Technical Information

Technical Information

TAP SWITCH:
This is a mechanism for power transformers for regulation of the input voltage to required levels.(operates off-load). This is normally achieved by changing the ratios of the transformers on the system. This mechanism can either be controlled remotely or via dashboard which is on the tap of the device. Unless specifically requested by the customer, all transformers are manufactured in our factory as a standard 5-stage segment. Level change process:+ / - 5%, + / - 2 x 2.5% or can be produced on customer demand.

 

VECTOR GROUPS:
Vector group Yzn5 or Yzn11 transformers are manufactured in our factory as a standard up to 25-160kVA.
Vector group Dyn5 or Dyn11 transformers are manufactured in our factory as a standard up to 250-5000 kVA.
Other vector groups are available on demand.

 

SHORT-CIRCUIT VOLTAGE (UK)
For the standard transformer productions, 36 / 0,4 kV and 25-630kVA power is 4.5% , from 800 to 2500 kVA power is 6% .
Other short circuit voltages can be produced on demand.

 

FREQUENCY:
Frequency of 50Hz is a standard for transformer production. Different frequency transformers can be produced on demand.

 

OVERVOLTAGE:
Our transformers are designed to operate up to 5% over-voltage.

 

CONDITIONS OF BALANCE LOADING:
We produce standard Yzn and Dyn transformers that star-points can be fully loaded with nominal current.

 

TRANSFORMERS OPERATING HEIGHT:
Operating height is up to 1000 meters above sea level for the standard transformers.
Over 1000meter transformers can be produced on demand.

 

TEMPERATURE RISE:
For Standard production of the transformers

Environmental temperature max : 40 C
Per day : 35 C
Annual avg.  : 20 C
Height      : 1000 m
Transformer oil temperature rise : 60 K
Transformer winding temperature : 65 K                    

Different transformers are designed on demand.