South African Class 22E

No. 22-020 at Pyramid South on 22 September 2015

Type and origin
Power type	Electric
Designer	Zhuzhou Electric Locomotive Co.
Builder	Zhuzhou Electric Locomotive Co. Transnet Engineering
Order number	TFRAC-HO-8608
Model	ZELC 22E
Build date	2015-
Total produced	359

Specifications
Configuration:
• AAR	C-C
• UIC	Co'Co'
• Commonwealth	Co-Co
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Length:
• Over couplers	20,700 mm (67 ft 11.0 in)
• Over beams	20,192 mm (66 ft 3.0 in)
• Body	19,652 mm (64 ft 5.7 in)
Power supply	Catenary
Electric system/s	Transformer type TBQ56-5640/25
Current pickup/s	Pantographs
Traction motors	Six
Loco brake	Electro-pneumatic, regenerative & rheostatic
Train brakes	Air
Couplers	AAR knuckle

Performance figures
Power output	4,600 kW (6,200 hp)

Career
Operators	Transnet Freight Rail
Class	22E
Power class	Dual 3 kV DC & 25 kV AC/50Hz
Number in class	359
Numbers	22-001 to 22-359
Delivered	2015-
First run	2015

The Transnet Freight Rail Class 22E of 2015 is a South African electric locomotive.

On 10 April 2015, the first Class 22E dual voltage six-axle locomotive for Transnet Freight Rail was rolled out by the CSR Zhuzhou Electric Locomotive Company in China.^[1]^[2]

Manufacturers

The first forty Class 22E dual voltage 3 kV DC and 25 kV AC Co-Co locomotives for Transnet Freight Rail were built in China by Zhuzhou Electric Locomotive Company, a subsidiary of the China South Locomotive and Rolling Stock Corporation (CSR). The roll-out ceremony of the first locomotive, no. 22-002, took place at the factory on 10 April 2015. The rest of the order for 359 locomotives are being built locally at the Koedoespoort shops of Transnet Engineering in Pretoria.^[1]^[2]

The acquisition of the Class 22E forms part of the largest-ever locomotive supply contract in South African history and the single-biggest investment initiative by a South African corporation. It consists of contracts for the construction of 1,064 locomotives by four global original equipment manufacturers:^[3]^[4]

CSR Zhuzhou Electric Locomotive Company, for 359 Class 22E dual-voltage electric locomotives.^[3]^[4]
Bombardier Transportation South Africa, for 240 Class 23E dual-voltage electric locomotives.^[3]^[4]
General Electric South Africa Technologies (a unit of the U.S.-based GE Transportation), for 233 Class 44-000 diesel-electric locomotives.^[3]^[4]
CNR Rolling Stock South Africa (Pty.) Ltd., for 232 Class 45-000 diesel-electric locomotives.^[3]^[4]

The builder's plates on the Chinese-built locomotives are inscribed with the year 2015, but for an unknown reason the plate on no. 22-041, the first of the South African-builts, is incorrectly inscribed "2014".

The Class number

In the 1930s, during the steam era of the South African Railways, a heavier mainline version of the Class 21 2-10-4 steam locomotive, the Class 22 2-10-4, was proposed, but never built. The Class 22E is therefore the first locomotive in South Africa to receive this class number.^[5]

Characteristics

The locomotive body is a welded monocoque design, constructed of steel plates and profiled members. The Class 22E locomotive is virtually identical in visual appearance to the earlier Class 20E and Class 21E locomotives, but longer, with a different wheel arrangement and a different interior layout.^[6]

It has a nominal rating of 4,600 kilowatts (6,200 horsepower). This is the second type of modern Co-Co design electric locomotive to join Transnet's fleet after the heavy-duty Class 15E, which is used on the Sishen-Saldanha (Orex) route. Both these locomotives are single cab types.^[7]

Layout

Driver's station of no. 22-013

Compressor

Toilet

The Class 22E has a single cab and a gangway along the centre of the locomotive, while the interior layout and placement of equipment is as follows, from the cab towards the rear:^[6]

