Rural Electrification Corporation Limited

Construction Standards

REC has developed the following construction standards for Rural Electrification works:

11 KV Lines

A-1

Protective Guarding Across the Road

A-2

Conductor Formation and Clearances (Lines without Earthwire)

A-3

Conductor Formation and Clearances (Lines with Earthwire)

A-4

Supports (Lines without Earthwire)

A-5

Supports (Lines with Earthwire)

A-6

‘V’ Cross Arm (MS Channel)

A-7

Pole Top Bracket

A-8

Maximum Permissible Spans on Straight Runs (R-1984)

A-9

ACSR Conductors – Voltage Regulation Table (R-1993)

A-10

Arrangement of Conductors at Angle Locations

A-11

Tapping Arrangement – Single Pole tapping

A-12

Tapping Arrangement – Double Pole Structure

A-13

‘V’ Cross Arm (MS Angle)

A-14

Automatic Voltage Booster Installation on 11 KV Line

A-15

Installation of 11 KV Auto-Reclosers on Double Pole Structure

A-16

Conductor formation and clearances of 11 KV 3-phase line in 3-Phase/single phase composite system (Phase-to-Neutral)

A-17

Configuration of Single-Phase line (Phase-to-Neutral) with 8M Poles

A-18

Configuration of Single-Phase line (Phase-to-Neutral) with 7M Poles

A-19

Single Phase tapping (Phase-to-Neutral) from three-phase line

A-20

Single Phase tapping from single-phase line (Phase-to-Neutral)

A-21

Arrangement at tension locations

A-22

11 KV Line – Type of PCC Poles for Angle and dead end locations

A-23

Conductor formation and arrangement of guys for 0^o to 10^o angle locations

A-24

Conductor formation and arrangement of guys for 10^o to 60^o angle locations (Single Pole Support)

A-25

Conductor formation and arrangement of guys for 10^o to 60^o angle locations (Double Pole Support)

A-26

Conductor formation and arrangement of guys for 60^o to 90^o angle locations (Four Pole Support)

A-27

Conductor formation and arrangement of guys for Dead End Locations (Double Pole Support)

A-28

Configuration of Single-Phase line (Phase-to-Phase) with 7.5M Poles

A-29

Single-Phase Tapping (Phase-to-Phase) from Three-Phase Lines (R&B Phases)

A-30

Single-Phase Tapping (Phase-to-Phase) from Three-Phase Lines (Y&R or Y&B Phases)

A-31

Single-Phase Tapping from single-phase lines (Phase-to-Phase)

A-32

Single-Phase, ACSR (Phase-to-Phase system) Voltage Regulation Table

A-33

Single-Phase, ACSR (Phase-to-Neutral system) Voltage Regulation Table

A-34

Maximum Permissible Spans on straight runs with All Aluminium Alloy Conductor (Revised Sizes)

A-35

AAA Conductors Voltage Regulation Table

A-36

FRP Top Hamper for 11 KV Overhead Lines with Polymeric Ferrule

415/240 Volt Lines

B-1

Protective Guarding Across the Road – Horizontal Formation

B-2

Protective Guarding Across the Road – Vertical Formation

B-3

Conductor formation and Clearances – Horizontal Formation

B-4

Conductor formation and Clearances – Vertical Formation

B-5

Supports – Horizontal Formation

B-6

Supports – Vertical Formation

B-7

Pole Top Bracket

B-8

Maximum Permissible Spans for 3-Phase LT Lines (R-1984)

B-9

AAC & ACSR Conductors – Voltage Regulation Table (R-1993)

B-10

Arrangement of Conductor at Angle Locations for Cross Country lines – Horizontal Formation

B-11

Maximum Permissible Spans for LT Single Phase Lines (R-1984)

