An enterprise of
Bangladesh Steel & Engineering Corporation

ISO 9001-2008 Certified



North Patenga, Chittagong-4204, Bangladesh.
Telephone: 88-031-2501160; 88-031-2501161
Fax: 88-031-2501162 E-mail: gemcobd@yahoo.com

Lightning Arrester

1

 Application

 Distribution transformer/Line/Cable Protection of heavy duty class.

2

 Type of Arrester

 Metal Oxide (ZnO) Gapless

3

 Construction

 Single unit, basically consisting of gapless hermetically sealed in with non-linear characteristics with high energy capacity, all enclosed in porcelain housing.

4

 Installation

 Outdoor cross arm angle/channel/structure mounted.

5

 Mounting

 Pole Mounted steel bracket

6

 Nominal system Voltage

 11KV

7

 Maximum system Voltage

 12KV

8

 System frequency

 50Hz

9

 Number of Phase

 3

10

 Rated Arrester Voltage

 10.5KV (rms)

11

 Maximum Continuous Operating Voltage

 8.4KV (rms)

12

 Rated Arrester Current

 5KA

13

 Power frequency withstand voltage of Lightning Arrester Housing, Dry & Wet

 35KV (Dry) & 30KV (Wet)

14

 Impulse withstand voltage of Lightning Arrester Housing

 75 KV (Peak)

15

 Lightning Impulse Residual Voltage (8/20 micro-second wave)

 35KV (Peak)

16

 Steep Current Impulse Residual Voltage at 10KA of 1 micro-second front time

 40KV (Peak)

17

 High Current Impulse Withstand Value (4/10 micro-second)

 65KA

18

 Cree page distance (minimum)

 25mm/KV

19

 Standard

 Performance, Design & Testing are in accordance  to IEC-99-4.

Features and Accessories:

  • The Arrester is ZnO type, basically consisting of gap-less hermetically sealed in with nonlinear volt-ampere characteristic with high-energy capacity. ZnO Arrester has excellent thermal stability for high-energy surges, external pollution & temporary over voltage.
  • The Line lead and earthing terminal with clamps are provided suitable to accommodate AAC/ACSR/Copper Conductor of diameter from 10mm to 15mm.
  • All ferrous parts are Cadmium plated/hot dip galvanized. The Arrester will be suitable for mounting vertically. The housing are of high quality, porcelain containers of heavy construction sealed against the entry of moisture and Oxygen and free from influence of moisture and weather condition.
  • Mounting steel bracket and fixing bolts, nut, washer etc are provided with the Arrester for steel cross arm. The mounting steel bracket and necessary fittings will be hot dip galvanized as per BS - 729.