Eaton Indoor MVS-ND, Инструкция пользователя

Страница: 6 / 20

6
Instruction Booklet IB022003EN
Effective April 2018
Revision #3
Instructions for installation, operation, and
maintenance of Type MVS-ND, metal-enclosed
switchgear assemblies: 4.76 kV or 15.0 kV class
EATON www.eaton.com
 WARNING
OPERATING AN MVS-ND OR MVS-ND SWITCH WITH A KEY INTERLOCK
BOLT EXTENDED WILL RESULT IN EQUIPMENT DAMAGE AND MAY ALSO
EXPOSE A PERSON TO BODILY INJURY OR DEATH. THE KEY MUST BE
INSERTED INTO THE INTERLOCK AND ROTATED TO RETRACT THE LOCKING
BOLT BEFORE OPERATING AN MVS-ND SWITCH.
Ratings and standards
Table 2. MVS-ND Switchgear Voltage and Frequency Ratings,
RMS Values
Description 4.76 kV Class 15 kV Class
Rated maximum design voltage 4.76 kV 15 kV
Impulse withstand voltage, BIL
a
60 kV 95 kV
Power frequency withstand voltage 19 kV 36 kV
Rated frequency 60 Hz 60 Hz
a
Basic Impulse Level (BIL).
Table 3. MVS-ND Switchgear Main Bus Current Rating for
Short-Circuit Capability of 63.8 kA Peak for 10 Cycles.
For the Main Bus Continuous Current Rating
800 A
Rating
1200 A
Rating Related Capability
Momentary current rating, kA peak 65 65
Short-time current rating, 2 seconds, kA symmetrical 25 25
Table 4. MVS-ND Switchgear Main Bus Current Rating for
Short-Circuit Capability of 97 kA Peak for 10 Cycles.
For the Main Bus Continuous Current Rating
800 A
Rating
1200 A
Rating Related Capability
Momentary current rating, kA peak 99 99
Short-time current rating, 2 seconds, kA symmetrical 38 38
Table 5. MVS-ND Switch Standards.
Description Standards Document
Underwriters Laboratories (UL) or Canadian Standards
Association (CSA) listing to:
ANSI/IEEE C37.20.3
ANSI C37.57
CSA listing only to: CAN/CSA C22.2 No 31
Installation
For more information regarding the receiving, handling, storing and
installation of the equipment, please reference the “Instructions
for receiving, handling, storing and installation of medium voltage
switchgear” in addition to customer drawing package .
Refer to shipping list for location of the bus, hardware, and all other
joining and installation material .
Floor requirements
The finished foundation surface shall be flat and level within
0 .06 in . (1 .6 mm) in 36 in . (914 mm) in any direction, left to right,
front to back, and diagonally . Alternatively a local flatness “FF” value
of 50 or higher and an accompanying “FL” value of 37 to 40 as
defined in industry standard ASTM-E1155-96 and industry standard
ACl 117-90 may be used to establish the flatness and levelness of
the finished foundation .
Joining type MVS-ND enclosures
Access to MVS-ND switchgear vertical sections
containing switches
Each MVS-ND switch is shipped from the factory in the closed
position to maintain alignment during shipping and handling . When
handling MVS-ND switchgear, confirm the switches are in the closed
position . The safety interlocking prevents opening of the door of the
vertical section when the switch is closed .
In order to gain access to the interior, be sure the switchgear is on
a true and level surface according to the floor plan of the customer
drawings . To open a manually operated MVS-ND switch, insert the
operating handle and push down . When the switch opens, the door
may be opened .
Identification of shipping splits
Refer to the front view on the switchgear assembly drawing
supplied with the switchgear . Beneath this view, shipping splits will
be identified in relation to group numbers for each vertical section .
Normally, shipping sections will not exceed 90 in . (2286 mm)
in width .
Procedures for joining MVS-ND enclosures at shipping splits
During the following steps, please refer to Figure 2 .
Figure 2. Joining the MVS-ND Enclosures.