Siemens Agriculture Starter complying to latest standards User Manual

Agriculture Starter complying
to latest standards

Automatic Star Delta Starters IEC 60947-4-1:
2012 Compliant

Direct-on-Line Starters ISI Marked-BIS Approved

www.siemens.co.in

Tried, Tested and Trusted Start with Siemens Agriculture
Starters

For more than 125 years, Siemens has been developing and manufacturing world-class, control

products. Siemens offers a wide range of starters to cater to diversied demands from Agriculture

Sector .These products are specially designed to provide smart, easy and reliable motor starting
solution.

They employ tried and tested Siemens contactors and relay and this ensures the right start for motors
requiring direct online starting or star delta starting.

2

Direct on Line Starter (DOL) RAJA

3TW7291-1A...

Range: 0.25kW to 7.5kW

0.33HP to 10HP

Method of starting

A. DOL starting method:

+

The most economical and popular method of starting squirrel cage induction motors, is direct-on­line, where the starter is connected directly across the supply. However, the starting current at the
moment of switching Direct-on-line can be as high as 6-8 times the rated current.

Advantages:

High starting torque, shorter starting time, simple construction and wiring, space saving etc.

Disadvantages:

High starting current

Applications:

DOL: As we know, A direct on line starter can be used if the high inrush current of the motor does
not cause excessive voltage drop in the supply circuit. It can be used to start small agriculture water
pumps, compressors, fans and conveyor belts etc.

3

Construction

Availability of Agriculture starters in new design: DOL - 15th Dec. 2020 | ASD - 15th Feb. 2021

Contactor:

The DOL starter up to 10 HP is tted with 3TS3 Contactor. This contactor is specially designed by
Siemens considering the requirements of industry as well as agriculture. Considering the specic

need of the agricultural pump set applications, Siemens has designed a special wide band coil

(200- 400V). This coil operates reliably even when there is wide voltage uctuation.

The Starters will now come with 3TS Contactors which will in turn make the starter more reliable

with enhanced electrical and mechanical life.

4

Bimetal Overload Relay:

The RAJA direct-on-line starter is tted with 3UW5 relay. These relays are computer calibrated and
therefore, offer accurate protection. The main benet of this bimetal relay is the built-in single

phasing protection in addition to the overload protection. Relay has Automatic reset function after
cooling time of 4 sec approx, completely reduce Manual dependency.

Push buttons

Push buttons are used for switching ‘ON’ and ‘OFF’ the starter. Twin push button comes with ‘Locked
Off’ feature which helps in avoiding nuisance switching ON of pump.

Operation:

In DOL starting, the ‘ON’ push button is pressed, which energizes the contactor coil, thus switching

on the circuit. When the OFF’ push button is pressed, the contactor is de-energized, switching off

the circuit. The bimetal relay under normal functioning of motor plays no active part in the starter.
But under overload, single phasing or locked rotor conditions of Motor, the bimetal relay cuts-off
the supply to the contactor coil, tripping the circuit. The contactor itself provides the necessary ‘no­voltage’ protection in so far as it will drop out in the case of a supply failure, and for restarting on
resumption of supply, the ‘ON’ push button will have to be pressed again.

Reliability:

• 3TW72 range of DOL starters are having option of 200-400 V Coil voltage which takes care of wide
uctuations in supply.

• Accurate protection under single phasing & overload.

• With ISI marking, it ensures more safety for the end user.

• With 3TS contactors tted into it, ensures more electrical and mechanical life of the Starter.

• With Locked off feature, ensures that undesirable switching on of the Starter is prohibited.

• No Auto start only Auto reset of Bimetal relay and it needs Manual Acknowledgement to again

ON the Starter.

