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Instruction Book IB182312EN June 2016 www.eaton.com
50/75/150 VCP-W
Selectable Ground and Test Device
SECTION 5: INSTALLATION & INSPECTION
WARNING
BEFORE PLACING THE SELECTABLE GROUND AND TEST DEVICE IN
SERVICE, CAREFULLY FOLLOW THE INSTALLATION PROCEDURE BELOW
AND THE SAFE PRACTICES SET FORTH IN SECTION 2. NOT FOLLOWING
THE PROCEDURE MAY RESULT IN INCORRECT SG&T DEVICE OPERATION
LEADING TO DEATH, BODILY INJURY, AND PROPERTY DAMAGE.
When the SG&T device is first used and each time it is used in the
future, it should be carefully examined and checked to make sure it
is operating correctly.
5.1 EXAMINATION FOR DAMAGE
Examine the selectable ground and test device for loose or obviously
damaged parts. Never attempt to install nor operate a damaged
selectable ground and test device.
5.1.1 NAMEPLATE VERIFICATION
Verify the information on the new SG&T device matches the
information on the purchase order. If any discrepancies exist,
notify Eaton’s Electrical Services & Systems for resolution prior to
proceeding.
DANGER
FAILURE TO IDENTIFY THE ENERGIZED TERMINALS INSIDE THE
SWITCHGEAR CIRCUIT BREAKER COMPARTMENT WILL CAUSE DEATH,
SERIOUS INJURY, AND/OR PROPERTY DAMAGE. USE NOT ONLY A
RIGOROUS LOCK-OUT, TAG-OUT SCHEME BUT ALSO LOCALIZED TESTING
WITH APPROVED TESTING PROBES TO CONFIRM THAT THE CIRCUIT TO BE
GROUNDED IS DE-ENERGIZED. CONFIRM THAT FOREIGN POWER SOURCES
ARE NOT BACK-FEEDING INTO THE DE-ENERGIZED BUS.
CAUTION
WHEN THE SELECTABLE GROUND AND TEST DEVICE IS RACKED TO
THE ‘CONNECTED’ POSITION IN THE SWITCHGEAR CIRCUIT BREAKER
COMPARTMENT, THE LINE AND LOAD PRIMARY DISCONNECTS ENGAGE
THE STATIONARY PRIMARIES. IF ONE SET OF PRIMARIES IS ENERGIZED,
IT IS STRONGLY ADVISED THAT THE TERMINAL ACCESS DOOR REMAIN
CLOSED AND LOCKED TO BLOCK ACCESS TO THOSE TERMINALS. THE
KIRK™ LOCKS (WHEN PROVIDED) SHOULD BE INCORPORATED IN A ‘LOCK-
OUT, TAG-OUT’ SCHEME. USE APPROPRIATE LOCKING PROVISIONS TO
PREVENT INADVERTENT ACCESS. THIS SELECTABLE GROUND AND TEST
DEVICE MUST BE OPERATED BY A QUALIFIED OPERATOR USING A WELL
MAINTAINED AND CERTIFIED ‘HOT STICK’.
NOTICE
BECAUSE THERE ARE UNIQUE APPLICATIONS AND A VAST VARIETY OF
POWER SYSTEMS, THE SAFE OPERATING PROCEDURE FOR THE USE OF
THIS SELECTABLE G&T MUST BE DEVELOPED BY THE END USER BEFORE
THE SELECTABLE GROUND AND TEST DEVICE IS INSTALLED IN THE
CIRCUIT BREAKER COMPARTMENT.
5.2 OPERATING PROCEDURE
Please totally familiarize all SG&T users with this operating
procedure prior to inserting the SG&T into the circuit breaker
compartment.
5.2.1 SELECTABLE GROUND AND TEST DEVICE
PREPARATION
Use the following guidelines to prepare the SG&T for insertion in a
circuit breaker compartment.
a. This selectable ground and test device has a hotstick operable
moving blade that is retained in a neutral position between the
upper and lower terminals by a metal retainer. When the latch
ring handles are at a 90 degree angle to the front of the SG&T,
the selector blades are retained in the neutral, parked position.
Confirm that the removable insulating barriers are in place
above and below the selector blades. THIS SG&T MUST BE
INSTALLED IN THE CIRCUIT BREAKER COMPARTMENT WITH
THESE SELECTOR BLADES IN THE NEUTRAL POSITION.
b. For SG&T devices equipped with Kirk™ Locks on the terminal
access doors, use the Kirk™ key provided to release the special
bolt that is held by the Kirk™ locking system. Slide this bolt
from the Kirk™ lock on the SG&T front cover to allow the door
to be opened. The special bolt is retained on the door. See
Figure 5.1.
c. Access the terminal set to be grounded by opening the upper
or lower access door. The access doors have friction-style
hinges that will hold the access door open. (See Figure 5.2).
The tension of these friction hinges may be adjusted using a
Phillips-type screw driver.
d. Locate the three insulating barriers that separate the
neutral position of the selector blades from the terminal set
compartment to be grounded (Figure 5.3). Each of these three
barriers must be removed to allow selector blade to swing to
the terminals to be grounded. These removable barriers should
be safely stored for re-installation before returning the SG&T
to its storage area. These barriers should be removed prior
to installing the SG&T in the circuit breaker compartment and
re-installed after the SG&T has been removed from the circuit
breaker compartment.
e. Close the terminal access door prior to installing the G&T in the
circuit breaker compartment.
f. Install the SG&T in the circuit breaker compartment following
the instructions in paragraph 5.4 of this instruction bulletin.
Use the Personal Protective Equipment (PPE) required by local
authorities having jurisdiction.
5.2.2 SELECTABLE GROUND AND TEST DEVICE
OPERATION
The following procedures are intended to supplement, but not
replace, the site specific instructions developed by authorities having
jurisdiction for use of this selectable ground and test device.
a. Using the appropriate PPE, open the terminal access door for
the terminals to be grounded. Verify that the SG&T terminals
are de-energized. Confirm that the friction hinges of the
terminal access door holds the door open. Start at phase ‘a’,
the pole to the left as one faces the SG&T.
b. The terminal selector blade is moved from the neutral, parked
position by using the hook of a ‘hotstick’ to move the latch
ring to the left slightly to free the blade from its retainer. A
downward force on the latch ring will move the blade to the
lower terminal; upward force on the latch ring will move the
blade to the upper terminal. A mechanism in the blades spreads
them slightly as the latch ring is moved to allow proper blade
engagement with the stationary blades; a clamping and latching
action is applied once the blade engages its mating terminal.
c. Repeat steps ‘b’ for the center pole and the right pole of the
SG&T respectively.
d. With the selector blades fully engaged in the terminals, the
blades are latched so that they cannot swing open in the event
that the circuit is inadvertently energized.
e. With the terminals safely grounded, perform the tasks and tests
required as required. When that work is complete, proceed to
step ‘f’.
f. Use the hotstick to hook the selector blade latch ring on the
selector blade (Figure 5.4 and 5.5). Move the latch ring to move
the blade toward the neutral position between the terminals,
Figure 5.6. Move the blade slightly to the left to clear the
retaining ‘ears’ of the neutral position retainer then allow the
blade to move to the right so that it is retained by the retainer.
