Product Description


TTMS Series

Isolating Transformer

For supply of medical rooms, PRI 230 Vac, SEC 115/230 Vac, 3,150 - 8,000 VA


  • PTC resistor built into every coil to set up an external monitoring unit for protection against overload
  • High efficiency
  • Simple mounting thanks to robust metal mounting brackets with 8 slots
  • Safe galvanic isolation
  • Very low idle current
  • Low short-circuit voltage
  • Very good switch-on behaviour thanks to reduced starting currents
  • Contact protected screw connection terminals complying with UVV BGV A3
  • Very good corrosion protection and low noise thanks to BLOCK IMPEX vacuum impregnation


Isolating Transformers

Isolating transformers with galvanic isolation provide a reliable supply to circuits with the safety measures “protective separation”. The transformers provide double or reinforced isolation between the primary and secondary sides. Any requested network configuration is possible for the secondary side, whether this involves a monitored isolated system or grounded system with fuse elements. The output voltage for the isolating transformers can be between 50 Vac and 1,000 Vac or 120 Vdc and 1,415 Vdc. BLOCK's standard range includes power outputs of up to 1 MVA.

  • Double or reinforced isolation between the primary and secondary sides
  • Flexible structure for the secondary side network configuration
  • Power output: 50 Vac to 1,000 Vac or 120 Vdc to 1,415 Vdc
  • Power output: up to 1 MVA, higher power ratings upon request


Isolating transformer for supply of medical rooms of the user group 2.


Rated Power

3,150 - 8,000 VA


Up to 97%

Maximum Ambient Temperature

40 °C


Class B

Degree of Protection

IP 00

Optionally adapted package for higher degrees of protection

Rated Output Voltage

115 and 230 Vac

Rated Input Voltage

230 Vac


VDE 0570 Part 2-15, VDE 0100 Part 710, DIN EN 61558-2-15, EN 61558-2-15

Specifications vary between configurations. Refer to the Configurations below for more information and links to the manufacturer's website.


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