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UL 2564:2008

UL 2564:2008

$56.55

Low-Voltage Surge Withstand Telecommunications Overcurrent Protector Components

Published By Publication Date Number of Pages
UL 2008-03-06 52
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1.1 Scope

1.1.1 This document applies to cartridge, leaded and surface mount low-voltage, lightning surge withstand overcurrent protectors used in central office, outside plant, remote site and customer premises telecommunications equipment.

1.1.2 These protectors, such as fuses, line feed resistors, electronic current limiters and positive temperature coefficient thermistors, are intended for use in circuits to be electrically connected to a telecommunication network that has an operating voltage to ground of not greater than 150 Vac, and an operating dc voltage to ground of not greater than 200 Vdc (400 Vdc between conductors).

1.1.3 All protectors complying with the requirements of this standard are capable of safely clearing externally sourced faults up to 600 Vrms, with prospective limited duration source currents of up to 60 Arms. Ratings applicable to a specific protector are provided in the applicable Template, see Normative Annex a.

1.1.4 Protectors complying with the requirements of this standard are capable of withstanding common-mode lightning surges as defined in the related tables in this standard without causing permanent opening or shorting of the device and without sustaining damage that will affect compliance with the appropriate end-product requirements. In addition, protectors complying with the requirements of this standard are capable of withstanding higher level lightning surges defined in the end product requirements specified for a particular design template.

1.1.5 This document only covers protectors to be employed with wire line paired cable telecommunications ports (including Ethernet), but does not cover protectors used for other ports, such as coaxial cable telecommunications ports or AC power ports.

1.1.6 A template defines the maximum current-time curve that a given wire size can safely withstand without damage or degradation. (See Table 1) The protector must interrupt, limit or reduce the circuit current before the current value for a given time is exceeded when tested at the rated voltage.

1.1.7 These protectors shall not be employed in other than telecommunications circuits for which they have been specifically designed unless evaluated to another standard. Acceptable applications are summarized in Table 1.

1.1.8 Ambient chemical and environmental contamination conditions (e.g. salt spray, potentially explosive or corrosive gases, excessive mechanical shock and vibration) are beyond the scope of this standard.Table 1 – List of templates

Template Port connection
A Use: GR-1089-CORE – outside line
Maximum Limited Duration Fault Current: 60 A, Voltage Group I, II, or III
Surge Withstand: 100A, 10 /1000 ms; 500A, 2/10 ms
B Use: GR-1089-CORE – outside line connected with 26 AWG or coarser
Maximum Limited Duration Fault Current: 60 A, Voltage Group I, II, or III
Surge Withstand: 100A, 10/1000 ms; 500A, 2/10 ms
C Use: GR-1089-CORE – Intra-building line
Maximum Limited Duration Fault Current: 25A, Voltage Group IV
Surge Withstand: 100A, 2/10 ms and 1500V, 100A, Combination Wave Generator
D Use: GR-1089-CORE – Intra-building line: High current connected to equipment with manufacturer specified AWG direct wiring
Maximum Limited Duration Fault Current: 25A, Voltage Group IV
Surge Withstand: 100A, 2/10 ms and 1500V, 100A, Combination Wave Generator
E Use: UL 60950-1 – outside line, fire enclosure used (100A2-Sec Maximum)
Maximum Limited Duration Fault Current: 40A, Voltage Group I
Surge Withstand: TIA 968 1500V, 37.5A, 10/700
F Use: UL 60950-1 – outside line, fire enclosure used (1.3A)
Maximum Limited Duration Fault Current: 40A, Voltage Group I
Surge Withstand: TIA 968 1500V, 37.5A. 10/700
G Use: UL 60950-1 – outside line, passes all electrical tests (special construction requirements)
  UL 1459 (for use with external secondary protector)
Maximum Limited Duration Fault Current: 40A, Voltage Group I
Surge Withstand: TIA 968 1500V, 37.5A, 10/700
H Use: I-t characteristics in accordance with UL 1459, Fig 59.2
  UL 497A (standard premises wiring systems)
Maximum Limited Duration Fault Current: 40A, Voltage Group I
Surge Withstand: TIA 968 1000V, 100A, 10/1000, 5000V, 500A, 2/10
I Use: UL 1459 (special premises wiring systems) Protect 26 AWG wire
  UL 497A (special premises wiring systems)
Maximum Limited Duration Fault Current: 25A, Voltage Group I
Surge Withstand: TIA 968 1500V, 200A 10/160 1500V, 100A, 10/560

1.1.9 Refer to Informative Annex d for background on system and template designations.

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UL 2564:2008
$56.55