2285d Transformer Test System - Haefely Test AG - #1

TYPE 2285d

Transformer Test System

Mains supply

Reference conditions Ambient temperature Relative humidity Operating conditions Ambient temperature Relative humidity

Further operating conditions according to IEC 359 recommendations, usage class I. This system is designed in accordance to the safety requirements of VDE 0411/part 1a and IEC 348, Safety class I.

3 x 400V

23 ± 5 °C 45..75 %

0 ± 45 °C

20..80 %

Measuring range 1 |iQ...500 Q

Resolution 0.1 |iQ

Limits of error ± 0.06% rdg ± 1 |iQ

plus approx. 0.02% for test point selector

Conditions:

At reference conditions and test current table

The 2285 is a modern computer controlled test system for Transformer Resistance and Ratio measurement with tap changer control. It also supports all measurements, super­visions, calculations and report functions for Heat run test.

The test point selector and the two power supplies enable measurements at various test configurations on transformers with up to 3 winding systems with 3 phases.

Fully automatic measurement of

■ Winding resistance

■ Turns ratio

with system controlled tap changing

Supports heat run test by

■ Cold resistance measurement

■ Temperature measurement and supervision during temperature rise

■ Cooling curve measurement

■ Extrapolation

Up to 18 resistance measurement channels Up to 24 temperature measuring channels

Programmable test procedure for sequential measurement of resistance and ratio including tap changer control, fully automatic, without any human interaction.

Measuring cycle time, selectable Settling time, typically

compliance voltage, twice

Type 2285d/100/3 Power Supplies

5...99 s 10...40 sec max. 60 V

max. 100 A 2 x 3 kW

a brand of

Haefely is a subsidiary of Hubbell Incorporated.