EM10

 

EM10_1

 

Slovakian 110.021-3, photographed at the Skalite station on March 7, 2003. EM10 was to a certain extent based on this design.

 

EM10_2

 

EM10-002, photographed in Jelenia Góra on July 25, 2002. Photo by Marek Dąbrowski (thanks for permission!).

 

EM10_sc1

 

Side drawing of the EM10 in its original version…

 

EM10_sc2

 

…and after modernization. Both drawings by M.Ćwikła (SK vol. 9/2004).

 

EM10_3

 

EM10-102 (HCP 437/1990), location and date unknown. Photo by Z.Urbański (postcard from my collection).

 

 

Another picture of the EM10-102; Poznań Starołęka, September 16, 1993. Photo by Marek Niemiec (from my collection).

 

EM10_4

 

EM10-04 in its final form, Sławięcice, July 9, 2004. Photo by Ryszard Rusak (from my collection).

 

EM10_5

 

EM10-02, June 17, 2004, location unknown. Photo by Ryszard Rusak (from my collection).

 

 

All four EM10s (left to right: -03, -01, -02 and -04), photographed at the Poznań Franowo depot on November 25, 2012, by someone known as Klimalno; source: www.commons.wikimedia.org.

Until the appearance of E6ACT from ZNLE Gliwice (now Newag Gliwice) in 2009, EM10, or  factory type 405E, was the last electric locomotive entirely designed and built in Poland. Despite this distinction it is one of the least known types – no wonder with just four examples built.

The idea, conceived in 1986, was to produce a modern electric locomotive mainly for switching at large transfer stations and yards, but suitable also for light passenger and freight trains. Initially it had been intended to purchase such locomotives in Czechoslovakia, but finally an indigenous design was submitted (in fact, to a certain extent based on Czechoslovakian class E458.1, later re-classed 111 – one example, 111 016-2, was briefly tested by PKP in July and August 1988). It featured thyristor startup system, electrodynamic braking, single-arm current collectors, suspension with four Flexicoil springs for each truck and other novelties which rendered them modern compared to other types then in service. First two examples, EM10-101 and EM10-102, were built by HCP in June 1989 and accepted by PKP a few months later. In April 1991 two more followed, EM10-001 and EM10-002 (type 405Ea); they differed in startup systems being supplied by ČKD Elektron.

Initial service tests took place at the Poznań Franowo depot. First two EM10s experienced problems with indigenous startup systems, which were in 1993 replaced by the Czech units (on the same occasion several minor improvements were introduced). Several minor shortcomings were revealed, as it is usually the case with prototypes. They would have probably been eradicated in  production machines, but these never followed. Despite plans from mid-1980s to build 200 examples and overall needs estimated even at 400, no more EM10s were built. Those delivered served mainly in southern Poland and on occasions ran with passenger trains, although were found too weak for typical line service. Failure rate was fairly high; moreover, as few transfer stations and yards had actually been electrified, diesel locomotives were preferred. Since early 2000 EM10s saw very little service. In 2002 all were scheduled for modernization, completed by the Electric Locomotives Repair Works (ZNLE) of Gliwice in July 2004 (factory type 405Em). This included new power electronics (with IGBT transistors), modern control and on-board diagnostic systems; externally – apart from new livery – the most visible features were new current collectors and repositioned upper headlights. Service numbers were changed to EM10-01 (ex -001), EM10-02 (ex -002), EM10-03 (ex -101) and EM10-04 (ex -102). All four initially went to Wrocław and later to Nowy Sącz. In March 2009 they returned to Poznań and are currently dumped at the Franowo depot, awaiting decision on their final fate.

The idea of electric switching locomotives turned out to be premature, as only few large yards were actually electrified. On the other hand, due to decrease of passenger traffic in early 1990s, there was no need for a new locomotive for local trains. Be it as it was, EM10 was the most modern electric locomotive in the PKP service until the appearance of class EU43 in late 2007.


 

Main technical data

 

No.

Parameter

Unit

Value

1.

Years of manufacture

-

1990 – 1991

2.

Total built / used in Poland

-

4 / 4

3.

Axle arrangement

-

Bo’Bo’

4.

Control

-

individual1)

5.

Design maximum speed

km/h

80

6.

Traction motors (number X type)

-

4 X LKa493

7.

Voltage

V

3000

8.

One-hour rating

kW/hp

9.

Continuous rating

kW/hp

960 / 1305

10.

Electric current at one-hour rating

A

11.

Electric current at continuous rating

A

12.

Rotational speed at one-hour rating

rpm

13.

Rotational speed at continuous rating

rpm

14.

Engine suspension

-

nose-suspended

15.

Reduction gear ratio

-

71:16

16.

Diameter of drivers

mm

1100

17.

Total weight

kg

72 000

18.

Axle load

T

18.0

19.

Axle base

mm

10 500

20.

Overall length

mm

16 340

21.

Maximum width

mm

2 900

22.

Brake type

-

 

1) Multiple control systems removed during modernization.

 

References and acknowledgments

 

-        Monographic article by Paweł Terczyński (SK vol. 9/2004),

-        Modernization description by Bogdan Waga (KMD vol. 3/2005),

-        www.kolejowaklatka.org,

-        www.bluefish.foxnet.pl,

-        AL.