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IB131012EN
Effective March 2016
The power to operate the grounding breaker in this device is
•
obtained through the secondary disconnect in the switchgear
compartment.
The grounding breaker cannot be opened electrically in less
•
than 20 seconds after closing. This feature permits the source
interrupter to clear a fault if the grounding breaker is inadver-
tently closed on an energized circuit (see Appendix C).
The control switch cable is connected to the device with a
•
twist lock connector.
WARNING
IMPROPER USE CAN RESULT IN DEATH, SERIOUS PERSONAL INJURY, OR
PROPERTY DAMAGE.
2.3 Interlocks - basic elements description
There are five interlocks located on the front of the 38 kV SEG&TD.
They are labeled as Lock #1 through Lock #5. The labels also identify
the key(s) to be used in the locks as KB, KC, KD, and KU. Locks #1,
2, and 4 are two cylinder locks while locks #3 and 5 are single cylin-
der locks (see Figure 7 and Table 1 for details).
Lock 5
Lock 2
Lock 3
Figure 7. Interlock locations on the front of the 38 kV SEG&TD.
Table 1. 38 kV SEG&TD interlock details.
Lock
# of Cylinders
Key(s) Required
Lock #1
2
KB
Lock #2
2
KB
Lock #3
1
KC
Lock #4
2
KB
Lock #5
1
KD
There is also a mechanical lift lock that, when locked, prevents the
operation of the "Push to Open" and "Push to Close" buttons.
4
EATON www.eaton.com
Lock 4
Lock 1
KU
KC
-
KD
-
38 kV Type VCP-WHD Simple Electrical
Ground & Test Device (SEG&TD) upper
2.3.1
Single cylinder locks
Single cylinder locks are used in two positions on the 38 kV
SEG&TD: Locks #3 and 5. Single cylinder locks have two positions:
locked or unlocked.
Figure 8. Typical single cylinder lock (38 kV SEG&TD Lock #5
shown).
In a single cylinder lock, when the key is inserted into the lock and
turned to the "locked" position, the associated 38 kV SEG&TD func-
tion will be inoperable and the key can be removed. When the key
is in the lock and turned to the "unlocked" position, the associated
38 kV SEG&TD function will be operable and the key is captive in
the lock.
Figure 9. Typical single cylinder lock in the "Locked" position
with the key ready for removal.
2.3.2
Two cylinder locks
Two cylinder locks are used in three positions on the 38 kV SEG&TD:
Locks #1, 2, and 4. Two cylinder locks have four positions (two for
each key): key 1 locked or unlocked and key 2 locked or unlocked.
terminal instruction booklet
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