A family of isolation equipment designed to provide electrical isolation on metallic telecommunications circuits while passing all normal communications signaling. The isolation prevents electrical hazard voltages from damaging the telecommunications network and customers equipment. Hazard voltages includes spikes and surges caused by induction, earth potential rise and lightning.
Suitable for use on
- 2W dialed circuits connected to
phones,
facsimiles,
modems,
computers,
PBX systems,
EFTPOS machines,
Alarm panels.
- Permanently connected circuits used for analogue and data at 300Hz to 100kHz, 128kbit, 2Mbit. 150W and 600W termination.
- Supports smart services. ie number identification etc.
Standard options include
- Single circuit master unit
- 2 circuit master unit. ( Will support 2 slave units)
- Single circuit and 2 circuit slave units. (Powered from a master unit)
- 7 to 12 circuit cabinet suitable for internal and external installations. (Cabinets for external installation will contain a switch board.)
- 13 to 25 circuit cabinets for internal or external installation.
Options and Accessories
- A steel support frame is available for external installations.
- Ring generator for installations with low ringing voltage.
- Line reversal.
- Power Supply. 15kV isolation. 48 VDC, 1.5A output.
Miscellaneous
The single and 2 circuit isolation units are supplied fully assembled with 2 high voltage plugs for terminating the exchange and customers lines in. The Master unit needs to be positioned within 1m of a 230 volt power socket.
The large cabinets are supplied fully wired but without the isolation installed. The isolation is supplied in 6 unit blocks, ready for bolting into the cabinet and connecting. All bolts and plugs are installed.
Cabinets for internal installation are provided with a 230 volt lead, cabinets for external installation are provided with a main switch board ready for termination of a single phase NS cable.
IMPORTANT
For the equipment to provide the required level of isolation it is important that the installation is carefully designed with a full understanding of earth systems and transferred earth potential rise.
KAYROD Services can provide installation specifications and full design consultancy for any installation.
Specifications
Dimensions
Single and 2 circuit units 300H x 150W x 145D
constructed of opaque gray polyester to IP67.
7 to 15 circuit cabinets 1000H x 750W x 300D
constructed of gray Superpolyrel to IP44
16 to 25 circuit cabinets 1000H x 1000W x 300D
constructed of gray Superpolyrel to IP44
Electrical
Nominal isolation rating. 15,000 volts
(Sample tested to 25,000 volts)
Insertion loss. 200Hz to 100kHz. approx. 0.5db
25 Hz approx. 12db
Telephone feed 1-2 cct. units. 24 V DC
large units 24 or 48V DC
DC Backup. Gelcell Battery Typically 48 hours
Power consumption. per circuit.
Off Hook 40mA
Exchange seize/hold current 25mA
Ring Generator (idle) 50mA
Ring Generator
Dimensions 230 x 160 x 90
Input 24 volt DC
Output 25Hz sinusoidal 80v rms. maximum. Ringing cadence and frequency not changed by load. Can supply up to 10 circuits.
(Ring generator required where customer has more than 3 ringing appliances or isolation is being installed beyond 1000W loop).
