Getra Geräte- und Trafobau - Qualität seit 1968

Isolating and Safety Isolating Transformers

Technical description:

Isolating transformers are used for the electrical isolation of circuits in order to reduce the dangers resulting from accidentally touching earthed and live parts simultaneously. Isolating transformers can be used to satisfy the protective measure "protective separation". The connected equipment is safely isolated from the power supply network and must not be earthed. Isolating transformers are subject to DIN/VDE 0570/2-4/IEC61558/2-4 Part 1. The following max. nominal values apply:

Input voltage: 1000 V
Frequency: 500 Hz
Output voltage: 1000 V (no-load and load)
Power:
- Single-phase transformers: 25 kVA
- Three-phase transformers: 40 kVA

Isolating transformers must be marked with the symbol to distinguish them from transformers for other applications.

Safety isolating transformers are intended to feed distribution circuits, devices or other equipment with voltages up to 50 VAC or 120 VDC via rectifier (no-load and load) in order to prevent dangerous contact voltages in case of faults. Safety isolating transformers satisfy the protective measure "safety extra-low voltage" and are used where the usual protective measures such as TN system, etc. are inadequate. Safety isolating transformers are subject to DIN/VDE 0551, Part 1. The following max. nominal values apply:

Input voltage: 1100 V
Frequency: 500 Hz
Output voltage: 50 V (no-load and load)
Power:
- Single-phase transformers: 10 kVA
- Three-phase transformers: 16 kVA

Safety isolating transformers must be marked with the symbol to distinguish them from transformers for other applications.

Single-Phase Isolating Transformers GMTE 3,15 - 8kVA

Single-Phase Isolating Transformers to VDE 0570/2-15/IEC61558/2-15
Protective winding between primary and secondary winding.
Secondary with symmetrical connection for monitoring insulation.

Power range 3.15 – 8 kVA
With ± 5% taps for matching to mains voltage
Frequency 50/60 Hz
Output 230 V (with centre tap)
Circuit li0
Impedance voltage 3%
No-load current I_o < 3% of the rated current
Inrush current surge max. 12 x I_N
Insulation class ta=40°C/B
Thermostatic switch for acoustic or visual signal in case of impermissible heating
Class of protection I
Type of protection IP00
(Suitable for installation up to IP23)

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Three-Phase Isolating Transformers GMTD 3,15 - 8kVA

Three-Phase Isolating Transformers to VDE 0570/2-15/IEC61558/2-15
Protective winding between primary and secondary winding.
Secondary with symmetrical connection for monitoring insulation.

Power range 3.15 – 8 kVA
Mains voltage 3 x 400 V
With ± 5% taps for matching to mains voltage
Netzspannungsanpassung
Frequency 50/60 Hz
Output 3 x 230 V, star point brought out
Circuit Yyno
Impedance voltage 3%
No-load current I_o < 3% of the rated current
Inrush current surge max. 12 x I_N
Insulation class ta = 40°C/B
Thermostatic switch for acoustic or visual signal in case of impermissible heating
Class of protection I
Type of protection IP00
(Suitable for installation up to IP23)

Download Fact Sheet

GETRA´s success is no secret.

Our principle was and is to act in a forward-looking manner. In doing so, we attach a great deal of importance to quality and an optimal price performance ratio. We have high standards when it comes to our products, which are of course built and tested in line with the requirements of the VDE and DIN guidelines, and for this purpose, we have certified our quality management system according to ISO 9001!