Positron Teleline Isolator 751960/05 General Description And Installation Manual
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Positron Teleline Isolator 751960/05 General Description And Installation Manual

Positron Teleline Isolator 751960/05 General Description And Installation Manual

Preconfigured hvi backboard with 5-card teleline isolator shelf
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Teleline Isolator
TM
Model 751960/05 Preconfigured HVI Backboard with
5-card Teleline Isolator Shelf
Description and Installation Guide
925W751039-01E

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Summary of Contents for Positron Teleline Isolator 751960/05

  • Page 1 Teleline Isolator Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf Description and Installation Guide 925W751039-01E...

  • Page 3: Table Of Contents

    Related Documentation........9 Positron Products and Services ....... 9 1.3 Service and Support .
  • Page 4 Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf Cable Routing Station-side Metallic Conduit ..... 26 Crossing Cables and Ground Wires ......26 High Voltage Interface (HVI) Backboard Overview .
  • Page 5 To install the Station circuit cables ......49 3.4 Circuit Testing ..........50 To test CO Side of pairs .

  • Page 7: Chapter 1 - General Information

    Chapter 1 General Information...

  • Page 8: Publication Information

    The information contained in this document is the property of Positron Inc. Except as specifically authorized in writing by Positron Inc., the holder of this document: 1) shall keep all information contained herein confidential and shall protect same in whole or in part from the disclosure and dissemination to all third parties, and 2) shall use same for operating and maintenance purposes only.

  • Page 9: About This Guide

    Ground Potential Rise (GPR). Positron is the leader in isolation technology with its Teleline wireline products and TeleLite optical fiber wireline isolation/protection product families. Positron provides total flexibility in product configuration –...

  • Page 10: Service And Support

    Positron is committed to providing excellent ongoing technical support to its customers. A team of specialists is always available for telephone consultations or for on-site visits to assist in the maintenance and troubleshooting of Positron equipment. For pricing information or assistance in the planning, configuration and implementation of the installation of equipment, contact Technical Customer Service.

  • Page 11: Repair Service

    Service and Support 1.3.4 Repair Service All warranty repairs are performed at no cost. Positron reserves the right to repair or replace any equipment that has been found to be defective. For information about out-of-warranty repairs, contact Positron’s Repair Department. Due to the varied nature of repairs, no specific turnaround can be guaranteed, but average turnaround time is 20 working days from date of receipt.

  • Page 12: Teleline Warranty

    Positron's negligence, breach of warranty, breach of contract or for any other liability in any way connected with or arising out of, the equipment or any services performed by Positron shall be as follows:...

  • Page 13: Cancellation And Rescheduling Charges

    Cancellation and Rescheduling Charges Should the customer cancel, prior to shipment, any part of an order, the customer agrees to pay to Positron cancellation charges, not as a penalty, which shall total all expenses, including labor expenses, incurred by Positron prior to said cancellation.

  • Page 15: Chapter 2 - Overview

    Chapter 2 Overview...

  • Page 16: Introduction

    Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf Introduction The Teleline Preconfigured HVI Backboard with 5-card Isolator Shelf (751960/05) features: Teleline 5-card Shelf, model 751112/15 Lightning Arrestor 751125 5-Pin Protector Block Isolation Jacks Frame ground Circuit ground Ground bar Station cable terminating block 2.1.1 5-card Shelf, model 751112/15...
  • Page 17 Introduction Figure 1: HVI Pre-configured Unit, 751960/05 There can be hazardous voltages on CO dedicated cable, lightning AUTION arrester. Do not touch unless proper precautions are taken including wearing rubber gloves and standing on a rubber mat.

  • Page 18: 300 V Point Illustration

    Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf 300 V Point Illustration For an illustration of how the unit is used as part of the high voltage interface, see the diagram below. Figure 2: HVI Implementation...

  • Page 19: Physical Specifications

    300 V Point Illustration 2.2.1 Physical Specifications Table 1: Physical Specifications Parameter Specification Height 94 cm (37”) Width 74 cm (29.13”) Depth 27.62 cm (10.875") Weight (without plug-in cards)* 22.5 kg (50 lbs) * Add the weight of the individual cards to be installed in the backboard (taken from their individual installation guides) to get the total weight of the backboard.
  • Page 21 Chapter 3 Installation...