Left side

Air conditioner.
Low voltage cubicle.
Service entrance portal and door.
Power converter cubicle 1.
Cooling tower 1.
Ventilation cubicle.
Traction motor blower 2.
Integrated cubicle.
Air reservoir 2.
Braking resistor 1.
Braking cubicle.^[6]

Right side

Signal cubicle (19" rack).
Battery charger.
Traction motor blower 1.
Auxiliary transformer.
Cooling tower 2.
Power converter cubicle 2.
High voltage cubicle.
Air reservoir 1.
Air drier and main compressor.
Braking resistor 2.
Toilet, with a porta-potty and hand washbasin.^[6]

Dual voltage

Transformer specifications: 22-013

As on the dual voltage Classes 19E, 20E and 21E, the main electric circuit is automatically selected in either AC or DC mode based on the voltage of the overhead contact wire feeding the locomotive. To facilitate automatic trouble-free transition on the run, the locomotive is equipped with onboard voltage detectors, while the overhead wire is equipped with two wooden isolators and a 3 metres (10 feet) length of neutral wire to separate the AC and DC feeds. The neutral section is connected to the rails which serve as the return conductor on electrified lines.^[2]^[8]

Track magnet sensor

The transition process requires that the locomotive should automatically be switched off before it reaches the isolators and the unpowered overhead wire section, and automatically be restarted after exiting from under the unpowered wire. This is done by a pair of track magnets, one on either side of the neutral overhead wire and spaced 45 metres (148 feet) apart. The two magnets are mounted with their polarities reversed in relation to each other and they activate a magnetic relay located behind the cowcatcher of the locomotive to do the switching off and restarting.^[8]

Pantographs

Transnet Freight Rail insisted that the locomotive must be designed in such a way that the pantograph contact shoe centres are directly above the bogie pivot centres, as was done on the Class 7E and Class 7E2, Series 1 and Series 2, and again on the Classes 20E and 21E. The reason is to reduce the possibility of pantograph hookups on catenary in sharp curves, such as in turnouts, as a result of sideways movement of the pantograph in relation to the overhead wire.^[9]

Illustration

No. 22-012 at Pyramid South on 22 September 2015
No. 22-009 at Pyramid South on 27 September 2015
No. 22-013 at Pyramid South on 22 September 2015
No. 22-045 at Koedoespoort, Pretoria on 29 September 2015

References

Wikimedia Commons has media related to South African Class 22E.

1 2 (Chinese) China 's largest rail transportation equipment export orders start delivery (Accessed 16 November 2015)
1 2 3 Railways Africa, 15 May 2015: Transnet's Class 22E Loco
1 2 3 4 5 RailwayAge, 17 Mar 2014: Transnet: 1,064 locomotives, $5 billion (Accessed 23 Nov 2015)
1 2 3 4 5 Railway Gazette, 17 March 2014 - South Africa's 'largest ever' locomotive order awarded to four suppliers (Accessed 31 Dec 2015)
↑ Holland, D. F. (1972). Steam Locomotives of the South African Railways. 2: 1910-1955 (1st ed.). Newton Abbott, Devon: David & Charles. pp. 73–76. ISBN 978-0-7153-5427-8.
1 2 3 4 Machine Room Equipment Arrangement - ZELC Diagram SA22E-DW-CO2, Issue A, 4 May 2014, drawn by Xing Tao
↑ Railway Gazette, 25 November 2015 - Transnet tests diesel and electric locos (Accessed 31 Dec 2015)
1 2 Class 20E manual: Part 1: Locomotive Profile and Technical Data
↑ South African Railways Index and Diagrams Electric and Diesel Locomotives, 610mm and 1065mm Gauges, Ref LXD 14/1/100/20, 28 January 1975, as amended

