Museum of Plugs and Sockets logo, small Perilex and pre-IEC 60309
plugs and sockets
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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

Outline Perilex 16A socket
CEE socket, replacement for Perilex CEE plug, replacement for Perilex Specicication and logo of unkown 16A 3-phase 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), Austria, Netherlands and Sweden, and can be regarded as an IEC 60309 precursor.
The Perilex socket schemes show two different types of wiring: T - S - R - 0(=N)  and  L1 - L2 - L3 - N   (* 0 = neutral contact). Explanation is given in note 2, below. The advanced position of PE contact ensures that earth contact is made first.
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.

note 1

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 in Germany and Austria, instead IEC 60309 devices have to be used. In homes (kitchens), hospitals and small businesses you will still find Perilex.
note 2
Perilex socket schemes show that two different types of wiring can be found. The original Perilex pin-out is shown top left. A three-phase motor connected to this socket will turn anti-clockwise. However, the 1988 (?) version of German DIN VDE 0100-550 defined clockwise as standard direction of rotation for AC motors. Designation of contacts R(L1) and T(L3) have been swapped.
5, 6  6a 5-pin, 3-phase socket (5) and corresponding plug (6) rated at 16A - 220/380V. They resemble to IEC 60309 16A-230/400V, but key position differs. Position of HST 165 socket  earth contact is at 7h, while it is 6h for IEC 60309 16A. Moreover plug diameter of HST 165 is 12 mm smaller than 16A 5-pin IEC 60309. HST 165 is designed for application where confusion with IEC 60309 must be avoided. Manufacturer: Dutch company HATEHA. The significance of "E-flash-J" logo is unknown.   {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 in Wien, Austria. Socket and plug have the same safety characteristics as 10-16A - 250 V Schuko devices. Therefore the designation SCHUKO was allowed for the 380V three-phase socket and plug. 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 was not available.   {WN}
14 Three-phase 15A - 380V plug, made by Gebrüder Merten in Gummersbach, Germany (GMG). The central line 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

Kontakt AG 1930s three-phase plug

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 - 380V. Pin dimensions: 8 mm wide, 2.5 mm thick, and 23 mm (line) 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. 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}
17 Lockable three-phase plug made in the 1930s by Kontakt AG in Frankfurt am Main. Images and details of this rare plug are given on a separate page.   {RH}


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

HH 500V 16A and 32A plugs Hazemeyer Hengelo 16A - 380V 3-phase plug
Hateha 16A-220/380V socket

18 - 20 Obsolete 3-phase, 3-pin + earth, 32A - 500V connector (type C13a) and plug (type C3a). 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 1960-80s 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.
21 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. See also plug no. 22.   {MK}
Hazemeyer Hengelo 16A - 380V, 3-phase + earth plug, type C433z. Pin diameter: 4.9 mm. Spacing between line pins: 15 mm.
Top image: plug in upside down position to show off the earth pin. Bottom image: shows the large metal ground plate. Earth pin is directly connected to the plate that keeps also the black, insulating polymer block with three power pins in position.
Dating: 1970s - early 1980s. It was the last model in a large range of plugs and connectors with power pins in a row. In the 1980s they were succeeded by IEC 60309 industrial standard models.    {JW}
The iron cast 16A - 500V plug shown in image no. 21 (left) is similar to the 16A - 380V plug no. 22. Power pin size and spacing is identical, but earth connector is different.


Classic 3-phase wall socket rated at 16A - 220-380V, with earth contact. Matching plug is shown in image 22.
Late twentieth century IEC 60309 became the industrial wiring standard, but functional applications according to "Nederlandse Passing" (Dutch fitting)* are still in use. For replacement the Dutch company HATEHA has 16A and 32A material in stock. Image 22a shows the HPW16 wall socket.
"Nederlandse Passing" refers to 3-phase plugs and matching sockets with four round pins (nos 22 and 22a) only. Not to 18-21.

500 Volt plug without name or rating 500 Volt plug without name or rating, inside

23, 23a Plug without any name, rating or marks. Given size and pin diameter (7 mm) it is likely that has been designed for 500 Volt and at least 32 Amp.   {MK}


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

24- 26 Obsolete 3-phase, 4-pin, 25A - 220/380V connector and plug*. The shown model with cast iron body and steatite inside has been made by VEB Elektroschaltgeräte Grimma in the 1960s-70s, but the design by Walther-Werke dates to the 1930s. VEB Elektroschaltgeräte Grimma  was the successor of Ferdinand Walther's Walther-Werke, founded in 1897 in Grimma near Leipzig. See list of German manufacturers for details about both companies. The triangular mark with number 1 indicates that plug and connector complied with TGL quality level 1 (see also caption to no. 29).   {PM}

* Besides the shown 25A model, the range of Grimma connectors consisted of: 10A, 16A, 25A, 40A, 63A and 100A connectors.
27- 28 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}
29 Marks on plug and connector nos. 27 and 28. 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. 27-28, 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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