13
Instruction Book IB182312EN June 2016 www.eaton.com
50/75/150 VCP-W
Selectable Ground and Test Device
4.6 DEVICE AMPERAGE CONVERSION PROCEDURE
The VCP-W-SGT may be optionally provided with interchangeable
primary disconnects. When so equipped, the extra primary
disconnects and code plates are boxed separately.
The primary circuit terminals of the selectable ground and
test device consists of silver plated copper conductors with
interchangeable primary disconnects. The same primary
disconnects are used for 1200 and 2000 ampere applications; the
SG&T must be converted for 3000 ampere SG&T use. Primary
disconnecting contacts are bolted to the lead assemblies; these
primary disconnects are configured to engage the circuit breaker
compartment primary disconnects. It is critical to confirm that
1200/2000 ampere primary disconnects are installed prior to
insertion in 1200/2000 ampere circuit breaker compartments;
likewise for tests in 3000 ampere circuit breaker compartments.
THIS CONVERSION ALSO REQUIRES A CODE PLATE CHANGE
PRIOR TO RACKING THE SG&T INTO ITS CIRCUIT BREAKER
COMPARTMENT.
Follow the procedure below to convert from one
primary current design to the other.
a. With the selectable ground and test device located in an
appropriate work area, remove the existing primary disconnects
installed on the SG&T. Retain the hardware for re-use. Figure 4.3.
b. After removing the primary disconnect assembly, locate the
primary disconnects to be installed and install them on the
lead assemblies using the hardware just removed. The primary
disconnects just removed should be properly stored to avoid
potential damage. Figure 4.4.
otee:
N
Ensure shims are installed as shown in Figure 4.5 for the 3000A
configuration.
c. THE GROUND AND TEST CODE PLATE MUST BE CHANGED AT
THIS TIME. The SG&T device will be blocked from full insertion in
the circuit breaker compartment until the code plate is changed.
The code plate is a mandatory safety feature that must not be
removed and/or discarded.
d. Left hand and right hand code plates are installed on the lower
part of the SG&T frame below ‘C’ phase. The right hand code
plate is mounted adjacent to rail to which the wheels are
attached; the left hand code plate is mounted to the left of the
right hand code plate. The left hand code plate is used for the
continuous current rating, the right hand code plate corresponds
to the short circuit capabilities of the device. Eaton offers many
code plate combinations for accepting or rejecting devices
based on their continuous current rating, short circuit current
rating, speed of contact parting (3-cycle or 5-cycle) and other
classifications; consult your Eaton representative for complete
code plate availability. Table 4.1 provides the code plate
information for 15 kV SG&T devices that have a short time rating
of 50 kA.
Table 4.
Nominal Voltage /
Short Time Rating
Cubicle Current
Rating
Cycle
Class
Device LH Code
LH Style Code
Plate
Device RH Code
RH Style Code
Plate
15 / 50
1200
5
K = 1
12000
8061A47H06
10012
8061A42H01
15 / 50
2000
5
K = 1
11000
8061A38H06
10012
8061A42H01
15 / 50
3000
5
K = 1
20000
8061A40H06
10012
8061A42H01
Examplee:
If the SG&T is to be used only in switchgear rated for 48-49 kA, only the Left Hand code plate would be changed to allow insertion of the 1200A,
2000A, or 3000A configured device.
Figure 4.9. 50/75/150 VCP-W with optional LINE/LOAD and
PHASE labels
