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參數資料
| 型號： | P0900SCRP |
| 英文描述： | SIDAC|98V V(BO) MAX|800MA I(S)|DO-214AA |
| 中文描述： | SIDAC的| 98V V（下公報）最大| 800mA的我（縣）|的DO - 214AA |
| 文件頁數： | 77/161頁 |
| 文件大?。?/td> | 986K |
| 代理商： | P0900SCRP |
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SIDACtor
Data Book
GR 1089-Core
Teccor Electronics
(972) 580-7777
4 - 3
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Overview
In the United States, the telecommunication network is primarily operated by the
Regional Bell Operating Companies (RBOC's) which follow the standards set by
Bellcore or a derivative thereof. GR 1089-Core (often referred to as Bellcore 1089),
“
Electromagnetic Compatibility and Electrical Safety Generic Criteria for Network
Telecommunications Equipment
”
covers the requirements for telecommunications
equipment connected to the outside world through twisted pair, and addresses the
criteria for protection from lightning and AC power cross disturbances.
Because twisted pair can be likened to metallic conductors exposed to lightning and
AC power faults, GR 1089 has documented the standards they feel should be met by
manufacturers of public switched telephone network (PSTN) equipment to ensure safe
and reliable operation.
The criteria used to set these standards is based on transient conditions at exposed
sites such as remote facilities, central offices, and customers
’
premises where
operating companies provide some type of primary voltage protection (typically found
in the form of gas discharge tubes or carbon blocks) which is meant to limit transient
voltages to 1000V
PK
for surge conditions and 600V
RMS
for power cross conditions.
In conjunction with primary voltage protectors, operating companies may also
incorporate fuse links if there is the possibility of exposing the twisted pair to outside
power lines. These fuse links are equivalent to 24 or 26 gauge copper wire and are
coordinated with the current carrying capacity of the voltage protector.
The last element of protection that may be provided by the operating company are
current limiters, which if provided, will be found on the line side of the network
equipment after the primary voltage protection device. These current limiters typically
come in the form of heat coils and have a continuous rating of 350mA.
Requirements
Equipment required to meet GR 1089 must be designed to pass both First and Second
Level Lightning Surge and AC Power Fault Tests, a Current Limiter Test, and a Short
Circuit Test. A minimum of three units will be tested for each of the operating states
that the equipment under test (EUT) may be expected to function; idle, transmit,
receive, on-hook, off-hook, talking, dialing, ringing, and testing. Test connections are
shown in Table 4-1 and connection appearances are shown in Figure 4-1.
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