Konstal 105Na

Konstal 105Na in Szczecin (Piastów street)

Konstal 805Na in Grudziądz (Focha street)

The Konstal 105Na are a class of Polish trams manufactured from 1979 to 1992 in workshops Konstal Chorzow, Poland. The narrow-gauge version is designed as 805Na. Currently, they are the most common operating trams in Poland.

Construction

105Na is unidirectional motor tramcar, equipped with four doors.

It represents the development of the earlier tram Konstal 105N, the main changes being the location of the components of the electrical equipment which were transferred from under the steps to the back wall of the driver's cabin, the introduction of a separate cabin for the driver and the removal of the small windows under the front and side windscreens. The most important change was the introduction of motor grouping, which reduced the energy consumption by 12%. During initial acceleration, the four motors are connected in series, whilst at higher speeds, two groups of motors are connected in parallel.

In service, the 105Na vehicles were the subject of various modifications and upgrades (including changes in the electrical system, new front plastic, change of the door opening mechanism, and even re-design, for Poznań, to the bidirectional Konstal 105NaDK). Older 105N cars have been modernised to the 105Na standard.

Other variants

The Konstal 105Na and 805Na trams provided the basis for the production of a large number of variants:

• 106N - thyristor based, 7 units built in 1977-1987, later converted to standard 105Na
• 105NT - thyristor based, 13 units built in 1985-1989, later converted to standard 105Na
• 805NS - meter-gauge with new accelerator, 12 units built in 1984-1990
• 105Nb - new doors and bogies, 15 units built in 1988-1993
• 805Nb - meter-gauge version of the 105Nb
• 111N - bidirectional, 6 units built in 1993
• 106Na - thyristor based, 8 units built in 1991-1993
• 105Ne - slightly thicker walls, 18 units built in 1993
• 105Nb/e - slightly modified electrical system, 6 units built in 1994
• 105Nf - modernized brakes and drivers console, 44 units built in 1994-1996
• 105Ng - three doors, static converter and modified breaks, 2 units built in 1993 additional units obtained by modernizing 105Na
• 105Np - static converter, single unit built in 1994
• 105Nm - similar to 105Nf but with a static converter, 14 units built in 1996-1997
• 105Nz - thyristor based and asynchronous motor, 2 units built in 1997
• 105N1k - similar to 105Ng but thyristor based, 3 units built in 1995
• 105N1k2 - similar to 105N1k but with electrical systems from a different supplier, 60 units built in 1995-2000
• 105N2k2000 - similar to 105N1k2 with a plastic front and rear, 36 units built in 2001

Production numbers

The number of standard-gauge version 105Na vehicles produced is 1443 while the number narrow-gauge version, the 805Na, is 691.

Operators

These trams are used in all Polish cities which operate a tram system and they are the largest group in the stock.

Operator	Number
MZK Bydgoszcz	117
MPK Częstochowa	48
ZKM Elbląg	21
ZKM Gdańsk	115
MZK Gorzów Wielkopolski	18
Tramwaje Śląskie	299
MZK Grudziądz	20
MPK Kraków	181
MPK Łódź	439
MPK Poznań	252
Tramwaje Szczecińskie	173
MZK Toruń	55
Tramwaje Warszawskie	561
MPK Wrocław	350