Locomotives of South Africa

Steam

7' ¼" gauge	East London 0-4-0VB Table Bay 0-4-0ST Table Bay 0-4-0T Table Bay 0-4-0WT
4' 8½" gauge	Cape 0-4-0T Blackie Cape 0-4-2 Cape 2-4-0T CGR 0-4-0ST Aid Natal 0-4-0ST Durban Natal 0-4-0WT Natal Natal 4-4-0T Perseverance
3' 6" gauge Tank engines	CGR 0-4-0ST 1873 CGR 0-4-0ST 1874 CGR 0-4-0ST 1881 CGR 0-4-0ST 1881 Coffee Pot CGR 0-6-0ST CGR 0-6-0T CGR 2-6-0ST 1900 CGR 2-6-0ST 1902 CGR 1st Class 0-4-0ST 1875 CGR 1st Class 0-4-0ST 1876 CGR 1st Class 2-6-0ST CGR 1st Class 4-4-0T CGR 2nd Class 4-4-0T CGR 3rd Class 2-6-0T CGR Railmotor CSAR Class C CSAR Class E CSAR Rack 4-6-4RT CSAR Railmotor Durban's Congella Durban's Edward Innes Durban's John Milne Durban's Sir Albert Port Elizabeth 0-4-0ST Kowie Railway 0-6-0T Kowie Railway 4-4-0T Metropolitan & Suburban 4-6-2T NGR 2-6-0T Durban & Pietermaritzburg NGR Class I 2-6-2T NGR Class K 0-4-0ST NGR Class K 0-6-0ST NGR Class K 2-6-0T NZASM 10 Tonner NZASM 13 Tonner NZASM 14 Tonner NZASM 18 Tonner NZASM 19 Tonner NZASM 32 Tonner NZASM 40 Tonner PPR 26 Tonner PPR 35 Tonner Portuguese SAR Class A SAR Class B SAR Class C SAR Class C1 SAR Class C2 SAR Class D SAR Class E SAR Class F SAR Class G SAR Class H SAR Class H1 SAR Class H2 SAR Class J SAR Class K SAR Railmotor SAR Dock 0-4-0ST SAR Dock 0-4-0T SWA 2-8-0T
3' 6" gauge Tender engines	CGR 1st Class 2-6-0 1876 BP CGR 1st Class 2-6-0 1876 Kitson CGR 1st Class 2-6-0 1879 CGR 1st Class 2-6-0 1891 CGR 1st Class 4-4-0 CGR 1st Class 4-4-0TT CGR 2nd Class 2-6-2TT CGR 3rd Class 4-4-0 1883 CGR 3rd Class 4-4-0 1884 CGR 3rd Class 4-4-0 1889 CGR 3rd Class 4-4-0 1898 CGR 3rd Class 4-4-0 1901 CGR 3rd Class 4-4-0 1903 CGR 4th Class 4-4-2 CGR 4th Class 4-6-0TT 1880 CGR 4th Class 4-6-0TT 1882 CGR 4th Class 4-6-0TT 1882 Joy CGR 4th Class 4-6-0TT 1884 CGR 5th Class 4-6-0 1890 CGR 5th Class 4-6-0 1891 NGR Havelock NGR Class I SAR Class Exp 1 SAR Class Exp 2 SAR Class Exp 3 SAR Class Exp 4 SAR Class Exp 5 SAR Class Exp 6 SAR Class S SAR Class S1 SAR Class S2 SAR Class 1 SAR Class 1A SAR Class 1B SAR Class 2 SAR Class 2C SAR Class 3 SAR Class 3A SAR Class 3B SAR Class 4 SAR Class 4A SAR Class 5 SAR Class 5A SAR Class 5B SAR Class 6 SAR Class 6A SAR Class 6B SAR Class 6C SAR Class 6D SAR Class 6E SAR Class 6F SAR Class 6G SAR Class 6H SAR Class 6J SAR Class 6K SAR Class 6L SAR Class 6Y SAR Class 6Z SAR Class 7 SAR Class 7A SAR Class 7B SAR Class 7C SAR Class 7D SAR Class 7E SAR Class 7F SAR Class 8 SAR Class 8A SAR Class 8B SAR Class 8C SAR Class 8D SAR Class 8E SAR Class 8F SAR Class 8R SAR Class 8X SAR Class 8Y SAR Class 8Z SAR Class 9 SAR