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Broadband Isolation Transformer

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Broadband Isolation Transformer
telby BBU 6 - 6kV Isolation Transformer, High Voltage Interface (HVI) - Designed for Voice and Data Transmission
telby BBU 6 - 6kV Isolation Transformer, High Voltage Interface (HVI) - Designed for Voice and Data Transmission Image

Standard range

The range of our standard transformers conforms to practically the entire spectrum of requirements needing to be met by wired communication systems where sub-elements of a complex system are to be coupled with zero reflection. Available as serial products they are designed for use as either matching or isolating transformers and, depending on the particular model, can be used to create phantom circuits.

Customized

specifications

Where special technical requirements are not covered by our range of

 

standard transformers we well be glad to develop transformers based on the customer’s specifications.

System Description

Telbit has been providing high voltage isolation products to protect telecommunications circuits entering substations, power generating plants, cell site communications facilities and PCS sites for over 35 years. With its telby Isolation Transformer product line, Telbit offers a complete line of copper based high voltage isolation solutions for 10kV (200Hz…3500kHz – 150Ohm), 15kV (200Hz…3500kHz – 150Ohm) and 20kV (200Hz…12MHz – 150Ohm) isolation protection.

The telby Isolation Transformer is a proven 2-wire passive wire line isolation system, standalone units for high voltage isolation application where equipment and personnel safety are of primary consideration.

The Telbit isolator product line can accommodate virtually every type of communication circuit. The Telbit Isolation Transformer has no moving parts, and does not require cumbersome remote powering arrangements. Its reliability in maintaining communications is unmatched, meeting all the requirements of IEEE 487. Telbit’s passive Isolation Transformer system offers safe, long-term, maintenance-free operation.

telby TST 15kV - POTS Voice and Data Isolation Transformer HVI for GPR protection of Analog PSTN line with DSL
telby TST 15kV - POTS Voice and Data Isolation Transformer HVI for GPR protection of Analog PSTN line with DSL Image

The telby TST 15kV provides excellent high voltage protection on communication lines used by analog telephones or PBX, using impulse or DTMF dial modes in combination with DSL service on the same line.
(If only ISDN, DSL or Voice frequency data transmission is required, regular telby Isolation Transformers are sufficient.)
The image on the left shows the telby TST 15kV – POTS Voice and Data Isolation Transformer and the location of the wire connections for the secondary side (primary side located on opposite side)
In order to provide the required DC Signal on the secondary side, a 43-57VDC power supply with max. 210 mA has to be connected, see schematics below.
The wiring diagrams are also providing you with possible applications for the telby TST 15kV.

telby NFLU 32 - 6kV Isolation Transformer High Voltage Interface (HVI) - Designed for Voice and Data Transmission
telby NFLU 32 - 6kV Isolation Transformer High Voltage Interface (HVI) - Designed for Voice and Data Transmission Image

The range of our standard transformers conforms to practically the entire spectrum of requirements needing to be met by wired communication systems where sub-elements of a complex system are to be coupled with zero reflection. Available as serial products they are designed for use as either matching or isolating transformers and, depending on the particular model, can be used to create phantom circuits.

telby 20kV Universal Broadband Isolation Transformer
telby 20kV Universal Broadband Isolation Transformer Image

Telbit has developed a selection of Universal Broadband Isolation Transformers capable to protect a range of bandwidths suitable for for Voice and Data Transmission from POTS to DSL technologies including ADSL, HDSL, and VDSL including VDSL2 from 200 Hz up to30 MHz with up to 280 Mbit/s.

The Universal Broadband Isolation Transformer is designed to isolate the incoming telecommunication line from the customer equipment located in a high-voltage environment (HVE). This method provides a physical barrier between the customer equipment and the incoming line, resulting in a fundamental isolation protection (HVI) within hazardous areas (ZOI), such as power generators, substations, heavy power users, lightning prone areas or where soil conditions provide unsuitable earthing conditions leading to Earth Potential Rise (EPR) / Ground Potential Rise (GPR).