5

Key Highlights

Latched OFF feature

available

Fitted with 3TS

Contactors and 3US

over load relays

RAJA Starter with

ISI mark

6

Technical Details of the Starter

Table A:

Motor

Rating

At 415V

3ph 50Hz

Starter Type Contactor

HP kW Range

0.33 0.25 3TW72 91-1A* 64 3TS3010-0A##08KA0 0.63-1 0J 2A 36 SWG 1 - - 3.8

0.75 0.55 3TW72 91-1A* 66 3TS3010-0A##08KA0 1-1.6 1A 6A 34 SWG 1 1.7 - 7

1 0.75 3TW72 91-1A* 68 3TS3010-0A##08KA0 1.6-2.5 1C 6A 27 SWG 1 2.2 - 7

1.5 1.1 3TW72 91-1A* 69 3TS3010-0A##08KA0 2-3.2 1D 10A 26 SWG 1 2.9 3.25 13

2 1.5 3TW72 91-1A* 71 3TS3010-0A##08KA0 3.2-5 1F 16A 25 SWG 1 3.8 4.5 18

3 2.2 3TW72 91-1A* 72 3TS3010-0A##08KA0 4-6.3 1G 16A 24 SWG 1.5 5.1 6.5 -

5 3.7 3TW72 91-1A* 74 3TS3010-0A##08KA0 6.3-10 1J 16A 21 SWG 1.5 8.1 10 -

7.5 5.5 3TW72 91-1A* 75 3TS3210-0A##08KA0 8-12.5 1K 25A 19 SWG 1.5 11.4 14.5 -

7.5 5.5 3TW72 91-1A* 77 3TS3210-0A##08KA0 10-16 2A 25A 18 SWG 2.5 - - -

10 7.5 3TW72 91-1A* 78 3TS3210-0A##08KA0 12.5-20 2B 32A 18 SWG 4 15.4 19.5 -

Relay 3UW51

Code

* Code for operating coil voltage, 50 Hz (B for 200-400V, W for 415V)
## Code for operating coil voltage, 50 Hz (Z6 for 200-400V, R0 for 415V)

##

Back-up Fuse

Rating

HRC
type

Rewirable

3NA

7

Cu

Cable

(mm2)

size

Max. Full Load Current (Amp)

3Ph, 415V,

4P

Squirrel

Cage IS

8789:1996

Table 4

3Ph, 415V,

2P Sub­mersible
motor IS

9283:1995

Table 2

1Ph, 240V,

CSIR or

Split-

Phase IS

996-1979

Table 9

Spare list

Sr.

No.

1

2

3

4

5

6

7

8

9

# – contact sales

Description Order No.

Contactor for 200-400V 3TS30-10-0AZ608K

Contactor for 200-400V 3TS32-10-0AZ608K

Contactor for 415V 3TS30-10-0AR008K

Contactor for 415V 3TS32-10-0AR008K

Relay 3UW51 02-##

Coil for 200-400V 3TY7 403-0AZ6

Coil for 415V 3TY7 403-0AR0

1NO Contact Block 3SB54200B

‘ON’ & ‘OFF’ Push Button #

Raja+ Direct-on-line Starter

(For Single Phase connection)

Wiring Diagram for Single-Phase Motors

Note: Connect 3/L2 to 2/T1 by cable of suitable size. (Max. 4mm2)

7

Automatic Star Delta Starter 3TE7291-0A

ASD-11 Starter (Self reset)

Range: 7.5kW to 18.5kW

10HP to 25HP

Iy = Current in Y-connection
ID = Current in ∆ connection

Current/rated op. current

Synchronous speed

Speed/rated speed

In star delta starting, initially the motor windings are connected in star. This reduces the starting

current by 1/3 rd of the full load current also the voltage by (1/√3) of the rated value. As the torque is
proportional to the square of the voltage, the starting torque also get reduced to 1/3rd of it’s full load

value. Once the motor attains approximately 80% of the rated speed, the windings get connected in
the delta formation.

Thus by star delta starting, the starting current is reduced to 2 to 2.5 times the rated current unlike

DOL starting, where it is 7 to 8.

Advantages:

low starting current

Disadvantages:

Low / medium starting torque, longer starting time, less simpler construction and wiring, requires

more space etc.

8

Construction

Automatic Star Delta Starters tted with 3TS contactors

Availability of Agriculture starters in new design: DOL - 15th Dec. 2020 | ASD - 15th Feb. 2021

Construction:

It consists of a star-delta timer (3RP), contactor (3TS3), and overload relay (3UW51).

