Three Phase Drum Starter

Construction of Drum Starters for Three-Phase Slip Ring Motors

Drum starters are built with smooth sheet steel or radiator oil containers according to the respective starting conditions. The starter is actuated with a handwheel in manual operation and with a geared motor for automatic drive. These starters equipped with contacts for continuous operation. Remote control is possible for the auomatic driven version.

Technical data

Characteristic values

degree of protection IP 41

Connection cross sectional area:

• to 100A: 10 - 50mm^²
• to 200A: 50 - 120mm^²
• to 400A: 120 - 2x185mm^² or 3x120mm²

Drawing

 

No. version	b1	b2	d1	d2	e1	e2	h1	h2	h3	l1	l2	l3
1540.50 1541.50	440	380	200	Pg48	285	385	655 -	- 770	- 480	360	520	- 710
1540.80 1541.80	516	455	200	Pg48	310	460	855 -	- 970	- 480	385	545	- 735
1540.150 1541.150	533	472	320	76	440	480	1050 -	- 1025	- 355	505	665	- 855
1540.250 1541.250	533	472	320	76	640	480	1050 -	- 1025	- 355	705	865	- 1055
1540.400 1541.400	653	592	320	76	640	600	1305 -	- 1280	- 355	705	865	- 1055

ADO with motor-drive

Description

• A1 Frequency converter (starting time setting and motor superversion)
• B1 Temperature controller for oiltemperature supervision (preset to 120°C)
• F1 Main fuse for frequency converter -A1
• M1 Servo-motor
• R1 Drum starter
• S1 Limit switch for position Rmax
• S2 Limit switch for position Rmin
• X1 Connection terminal (Voltage supply and control inputs and outputs)

Remarks:

Signals "Start" (X1-9/10) and "Stop" (X1-8/11) have to be active until the corresponding end position is reached. If it is necessary to change the preset starting time, read the operating instructions of the freqeuncy converter attentively.

Principle-diagram of connection for three phase drum type rotor starter

• S1 "OFF"-push-button
• S2 "ON"-push-button
• K1 stator contactor
• F1, 2} fuses
• K2 timing relay
• S3, 4} auxiliary contacts

This example diagram belongs to type ADO 3 - 100 and ADO 4 - 100

Application

The three-phase drum starters are suitable exclusively for starting three-phase slip ring motors. The starters can be used for up to 410 kW under full load.

Mode of functioning

When actuating the handwheel or the switch of the auxiliary motor, starting will be done by short - circuiting the resistances by means of the switch drum and the contact fingers. The starting resistor will then short- circuited unsymmetrically and intermittently. The terminals of the rotor lines are short-circuited in the limit position. These connections and contacts are designed for continuous operation. Cooling and dissipating the heat generated when starting occurs via the oil.

Construction

The three-phase drum starter includes oil box, sarting resistor and switch drum with actuating members. The oil box is a welded steel sheet metal structure. The oil is drained from the oil box via an oil drain plug.

Starting resistor types ADO 5 to 7 are made of freely suspended resistance wire spirals but types ADO 3 and 4 of spirals wound onto ceramic cylinders. A switch drum with sliding contact fingers is used as the circuit element. The starter is actuated by hand via the handwheel or by a gear motor in case of automatic drive. Safe arresting of the individual switch positions is reached via an arresting facility. The appropriate switch position can be seen at the handwheel or at the pointer arranged at the switch drum shaft. All starters are equipped with zero and final position interlocking contacts. In addition, starters with motor drive are provided with an auxiliary contact which operates the main contactor or, if necessary, an auxiliary contactor.

Transformer oil should be used as oil filling which must cover all parts fully which may generate heat or switching arcs. The oil level can be checked at the oil sight glass. The rotor line is inserted in the terminal box by means of cable end boxes or a screwed cable connection. These are also provided for auxiliary or control lines. The terminal box is closed by a sheet metal cap. All auxiliary and control lines of starters with motor drive are accommodated in a commons switch box beside the motor attachment.

Assembly and maintenance

In order to ensure proper heat dissipation, the three-phase drum starters should be arranged so that a clear distance of 0,3 m is kept at all sides. Depending on the field of use and the conditions of opera tion, the starters should be maintained at regular intervals. To do so loosen the cover screws and disconnect the connection. Now the complete switching insert can be taken out of the oil box.

When doing maintenance work check the copper contacts of the contact fingers and the copper lining of the drum for wear and burning off. Remove blowpipe beads. Clean burnt off points, replace defective copper linings and contacts by new contacts. Check the 3 mm stroke of the contact fingers by turning the drum, re-adjust, if necessary, by means of the set screw. Use the square (width across flats 22 at the shaft end above the switch position indicator ) for actuating the drum of starters with motor drive. Ensure free motion and good springing of the contact fingers. The oil level must always be visible at the sight glass. Top up transformer oil, if necessary, at the filler neck provided in the cover. Maintenance work should not be done unless the starter is disconnected from the mains completely.

Instructions: Motor starter DIN 57660 bzw. VDE 0660 Protection mode: DIN VDE 0470 bzw. EN 60529

THE FOLLOWING SERIES FABRICATION TYPES ARE AVAILABLE:

Three Phase Drum Starter bis 410 kW

• easy maintenance
• sturdy design
• Safe in operation
• Motor drive or manual drive
• remote control
• Self cooling
• For starting
• Continuous operation

Our further deliver program

• Three - Phase liquid rotor starters
• Industrial switches