Museum of Plugs and Sockets logo, small Perilex and pre-IEC 60309
plugs and sockets (mainly German)
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In Germany several types of heavy duty and 3-phase plugs and sockets have preceded the now commonly used IEC 60309 standard.
One of them, the Perilex type is still used for non-industrial purposes. Other models shown here are now obsolete


Perilex 16A socket Perilex 16A plug Perilex 25A socket Perilex 25A plug
CEE socket, replacement for Perilex CEE plug, replacement for Perilex Specification and logo of CEE 16A-400V plug

1, 2 Perilex 380-400V, 16A three-phase socket and plug. Perilex plugs were commonly used in the western part of Germany (former BRD), Netherlands and Sweden, and can be regarded as an IEC 60309 precursor.
3, 4 Perilex 380-400V, 25A three-phase socket and plug. The pin configuration is identical to the 16A version (nos. 1, 2), except for the orientation of the central, flat blade protective earth.


Perilex has been designed in 1951 by Busch-Jaeger Electro GmbH (now part of the ABB Group).
From 1975 the use of Perilex for new industrial installations is no longer allowed, instead IEC 60309 devices have to be used.
In homes (kitchens), hospitals and small businesses you will still find Perilex. All major German electrotechnical brands still (2016) produce 16A and 25A Perilex plugs and sockets.
5, 6  6a A CEE (Certification of Electrotechnical Equipment) socket and plug have been developed with the intention to replace 16A Perilex devices (see nos. 1, 2). The CEE plug resembles the IEC 60309 16A-230/400V plug, but is somewhat smaller. Plug and socket have never achieved sufficient commitment of electrotechnical installers. For domestic appliances Perilex is still used, rather than the CEE or IEC 60309 equivalent. Brand name is unknown. The logo (see image no. 6a)  shows the capitals E J, separated by a flash symbol. Does anybody recognizes the logo ? If so, please inform me.   {ES}

Obsolete German 25A 250V socket Obsolete German 25A 250V plug Obsolete ABL 10A 3-phase socket Obsolete ABL 10A 3-phase plug

Three-phase 10A 380V socket made by Ernst Maté
Three-phase 10A 380V socket made by Ernst Maté, inside
Three-phase 10A 380V socket made by Ernst Maté, detail
Three-phase 10A 380V socket made by Merten

7, 8 Obsolete 250V, 25A single phase socket and plug.  Two plugs of this type in the museum collection have the name SCHUKO on its housing (see note below). One has been made by ABL (Albert Büttner, Lauf, bei Nürnberg; now ABL SURSUM, Bayerische Elektrozubehör GmbH), the other by Leopold Kostal (Lüdenscheid, Germany). The socket shown has brand  name: Presto, trademark of Presto-Vedder GmbH, Dortmund, Germany. Another socket in the collection has a logo that has been used between 1951 and 1979 by Busch-Jaeger Electro.
9, 10 Obsolete three-phase socket and plug, rated at 10A-380V (socket) and 16A-380V (plug). 380 Volt refers to times when domestic networks offered 220V, rather than the today's (continental) European standard of 230V.
The porcelain inner part of socket no. 9 has been made in East Germany by VEB IKA (existed from 1958 till 1958; IKA stands for Installationen, Kabel und Apparate, Leipzig) and has a quality nr. 1 mark (see nr. 11). The housing of the socket shows also an unknown logo that is also found on plug no. 15.
Plug no. 10 has been made by Bayerische Elektro-Zubehör in Lauf bei Nürnberg, Geramny (ABL).

In a 1966-67 German catalog these three-phase plugs and sockets were designated as Schuko devices. See note below.
11 -13
Three-phase 10A - 220/380V flush type socket, made by Ernst Maté*. The socket is similar to no. 9, but the earth and neutral clips are linked with a jumper (green arrow in image no. 12). Image no. 13 shows that for a technician it was easy to remove the jumper. Combining earth and neutral was an often chosen solution if a separate protective earth wire is not available.   {WN}

* Ernst Maté Gesellschaft m.b.H. was founded in 1918 in Wien (Vienna, Austria). It merged in 1972 with Presswerk Erlacher (Villach, Austria) and renamed to MPE (Maté Presswerk Erlacher). MPE went bankrupt in 1976, was bought by Legrand and became Legrand Österreich in 1978 (information given by Ragnar Bartuska).
14 Three-phase 15A - 380V plug, made by Gebrüder Merten in Gummersbach, Germany (GMG). The central live pin has two grooves. Plugs with this deviant type of pin - and matching sockets - were used when different electricity tariffs were used. Lighting tariff (Lichttarif) had to be paid for illumination and relative low wattage equipment in homes. Domestic tariff (Haushalttarif or Küchentarif) for heating, electric stoves, washing machines, irons, vacuum cleaners etc. Commercial tariff (Gewerbetarif) had to be paid for workshops etc. Pins with two grooves were used for domestic  applications. See also page on uncommon continental European plugs and sockets.   {WN}

The name Schuko is commonly used for single phase (2-pin) plugs with earth clips, but above all Schuko (Schutzkontakt) refers to two characteristics that offers enhanced safety: (i) sockets are recessed which makes it impossible to touch pins under tension, and (ii) earth contact is made first. Socket nos. 7 and 9 are recessed, and the earth pin of plug no. 8 and neutral and earth strips of no. 10 make contact first.

