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9 Equipment Description
01.4IB.65090A
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PowlVac 38™ CDS Electrical Ground and Test
Devices "Con Ed" version (41588G95) and
Con Ed "Customer" version (41588G96) are
provided with numerous key lock interlocks
and include:
1) Key Lock “K1” (Keys KCF and KB)
The key lock “K1” interlock is a two cylinder
lock used to electrically enable or disable
the ground & test device.
The K1 interlock (Figure 3, o) is a two
cylinder lock equipped with an electrical
switch element. The switch is closed when
the KB key is retained. When the switch
is open, the ground and test device is
electrically disabled and the KCF key is
retained (Figure 3, q) .
The CON ED and CUSTOMER ground and test
devices are supplied with similar interlock
functions. However, the CON ED device uses
Key KU for Key Lock K1 and the CUSTOMER
device uses Key KCF for Key Lock K1. Key KU
and Key KCF are NOT INTERCHANGEABLE.
Although these operating procedures contain
illustrations of the CUSTOMER device, these
procedures also apply to the CON ED device.
For procedures that refer to Key KCF for the
CUSTOMER device, the same procedures apply
to Key KU for the CON ED device.
NOTICE
2) Key Lock “K2” (Keys KB and KC)
The key lock “K2” interlock is a two cylinder
lock used to mechanically lock the ground
and test device ground-making switch in
the “OPEN” position.
The key lock “K2” interlock (Figure 3, f) is
operable only when key “KB” is inserted
and the ground and test device is "OPEN".
When the K2 interlock is operated with the
locking bolt extended, the ground-making
switch is open, the KB key is retained and
the KC key is released (Figure 3, i & k) .
3) Key Lock “K3” (Key KC)
The key lock “K3” interlock is a single
cylinder lock. When the K3 interlock
(Figure 3, l) is locked, the ground and
test device is prevented from being
inserted into or removed from the
connected position of the circuit breaker
compartment.
When the ground and test device is in the
disconnected position, the K3 interlock
prevents the racking device handle from
entering the corresponding racking hole
on the ground and test device, thereby
preventing the insertion of the ground and
test device into the connected position.
When the ground and test device is in
the connected position, the K3 interlock
blocks the racking device drive shaft in the
ground and test device, thus preventing the
device from further movement. This action
prevents the removal of the ground and
test device from the connected position.
With the KC key inserted (Figure 3, m) and
the locking bolt retracted to enable racking
of the ground and test device in or out
of the connected position, the KC key is
retained.