This condition is known to lead to damage not only to customer equipment connected to the incoming copper pair, but also to the Telco providers’ exchange equipment. Possible damage to the copper in the ground and other circuits within the cable bundle is also prone to damage in extreme situations. Any of the above situations can lead to expensive repairs, and time-consuming downtime for all involved.

The telby Universal Broadband Isolation Transformers are fully passive component and do not require any sort of power supply, resulting in an unmatched reliability.

The Line Isolation Transformer is to be placed immediately inside the facility at the first telephone equipment panel. Refer to local codes for enclosure requirements.

For 4-wire connections, two Transformers are required.

 

Span power option: If necessary, an optional secondary 60 mA DC power feed module for up to 120 VDC can be built-in. This can provide power to the Station side span for span powered Network Communication Telephone Equipment (NCTE). A local power source external to the standalone unit is required for this span power feature.

Warning: Never install telephone equipment in a wet location or during a lightning storm. When installing or modifying telephone lines, disconnect lines at the network interface before working with uninsulated lines or terminals.

 

SPECIFICATION / TECHNICAL DATA

ISOLATION SPECIFICATION
Longitudinal Surge (1.2/50µs) 100kVAC r.m.s.
Lightning Surge (8/20µs) 100kVAC r.m.s.
Continuous Rating (50Hz, 60sec) 20kVAC r.m.s.

 

Dielectric Strength
The combined dielectric strength of various dielectric components that make up the insulation of the telby Universal 20kV – Broadband Isolation Transformer is called Basic Impulse Insulation Level or Basic Insulation Level (BIL). This value, usually in kV, indicates the equipment’s ability to withstand overvoltage caused by lightning and switching surges. The BIL voltage is the voltage that the equipment will withstand for the given length of time and the given number of applications without the insulation failing (ie. without an occurrence of flashovers). It is expressed as an impulse peak voltage with a standard wave lasting not longer than 1.2µ rise time and 50µ fall time.

 

Insulation Breakdown
Earth Potential Rise (EPR) or Ground Potential Rise (GPR) is a safety issue in the coordination of power and telecommunications services. An EPR/GPR event at a site such as an electrical distribution substation may expose personnel, users or structures to hazardous voltages. Any conducting object connected to the substation earth ground, such systems as telephone wires may be energized at the ground potential in the substation. This transferred potential is a hazard to people and equipment connected to these wires.

Insulation Transformers used as a High Voltage Interfaces (HVI) must withstand the applied alternating 50/60Hz voltage. The tests performed with alternating voltage are more realistic than the tests performed with D.C. voltage.

A.C. testing is required for testing of the assembled electrical equipment. The A.C. tests performed on assembled electrical equipment are usually “go/no go” types of tests. If the leakage current indicator does not light up, the equipment passed the test. However, these tests are not a guarantee of future performance, nor any indication of how long the equipment may last in case of Earth Potential Rise (EPR) or Ground Potential Rise (GPR) condition.

 

TECHNICAL SPECIFICATIONS

Physical Characteristics
HEIGHT 164 mm 6.45”
WIDTH 138 mm 5.43”
DEPTH 94 mm 3.70”

 

Technical Data
SIGNAL SOURCE AND TERMINATION IMPEDANCES 150 : 150 Ohm / 600 : 600 Ohm
RATIO 1 : 1
FREQUENCY 0.2 – 30000 kHz
ERROR ATTENUATION > 20 dB
OPERATING ATTENUATION < 1.0 dB
SYMETRY > 52 dB @ 552 kHz
DATA TRANSFER up to 280 MBit/s
INSULATION TEST VOLTAGE 20 kVAC r.m.s. / 60 sec.
Optional Span Power Option (Telbit patented) 0-120 VDC / 60mA max.
TEMPERATURE RANGE -40 to + 100° C (-40 to 212” F)
HUMIDITY RANGE 0 to 99% Relative Humidity

 

