ADC 150-2202-01, Руководство пользователя

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Appendix A - Technical Reference 150-504-100-03
22 August 1, 2002 HRE-504 List 1, List 1B, and List 2
E
NCLOSURE
I
NFORMATION
Both the HRE-504 List 1 and List 2 units have access to an order wire pair shown in Figure 3 on page 5 and
Figure 1 on page 2 . The enclosure mounting plate allows the unit to be tilted 31° from its vertical position. This
reduces the headroom required in manhole installations from 10 inches (25.4 cm) to less than 3 inches (7.6 cm)
and also reduces the amount of valuable air space required for such underground applications.
Stainless Steel Dome
A stainless steel dome cover fits over the card cage and protects the enclosure from heat and other harmful
environmental effects. The dome seals the inner assembly when clamped to the baseplate, providing a seamless,
corrosion-resistant, easily-removed protective cover.
The stainless steel cover V-retainer, which is equipped with a T-bolt, is used to tighten the dome firmly against
the O-ring on the baseplate. The purpose of the O-ring is to create a pressure-tight seal between the dome and the
baseplate. There is also a locking cover over the T-handle which prevents unauthorized access to the enclosure.
This cover accepts a padlock with a maximum shackle diameter of 0.3-inch (0.76 cm). The V-retainer T-bolt
should be torqued to between 10 and 15 inch-pounds (1.1 and 1.7 Newton/meters) for proper sealing.
Figure 9. HRE-504 List 1 and List 2 Enclosure Dimensions