. There are adjustments for
pickup and dropout voltages of the device. (See chart in
Figure 27 for selectable values)
designed to be energized continuously.

Undervoltage Trip Device

This device automatically trips the circuit breaker on
loss of voltage. The device has time delay settings of
instantaneous, and 1 , or 3 seconds. The rated input
2 ,
voltage, pickup voltage, and dropout voltage are
selectable using DIP switches, as shown in the chart in
Figure 3 1 .
A 0.06" ( 1 . 5mm) g a p should b e maintained between
flap extension and pull link when the device is
energ ized (See Figure 3 1 ) .
The device includes an L E D indicator. When t h e device
is energized and operating normally, the LED flashes. If
the voltage drops below the dropout voltage, the LED
will be on continuously to indicate an impending trip. If
the input voltage exceeds
approximately 1 5% (DC) or
5%
continuously to indicate excessive voltage input.
The device includes an internal fuse. This fuse is not
designed to protect the device, but rather, is intended to
avoid damage to the user's control power supply
event of failure of the Undervoltage device. If the fuse is
blown, damage to the Undervoltage device is likely, and
the device should be replaced.
a derivative of the
The device is
(AC),
the rated voltage by
the LED will be on
in the
26

Latch Check Switch

This option is a small switch mounted on a bracket. The
switch operator is adjusted so the switch is operated by,
and indicates the position of, the breaker trip flap. The
latch check switch may be used in conjunction with the
electrical interlock or Undervoltage devices to delay the
application of voltage to the close coil until the
Undervoltage or Interlock device has picked up.
Static Trip Ill Overcurrent Device
The Static Trip I l l device mounts onto a slide-type
bracket on the circuit breaker. To remove the trip
device, the terminal block cover located above
be removed, exposing the terminal block screws. The
lower row of screws can be loosened with a screwdriver
allowing the cord set fanning strip to be removed from
the terminal block. Removal of the fanning strip
exposes a mounting screw. This screw can be
removed, allowing the trip device to be removed from
the circuit breaker. To remove the trip device, pull the
trip device towards the front of the circuit breaker. See
'Static Trip Ill Information and Instruction Guide',
SG-3 1 1 8.
Bell Ala rm Switch
This u nit functions to operate a switch. A single-pole
double-throw, or a double-pole double-throw switch is
ava ilable. The switch operator is connected to, and is
operated by the tripping actuator. The switch operator
remains tripped even when the actuator is reset by the
circuit breaker. The switch operator must be reset either
manually or by an additional optional e lectrical reset
solenoid.
The contacts of the bell alarm switch can be connected
in series with the circuit breaker closing coil, to provide
a lockout feature to prevent re-closing
overcurrent tripping operation.
Bell A l a rm Relay
This unit functions to provide a momentary closure and
opening of isolated contacts. The Static Trip device
supplies the relay coil in parallel with the tripping
actuator. The contacts return to the normal de­
energized position after short time-delay (0.2-0.5
Second).

Mechanical Lockout

This option consists of a manual reset for the tripping
actuator, with the norm a l automatic reset disabled. The
breaker is held trip free following an overcurrent trip,
until manually reset.
it
should
after an