  • Page 22: Installation

    Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf Installation The backboard should be located on the grid of the site. This installation location should also be located so as to provide easy access for maintenance. 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.

  • Page 23: Grounding Conductor

    Installation 3.1.2 Grounding Conductor The HVI backboard grounding conductor can not be longer than 2 m (6 feet) from the HVI backboard to a point where this conductor actually enters the earth or an energy dissipating point. 3.1.3 300 Volt Point Location 3.1.3.1 Cable Shields The 300 Volt point for an installation is defined by the electrical parameters of the...

  • Page 24: Protective Grounding - 300 Volt Point

    Cable Pair Protectors These units, if utilized, are provided to protect against conductor to conductor voltage imbalance on the Central Office side of the Positron Equipment. Imbalances may be present as a result of induction effects and or other energy sources during a power system fault.

  • Page 25: High Voltage Side

    Installation 3.1.7 High Voltage Side The High Voltage side, usually the left-hand side, of the HVI backboard contains equipment and wiring that is essentially at remote ground potential. Therefore, if the installation is complete as connection with a feeding cable that originates beyond the substation, it is not at a safe potential to touch, unless using rubber gloves and standing on a rubber safety mat.

  • Page 26: Cable Routing Co-Side Non-Metallic Conduit

    Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf 3.1.9 Cable Routing CO-side Non-metallic Conduit The CO Cable should be routed to the HVI backboard utilizing a nonmetallic conduit as shown in Figure 2 on page 18. This increases the insulation of the cable shield from earth ground contact via the dielectric material of the conduit.

  • Page 27: 5-Card Shelf Ccc

    Installation The installation space must be adequate for the backboard exterior size The CO or Dedicated cable enters at the correct location The power source has been verified to be correct as identified on the drawing and in this document The Substation Ground Grid connection is available and within 2 m (6') of the backboard assembly.

  • Page 28: Power Supply Combinations

    Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf 3.1.15 Power Supply Combinations This shelf can use the following power supply combinations: Table 4: Power supply combinations: Input Voltage Model(s) Output Voltage Supply Current 120Vac or 130 Vdc Single 751313MC or -24 Vdc, 5 A Total Dual 751313MC 120Vac or 130 Vdc...

  • Page 29: Installation Procedures & Sequence

    Installation Procedures & Sequence If the shelf contains two redundant power supplies, one unit would generate an alarm closure to signify loss of output, while the redundant power supply takes over the powering of the shelf. This enables a service call without a service outage.

  • Page 30: Installation Kit Contents

    Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf 3.2.1 Installation Kit Contents Installation Kit Contents Table 6: Quantity Name Part No. (ADC JACK) Auxiliary 241-010303-401 PJ41 shorting plug 230-999000-046 PJ42 reverse polarity plug 230-999000-045 Interconnect Drawing 612W000074-01 3.2.2 Additional Hardware Required The following customer-supplied hardware will be required to install the unit: Table 7:...

  • Page 31: Mounting To The Supporting Structure

    Installation Procedures & Sequence 3.2.3 Mounting to the Supporting Structure The backboard weight is substantial. Mounting should be accomplished AUTION by two or more persons. To mount the backboard 1. Orient the backboard as needed to fit the installation surface on the supporting structure.

  • Page 32: Station-Side Safety Precautions

    Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf 3.2.4 Station-side Safety Precautions When working on the Station side of the interface: Remember that AC and DC power may be present within the AUTION backboard. It is used to power communications equipment. Since this equipment is energized on a full period basis, normal working procedures for powered circuits and devices should be followed when working on these same circuits and devices.

  • Page 33: 120 Vac (Ups Backed-Up) Communication Equipment

    Installation Procedures & Sequence Figure 3: Shelf Power Cable Installation 3.2.6 120 Vac (UPS Backed-Up) Communication Equipment This HVI backboard can be modified to use UPS battery backed-up power for 120 Vac power for communication equipment-only powering. To modify the HVI backboard to permit UPS backed-up power 1.

