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INSTRUCTIONS
GEH-1023C
TEST BLOCKS
AND
PLUGS
TYPE PK-2
INTRODUCTION
The Type PK -2 test blocks and plugs are used
to test switchboard mounted instruments, meters,
and relays when in an electric circuit or by the use
of
a separate source of power. They are available
in either four or six poles and are back connected.
The contacts have line contact.
The Type PK-2 test blocks and plugs are cap
able of carrying 10 amperes at 250 volts continu
ously. They are not intended to interrupt any cur
rent, but will satisfactorily open the circuit
of
a
potential coil and transfer the current coil
of
in
struments, meters, or relays.
RECEIVING
The PK-2 test blocks and plugs are shipped in
i n d i v i d u a l cartons. In the carton. with the test
block, una sse mbled in a s e p a r a t e container, are
sufficient auxiliary contacts for a n y combination
shown in Fig. 8 and
9.
Also p a c k e d in the sep-
arate c o n tai n e r are the n u t s and washers for
the studs; m o u n t i n g screws, washers, and nuts
for m o u n t i n g the test block on steel panels; and
jumpers a n d holding screws for the a uxi l i a r y
contacts.
INSTALLATION
MOUNTING
The block can be mounted on the front surface
of panels 1/8 inch to 2 inches thick or on the rear
surface of a p a n e
1
not more than 1/8 inch thick
(see Fig. 1 and 2}. With both methods
of
mounting,
the cover and test plug are inserted from the front
of the panel.
Before m o u n t i n g on the pane
I,
the auxiliary
Fig.
I
Mounting on Front of Steel Panel
contacts should be assembled according to the com
bination required, as shown in Fig. 8 and
9.
Fig. 3 shows a composite assembly
of
all the
auxiliary contacts. These a r e fastened as shown
by the No.4-48, 5/16 inch round-head screws which
pass through the auxiliary contacts and are threaded
into the inserts in the bottom
of
the block. Auxil
iary contact (1, Fig. 3 ), is used to prevent circuit
interruption when the cover !s removed. This type
I"
Fig.
2
Semi-Flush Mounting on 1/8-inch Steel Panel
These instructions do not purport to cover all details or variations in equipment nor to provide for every possible
contingency to be mel in connection with installation, operation or maintenance. Should further information be desired
or should porticular problems arise
which
are not covered sufficiently for the purchaser's purposes, the matter should
be
referred to the G-ral Electric Company.
GENERAL
.
ELECTRIC
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