DDR 10A 380V three-phase plug Three-phase 15A 380V plug made by Hazemeyer

15 Three-phase 380V, 10A plug, made in the former German Democratic Republic. The triangular mark with number 1 indicates that plug complied with TGL quality level 1 (click here for explanation of DDR Gütezeichen). The inset bottom right shows an unknown logo that probably refers to the manufacturer.   {PM}
16 Three-phase plug with flat pins, rated at 15A 0 380V. Pin dimensions: 8 mm wide, 2.5 mm thick, and 23 mm (live) and 26 mm (neutral, earth) long. Neutral pin is indicated as 0 (zero, according to Dutch pin nomenclature). Life pins are indicated as B, G, R*. Manufacturer:  Hazemeyer in Hengelo, Netherlands (see also no. 17). Dating: probably 1950s-'60s.
* In Dutch, B could be blauw or bruin (blue, brown) wire colour , G: groen (green) and R: rood (red). However, until 1970 colours for R, S and T (respectively L1, L2 and L3) were green, black and dark blue. From 1970 it is brown, black and grey.   {WN}


Hazemeyer-Holec 32A 500V outlet and plug Hazemeyer-Holec 32A 500V outlet Hazemeyer-Holec 32A 500V plug

HH 500V 16A and 32A plugs 500 Volt plug without name or rating
500 Volt plug without name or rating, inside

17 - 19 Obsolete 3-phase, 3-pin + earth, 32A - 500V connector and plug. Metallic cast. In the past power pins were indicated by R, S and T (now respectively: L1, L2 and L3). Also a similar 16A - 380V version has existed, see nos. 15-16. In the 1969-80s these devices were quite popular in workshops. Brand name: Hazemeyer, a Dutch company, now being a part of Eaton Corporation. The double H logo first has been used for Hazemeyer Hengelo (Dutch town were the company was based), but later - after merging with Holec - it could also be used for Hazemeyer Holec and finally for Holec Holland.
20 Hazemeyer Hengelo 16A - 500V, 3-pin + earth, 3-phase plug. The plug has been used for decades in a barn, hence the clear signs of corrosion. The design is comparable to, but smaller than the 32A model, shown right.   {MK}
21, 22
Plug without any name, rating or marks. Given it size and pin diameter (7 mm) it is likely that has been designed for 500 Volt and at least 32 Amp.   {WN}

Grimma 25A 380V outlet and plug Grimma 25A 380V outlet Grimma 25A 380V plug

DDR 10A 250V heavy duty plug
DDR 10A 250V heavy duty connector
Marks on DDR 10A 250V plug and connector

23- 25 Obsolete 3-phase, 4-pin, 25A - 220/380V connector and plug. They have been made by Grimma from late 1960s till the end of the German Democratic Republic (DDR) in 1990. The company still exists as ESA (Elektroschaltanlagen) Grimma GmbH, based in Grimma near Leipzig, Sachsen, Germany. The triangular mark with number 1 indicates that plug and connector complied with TGL quality level 1 (see also caption to no. 28).   {PM}
26- 27 Obsolete, DDR single phase plug and connector, rated at 10A - 250V. Pin diameters: 4 mm (power pin 1 and 2), and 5 mm (earth pin = 0). Plug and connector have a zinc alloy die casting and are water and dust protected according to IP 68 grade. Plug has a TGL top quality Gütezeichen. Material has once been used by the army of the German Democratic Republic.   {WM}
28 Marks on plug and connector nos. 26 and 27. Top left-mid: top quality mark given by DAMW*; top right: SLF logo of the yet unknown manufacturer (see note below); bottom: TGL** mark and number of plug no. 26 (connector no. 27 has number 57-1023).
* Deutsches Amt für Material und Warenprüfung (comparable to [western] German VDE).
** Technische Güte- und Lieferbedingungen (comparable to DIN). Click here for details.

note on

Nowadays (2016) two companies exist that use the abbreviation SLF.
(1) Spindel- und Lagerungstechnik Fraureuth (near Zwickau, Sachsen). Already in GDR times they produced rolling bearings. Although their current logo bears some resemblance to the SLF logo on plugs, there is no indication that they ever have made plugs.
(2) The DDR-Army has used plugs, identical to nos. 26-27, that were designated as 'System Finow, made by SLF'. The company Spezialgeräte und Leuchtenbau Finow in Eberswalde, near Berlin, could be related to the Finow System. However, it is unknown whether the company was already active in the GDR. Note that the SLF logo on plugs seems to show a stylized lamp.


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