B-12

Conductor formation and Clearances, 3-Phase, 4-Wire – Horizontal Formation

B-13

Conductor formation and Clearances, 3-Phase, 4-Wire – Vertical Formation

B-14

Conductor formation and Clearances, Single-Phase, 3-Wire – Horizontal Formation

B-15

Conductor formation and Clearances Single-Phase, 3-Wire – Vertical Formation

B-16

PVC Spacer

B-17

Earth Knob for LT Lines

B-18

Composite Spacer for LT Lines

B-19

Type of PCC Poles for Angle & Dead End Locations

B-20

Conductor formation and arrangement of guys for 0^o to 10^o angle location (3-Phase, 4-Wire Horizontal Formation)

B-21

Conductor formation and arrangement of guys for 10^o to 30^o angle location (3-Phase, 4-Wire Horizontal Formation)

B-22

Conductor formation and arrangement of guys for 30^o to 60^o angle location (3-Phase, 4-Wire Horizontal Formation)

B-23

Conductor formation and arrangement of guys for 60^o to 90^o angle location (3-Phase, 4-Wire Horizontal Formation)

B-24

Conductor formation and arrangement of guys for Dead-End locations (3-Phase, 4-Wire Horizontal Formation)

B-25

Conductor formation and arrangement of guys for 0^o to 10^o angle location (3-Phase, 5-Wire Horizontal Formation)

B-26

Conductor formation and arrangement of guys for 10^o to 30^o angle location (3-Phase, 5-Wire Horizontal Formation)

B-27

Conductor formation and arrangement of guys for 30^o to 60^o angle location (3-Phase, 5-Wire Horizontal Formation)

B-28

Conductor formation and arrangement of guys for 60^o to 90^o angle locations (3-Phase, 5-Wire Horizontal Formation)

B-29

Conductor formation and arrangement of guys for Dead End Locations (3-Phase, 5-Wire Horizontal Formation)

B-30

Conductor formation and arrangement of guys for angle and Dead End Locations (3-Phase, 5-Wire Vertical Formation)

B-31

Conductor formation and arrangement of guys for Angle and Dead End Locations (3-Phase, 4-Wire Vertical Formation)

B-32

Details of Street Light Fittings (Incandescent Lamp) for narrow street

B-33

Details of Street Light Fittings (Incandescent Lamp) for normal street

B-34

Details of reflector discs for street light fittings (Incandescent lamp)

B-35

Details of Street Light Fittings (Fluorescent tube)

B-36

415V Lines, 3-Phase, Maximum Permissible Spans on straight runs with All Aluminium Alloy Conductors (AAAC - revised sizes)

B-37

240V Lines, 1-Phase, Maximum Permissible Spans on straight runs with All Aluminium Alloy Conductors (AAAC - revised sizes)

B-38

AAA Conductors – Voltage Regulation Table

11KV Insulators and Fittings

C-1

Insulator Pin

C-2

Strain Insulator Set – Tongue & Clevis type

C-3

Holding of Conductor on 11 KV Pin Insulator – Straight Run (using Helically formed fitting)

C-4

Holding of Conductor on 11 KV Pin Insulator – Angle Location (using Helically formed fitting)

C-5

11 KV Conductor Dead End Arrangement (using Helically formed fitting)

415/240 Volt Insulator and Fittings

D-1

Pin Insulator

D-2

Forged Insulator Pin

D-3

Shackle Insulators

D-4

Hardware for Type-2 Shackle Insulator

D-5

Hardware for Type-1 Shackle Insulator

D-6

LT Conductor Straight Run and Dead End Arrangement (using Helically formed fittings)

Conductor and Accessories

E-1

Wind Pressure & Temperature Data for Sag Tension Charts

E-2

Sag Tension Chart – AAC 7/2.21 mm (Nominal Aluminium Area –25mm² )50 Kg/m² Wind Zone

E-3

Sag Tension Chart – AAC 7/2.21 mm (Nominal Aluminium Area –25mm² )75 Kg/m² Wind Zone

E-4

Sag Tension Chart – AAC 7/2.21 mm (Nominal Aluminium Area –25mm² )100 Kg/m² Wind Zone

E-5

Sag Tension Chart – AAC 7/3.10 mm (Nominal Aluminium Area –50mm² )50 Kg/m² Wind Zone

