This Specification specifies the design contents for the instrument system lightning protection engineering, including design method, lightning protection level, lightning protection for field instrumentation in explosive environment, equipotential bonding and earthing system, selection of surge protective device, laying and shielding of cables, and lightning protection for field-bus system.
This Specification is applicable to the lightning protection engineering design for the instrument and automatic control system in the flammable and explosive environment or non-flammable and non-explosive environment of constructed, renovated and extended projects in petrochemical industry.
This Specification is not applicable to the lightning protection for the industrial television monitoring system and fire alarm system in the petrochemical enterprises.
Foreword i
1 Scope
2 Terms and Definitions
2.1 Integrated Lightning Protection Engineering
2.2 Lightning Electromagnetic Induction
2.3 Equipotential Bonding System
2.4 Surge Protective Device
3 Lightning Protection Level
3.1 Lightning Active Area
3.2 Lightning Protection Level
3.3 Important Grade Class of System
4 Lightning Protection Design for Control Room Structure
4.1 Direct Lightning Flash Protection Design for Control Room Structure
4.2 Correlative Design in Control Room
5 Lightning Protection Engineering Method for Instrumentation System
5.1 Design Principle
5.2 Integrated Lightning Protection
5.3 Lightning Protection Basic Method for Instrumentation System
5.4 Equipotential Bonding and Earthing
6 Design for Equipotential Bonding and Earthing System
6.1 Structure of Earthing System
6.2 Specification for Design of Earthing System
6.3 Design of Equipotential Bonding System
6.4 Earthing Mode for Instrumentation Power Distributing
6.5 Bonding for Surge Protective Device in Control Room
6.6 Bonding Conductor and Wire
6.7 Earthing Sign
7 Lightning Protection for Instrumentation System in Control Room
7.1 Shielding for Instrumentation System in Control Room
7.2 Cabinet Earthing
7.3 Entry Method of Cables to Control Room
7.4 Surge Protective Device in Control Room
7.5 Bounding of Non Intrinsic Safety System
7.6 Bounding of Intrinsic Safety System
7.7 Wires in Bonding and Earthing System
8 Surge Protective Device Setup
8.1 General
8.2 Surge Protective Device Usage Principle
8.3 Type of Surge Protective Devices
8.4 Parameters of Surge Protective Device of Signal Loop
8.5 Surge Protective Device for Field Instrumentation
8.6 Surge Protection in AC Power Line
8.7 Surge Protective Device for Communication Device
9 Lightning Protection for Field Instrumentation
9.1 Protection for Field Instrumentation
9.2 Field Instrumentation Earthing
9.3 Surge Protective Device Mode
10 Lightning Protection for Intrinsic Safety System
10.1 Surge Protective Device for Intrinsic Safety System
10.2 Surge Protective Device Setup in Intrinsic Safety System
10.3 Bounding In Intrinsic Safety System
11 Laying and Shielding of Cables
11.1 Laying of Cable
11.2 Shielding of Cables
11.3 Earthing of Cable Shielding
11.4 Spare Cable and Spare Core of Cable
11.5 Signal Cable Form
11.6 Other Notes for Laying of Cables
12 Lightning Protection for Field-Bus System
12.1 Lightning Protection for Field-Bus System
12.2 Protection for Field-Bus System in Explosive Area
12.3 Surge Protective Device for Field-Bus System
12.4 Signal Cable for Field-Bus System
Bibliography
Explanation of Wording in This Specification
