GR 947 CORE : ISSUE 1

Preface
1 Introduction
   1.1 Purpose and Scope
   1.2 Structure and Use of This Document
   1.3 Requirements Terminology
   1.4 Requirement Labeling Conventions
        1.4.1 Numbering of Requirement and Related Objects
        1.4.2 Requirement, Conditional Requirement and
               Objective Object Identification
2 General Information
   2.1 General Design Requirements
        2.1.1 Fail-Safe Design
        2.1.2 Open Architecture and Backward Compatibility
   2.2 Engineering, Installation and Maintenance
        2.2.1 Code Compliance
        2.2.2 Fire Resistance
        2.2.3 Environmental Requirements
        2.2.4 Electromagnetic Interference (EMI)
        2.2.5 Ground System
        2.2.6 Electrostatic Discharge (ESD)
        2.2.7 Electrical Isolation
        2.2.8 Frame Current
        2.2.9 Shipping Temperature and Humidity
        2.2.10 Acoustical Noise
        2.2.11 Safety and Hazards
        2.2.12 Toxic Materials
        2.2.13 Marking of Components
        2.2.14 Sparing
        2.2.15 Nameplate
3 Electrical Requirements
   3.1 AC Input Source
   3.2 AC Ground
   3.3 Inrush Current
   3.4 Power Factor
   3.5 AC Input Protection
   3.6 Low AC Voltage Protection
   3.7 Hold-Up Time
   3.8 Phase Failure
   3.9 Power Interruption
   3.10 Telephone Influence Factor (TIF)
   3.11 Voltage Output
   3.12 Float Voltage Adjustment
   3.13 Voltage Regulation
   3.14 Voltage/Temperature Coefficient
   3.15 Warm-Up Time
   3.16 Voltage Drift
   3.17 Load Sharing
   3.18 Current Limit
   3.19 Current Walk-In
   3.20 Stability
   3.21 Dynamic Response
   3.22 Output Protection and Disconnect
   3.23 Voice Frequency Output Noise
   3.24 Wideband Output Noise
   3.25 Electromagnetic Influence (EMI)
   3.26 Efficiency
   3.27 Soft Start
   3.28 Discharge of Capacitors
   3.29 Rectifier Reliability
   3.30 Induced Frame Current
4 Physical design
   4.1 Enclosure
   4.2 Shock and Vibration
   4.3 Earthquake
   4.4 Paint
   4.5 Cooling
   4.6 Materials
   4.7 Handling
5 Rectifier Interfaces and Alarms
   4.1 Interface Status and Signals
   5.2 Rectifier Interface
        5.2.1 Voltage and Current Levels
        5.2.2 Interconnect Wires and Harness
        5.2.3 Rectifier Interface
        5.2.4 Rectifier-Rectifier Interconnection
        5.2.5 Rectifier-Primary Distribution and Battery
        5.2.6 Rectifier-Digital Monitor/Control Interface
               Interconnections
   5.3 Internal High-Voltage Shutdown
   5.4 Current Limit Adjustment
   5.5 Rectifier Test
   5.6 Output Current Meter
   5.7 Internal Protection
   5.8 Test points
   5.9 PWB Nesting
   5.10 Jacks
6 Components
   6.1 Transformers and Magnetic Coils
   6.2 Hook-Up Wire
   6.3 Power Conductors
   6.4 Electrical and Mechanical Hardware
   6.5 Electrical Power Wire Terminations
   6.6 Resistors
   6.7 Electrolytic Capacitors
   6.8 Capacitors (Except Electrolytic)
   6.9 Semiconductors
   6.10 Circuit Breakers
   6.11 Fuses
   6.12 Meters
   6.13 Relays
   6.14 Switches
   6.15 Printed Wire Boards
7 Quality Assurance, Documentation and Training
   7.1 Hardware Quality Assurance Plan
   7.2 Documentation
   7.3 Training Requirements
8 Performance Verification and Test Procedures
   8.1 General Tests and Inspections for Section 2
        8.1.1 Fire Resistance (Sect 2.2.2)
        8.1.2 Operating Environment (Sect 2.2.3)
        8.1.3 Electrostatic Discharge (Sect 2.2.6)
        8.1.4 Electrical Isolation (Sect 2.2.7)
        8.1.5 Dielectric (Sect 2.2.7)
        8.1.6 Shipping Temperature and Humidity (Sect 2.2.9)
        8.1.7 Acoustical Noise (Sect 2.2.10)
        8.1.8 Safety and Hazards (Sect 2.2.11)
        8.1.9 Toxic Materials (Sect 2.2.12)
        8.1.10 Marking of Components (Sect 2.2.13)
        8.1.11 Nameplate (Sect 2.2.15)