  • Page 34: Terminated Power Conductors On The Shelf

    Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf 3. Route the additional three conductors from the UPS source through the existing 2 cm (3/4”) conduit into the gang box. The conduit to be used is marked by a nameplate showing 120 Vac and will then contain both RAW and UPS protected 120 Vac power conductors.

  • Page 35: 130 Vdc

    130 V return or plug the cable end into a 120 Vac receptacle on the double duplex outlet. For any powering problems please refer to the documentation provided for the 751112/15 shelf, or the 751318MC and/or the 751313MC power supply documentation. For Positron documentation please refer to the Positron Power Web site: www.PositronPower.com. 3.2.9...

  • Page 36: Central Office Cable

    Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf Figure 4: 5-card Shelf Layout 3.2.10 Central Office Cable The telco's CO cable is to be connected to the isolation jacks as described in “Terminating Dedicated CO Cable Pairs on Isolation Jacks” on page 39, after attachment to the top of the lightning arrestor.

  • Page 37: Cable Color Code Identification

    Installation Procedures & Sequence 3.2.11 Cable Color Code Identification The Positron Teleline Shelf conforms to The North American Communication Cable Color Code. The color-coded cable pairs consist of a Ring conductor and a Tip conductor. The Ring conductor has a negative DC voltage standing on the circuit when in an idle condition.
  • Page 38 Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf Table 11: Color Code for 25-Pair Cable Ring Color Tip Color Cable Pair Blue/White White/Blue Orange/White White/Orange Green/White White/Green Brown/White White/Brown Slate/White White/Slate Blue/Red Red/Blue Orange/Red Red/Orange Green/Red Red/Green Brown/Red Red/Brown Slate/Red Red/Slate...

  • Page 39: Terminating Dedicated Co Cable Pairs On Isolation Jacks

    Installation Procedures & Sequence 3.2.12 Terminating Dedicated CO Cable Pairs on Isolation Jacks The dedicated cable pairs are to be terminated onto screw terminals or wire-wrap isolation jacks. The tip of the jack is the 'Tip' conductor and the shorter or higher pin on the jack is the 'Ring' conductor location.

  • Page 40: Dedicated Co Cable Pairs To Shelf Stub Color Code Assignments

    Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf 3.2.13 Dedicated CO Cable Pairs to Shelf Stub Color Code Assignments The shelf CO Cable Pairs are already connected within the shelf. The connection to the CO Cable must be done inside the backboard utilizing the isolation jacks. See section 3.2.15 on page 41.

  • Page 41: Attachment Sequence: Dedicated Cable Pairs

    Installation Procedures & Sequence 3.2.14 Attachment Sequence: Dedicated Cable Pairs This splicing sequence will then marry sheath cable pairs 1 & 2 through 9 & 10 to slots 1 through 5 for a 4-wire circuit. Table 14: Cable pair assignment for a series of 4-wire circuits CO Side Cable Pair List Shelf Slot Position List 1 &...

  • Page 42: Remote Ground Shelf Pair

    Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf Table 15: Attachment Sequence: 751112/15 Cable Stub to the Isolation Jack Shelf Stub Ring Cable Pair Jack Position Blue White Orange White Green White Brown White Slate White Blue Orange Green Brown Slate...

  • Page 43: Station Side Work Items

    Station Side Work Items: Station Side Work Items: 3.3.1 Ground Wire This backboard must be connected to the substation grid ground. Provisions have been made for connecting the backboard to ground via the provided ground bar located in the lower right hand area of the backboard. See drawing 751960/05. The lightning Arrestor, 751112/15 shelf, and the secondary protector block are connected to this same ground bar.

  • Page 44: To Attach The Lightning Arrestor To The Cable Shield

    Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf To attach the lightning arrestor to the cable shield Please see Figure 5 on page 46. 1. The insulation around the cable sheath should be stripped only in an area of 10 cm (4”) where it is to be clamped to the lightning arrestor.
  • Page 45 Station Side Work Items: 11. Route the other end of the bond strap to the indicated lightning arrestor attach point. See Figure 1 on page 17 for an overview. These actions have now resulted in a connection of the cable shield to the cable side of the lightning arrestor.
  • Page 46 Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf Figure 5: Grounding the Cable Shield...

