150-454-111-06
Installation
HRE-454
February 25, 2000
19
5
Slide the stainless steel dome over the card cage and position it on the O-ring and baseplate.
6
Lubricate the threads of the cover clamp T-bolt with an antiseize compound.
7
Position the cover clamp around the base of the cover and the baseplate flange. Handtighten the T-bolt
securely, then torque the T-bolt between 10 and 15 inch-pounds.
8
If you are pressurizing the enclosure from a portable pressure bottle, continue from Step 9. If you are
pressurizing the enclosure from the main cable, continue from Step 11. If the enclosure is mounted above
ground and you are not pressurizing the enclosure, continue from Step 13.
9
For the List 2A, List 2B, List 4, and List 6 air-filled stubs, block the cable stub in the splice case by placing
an air dam in the stub according to the normal procedures used to prevent pressure leakage back into the main
cable. Also, make sure that the air cutoff valve is off (fully clockwise).
10
Use a portable pressure bottle and standard tire gauge at the external air stem valve to pressurize the enclosure
to a maximum of 15 PSI (there is no minimum requirement as long as a slight positive pressure is applied).
Replace the air stem cap. Continue from Step 12.
11
Open the air inlet tube by turning the air valve one (1) full turn counterclockwise. Allow the enclosure to
pressurize from the main cable through the enclosure stub.
12
Check the O-ring and enclosure for leaks by painting the enclosure with a pressure-testing solution such as
soap and water. If you detect a leak, tighten the T-bolt and tap lightly around the cover clamp. Repeat as
necessary until the cover is sealed.
13
Secure the HRE-454 with a padlock. This step is not required for manhole-mounted enclosures; however, a
locking assembly is provided.
P
IVOTING
THE
E
NCLOSURE
To pivot the enclosure out from its vertical position:
1
Loosen the four bolts that connect the pivot bracket to the enclosure baseplate.
2
Lift the housing up slightly and pull it out until the top bolts rest against the end of the two pivot bracket slots.
H
I
G
AIN
T
EST
C
ARD
(HTC-400) I
NSTALLATION
Every HRE-454 comes equipped with the HTC-400 test card (
). The test card provides access to all
assigned cable pairs of the HRE-454. The card is used to test cable pairs and to check Central Office (CO) and
field circuits by performing loopback, loop-through, short, and open testing of all cable pairs. A four-position slide
switch on the test card enables technicians to select the type of test to perform. The number of each test point
corresponds to the edge connector pin of the circuit under test (see
for detailed
information). The test card can be inserted into any HRE-454 slot and does not need to be secured by the retaining
bar.
The following features are included on the test card:
•
Switch-selectable loopback, loop-through, short, and open testing of Transmit (XMT) and Receive (RCV)
Tip and Ring pairs on CO and field circuits.
•
Test point access to Tip and Ring XMT and RCV circuits (CO and field), circuit ground, frame ground, and
-48 Vdc power (if available).
A 47k
Ω
resistor connected between the -48 Vdc source and the test point limits current in case
of accidental shorting.
Содержание 150-1122-03
Страница 4: ...Inspecting Shipment 150 454 111 06 iv February 25 2000 HRE 454 ...
Страница 45: ...150 454 111 06 Appendix B Technical Reference HRE 454 February 25 2000 37 Figure 18 HRU 512 Pin Assignments ...
Страница 46: ...Appendix B Technical Reference 150 454 111 06 38 February 25 2000 HRE 454 Figure 19 HRU 612 Pin Assignments ...
Страница 49: ...150 454 111 06 Appendix B Technical Reference HRE 454 February 25 2000 41 Figure 22 HRU 402 Pin Assignments ...
Страница 50: ...Appendix B Technical Reference 150 454 111 06 42 February 25 2000 HRE 454 Figure 23 H2TU R 402 Pin Assignments ...
Страница 51: ...150 454 111 06 Appendix B Technical Reference HRE 454 February 25 2000 43 Figure 24 HRE 454 Wiring Interfaces ...
Страница 74: ...Appendix D Glossary 150 454 111 06 66 February 25 2000 HRE 454 ...
