Aclara SGM1430-B, Руководство пользователя

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S G M 1 4 3 0 - B S m a r t M e t e r P o l y p h a s e U s e r M a n u a l – S M E T S 2
9
Chapter 3 • Physical Components
CHAPTER
3
P
HYSICAL
C
OMPONENTS
The SGM1430-B smart meter family comprises of a number of polyphase variants
with and without 2 A aux relay outputs. The main physical features of a
SGM1430-B meter are shown below.
Enclosure and Covers
The SGM1430-B meters use a thermally stable, UV-protected polycarbonate
enclosure that is double insulated to protective Class II. The enclosure provides an
Ingress Protection Rating of IP54 in accordance with IEC 60529. The following
cover segments are constructed of Polycarbonate 10% GF (Grade Lexan 503RS):
• Meter cover - When the meter is fully installed, the main cover cannot be
removed while the terminal cover is fitted to the meter.
• Terminal cover - Protects the terminal screwsfrom external contact. Inside
the terminal cover is a diagram identifying the connections on the terminal
block. This includes a schematic diagram and description of all physical
elements on the terminal block, the arrangement of active and neutral
terminals for the conductors, and an identifying number defining the specific
variant of terminal.
Cover Seals
The meter cover and terminal cover are secured by standard single sealing screws.
The torque value for the sealing screw is 0.6-0.9 Nm. The screw head has a
recessed hole and slot to accommodate a 0.914 mm diameter thread wire seal. The