Telbit AG certifies that the product listed above complies with the following Rules and Regulations:
– Federal Communications Commission’s (“FCC”) Rules and Regulations 47 CFR Part 68 and FCC part 15, subpart B
– Administrative Council on Terminal Attachments (“ACTA”)-adopted technical criteria ANSI/TIA-968-B-3 (November 2016) Telecommunications – Telephone Terminal Equipment – Technical Requirements for Connection of Terminal Equipment to the Telephone Network.
– ANSI/IEEE Standard 487-2015 Standard for the Electrical Protection of Communications Facilities Serving Electric Supply Locations.
– ETSI ES 203 021-2 – Access and Terminals (AT) Harmonized basic attachment requirements for Terminals for connection to analogue interfaces of the Telephone Networks; Update of the technical contents of TBR 021, EN 301 437, TBR 015, TBR 017; Part 2: Basic transmission and protection of the network from harm
– ANSI T1.601 American National Standard for Telecommunications – ISDN Basic Access Interface for Use on Metallic Loops for Application on the Network Side of the NT
– ANSI T1.413-1998, Telecommunications – Interface between Networks and Customer Installation – Asymmetric Digital Subscriber Line (ADSL) Metallic Interface
– ANSI T1.418-2000, Technical Requirements for SHDSL Terminal Equipment to Prevent Harm to the Telephone Network
– ANSI Standard T1.417-2001, Spectrum Management for Loop Transmission Systems

telby 15kV Universal Broadband Isolation Transformer
telby 15kV Universal Broadband Isolation Transformer Image

Universal 15kV Broadband Isolation Transformer, up to 12Mbit/s Designed for Voice and Data Transmission NF / ISDN / XDSL

The new Telbit Universal 15kV Broadband Isolation Transformer is designed for Voice and Data Transmission from 200 Hz up to 5 MHz. If necessary, a secondary DC power feed can be taped off. This latest Insulation Transformer can be used for regular carrier frequency, ISDN and XDSL. For 4-wire connections, two Transformers or the 4-wire model is required!

telby 10kV Universal Broadband Isolation Transformer
telby 10kV Universal Broadband Isolation Transformer Image

Universal 10kV Broadband Isolation Transformer, up to 10Mbit/s Designed for Voice and Data Transmission NF / ISDN / XDSL

The new Telbit Universal 10kV Broadband Isolation Transformer is designed for Voice and Data Transmission from 200 Hz up to 3.5 MHz. If necessary, a secondary DC power feed can be taped off. This latest Insulation Transformer can be used for regular carrier frequency, ISDN and XDSL. For 4-wire connections, two Transformers or the 4-wire model is required!

telby PCM-FLU 20kV Isolation Transformer
telby PCM-FLU 20kV Isolation Transformer Image

High Voltage Interface (HVI) – Designed for Voice and Data Transmission

The telby Isolation Transformer is a proven 2-wire passive wire line isolation system, standalone units for high voltage isolation application where equipment and personnel safety are of primary consideration.

The Telbit isolator product line can accommodate virtually every type of communication circuit. The Telbit Isolation Transformer has no moving parts, and does not require cumbersome remote powering arrangements. Its reliability in maintaining communications is unmatched, meeting all the requirements of IEEE 487. Telbit’s passive Isolation Transformer system offers safe, long-term, maintenance-free operation.

Applications

Applications from 2 Wire Analog Phone to High Speed Digital Circuit

Any Location Where Critical (Must not Fail) Communications are the Priority

Locations Served by Copper Telco Facilities where a GPR of 1000 Volts or more are present

Wireless Facilities located on or Around High Voltage Utility Transmission Towers

Any Telco Facilities Located in High Voltage Environments

Wireless Metering Services with Entering Data Lines

Solar Generating Facilities with Entering Data/Voice Lines

Point-to-Point (building to building) Wire-Line Communication Applications

telby PCM-FLU 15kV Isolation Transformer
telby PCM-FLU 15kV Isolation Transformer Image

High Voltage Interface (HVI) – Designed for Voice and Data Transmission

The telby Isolation Transformer is a proven 2-wire passive wire line isolation system, standalone units for high voltage isolation application where equipment and personnel safety are of primary consideration.

The Telbit isolator product line can accommodate virtually every type of communication circuit. The Telbit Isolation Transformer has no moving parts, and does not require cumbersome remote powering arrangements. Its reliability in maintaining communications is unmatched, meeting all the requirements of IEEE 487. Telbit’s passive Isolation Transformer system offers safe, long-term, maintenance-free operation.

