Type PK-2 Test Blocks and Phtgs
GEH
-1023C
The p u r p o s e
of
the test plug is to facilitate
routine c h e c k testing. They can be permanently
connected to any testing equipment. Insertion
of
a
plug in the test block isolates the auxiliary contacts,
when used, and establishes t e s t connections (see
Fig.
7).
Links or jumpers are provided (see Fig, 6)
to facilitate making connections. The test blocks
have guide rods and interlocking slots so the cover
and plug must be inserted squarely, and in the same
position every time. Holes are provided in the guide
rods and cover through which seal wires may be
threaded to p r e v e n t unauthorized removal
of
the
cover from the test blocks,
·Fig.
6
Alternative Link for Four-Pole and
Six-Pole Plugs
This illustration shows a schematic sectional view
of
the test -block cover and plug. (a) With cover
in place and the plug contact in the cover making a connection through the block and remo�g the short
circuit by the auxiliary contact. (b) With cover and plug removed, used for circuit in which there is no
current transformer. (c) With the plug inserted and the plug contacts removing the short circuit by
the
auxiliary contact. (d) With cover and plug removed and with auxiliary contact short-circuiting the trans
former secondary.
(0)
(b)
(c)
(
a
)
Po ten tiol
(b)
Current
(
c
)
Current and Trip
Fig.
7
Schematic Sectional Views of Test Blocks
Polen
I
i a
I
�
� �
(d) Current
R elay
(e) Curren
I
Relay and Trip
(f)
Current
Fig. 8
oooooo
'O""!r"!l""'"�
Fig.
9
Internal Connections of Four-Pole Block
(d)
Current and Trip
ooootrtr
(
g
)
(
e
)
Re loy ond Trip
(
h
)
(
f
)
Current
(
i
)
Internal Connections of Six�Pole Block
Current
0
o
0 0 0
Current and
0
o o�
Potentia
I
Current and Trip
0
3
www . ElectricalPartManuals
. com
www
. ElectricalPartManuals
. com