  • Page 47: Terminated Shelf Pairs On 5-Pin Protector 66 Block

    Station Side Work Items: 3.3.3 Terminated Shelf Pairs on 5-Pin Protector 66 Block The shelf output Station cable pairs have been terminated on the left-hand side of the 5-Pin protector 66 block using a 66 type punch tool. See Figure 1 on page 17 for the location of the 66 Block.
  • Page 48 Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf Table 16: 5-Pin Protector Block Color Code Sequence Station Cable Block Position Ring Pair # Pair # Shelf Slot Position Blue/White White/Blue Orange/White White/Orange Green/White White/Green Brown/White White/Brown Slate/White White/Slate Blue/Red Red/Blue Orange/Red...

  • Page 49: Secondary Protector Modules

    Station Side Work Items: 3.3.4 Secondary Protector Modules The Station cable terminating block is a terminating block for the Teleline module output pairs and the Station service cable pairs. It also acts as a secondary protector block. The protector modules inserted into the 5-Pin receptacle are balanced solid state Positive Temperature Coefficient (PTC) equipped modules.

  • Page 50: Circuit Testing

    Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf Circuit Testing To test CO Side of pairs Fault Exposure Hazard AUTION All work performed after this work sequence requires the use of a rubber mat and rubber safety gloves when working on or touching any cable pair on the CO side of the shelf.

  • Page 51: To Test Substation Side Of Pairs

    Circuit Testing To test substation side of pairs Make sure that the rubber mat is in place and rubber gloves are being AUTION utilized before starting work in this step. This test will confirm the presence of power in the shelf. 1.

  • Page 52: Temperature Considerations

    Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf Temperature Considerations The 5-card Shelf CCC model 751112/15 enclosure is made of an insulating material, which under normal operating conditions (i.e., shelf closed) results in a higher temperature internally than externally (room temperature). Therefore, special care must be taken to ensure that the internal temperature never exceeds the operating temperature of each card.
  • Page 53 Temperature Considerations Table 18: Thermal Specifications Power Operating Temperature Note Model Power Dissipation Consumption Range 7501-16B 8.4 W from -24 Vdc 8.5 W 0° to 50° C 32° to 122°F 7501-16C 6 W from -48 Vdc 0° to 50° C 32°...

  • Page 54: To Calculate The Temperature Inside The Shelf

    Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf To calculate the temperature inside the shelf 1. Photocopy and complete the following worksheet: Table 19: Temperature Calculation Worksheet Slot Power Power Max. Operating Model Consumption Dissipation Temperature -24 Vdc 25% of Total Internal power...

  • Page 55: To Reduce The Temperature Inside The Shelf

    Temperature Considerations 3. Add the power consumption of all cards powered by -48 Vdc. This value represents the “Total Power Consumption” at -48 Vdc. This value is required for the calculation of the power dissipation of the internal power supply. If an external power supply is being used, omit this step.
  • Page 56 Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf Table 20: Temperature Calculation Example Power Max. Operating Slot No. Model Power Consumption Dissipation Temperature 751339SP 10 W at -48 Vdc 65°C (149 °F) 7501-24 65°C (149 °F) 7501-16C 6 W at -48 Vdc 50°C (122 °F 7501-16B...

  • Page 57: Installing Plug-In Circuit Cards

    120 Vac power outlet; this circuit will fail when needed most. One solution is to use the 24 Vdc or 48 Vdc power available from the Positron power supply that powers the shelf. Another solution is to use a 120 Vac UPS system.
  • Page 59 Appendix A Acronyms...

  • Page 60: Acronyms

    Model 751960/05 Preconfigured HVI Backboard with 5-card Teleline Isolator Shelf Acronyms Alternating Current Cable Color Code Central Office Customer Premises Equipment Direct Current Facility-Side Ground Ground Potential Rise High Voltage Interface Manufacture Discontinued NEMA National Electrical Manufacturers Association Private Branch Exchange Power Network Interface Unit Uninterruptable Power Supply...

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