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Jinying Transformer / Markets / Angola

Distribution transformers for Angola

Grid in Angola: 15 / 30 kV HV, 380 V LV, 50 Hz.

  • HV15 / 30 kV
  • LV380 V
  • Frequency50 Hz
  • Conformity scheme— (confirmed per order)
  • RegionAfrica

Matching product lines

Other HV ratings on request

LV to the destination grid on request

Specifying a distribution transformer for Angola

Angola’s public networks run at 50 Hz. The national regulations name 15 kV and 30 kV as the preferred medium-voltage levels for new connections, and 220 V / 380 V on low voltage. The operator’s own transformer specification and the import conformity document still need to be checked with your buyer or customs broker before you order.

Voltages in Angolan regulation

RegulationWhat it says
Presidential Decree 310/10 (Quality of Service Regulation), art. 43Nominal supply voltages: medium voltage 30, 20, 15 and 3 kV; low voltage 220 V and 380 V
IRSEA Instrutivo 2/19, art. 6For medium-voltage connections, 15 kV and 30 kV are the preferred levels
IRSEA Instrutivo 2/19 (definitions)Medium voltage: above 1 kV up to and including 35 kV. Low voltage: up to and including 1 kV
Decree 27/01 (Supply Regulation), art. 5Alternating current at 50 Hz ±2 %; voltage tolerance ±7 % on medium voltage and ±10 % on low voltage

Under the same Decree 27/01 (art. 6), low-voltage installations above 9.9 kVA are supplied three-phase, and medium-voltage connections are always three-phase.

Private transformer posts on medium voltage

IRSEA Instrutivo 1/19 (April 2019) approved a process for connecting new private transformer posts (postos de transformação privativos) on medium voltage: five steps, and 90 days from the date the supply request is submitted, under normal network conditions. ENDE-EP took part in the working group behind it.

Conformity and import documents

The Angolan Institute for Standardisation and Quality (IANORQ) and the accreditation institute (IAAC) were merged into the National Institute of Quality Infrastructure (INIQ) by Presidential Decree 95/21 of 20 April 2021. Its statute lets INIQ verify the conformity of regulated products, whether made in Angola or imported.

Which conformity document an imported distribution transformer needs is set by the list of regulated products in force. Ask your customs broker or INIQ before shipment and put the answer in the order, so that any test report or certificate is planned into the delivery time.

What our published ratings cover

  • Oil-immersed S11 is published for 6, 6.3, 10, 10.5 and 11 kV (30–4500 kVA) and, as a separate 20 kV class, 30–1600 kVA; S13 for 6, 6.3 and 10 kV (30–3150 kVA). Vector groups: S11 (10/11 kV class) Dyn11 / Yyn0 / Yzn11, S13 Dyn11 / Yyn0, tapping ±2 × 2.5 % (S11).
  • 15 kV: dry-type SC(B)11 / SC(B)13 are published for 6–15 kV, 30–2500 kVA. 15 kV oil-immersed and 15 kV compact substations are quoted on request.
  • 30 kV: not among the published nominal levels of any line (the nearest are 33 kV on the YBW compact substation and on the 5000–31500 kVA power transformers). Quoted on request.
  • Low voltage: 380 V and 400 V are both among the published oil-immersed options (380 / 400 / 415 / 433 V). 220 V is quoted on request.
  • Loss values in the published tables are 50 Hz guarantees, the same frequency as the Angolan grid.
  • The vector group, impedance and loss level your operator requires: confirmed against the operator’s specification when you quote.

Send with your enquiry

  • Network operator and site (province, altitude, indoor or outdoor)
  • Rated power (kVA), HV (15 or 30 kV), LV (380 V), vector group, tapping range
  • Type: oil-immersed, dry-type or compact substation
  • Quantity, delivery date and port, and the conformity documents your buyer or customs broker has asked for

Request a quotation for Angola

Send the rated capacity, voltage and quantity — we quote to the grid parameters in Angola.

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