Applications

Applications from 2 Wire Analog Phone to High Speed Digital Circuit

Any Location Where Critical (Must not Fail) Communications are the Priority

Locations Served by Copper Telco Facilities where a GPR of 1000 Volts or more are present

Wireless Facilities located on or Around High Voltage Utility Transmission Towers

Any Telco Facilities Located in High Voltage Environments

Wireless Metering Services with Entering Data Lines

Solar Generating Facilities with Entering Data/Voice Lines

Point-to-Point (building to building) Wire-Line Communication Applications

telby PCM-FLU 10kV Isolation Transformer
telby PCM-FLU 10kV Isolation Transformer Image

High Voltage Interface (HVI) – Designed for Voice and Data Transmission

The telby Isolation Transformer is a proven 2-wire passive wire line isolation system, standalone units for high voltage isolation application where equipment and personnel safety are of primary consideration.

The Telbit isolator product line can accommodate virtually every type of communication circuit. The Telbit Isolation Transformer has no moving parts, and does not require cumbersome remote powering arrangements. Its reliability in maintaining communications is unmatched, meeting all the requirements of IEEE 487. Telbit’s passive Isolation Transformer system offers safe, long-term, maintenance-free operation.

Applications

Applications from 2 Wire Analog Phone to High Speed Digital Circuit

Any Location Where Critical (Must not Fail) Communications are the Priority

Locations Served by Copper Telco Facilities where a GPR of 1000 Volts or more are present

Wireless Facilities located on or Around High Voltage Utility Transmission Towers

Any Telco Facilities Located in High Voltage Environments

Wireless Metering Services with Entering Data Lines

Solar Generating Facilities with Entering Data/Voice Lines

Point-to-Point (building to building) Wire-Line Communication Applications

 

 

telby PCM-FLU 6kV Isolation Transformer
telby PCM-FLU 6kV Isolation Transformer Image

High Voltage Interface (HVI) – Designed for Voice and Data Transmission

The telby Isolation Transformer is a proven 2-wire passive wire line isolation system, standalone units for high voltage isolation application where equipment and personnel safety are of primary consideration.

 

The Telbit isolator product line can accommodate virtually every type of communication circuit. The Telbit Isolation Transformer has no moving parts, and does not require cumbersome remote powering arrangements. Its reliability in maintaining communications is unmatched, meeting all the requirements of IEEE 487. Telbit’s passive Isolation Transformer system offers safe, long-term, maintenance-free operation.

Applications

Applications from 2 Wire Analog Phone to High Speed Digital Circuit

Any Location Where Critical (Must not Fail) Communications are the Priority

Locations Served by Copper Telco Facilities where a GPR of 1000 Volts or more are present

Wireless Facilities located on or Around High Voltage Utility Transmission Towers

Any Telco Facilities Located in High Voltage Environments

Wireless Metering Services with Entering Data Lines

Solar Generating Facilities with Entering Data/Voice Lines

Point-to-Point (building to building) Wire-Line Communication Applications

BBU 20 - 20kV Isolation Transformer, High Voltage Interface (HVI) - Designed for Voice and Data Transmission
BBU 20 - 20kV Isolation Transformer, High Voltage Interface (HVI) - Designed for Voice and Data Transmission Image

Galvanic Isolating Transformer BBUE 20

Standard range

The range of our standard transformers conforms to practically the entire spectrum of requirements needing to be met by wired communication systems where sub-elements of a complex system are to be coupled with zero reflection. Available as serial products they are designed for use as either matching or isolating transformers and, depending on the particular model, can be used to create phantom circuits.

Customized specifications

Where special technical requirements are not covered by our range of standard transformers we will be glad to develop transformers based on the customer’s specifications.

