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DOL Starter
3TW7291-1A
For dependable service, it is of utmost
importance that instructions given below are
followed for selection, inspection, installation,
commissioning, operation and maintenance.
Raja
DOL Starter (Self reset)
+
Selection of Starter
• Refer Table A for recommended selection of 3TW72 starters.
Table A: kW/HP Rating, thermal overload relay range &
fuse rating, Coil Voltage, Maximum full load current for
different types of motors.
• Recommended Submersible pump rating 5.5kW/7.5HP Max.
3
Fig. 1: DOL Starter
12
13
6
1
7
2
4
5
Fig. 2: Starter Inside View
Installation, Operation & Maintenance
Instructions
Please read and understand these instructions before
installating, operating, or maintaining the equipment. Keep for
future reference
Danger
Hazardous voltage can cause death or serious injury. Disconnect
power before working on equipment.
Warning
Automatic Motor Restart.
Can cause death, serious injury or property damage.
Do not use automatic reset mode when unexpected automatic
restart of the motor can cause injury to persons or damage to
equipment.
Reliable functioning of the equipment is only ensured with
certified components. Commissioning and maintenance by
qualified personnel only.
NOTICE
This product has been designed for environment A. Use of this product
in environment B may cause unwanted electromagnetic disturbances in
which case the user may require to take adequate mitigation measures.
IS/IEC 60947-4-1
4
1. 'ON' push buttons (green)
5
2. 'OFF' push button (red)
1
3. Cover fixing (Instrument Head) screws
4. Housing
5. Cover
2
6. Mechanical Latch (OFF push button) to be used for
preventing undesired ON operation of Starter
6
7. Name plate
7
3
8
11
9
10
1. Contactor
2. Overload Relay
3. Contact Block
4. Relay Dial
5. Red Knob
6. Contactor Incoming Terminal Screws
7. Contactor Outgoing Terminal Screws
8. Contactor actuating green button
9. Wiring diagram Label
10. Links
11. Gasket
12. Grommet
13. Mounting Screw hole
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Related Manuals for Siemens DOL 3TW7291-1A
Summary of Contents for Siemens DOL 3TW7291-1A
- Page 1 Installation, Operation & Maintenance Instructions DOL Starter Please read and understand these instructions before installating, operating, or maintaining the equipment. Keep for future reference 3TW7291-1A Danger Hazardous voltage can cause death or serious injury. Disconnect For dependable service, it is of utmost power before working on equipment. importance that instructions given below are Warning followed for selection, inspection, installation, Automatic Motor Restart. Can cause death, serious injury or property damage. commissioning, operation and maintenance.
- Page 2 Installation: – Switch ‘OFF’ the starter by pressing the red push button (marked ‘O’) (Fig. 1) on the starter cover. • Remove the Front cover. • Reset Operation • Fix the starter housing vertically on a rigid surface free from vibrations. – If the overload relay trips, it resets automatically. (*Allow a reset time of approx. 4 min.) • Remove the rubber Grommets for incoming and outgoing cable Connections. (Fig. 2) • Connect incoming and outgoing cables as follows: Maintenance: (Fig. 2) • Switch off the starter and disconnect the main supply – Select correct size of cable from Table-A. by switching the main switch before doing any – Remove approx. 10mm of insulation. maintenance. – Pass the cable through proper cable gland to avoid • Keep the interior dust free. ingress of material. • Re-tighten the terminal screws from time to time. – Connect the cables and tighten the screws firmly. • No maintenance is needed for overload relay. Please do (Terminal Screws: M4, Tightening Torque: 80-110 not open the relay.
- Page 3 Contactor outgoing terminals Hook on relay for engagement Fig. 3: Contactor – Relay Connection Replacement of coil Table A: Motor Relay 3UW51 Back-up Fuse Rating Max. Full Load Current (Amp) Rating At 415V 3ph 50Hz Cable 3Ph, 415V, Starter Type HRC 3Ph, 415V, 1Ph, 240V, 4P Squirrel CSIR or Code type Submersible size Range Rewirable Cage IS Split-Phase IS 3NA motor IS 8789:1996 996-1979 9283:1995 Table 4...
- Page 4 Dimensional Drawing Raja Direct On-Line Starter Mounting dimensions 154 x 70 mm and hole dia 6.5 mm Disposal Siemens products are environment friendly, which PLASTICS: Segregate as per material type for recycling predominantly consist of recyclable materials. through authorized dealer. Because of the long lifetime of For disposals we recommend disassembling and separation Siemens Products the disposal guidelines may be replaced into following materials: by other national regulations when taking the product out of service. The local customer care service is available at any METALS: Segregate into Ferrous types for recycling through time to answer disposal-related questions. authorized dealer. Customer Care Toll free no. 1800 220 987 Email: ics.india@siemens.com Order No. A5E41695269000A-AB SACHIN ENTERPRISE Siemens Ltd. Product development is a continuous process. Consequently the data indicated in this Leaflet is subject to change without prior notice. For latest issue contact our sales offices.