E-6

Sag Tension Chart – AAC 7/3.10 mm (Nominal Aluminium Area –50mm² )75 Kg/m² Wind Zone

E-7

Sag Tension Chart – AAC 7/3.10 mm (Nominal Aluminium Area –50mm² )100 Kg/m² Wind Zone

E-8

Sag Tension Chart – ACSR 7/2.11mm (Nominal Aluminium Area –20mm² )50 Kg/m² Wind Zone

E-9

Sag Tension Chart – ACSR 7/2.11mm (Nominal Aluminium Area –20mm² )75 Kg/m² Wind Zone

E-10

Sag Tension Chart – ACSR 7/2.11mm (Nominal Aluminium Area –20mm² )100 Kg/m² Wind Zone

E-11

Sag Tension Chart – ACSR 7/2.59mm (Nominal Aluminium Area –30mm² )50 Kg/m² Wind Zone

E-12

Sag Tension Chart – ACSR 7/2.59mm (Nominal Aluminium Area –30mm² )75 Kg/m² Wind Zone

E-13

Sag Tension Chart – ACSR 7/2.59mm (Nominal Aluminium Area –30mm² )100 Kg/m² Wind Zone

E-14

Sag Tension Chart – ACSR 7/3.35mm (Nominal Aluminium Area –50mm² )50 Kg/m² Wind Zone

E-15

Sag Tension Chart – ACSR 7/3.35mm (Nominal Aluminium Area –50mm² )75 Kg/m² Wind Zone

E-16

Sag Tension Chart – ACSR 7/3.35mm (Nominal Aluminium Area –50mm² )100 Kg/m² Wind Zone

E-17(PT-I)

Sag Chart - ACSR 7/4.09mm (Nominal Aluminium Area –80mm² )50 Kg/m² Wind Zone

E-17(PT-II)

Tension Chart - ACSR 7/4.09mm (Nominal Aluminium Area –80mm² )50 Kg/m² Wind Zone

E-18(PT-I)

Sag Chart - ACSR 7/4.09mm (Nominal Aluminium Area –80mm² )75 Kg/m² Wind Zone

E-18(PT-II)

Tension Chart - ACSR 7/4.09mm (Nominal Aluminium Area –80mm² )75 Kg/m² Wind Zone

E-19(PT-I)

Sag Chart - ACSR 7/4.09mm (Nominal Aluminium Area –80mm² )100 Kg/m² Wind Zone

E-19(PT-II)

Tension Chart - ACSR 7/4.09mm (Nominal Aluminium Area –80mm² )100 Kg/m² Wind Zone

E-20(PT-I)

Sag Chart - ACSR Conductor 6/4.72mm (Al.)+7/1.57mm (St.) (Nominal Aluminium Area –100mm² )50 Kg/m² Wind Zone

E-20(PT-II)

Tension Chart – ACSR Conductor 6/4.72mm (Al.)+7/1.57mm (St.) (Nominal Aluminium Area –100mm² )50 Kg/m² Wind Zone

E-21(PT-I)

Sag Chart - ACSR Conductor 6/4.72mm (Al.)+7/1.57mm (St.) (Nominal Aluminium Area –100mm² )75 Kg/m² Wind Zone

E-21(PT-II)

Tension Chart – ACSR Conductor 6/4.72mm (Al.)+7/1.57mm (St.) (Nominal Aluminium Area –100mm² )75 Kg/m² Wind Zone

E-22(PT-I)

Sag Chart - ACSR Conductor 6/4.72mm (Al.)+7/1.57mm (St.) (Nominal Aluminium Area –100mm² )100 Kg/m² Wind Zone

E-22(PT-II)

Tension Chart – ACSR Conductor 6/4.72mm (Al.)+7/1.57mm (St.) (Nominal Aluminium Area –100mm² )100Kg/m² Wind Zone

E-23

Sags for Stringing

E-24

Return – Wave Method for Checking Sag

E-25

Wind Load on Conductors in Different Wind Regions

E-26

LT & 11KV Lines Crimped Tension Joints for AAC/ASCR

E-27