System Description

Telbit has been providing high voltage isolation products to protect telecommunications circuits entering substations, power generating plants, cell site communications facilities and PCS sites for over 35 years. With its telby Isolation Transformer product line, Telbit offers a complete line of copper based high voltage isolation solutions for 10kV (200Hz…3500kHz – 150Ohm), 15kV (200Hz…3500kHz – 150Ohm) and 20kV (200Hz…12MHz – 150Ohm) isolation protection.

The telby Isolation Transformer is a proven 2-wire passive wire line isolation system, standalone units for high voltage isolation application where equipment and personnel safety are of primary consideration.

The Telbit isolator product line can accommodate virtually every type of communication circuit. The Telbit Isolation Transformer has no moving parts, and does not require cumbersome remote powering arrangements. Its reliability in maintaining communications is unmatched, meeting all the requirements of IEEE 487. Telbit’s passive Isolation Transformer system offers safe, long-term, maintenance-free operation.

BBU 10 - 10kV Isolation Transformer, High Voltage Interface (HVI) - Designed for Voice and Data Transmission
BBU 10 - 10kV Isolation Transformer, High Voltage Interface (HVI) - Designed for Voice and Data Transmission Image

Galvanic Isolating Transformer BBUE 10

Standard range

The range of our standard transformers conforms to pratically the entire spectrum of requirements needing to be met by wired communication systems where sub-elements of a complex system are to be coupled with zero reflection. Available as serial products they are designed for use as either matching or isolating transformers and, depending on the particular model, can be used to create phantom circuits.

System Description

Telbit has been providing high voltage isolation products to protect telecommunications circuits entering substations, power generating plants, cell site communications facilities and PCS sites for over 35 years. With its telby Isolation Transformer product line, Telbit offers a complete line of copper based high voltage isolation solutions for 10kV (200Hz…3500kHz – 150Ohm), 15kV (200Hz…3500kHz – 150Ohm) and 20kV (200Hz…12MHz – 150Ohm) isolation protection.

The telby Isolation Transformer is a proven 2-wire passive wire line isolation system, standalone units for high voltage isolation application where equipment and personnel safety are of primary consideration.

The Telbit isolator product line can accommodate virtually every type of communication circuit. The Telbit Isolation Transformer has no moving parts, and does not require cumbersome remote powering arrangements. Its reliability in maintaining communications is unmatched, meeting all the requirements of IEEE 487. Telbit’s passive Isolation Transformer system offers safe, long-term, maintenance-free operation.

telby TST 4kV - POTS Voice and Data Isolation Transformer HVI for GPR protection of Analog PSTN line with DSL
telby TST 4kV - POTS Voice and Data Isolation Transformer HVI for GPR protection of Analog PSTN line with DSL Image

The telby TST 4kV provides excellent high voltage protection on communication lines used by analog telephones or PBX, using impulse or DTMF dial modes in combination with DSL service on the same line.
(If only ISDN, DSL or Voice frequency data transmission is required, regular telby Isolation Transformers are sufficient.)
The image on the left shows the telby TST 4kV – POTS Voice and Data Isolation Transformer and the location of the wire connections for the secondary side (primary side located on opposite side)
In order to provide the required DC Signal on the secondary side, a 43-57VDC power supply with max. 210 mA has to be connected, see schematics below.
The wiring diagrams are also providing you with possible applications for the telby TST 4kV.

