Technical data

Standard accessories include:
Manual racking crank
Manual spring charging crank
Drawout extension rails (facilitate
handling of circuit breakers in outdoor
non-walk-in switchgear or drawout fuse
trucks when located above floor level)
Lifting sling (for circuit breakers or
drawout fuse trucks located above floor
level)
Split plug jumper (standard unless test
cabinet is furnished)
Contact lubricant
Touch up paint.
Optional accessories include:
Lift device (facilitate handling of circuit
breakers in outdoor non-walk-in
switchgear or drawout fuse trucks
when located above floor level)
Test cabinet (in place of split plug
jumper)
Test plugs (if required by devices)
Electric racking motor assembly (to
enable racking while operator is at a
distance from the switchgear)
Manually or electrically operated
ground and test device.
Test provisions, either a split plug jumper
or a test cabinet, are available for testing
the circuit breaker outside its cubicle.
The split plug jumper is used to bridge
the secondary disconnects with a flexible
cable, so the circuit breaker may be
electrically closed and tripped with the
control switch on the instrument panel
while the circuit breaker is outside of its
compartment. The test cabinet, including
a control switch, is used for closing and
tripping the circuit breaker at a location
remote from the switchgear.
Manually operated ground and test
device
This is a drawout element that can be
inserted into a circuit breaker cell. It
opens the shutters, connects to the cell
primary disconnecting contacts, and so
provides a means to make the primary
disconnect stabs available for testing. It is
suitable for high-potential testing of
outgoing circuits of the switchgear main
bus or for phase-sequence checking. It
also provides a means to connect
temporary grounds to de-energized
circuits for maintenance purposes. Either
three-stud or six-stud devices are
available.
Electrically operated ground and test
device
An electrically operated ground and test
device includes a power operated switch
(derived from a type 38-3AH3 circuit
breaker) arranged to allow grounding
one set of disconnect stabs. Two devices,
one each for the upper and lower stabs,
are required if grounding is desired to
either side of the unit. The device
includes test ports to allow for testing for
presence of voltage on both the line side
and the load side of the cell. The device
also provides a means of access to the
primary circuits for high-potential tests or
for phase-sequence checking. These
devices are able to close and latch against
short-circuit currents corresponding to
the ratings of the equipment. Due to the
unique requirements frequently involved
in such devices, all applications of
electrically operated ground and test
devices should be referred to Siemens
for review.
Note: Each user must develop definitive
operating procedures for incorporating
safe operating practices. Only qualified
personnel should be allowed to use
ground and test devices.
Accessories
13
Figure 14: Manually operated ground and test device
with doors open and closed
Figure 15: Electrically operated ground and test
device