POSITRON
Power Division
5101 Buchan Street
, Ste 220
Montreal, Quebec
H4P 2R9 Canada


Tel.: 1-888-577-5254
Fax: 514-345-2271

Email: customerservice@positronpower.com
www.positronpower.com




POSITRON TELELINE ISOLATOR
High Voltage Interface (HVI)
Model 751960/03 v 2.1
Five Card Shelf Back Board Unit
Hardware Description and Installation

This HVI Back Board design complies with I.E.E.E. Standard 487-2000 and other
Industry standards. Compliance with this design will insure a safe working
environment for all personnel, while protecting the telecommunications network
from hazardous voltages and currents.
If there are any questions regarding this design, I can be reached on 505-298-
5400.

Richard Knight
National Manager
EF & I














HVI Back Board Model 751960/03 V2.1


Page 2
Table of Contents of Backboard Items:

Item
Description
Page
#

Installation Overview:................................................................................................................................... 4
1. Hvi Placement:.................................................................................................................................... 5
2. 300 Volt Point Location ....................................................................................................................... 6
3. HVI Equipment Layout - Concept:....................................................................................................... 6
4. High Voltage Side: .............................................................................................................................. 7
5. Low Voltage Side: ............................................................................................................................... 7
6. Cable Routing Co Side Non Metallic Conduit:..................................................................................... 7
7. Cable Routing Station Side Metallic Conduit:...................................................................................... 7
8. Crossing Cables And Ground Wires: .................................................................................................. 8
Safety Issues: .............................................................................................................................................. 8
High Voltage Interface Backboard Overview: .............................................................................................. 8
Positron Warranty:....................................................................................................................................... 9
9. Additional Hardware Required: ......................................................................................................... 10
10.
Unpacking:.................................................................................................................................... 10
11.
Mounting To The Supporting Structure:........................................................................................ 10
12.
Wiring: .......................................................................................................................................... 10
13.
120 VAC Wiring: ........................................................................................................................... 10
14.
130 VDC:...................................................................................................................................... 11
15.
Terminated Power Conductors On The Shelf: .............................................................................. 11
16.
Power Supply Card:...................................................................................................................... 12
17.
Central Office Cable: .................................................................................................................... 13
18.
Cable Color Code Identification: ................................................................................................... 13
18.
Cable Color Code Identification: (Continued) ............................................................................... 14
19.
Terminated Cable Pairs On Isolation Jacks.................................................................................. 15
20.
C.O. Cable Pairs Color Code Assignments: ................................................................................. 16
21.
Terminated Shelf Stub Cable Pairs On Isolation Jacks: ............................................................... 17
22.
Station Cable / Shelf Slot Pairs List: ............................................................................................. 17
23.
Ground Wire: ................................................................................................................................ 18
24.
Secondary Protector Modules: ..................................................................................................... 18
25.
Teleline #751126 Lightning Arrester:............................................................................................ 18
26.
Attaching The Lightning Arrester To The Cable Shield:................................................................ 19
27.
Terminated Shelf Pairs On 5 Pin Protector Block: ........................................................................ 20
28.
Station Circuit Cables: .................................................................................................................. 20
29.
Fault Exposure Hazard:................................................................................................................ 21
30.
Test C.O. Side Of Pairs With Test Card: ...................................................................................... 21
31.
Test Substation Side Of Pairs With Test Card For Power: ........................................................... 21
32.
Test Substation Side Of Pairs With Test Card:............................................................................. 21
33.
Plug In Circuit Cards:.................................................................................................................... 21
34.
Turn Up Circuits:........................................................................................................................... 21
35.
Test Circuit: .................................................................................................................................. 21
36.
Sealing Current:............................................................................................................................ 22
37.
Pots Card Limitations:................................................................................................................... 22
38.
Circuit Wiring: ............................................................................................................................... 22 HVI Back Board Model 751960/03 V2.1


Page 3
39.
Network Channel Terminating Equipment (Ncte) Equipment:....................................................... 22
40.
Circuit Modules Environmental Considerations: ........................................................................... 22
41.
Backboard Equipment List:........................................................................................................... 22
42.
Drawings Provided:....................................................................................................................... 22
HVI Back Board Model 751960/03 V2.1


Page 4
Installation Overview:
This document provides the information needed to install a High Voltage Interface (HVI)
Back Board at a High Voltage Interface location. The design presented and the
installation steps are provided to protect personnel and equipment from this harsh
environment. Any deviation from this design or installation event sequence may put
personnel at serious risk of injury or death and/or equipment at serious risk of damage.
This interface is a grouping of protective equipment at a site where High Voltage may be
impressed on a telephone type circuit. This might equate to a power substation or a 911
communication center.
The HVI should be located on the grid of the site. This installation location should also
be located so as to provide easy access for maintenance. This document should be
read in its entirety and the associated drawings studied so that you are familiar with the
work to be performed prior to actually starting work. This step will make the project
much easier and more error free.
The equipment utilized in this manual is designed to isolate energies, that is, it does not
shunt or route damaging energy to a grounding field. This is because the grounding
field itself is the source of the problems in most cases. Therefore, keep in mind the
object is to isolate differing potentials from each other.
That means keep the C.O. side of the cable pairs separate from the Station side cable
pairs at a distance of at least 4 1/2.
Sections 3 through 8 are an overview of the High Voltage Interface. Section 9 and on
are detailed instructions for installation of equipment and wiring of the cables and
equipment that make up the HVI. HVI Back Board Model 751960/03 V2.1


Page 5
1. Hvi
Placement:
Items to consider during Placement selection:
The location selected for the HVI MUST take into account several items.
1. Room for the HVI and related equipment.
2. Locat