   8.2 Electrical Tests for Section 3
        8.2.1 AC Input Source (Sect 3.1)
        8.2.2 Withstand Surge Capability (Sect 3.1)
        8.2.3 AC Ground (Sect 3.2)
        8.2.4 Inrush Current (Sect 3.3)
        8.2.5 Power Factor (Sect 3.4)
        8.2.6 AC Input Protection (Sec 3.5)
        8.2.7 Low AC Voltage Protection (Sect 3.6)
        8.2.8 Phase Failure (Sect 3.8)
        8.2.9 Power Interruption (Sect 3.8 and 3.9)
        8.2.10 Telephone Influence Factor (TIF) (Sect 3.10)
        8.2.11 Voltage Output (Sect 3.11)
        8.2.12 Float Voltage Adjustment (Sect 3.12)
        8.2.13 Voltage Regulation (Sect 3.13)
        8.2.14 Voltage/Temperature Coefficient (Sect 3.14)
        8.2.15 Warm-Up Time (Sect 3.15)
        8.2.16 Voltage Drift (Sect 3.16)
        8.2.17 Current Limit (Sect 3.18)
        8.2.18 Current Walk-In (Sect 3.19)
        8.2.19 Stability (Sect 3.20)
        8.2.20 Dynamic Response (Sect 3.21)
        8.2.21 Output Protection and Disconnect (Sect 3.22)
        8.2.22 Voice Frequency Output Noise (Sect 3.23)
        8.2.23 Wideband Output Noise (Sect 3.24)
        8.2.24 Electromagnetic Influence (EMI) (Sect 3.25)
        8.2.25 Efficiency (Sect 3.26)
        8.2.26 Soft Start (Sect 3.27)
        8.2.27 Discharge of Output Capacitors (Sect 3.28)
        8.2.28 Life and Reliability (Sect 3.29)
        8.2.29 Induced Frame Current (Sect 3.30)
   8.3 Physical Design Tests and Inspections for Section 4
        8.3.1 Enclosure (Sect 4.1)
        8.3.2 Shock and Vibration (Sect 4.2)
        8.3.3 Earthquake (Sect 4.3)
        8.3.4 Paint (Sect 4.4)
        8.3.5 Cooling (Sect 4.5)
        8.3.6 Materials (Sect 4.6)
        8.3.7 Handling (Sect 4.7)
   8.4 Electrical Tests for Section 5
        8.4.1 Interface Status and Signals (Sect 5.1)
        8.4.2 Internal High-Voltage Shutdown (Sect 5.3)
        8.4.3 Current Limit Adjustment (Sect 5.4)
        8.4.4 Rectifier Test (Sect 5.5)
        8.4.5 Output Current Meter (Sect 5.6)
        8.4.6 Internal Protection (Sect 5.7)
        8.4.7 Test Points (Sect 5.8)
        8.4.8 PWB Nesting (Sect 5.9)
        8.4.9 Jacks (Sect 5.10)
   8.5 Component Tests and Inspections for Section 6
        8.5.1 Transformers and Magnetic Coils (Sect 6.1)
        8.5.2 Power Conductors (Sect 6.3)
        8.5.3 Electrical and Mechanical Hardware (Sect 6.4)
        8.5.4 Electrical Power Wire Termination (Sect 6.5)
        8.5.5 Resistors (Sect 6.6)
        8.5.6 Electrolytic Capacitors (Sect 6.7)
        8.5.7 Capacitors (Except Electrolytic)(Sect 6.80
        8.5.8 Semiconductors (Sect 6.9)
        8.5.9 Circuit Breakers (Sect 6.10)
        8.5.10 Fuses (Sect 6.11)
        8.5.11 Meters (Sect 6.12)
        8.5.12 Relays (Sect 6.13)
        8.5.13 Switches (Sect 6.14)
        8.5.14 Printed Wire Boards (Sect 6.15)
   8.6 Miscellaneous Tests and Inspections for Section 7
        8.6.1 Documents (Sect 7.2)
Glossary
References
List of Tables
2-1 Test Voltages for Electrical Isolation
3-1 Voltage Limits
3-2 Desired Rectifier Efficiency
5-1 Interface Connection Functions
6-1 Maximum Allowable Temperature
6-2 Maximum Permissible Current
6-3 Maximum Operating Voltage and Temperature
6-4 Suggested Torques, Clamping Load and Electrical Current Rating
6-5 Semiconductor Torque Limits
6-6 Allowable Temperatures for Switches and Contacts
8-1 Test Equipment
8-2 1960 Single Frequency TIF Weighing Values

Describes requirements for a -48-volt telecommunications switchmode rectifier rated from 15 - 20 amps, which, in Bellcore's view meets the telecommunications power-system requirements for a typical Bellcore Client company (BCC). Suitable for indoor stationary mounting or confined locations (with limited floor space or fixed enclosures), which may or may not be attended, and with entrances requiring a ladder.