IEEE DRAFT 741 : D1 2006
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
CRITERIA FOR THE PROTECTION OF CLASS 1E POWER SYSTEMS AND EQUIPMENT IN NUCLEAR POWER GENERATING STATIONS
10-18-2023
01-12-2013
1 Scope
2 Normative references
3 Definitions
4 General design criteria
5 Principal design criteria and requirements
5.1 AC power distribution systems
5.2 DC power system
5.3 Instrumentation and control power system
5.4 Primary containment electrical penetration assemblies
5.5 Valve actuator motors (direct gear driven)
6 Testing and surveillance
6.1 Device testing
6.2 Preoperational tests
6.3 Surveillance
Annex A (informative) Illustration of concepts associated with
degraded voltage protection
A.1 Purpose
A.2 Discussion
A.3 Degraded voltage relay voltage settings
A.4 Degraded voltage relay time delay settings
A.5 Loss of voltage relay settings
A.6 High voltage conditions
A.7 Off-Site system voltage considerations
A.8 Tolerances
A.9 Bibliography
Annex B (informative) Guidelines for selection of overload
protection for valve actuator motor circuits
B.1 Purpose
B.2 Definitions
B.3 Discussion
B.4 Overload protection devices
B.5 Typical procedures for selection of TORs
B.6 Bibliography
Annex C (informative) Auxiliary system automatic bus transfer -
protection concerns
C.1 Purpose
C.2 Discussion
C.3 Bus transfer analysis
C.4 Bus transfer protection issues
C.5 Implementation of a bus transfer scheme using dynamic
modeling
C.6 Bibliography
Annex D (informative) Use of high-speed magnetic circuit
breakers for special applications
D.1 Purpose
D.2 Discussion
Annex E (informative) Bibliography
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