DE8703832U1 - Electric motor, especially for pumps - Google Patents

Description

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COHAUSZ & FLORAOK

PATENT ATTORNEY'S OFFICE SCHÜMANNSTR. 97 D^400Ö DÜSSELDORF 1

Telephone: (02il) 683346 · Telelax: (0211! 679087t - Toicy: 8S86S13 cop d

PATENT ATTORNEYS: DipNng. W. COHAUSZ ■ Dinl-.lng. R. KNAUF . DipUng H B. COHAUSZ · Öipl.-Ing. D. H. WERNER · Dr. rer. nat. B. REOlES

16.03*1967 - 3 - HC/Sr 47081G B

WILO-Werk GmbH & Co*
Pump and equipment construction
Nortkirchenstrasse 100
4600 Dortmund-Münster 30

Electric motor, especially for pumps

The invention relates to an electric motor, in particular for pumps, with an electrical connection module attached to the motor housing and a switchover plug that determines the motor speed.

It is known to change the speed of electric motors by means of a changeover plug which is plugged into the terminal box of the motor and switches different speeds in different plug positions . In addition, it is known from German patent specification 33 k2 967 to attach a connection module to the electric motor in which a motor protection switch is housed.

The object of the invention is to create an electric motor, in particular for pumps, in which the motor protection is easy to attach, a separate control box is unnecessary and simple retrofitting is possible.

This object is achieved according to the invention in that between the connection module and the switch plug a

Module detachably attached (c) which has devices for motor protection!

Such a motor protection module is a functional disk that can be easily installed either in advance or later by plugging it in. This makes it particularly easy to accommodate the variety of electric motors and pumps that are required. In addition, additional functions required for the pump or motor can be provided in this module.

It is particularly advantageous if the motor protection module is attached to the connection module via a plug connection with contacts and counter contacts. The plug connection between the connection module and the motor protection module should also be the same as the plug connection between the motor protection module and the plug.

Preferably, it is suggested that the motor protection module responds to overcurrent, whereby the response sensitivity varies depending on the speed level. Additionally or alternatively, the motor protection module can have a trigger device for overtemperature sensors! It is also particularly advantageous if the motor protection module can be used for alternating current and three-phase motors!

Preferably, it is suggested that the motor protection module has an on/off switch! The motor protection module can also have a switch for resetting the circuit breaker after a fault. It is particularly advantageous if the motor protection module has a direction of rotation indicator that shows the direction of rotation of the motor.

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An exemplary embodiment of the invention is shown in the drawing and is described in more detail below. They show:

Fig. 1 a pump with a plug connected to the terminal box,

Fig. 2 the pump with the plug removed,

Fig. 3 the pump with a motor protection module connected to the terminal box,

Fig* 4 the pump with the motor protection module connected to the terminal box and a plug connected to the motor protection module.

The electric motor 1 has a housing 2 to which the housing 3 of a centrifugal pump Δ is coaxially flanged! The pump housing has an inlet 5 and an outlet 6!

A cubic terminal box 7 is attached to the side of the motor housing 2, from which the electrical connecting cables run into the interior of the motor! On the front side 8 of the terminal box 7, which is parallel to the front side 9 of the electric motor, there is a socket part 10 with several openings 11 containing sockets, onto which a changeover plug 12 can be plugged, from which several plug poles or pins protrude in accordance with the openings 11!

Instead of the changeover plug 12, a cubic motor protection module 13 can be plugged onto the socket part 10 of the terminal box 7, on which connecting pins for the openings 11 protrude in the same way as on the plug! The dimensions of the cross section of the motor protection module at right angles to the motor axis correspond approximately to the

Cross-sectional dimensions of the terminal box so that after connecting the motor protection module 13, the terminal box 7 and the module 13 act uniformly.

A socket part 14 protrudes from the front of the motor protection module 13, which corresponds in size and dimensions to the socket part 10, so that the switchover plug 12 can be plugged onto the front of the socket part 11l. In this case, the motor protection module is located like a sandwich between the switchover plug 12 and the terminal box 7.

The motor protection module preferably responds to overcurrent, whereby the response sensitivity varies depending on the speed level. In addition, the motor protection module can also have a triggering device for an overtemperature sensor. The motor protection module can be used for both alternating current and three-phase motors and, as a further alternative, has an on and off switch 15. The motor protection module can also have a

&zgr;&sgr; Re-closing of the circuit breaker after a fault and additionally or alternatively have a direction of rotation indicator for the motor.

Claims (8)

COHAUSZ & FLORACK PATENTAN LAW OFFICE SCHUMANNSTR. 97 D-4000 DÜSSELDORF 1 Telephone: (02111 683346 · Telelax (0211) 6790871 ■ Telex: 8586513 cop a PATENT ATTORNEYS: D'pl.-Ing. W COHAUSZ · DipL-lng. R KNAUF ■ DipL-lng. K B. COHAUSZ ■ DipUng. D. H WERNER · Dt rer. na. B. REDIES 08.05.1987 - 1 - HC/Sr 47081G C Expectations 1. Electric motor, in particular for pumps, with a Electrical connection module attached to the motor housing and a switch plug that determines the motor speed, characterized in that a module (13) having devices for motor protection is detachably attached between the connection module (7) and the changeover plug (12). 2. Electric motor according to claim 1, characterized in that the motor protection module (13) is attached to the connection module (7) via a plug connection having contacts and mating contacts. 3. Electric motor according to claim 1 or 2, characterized in that the plug connection between the connection module (7) and the motor protection module (13) is the same as the plug connection between the motor protection module (13) and the changeover plug (12). 4. Electric motor according to one of the preceding claims, characterized in that the motor protection module (13) responds to overcurrent, whereby the response sensitivity differs depending on the speed level* * I 4 * * *
it ti * * 5. Electric motor according to one of the preceding claims, characterized in that the motor protection module (13) comprises a triggering device for Overtemperature sensor. 5 6. Electric motor according to one of the preceding claims, characterized in that the motor protection module (13) for alternating current and Three-phase motors can be used. 10 7. Electric motor according to one of the preceding claims, characterized in that the motor protection module (13) has an on and off switch (15) . 15 8. Electric motor according to one of the preceding claims, characterized in that the motor protection module (13) has a restart switch of the circuit breaker after a fault. 20 I « J· I I