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ZTY series high precision auto voltage regulator power supply mainly consists of contact auto-transformer, servo motor and automatic control circuit. When grid voltage is unstable or load varies, automatic control circuit drives the servo motor in compliance with variety of output voltage, adjusts carbon brush position on the contact auto-transformer, makes output voltage adjusted to be rated value and reaches a steady state. ZTY series products introduce advanced technology, adopt energy-saving ring transformer and use integrated circuit and high quality components, which make them featured with small footprint, light weight, high-efficiency and energy-saving, no additional distortion of output waveform, stable performance and reliability.

Features
Specifications
MODEL ZTY Single Phase
Capacity 1 KVA 2 KVA 3 KVA 5 KVA 10 KVA 15 KVA 20 KVA 30 KVA
AC INPUT
Voltage range 160 V ~ 255 V
Frequency range 50 / 60 Hz
Phase Single phase + N + G
AC OUTPUT
Voltage 220 V / 230V ( 110 V output is available for 5KVA below)
Voltage regulation accuracy ≤ ± 3%
Waveform Sinusoidal
Efficiency ≥ 96%
Power factor 0.8
Distortion No additional waveform distortion
Response time ± 10% varies < 1 s
Overvoltage protection Output phase voltage 250 V ± 5 V
Undervoltage Output phase voltage 183 V ± 5 V
Other protections Start-up delay – mechanical failure – overcurrent – short-circuit – overtemperature
Insulation resistance ≥ 2MΩ
Dielectric intensity Input and output to earth at 50 Hz, 2000 V AC voltage for 1min, there is no breakdown or flashover, leakage current is less than 10 mA or at 2800 V DC voltage for 1min, no breakdown or flashover, leakage current is less than 1 mA
OTHERS
Ambient temperature 0℃ ~ + 40℃
Altitude Less than 1000 m
Relative humidity 0% ~ 95% (non-condensing)
Dimensions (W*D*H) (mm) 176*190*146 265*240*205 325*240*275 412*244*372 400*345*665 400*345*770 440*385*810
Weight (kg) 5.0 8.5 12.5 15 24 43 55 91
MODEL ZTY Three Phase
Capacity 10 KVA 15 KVA 20 KVA 30 KVA
AC INPUT
Voltage range 277 V ~ 433 V
Frequency range 50 / 60 Hz
Phase Three phase + N + G
AC OUTPUT
Voltage 380 V / 400V
Voltage regulation accuracy ≤ ± 3%
Waveform Sinusoidal
Efficiency ≥ 96%
Power factor 0.8
Distortion No additional waveform distortion
Response time ± 10% varies < 1 s
Overvoltage protection Output phase voltage 433 V ± 5 V
Undervoltage Output phase voltage 316 V ± 5 V
Other protections Start-up delay – mechanical failure – overcurrent – short-circuit – phase order (three phase) – lack-phase (three phase) – overtemperature
Insulation resistance ≥ 2MΩ
Dielectric intensity Input and output to earth at 50 Hz, 2000 V AC voltage for 1min, there is no breakdown or flashover, leakage current is less than 10 mA or at 2800 V DC voltage for 1min, no breakdown or flashover, leakage current is less than 1 mA
OTHERS
Ambient temperature 0℃ ~ + 40℃
Altitude Less than 1000 m
Relative humidity 0% ~ 95% (non-condensing)
Dimensions (W*D*H) (mm) 350*320*775 400*345*815 435*465*900
Weight (kg) 35 45 59 78