Distribution transformers OLZ-1,25/27,5 (ОЛЗ-1,25/27,5)

Distribution transformers OLZ-1,25/27,5 (ОЛЗ-1,25/27,5)

Distribution transformer OLZDescription

The transformer is intended for powering circuits of automatic block system of the longitudinal electric powering of electrified railways. The transformer may be used for powering circuits of low capacity users of the other industries.
The transformer is an independent delivery unit for devices of outside mounting.
The transformer manufactured in compliance with the standard requirements of GOST 15150 in climatic versions "УХЛ" (moderate cold) and "T" (tropical) location category 1 and is intended for usage under the following operating conditions:

  • ambient air temperature from minus 60° C to plus 40° C and air humidity is 100% at 25 °C for "УХЛ1" version;
  • ambient air temperature from minus 10 °C to plus 55 °C at the air humidity 100% at 35 °C for "T1" version;
  • the transformer does not have integrated protection from resonance and connection over voltages in the circuit;
  • mounting in vertical position.

The transformer does not have build-in protection from resonance oscillations and switching surge of the circuit.

The transformer is patented
Patents for invention No 2087967, 2087968, 2087970, 2107350, 2110862 and 2193252.
Patent certificate on industrial unit No 47969 

Table 1. Technical data

Parameter

Normal value

Voltage class, kV

27

Maximum operating voltage, kV

30

Rated voltage of primary winding,V

27 500

Rated voltage of secondary winding,V, on a tapping

 

х-а1

218

х-а2

224

х-а3

230

х-а4

236

x-a5

242

No-load current, %, not more

35

No-load operation losses, Wt

50

Short circuit voltage, %

4,5±10%

Vector group of transformer

1/1-0

Rated power, VA:

1250

Rated frequency, Hz

50

Tested voltage, kV
one-minute of industrial frequency
of full lighting impulse
of cut lighting impulse


70
170
200

Mass, kg:

90 max

General view of transformer (drawing)