Broadband Isolation Transformer
telby BBU 6 - 6kV Isolation Transformer, High Voltage Interface (HVI) - Designed for Voice and Data Transmission Image
telby BBU 6 - 6kV Isolation Transformer, High Voltage Interface (HVI) - Designed for Voice and Data Transmission
Standard range The range of our standard transformers conforms to practically the entire spectrum of requirements needing to be met by wired communication systems where sub-elements of a complex system are to be coupled with zero ... Read More
telby TST 15kV - POTS Voice and Data Isolation Transformer HVI for GPR protection of Analog PSTN line with DSL Image
telby TST 15kV - POTS Voice and Data Isolation Transformer HVI for GPR protection of Analog PSTN line with DSL
The telby TST 15kV provides excellent high voltage protection on communication lines used by analog telephones or PBX, using impulse or DTMF dial modes in combination with DSL service on the same line. (If only ISDN, DSL or Voice f... Read More
telby NFLU 32 - 6kV Isolation Transformer High Voltage Interface (HVI) - Designed for Voice and Data Transmission Image
telby NFLU 32 - 6kV Isolation Transformer High Voltage Interface (HVI) - Designed for Voice and Data Transmission
The range of our standard transformers conforms to practically the entire spectrum of requirements needing to be met by wired communication systems where sub-elements of a complex system are to be coupled with zero reflection. Available ... Read More
telby 20kV Universal Broadband Isolation Transformer Image
telby 20kV Universal Broadband Isolation Transformer
Telbit has developed a selection of Universal Broadband Isolation Transformers capable to protect a range of bandwidths suitable for for Voice and Data Transmission from POTS to DSL technologies including ADSL, H... Read More
telby 15kV Universal Broadband Isolation Transformer Image
telby 15kV Universal Broadband Isolation Transformer
Universal 15kV Broadband Isolation Transformer, up to 12Mbit/s Designed for Voice and Data Transmission NF / ISDN / XDSL The new Telbit Universal 15kV Broadband Isolation Transformer is designed for Voice and Data Transmission fro... Read More
telby 10kV Universal Broadband Isolation Transformer Image
telby 10kV Universal Broadband Isolation Transformer
Universal 10kV Broadband Isolation Transformer, up to 10Mbit/s Designed for Voice and Data Transmission NF / ISDN / XDSL The new Telbit Universal 10kV Broadband Isolation Transformer is designed for Voice and Data Transmission fro... Read More
telby PCM-FLU 20kV Isolation Transformer Image
telby PCM-FLU 20kV Isolation Transformer
High Voltage Interface (HVI) – Designed for Voice and Data Transmission The telby Isolation Transformer is a proven 2-wire passive wire line isolation system, standalone units for high voltage isolation application where equ... Read More
telby PCM-FLU 15kV Isolation Transformer Image
telby PCM-FLU 15kV Isolation Transformer
High Voltage Interface (HVI) – Designed for Voice and Data Transmission The telby Isolation Transformer is a proven 2-wire passive wire line isolation system, standalone units for high voltage isolation application where equ... Read More
telby PCM-FLU 10kV Isolation Transformer Image
telby PCM-FLU 10kV Isolation Transformer
High Voltage Interface (HVI) – Designed for Voice and Data Transmission The telby Isolation Transformer is a proven 2-wire passive wire line isolation system, standalone units for high voltage isolation application where equ... Read More
telby PCM-FLU 6kV Isolation Transformer Image
telby PCM-FLU 6kV Isolation Transformer
High Voltage Interface (HVI) – Designed for Voice and Data Transmission The telby Isolation Transformer is a proven 2-wire passive wire line isolation system, standalone units for high voltage isolation application where equ... Read More
BBU 20 - 20kV Isolation Transformer, High Voltage Interface (HVI) - Designed for Voice and Data Transmission Image
BBU 20 - 20kV Isolation Transformer, High Voltage Interface (HVI) - Designed for Voice and Data Transmission
Galvanic Isolating Transformer BBUE 20 Standard range The range of our standard transformers conforms to practically the entire spectrum of requirements needing to be met by wired communication systems where sub-elements of... Read More
BBU 10 - 10kV Isolation Transformer, High Voltage Interface (HVI) - Designed for Voice and Data Transmission Image
BBU 10 - 10kV Isolation Transformer, High Voltage Interface (HVI) - Designed for Voice and Data Transmission
Galvanic Isolating Transformer BBUE 10 Standard range The range of our standard transformers conforms to pratically the entire spectrum of requirements needing to be met by wired communication systems where sub-elements of ... Read More
telby TST 4kV - POTS Voice and Data Isolation Transformer HVI for GPR protection of Analog PSTN line with DSL Image
telby TST 4kV - POTS Voice and Data Isolation Transformer HVI for GPR protection of Analog PSTN line with DSL
The telby TST 4kV provides excellent high voltage protection on communication lines used by analog telephones or PBX, using impulse or DTMF dial modes in combination with DSL service on the same line. (If only ISDN, DSL or Voice fr... Read More