BMP - Utility Tree Risk Assessment - 40

involved. The following guidelines include examples that may be useful in
determining the consequences of a tree strike:
Severe direct consequences are those that involve major/extensive damage
to transmission and distribution lines and equipment. Examples of severe
direct consequences may include:
* Loss of major supporting structures on transmission lines (e.g., poles
and towers)
* Loss of complex structures on distribution lines (e.g., double
circuits, three-phase, dead ends, and guyed angle)
* Loss of overcurrent protection system equipment (e.g., reclosers,
sectionalizers, switches, and in-line fuses) and other line equipment
(e.g., step-down transformers, three-phase transformer banks, regulators, and capacitor banks)
Significant direct consequences are those that involve damage to transmission and distribution lines and equipment. Examples of significant consequences
include:
* Loss of single-phase tangent structures on distribution lines
* Loss of other structural elements (e.g., crossarms and braces)
* Broken or downed conductors
* Damage to overhead/underground (OH/UG) cable riser poles
* Loss of single-phase line fuses (a.k.a. cut outs) and distribution
transformers
Minor direct consequences are those that involve low-to-moderate damage
to transmission and distribution lines and equipment. Examples of minor
direct consequences include:
* Blown single-phase fuses
* Broken insulators and arresters
* Broken tie wire and floating conductors
Negligible direct consequences are those that may not involve physical
damage to transmission and distribution lines and equipment but require a
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BMP - Utility Tree Risk Assessment

Table of Contents for the Digital Edition of BMP - Utility Tree Risk Assessment

Table of Contents
BMP - Utility Tree Risk Assessment - Cover1
BMP - Utility Tree Risk Assessment - Cover2
BMP - Utility Tree Risk Assessment - i
BMP - Utility Tree Risk Assessment - ii
BMP - Utility Tree Risk Assessment - Table of Contents
BMP - Utility Tree Risk Assessment - iv
BMP - Utility Tree Risk Assessment - v
BMP - Utility Tree Risk Assessment - vi
BMP - Utility Tree Risk Assessment - vii
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BMP - Utility Tree Risk Assessment - Cover4
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