THE EGYPTIAN ELECTRICITY TRANSMISSION COMPANY – DELTA ZONE (TALKHA) – 5.4 MVAR 12 KV CAPACITOR BANKS (2005)

Date of Order: 27-4-2005

Customer: Egyptian Electricity Transmission Company – Delta Zone (Talkha)

Project: QTY 20 Medium Voltage automatic capacitor bank 5.4 MVAR – 11 KV

Nature of Work:
The capacitor bank is required to continue the process of improving the power factor of the unified power system and improve voltage profiles at loads on the substation.

Description:
1st local production in Egypt for medium voltage capacitor banks 5.4 MVAR – 11 KV manufactured by Tepco with technical cooperation with Circutor – Spain delivered to the Egyptian Electricity Transmission Company – Delta Zone (Talkha)

Description of work:
The automatic power factor controller for each transformer outgoing feeder is of two stages switching system. Each capacitor bank consists of 2 groups having rates of 1:2 (1.8 + 3.6) MVAR to achieve 2 switching steps and total bank of 5.4 MVAR.

Content:

The medium voltage capacitor bank is manufactured by TEPCO with technical cooperation with CIRCUTOR – SPAIN. The bank consists of 2 sections:

 1) Outdoor Enclosure:

Equipped with SF6 circuit breaker, contactors and capacitor banks. This enclosure is provided with doors, which give flexibility to inspect and maintain the equipment. The enclosure consists of 3 compartments:

– SF6 circuit breaker compartment equipped with 3 phase SF6 CB 630 A – 12 KV – 500 MVA – 25 KA product of AREVA – FRANCE type FP1225B.

– SF6 contactor compartment equipped with 3 phase SF6 contactor 400 A – 12 KV – 1.8 MVAR and 3 phase SF6 contactor 400 A – 12 KV – 3.6 MVAR product of AREVA – FRANCE type GFA.

– Medium voltage capacitor banks compartment equipped with 18 single phase capacitor 300 KVAR–6350 V – two bushing BIL 38/95 KV, 300 mm creepage distance with internal fuses and discharge reactor 50 V 5 min – stainless steel tank product of CIRCUTOR – SPAIN and 6 inrush current coil 20 micro H – 12 KV product of CIRCUTOR – SPAIN.


2) Indoor Control Box:

The control box is designed to enclose all protection relays, monitoring instruments and controlling of the capacitor banks.