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Home > Products > Instrument transformers > ZNOM type voltage transformers

ZNOM type voltage transformers

product
ZNOM type single-phase oil-immersed voltage transformers with natural cooling are measuring transformers designed to generate metering signals for electrical instruments, protection and signalling circuits in AC systems with isolated neutral at 50/60 Hz. Suitable for indoor and outdoor installation in temperate climatic conditions, at altitudes up to 1000 m above sea level. Continuous duty operation. Ambient temperature range: −45 to +40 °C.
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Description

ZNOM type single-phase oil-immersed voltage transformers with natural cooling are measuring transformers designed to generate metering signals for electrical instruments, protection and signalling circuits in AC systems with isolated neutral at 50/60 Hz. Suitable for indoor and outdoor installation in temperate climatic conditions, at altitudes up to 1000 m above sea level. Continuous duty operation. Ambient temperature range: −45 to +40 °C.

Transformer symbols

Z – Grounded (earthed) design
N – Voltage transformer
О – Single-phase
М – Oil-immersed type
Х – Primary winding voltage class, kV.
Х – Climatic category U
Х – Installation category — 1 in accordance with GOST 15150

Characteristic

Main Technical Characteristics (Table 1)
Transformer type
Maximum permissible power, kVA
Accuracy class burden, kVA
0,5
1
3
ZNOM-35-U1
1,0
0,15
0,25
0,6


Main Technical Characteristics (Table 2)
Rated winding voltages, kV
Winding connection diagram and group
Weight, kg
HV
LV main
LV auxiliary  
 Oil weight
Total weight
27,5
0,1
0,127
1/1/1-0-0
20
80
35/√3
0,1/√3
0,1/√3
1/1/1-0-0
20
80

Dimensional drawings

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ZNOM type single-phase oil-immersed voltage transformers with natural cooling are measuring transformers designed to generate metering signals for electrical instruments, protection and signalling circuits in AC systems with isolated neutral at 50/60 Hz. Suitable for indoor and outdoor installation in temperate climatic conditions, at altitudes up to 1000 m above sea level. Continuous duty operation. Ambient temperature range: −45 to +40 °C.
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