Distribution transformer 1250kva 6.6/0.4kv
Distribution transformer 1250kva 6.6/0.4kv
Model: S11-1250/6.6/0.4KV
Details

Function 

General distribution transformer

Site location

Outdoor, 

Ambient temperature

(Max.) 40℃ (Min.) -40

Temperature rise in windings

60

Top oil temperature rise

55

Cooling 

ONAN

System nominal voltage

6.6KV

System, highest voltage

0.4KV

No. of phases

(3) three off

Quantity 

(1) One off required

Transformer to be built to standards

IEC60076

Rating 

1250KVA

Primary voltage-nominal

6.6KV

Secondary voltage-nominal

0.4KV

Ratio 

6.6/0.4KV

Tappings

±10% in steps of 2.5%

Tap changer

Off load c/w tap changing switch

Vector 

Dyn11

Insulation level 

AC25/AC5

Temperature Classification

A

Power frequency withstand HV

KVrms as per AS2374

LV

KVrms as per AS2374

Short-circuit Impedance 

4.5%

Connection (primary) 

Air cable box-bottom entry

Connection (secondary) 

Air cable box-bottom entry

Cable box requirements

Fully removal, bolted each corner, 

complete with brass gland plates and thermographic window.

Earthing connections

Earth bar suitable for 6×120mm² cable connection,

Earthing connection terminal on the tank. 

No-load Loss

1360W

Coil 

Copper Conductor

Losses 

To suit continuous duty at 80% nominal loading

Testing-routine

To IEC

Input CurrentA

109.4

Output CurrentA

1804

Sound pressure level at 1 meter

65dB(A)

 

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