TTD SERIES

POLYLUX’S TTD SERIES

Three Phase Isolation Step-Down Transformers

The TTD series is made up of three-phase isolation step-down transformers with different voltages, ratings and protection degrees designed to work continuously and at maximum performance 365 days a year. Thus, ensuring the supply to the installations or equipment they feed.

This series is composed of step-down transformers with 400V input and 230V output and ratings as from 0.63kVA up to 1000kVA.

We can find different versions depending on their degree of protection:

  • TTDX: IP00
  • TTDW: IP23
  • TTDZ: IP54/65

Some of its utilities:

  • The main use of TTD transformers is circuit maintenance, reducing the voltage as from 400V up to 230V.
  • Change the neutral regime of an installation.
  • They help to improve the quality of the signal feeding the loads in installations with a certain level of electrical noise.

Constructive features:

  • All the transformers are dipped in anti-flash varnish and then compacted in the oven. This process increases the insulation grade, reduces noise and provides anti-moisture, waterproofed protection.
  • All the connection terminals are made of copper. For transformers with aluminium coils, internal bimetallic AL-CU connections are made by welding with filling and sealing material to ensure a safe, long-lasting connection.
  • The high-power transformers are manufactured with format cores and low losses properties, thus contributing to improving performance.

TTDX
Three-phase dry type step-down transformers finished in anti-flash varnished for maximum protection, insulation, noise and vibration reduction.
Rating
From 0,63 kVA to 1000 kVA
Input voltage
400 V
Output voltage
230 V
Protection degree
IP-00

Frequency
50/60 Hz
Connection group
Yyn0
Cooling
AN
Ambient temperature
45 ºC
Temperature rise
From Class F – 155ºC to Class H – 180ºC
Insulation
Class H – 180ºC
Windings
Class HC – 200 ºC
Efficiency (%)
From 88,7 to 99
Noise level (dB)
From < 45 to < 65
Test voltage
3 kV (1 min, 50 Hz)
Standards
From IEC/EN/UNE-EN 61558, CE to IEC/EN/UNE-EN 60076, CE
TTDW
Three-phase dry type step-down isolation transformers finished in anti-flash varnished in IP23 metal enclosure with protection to prevent direct contact with electrical parts.
Rating
From 0,63 kVA to 1000 kVA
Input voltage
400 V
Output voltage
230 V
Protection degree
IP-23 / IK-08

Frequency
50/60 Hz
Connection group
Yyn0
Cover
Metal enclosure RAL 7035 (cat. C3 ISO 12994-2)
Cooling
From ANAN to ANAF
Ambient temperature
45 ºC
Temperature rise
From Class F – 155ºC to Class H – 180ºC
Insulation
Class H – 180ºC
Windings
Class HC – 200 ºC
Efficiency (%)
From 88,7 to 99
Noise level (dB)
From < 45 to < 65
Test voltage
3 kV (1 min, 50 Hz)
Standards
From IEC/EN/UNE-EN 61558, CE to IEC/EN/UNE-EN 60076, CE
TTDZ
Three-phase dry type step-down transformers finished in anti-flash varnished in IP54/65 metal enclosure with protection for outdoor installation.
Rating
From 0,63 kVA to 1000 kVA
Input voltage
400 V
Output voltage
230 V
Protection degree
From IP-65 / IK-10 to IP-54 / IK-10

Frequency
50/60 Hz
Connection group
Yyn0
Cover
Metal enclosure RAL 7035 (cat. C4 ISO 12994-2)
Cooling
From ANAN to ANAF
Ambient temperature
45 ºC
Temperature rise
From Class F – 155ºC to Class H – 180ºC
Insulation
Class H – 180ºC
Windings
Class HC – 200 ºC
Efficiency (%)
From 91,3 to 99
Noise level (dB)
From < 45 to < 65
Test voltage
3 kV (1 min, 50 Hz)
Standards
From IEC/EN/UNE-EN 61558, CE to IEC/EN/UNE-EN 60076, CE
Includes
Silent blocks

Special Manufacturing

We build transformers and inductive elements tailored to your needs.

Tell us about your needs and our engineers will create a solution adapted to your company.