Class 10 SAR Class 10A SAR Class 10B SAR Class 10C SAR Class 10D SAR Class 11 SAR Class 12 SAR Class 12A SAR Class 12B SAR Class 13 SAR Class 14 SAR Class 14A SAR Class 14B SAR Class 14C 1st SAR Class 14C 2nd SAR Class 14C 3rd SAR Class 14C 4th SAR Class 15 SAR Class 15A SAR Class 15B SAR Class 15C SAR Class 15CA SAR Class 15E SAR Class 15F SAR Class 16 SAR Class 16A SAR Class 16B SAR Class 16C SAR Class 16D SAR Class 16DA 1928 SAR Class 16DA 1930 SAR Class 16E SAR Class 17 SAR Class 18 SAR Class 19 SAR Class 19A SAR Class 19B SAR Class 19C SAR Class 19D SAR Class 20 SAR Class 21 SAR Class 23 SAR Class 24 SAR Class 25 SAR Class 25NC SAR Class 26 SAR Katanga SWA 2-8-0
3' 6" gauge Articulated engines	CGR Fairlie CGR Kitson-Meyer SAR Class FC SAR Class FD SAR Class GA SAR Class GB SAR Class GC SAR Class GCA SAR Class GD SAR Class GDA SAR Class GE SAR Class GEA SAR Class GF SAR Class GG SAR Class GH SAR Class GK SAR Class GL SAR Class GM SAR Class GMA SAR Class GO SAR Class HF SAR Class KM SAR Class MA SAR Class MB SAR Class MC SAR Class MC1 SAR Class MD SAR Class ME SAR Class MF SAR Class MG SAR Class MH SAR Class MJ SAR Class MJ1 SAR Class U
2' 6" gauge	Cape Copper John King & Miner Cape Copper Britannia Cape Copper Caledonia Cape Copper Clara Cape Copper Condenser Cape Copper Scotia Namaqua Copper Pioneer Walvis Bay 2-4-2T Hope
2' & 600mm gauges	ACR Class NG-G16A CGR NG 0-4-0T CGR NG 0-6-0T CGR NG 4-6-2T CGR Type A 2-6-4T CGR Type C 0-4-0T NGR Class N 4-6-2T SAR Dutton SAR NG 0-4-0T SAR Class NG1 SAR Class NG2 SAR Class NG3 SAR Class NG4 SAR Class NG5 SAR Class NG6 SAR Class NG7 SAR Class NG8 SAR Class NG9 SAR Class NG10 SAR Class NG-G11 SAR Class NG-G12 SAR Class NG-G13 SAR Class NG-G14 SAR Class NG15 SAR Class NG-G16 SWA Class Ha SWA Class Hb SWA Class Hc SWA Class Hd SWA Jung SWA Zwillinge

Electric

Amcoal Class E38

Gas-electric

SAR Gas-electric

Diesel

3' 6" gauge Diesel-electric	PRASA Class Afro 4000 SAR Class DS SAR Class DS1 SAR Class 31-000 SAR Class 32-000 SAR Class 32-200 SAR Class 33-000 SAR Class 33-200 SAR Class 33-400 SAR Class 34-000 SAR Class 34-200 SAR Class 34-400 SAR Class 34-500 SAR Class 34-600 SAR Class 34-800 SAR Class 34-900 SAR Class 35-000 SAR Class 35-200 SAR Class 35-400 SAR Class 35-600 TFR Class 35-800 SAR Class 36-000 SAR Class 36-200 SAR Class 37-000 Spoornet Class 39-000 TFR Class 39-200 TFR Class 43-000 TFR Class 44-000
2' gauge Diesel-electric	SAR Class 91-000
3' 6" gauge Diesel-hydraulic	SAR Class 61-000
3' 6" gauge Electro-diesel	Spoornet Class 38-000

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