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Franzen Feuerschutztüren GmbH
Gerhard-Welter-Str. 7
D-41812 Erkelenz

phone +49 (0) 2431-80070

Franzen doors for transformer rooms

Single-leaf steel door for transformer rooms TR-1

Franzen transformer room door TR-1
Single-leaf steel door, double-walled for transformer stations

CE-marking marked

Flush with surface

flush-mounted design FLAT

Explosion protection
Logo ATEX For installation in potentially explosive areas, please see confirmation letter Explosion protection ATEX for Franzen hinged doors (in German language) System Schröders (PDF)

Performance characteristics combinable with further Franzen door types:

Fire resistance

tested EI290 (fire door EI2 90 Franzen TSN-11)
tested EI260 (fire door EI290 Franzen TSN-3)
tested EI230 (fire door EI290 Franzen TSN-1)

according to EN 1634-1

T90 (fire door T90 Franzen TSN-11)
T30 (fire door T30 Franzen TSN-1)

according to. allgemeine bauaufsichtliche Zulassung (German approval)

Smoke control

RS (e.g. smoke control door Franzen RSN-1)

according to DIN 18095

Burglar resistance

up to RC4 (z.B. burglar resistance door Franzen ESN-1)

according to DIN EN 1627 ff

Acoustic performance

up to RW (C;Ctr) = 53 (-1;-5) dB (z.B. acoustic performance door Franzen SN-1)

according to EN ISO 10140-1 / EN ISO 10140-2 / EN ISO 717

Thermal transmittance

UD-value ≥ 1.3 W/(m²K) according to EN ISO 10077-1 (e.g. external door Franzen ASN -1)

Air tightness

up to class 4 (e.g. external door Franzen ASN -1)

according to EN 12207 (up to 600 Pa)

Installation in external walls

according to DIN EN 14351-1 CE-Zeichen marked

Resistance to wind load

up to class C5 (up to 2,000 Pa) (e.g. external door Franzen ASN -1)

according to EN 12210


up to class 8A (e.g. external door Franzen ASN -1)

according to EN 12208

Resistance to positive and negative pressure

up to 5.000 Pa (e.g. external door Franzen ASN -1)

according to DIN EN 12211

Behavior between different climates

class 2 (d + e) (e.g. external door Franzen ASN -1)

according to EN 12219 (deflection)

Ability to release

for doors in escape and rescue routes (e.g. external door Franzen ASN-1)

Technical data
(rough building dimension)
no specification
Door leaf

leaf thickness 68 mm to 69 mm - smooth double-walled
plate thickness 1.0 mm to 1.5 mm

  • thin rebate design
    • optional thick rebate design
Frame no specification
Floor seal no specification
  • lamella ventilation
    • Standard design: Fixed, angled and poke-proof A-lamellas made of galvanized sheet metal
      • optional with fly wire behind for insect protection
      • optional other lamella design

ventilation size and number of ventilations depending on the transformer output

Glass inset

glass dimensions and -form variable

minimum frieze width: 90 mm

  • optional with intermediate glass inset bars
  • optional with port-hole
  • optional in overhead panel

glass inset bars with concealed screw connection (for rectangular glass inset)


2/3-part KO door hinges
with patented easy-running bearings as easy running doors

  • optional door hinge with 3D adjustment

various fittings possible


various locking systems possible
profile cylinder prepared (cylinder on-site)


door closer

  • optional spring hinge for smaller doors / flaps
  • in masonry
  • in concrete
  • in aerated concrete
  • in mounting walls
  • in encased steel columns
  • optional blunt installation in soffit
  • optional installation on the wall plate
  • lock control
  • automated opening
  • motor locks ( also in 3-way locking)
  • powder coating in RAL colors
  • special solutions according to request and customer requirements

The information given refers to the usual configurations. Individual configurations may be required when combining different performance characteristics.

Our team will be happy to assist you with the individual planning of your requirements.

  • transformer room door TR-1
    Franzen TR-1single-leaf transformer room door

TR-1 Downloads