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3.1. Receiving and Handling
Each Manual Ground and Test Device is carefully
inspected and then packed by workmen experienced
in
proper
handling
Immediately upon receipt of a device, an examination
should be made for any damage sustained during
shipment. If injury or rough handling is evident, a
damage claim should be filed at once with the
transportation company, and the nearest General
Electric Company sales office should be notified
promptly.
The device should be removed from the crating with
sufficient care so that no damage will result from
rough handling. "Loose parts" associated with the
apparatus may be included in the crate. Care should
be taken to make certain that these parts are not
overlooked.
The Manual Ground and Test Device consists of a
Power/Vac* circuit breaker mechanism frame (10) Fig,
2, on which three insulation supports (11) Fig. 2, are
mounted to support the primary extension bars (5),
Fig, 2, and connections bars (1, 2, 3) Fig. 2. A front
cover (13) Fig. 2, supports the shutter (6) Fig. 1,
extension bar insulator (12) Fig. 2, and the label
system, which indicates upper or lower compartment
and bus or line/load terminals. A Ground terminal (5)
Fig. 1 is provided at the lower right corner of the
device. Six extension bars (1) Fig. 1, for the bus and
line/load terminals are brought forward towards the
front cover. For grounding equipment, only the three
upper studs or the three lower studs should be
exposed at any one time. Indicator rods (14) Fig. 2, and
(2) Fig. 1, show when connections bars are connected
to particular extension bars. A shutter (6) Fig. 1, can be
moved Manually from inside the front cover to cover
the upper or lower set of extension bars not
connected to the connection bars in rear. For phasing
test, both upper and lower extension bars need to be
exposed. For this the shutter (6) Fig. 1, should be
RECEIVING, HANDLING AND STORAGE
3.
of
electrical
equipment.
4.
3.2. Storage
The Manual Ground and Test Device should be
carefully protected against condensation. Store it in a
dry environment at moderate temperatures 40°F to
100°F since water absorption has an adverse effect on
insulation components. The storage area should be
clean, free from corrosive gases, fumes and dust-free.
If the device is stored for any length of time, it should
be inspected prior to use to verify that corrosion has
not started and to insure proper working mechanical
condition. Should the device be stored under
unfavorable conditions, it should be cleaned and dried
out before being placed in service.
DESCRIPTION
removed. Remove the shutter by completely undoing
the retaining screws (9) Fig. 1, and raising the shutter
until it clears the front cover.
The Manual Ground and Test Device is equipped with
a compartment elevation (upper and lower) selector
lever (3) Fig. 1, on the lower left hand corner of front
cover. This lever serves to operate an interlock system
coupled to sliding labels on the front cover, which
shows whether the device is set up for the upper or
lower
compartment
terminals. In switchgear equipment, the upper
compartment line/load studs are on top and the bus
studs on the bottom. For the lower compartment, the
opposite exists, namely the bus studs are on top and
the line/load studs are on bottom. Thus, the device
compartment elevation label (upper and lower) must
correspond to the equipment compartment elevation
before the device can be inserted. If a mismatch
exists, the interlock interference mechanism will
prevent insertion of the device into the compartment.
4
and
identify
the
primary
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