Operation:

In this starter, the changeover from ‘star’ to ‘delta’ is done automatically after a preset time by using a
timer.

9

Key Highlights of Star Delta Starter

Latched OFF feature

available

Fitted with 3TS

Contactors

Compact Size

10

Technical Details of Automatic Star Delta Starter

Table A: Automatic Star - Delta Starter Type Ref: 3TE7291-0A

I()

4 Pole

Motor

Output

415V

(kW/HP)

7.5/10 16 9.2 3TS32 10-0A*08K 3TS32 01-0A*08K 3TS32 10-0A*08K 3UW51 02-1J 6.3-10 3KL812 20 2.5 1.5

9.3/12.5 19.5 11.2 3TS32 10-0A*08K 3TS32 01-0A*08K 3TS32 10-0A*08K 3UW51 02-1K 8-12.5 3KL812 25 4 2.5

11/15 23 13.2 3TS32 10-0A*08K 3TS32 01-0A*08K 3TS32 10-0A*08K 3UW51 02-2A 10-16 3KL812 25 4 2.5

15/20 32 18.4 3TS33 00-0A*08K 3TS33 00-0A*08K 3TS32 10-0A*08K 3UW52 02-2B 12.5-20 3KL812 50 10 4

18.5/25 38.5 22.2 3TS33 00-0A*08K 3TS33 00-0A*08K 3TS32 10-0A*08K 3UW52 02-2C 16-25 3KL812 50 10 4

* Code for operating coil voltage 50 Hz (Z6 for 200-400V, R0 for 415V)

Squirrel

cage

Line

cur-

rent

(A)

motor

Phase

at

Contactor Line Contactor Delta Contactor Star

cur­rent

(A)

Type Reference Type - Code

Other Tables:

Star-Delta Timer:

AC Input Voltage MLFB

230V-400V
380V-440V

3RP15 76-1NP20 8K

3RP15 76-1NM20 8K

Sr.

No.

Recommended

Overload relay at 50ºC

Relay

Range

(A)

Recommended

Fuse Switch

Back up

Type

HRC

fuse

rating(A)

Spares:

Description Order No.

1 Contactor for 200-400V 3TS30-10-0AZ608K
2 Contactor for 200-400V 3TS32-10-0AZ608K

Recommended

Cu

Cable size

(mm2)

Incom-

supply)

ing

(from

Outgo-

(tomo-

3 Contactor for 415V 3TS30-10-0AR008K
4 Contactor for 415V 3TS32-10-0AR008K
5 Relay 3UW51 02 Refer Table A
6 Relay 3UW52 02 Refer Table A

7 Coil for 200-400V 3TY7 403-0AZ6
8 Coil for 415V 3TY7 403-0AR0
9 1NO Contact Block 3SB54200B

10 ‘ON’ & ‘OFF’ Push Button #

# – contact sales

ing

tor)

11

Single Line Diagrams:

DOL (Direct online starters)

Raja+ Direct-on-line Starter (For Single Phase connection)
3TW72 91-1A

Wiring Diagram for Single-Phase Motors

Note: Connect 3/L2 to 2/T1 by cable of suitable size. (Max. 4mm2)

S0 - OFF “O” (red) Button
S1 - ON “I” (green) Button

Q1 - Contactor

K1 - Bimetal Relay with SPP feature

12

ASD (Fully Automatic Start Delta Starters)

Q1 - Line Contactor (+2NO)
Q2 - Star Contactor (+1NO+1NC)
Q3 - Delta Contactor (+1NC)

S1 - ON Push Button
S4 - OFF Push Button
Q4 - Star Delta Timer with 1NO
Instantaneous and 1NO

Delayed Aux. Contact

K1 - Bimetal Relay

From Supply

L1 L2 L3

3

S1

4

Q4

A1/A3

Q2

A1

1/L1

3/L2

17

A22818A2

5/L3 21 13

2/T1

Q3

A1

1/L1

3/L2

224/T2 6/T3

14

A2

2/T1

4/T2 22

W2 U2 V2

To Motor

Diagram shows connections made for contactor

coils operating range 200-400V 50Hz (wide band) &

coil rated 415V 50Hz.

(13), (14), (23), (24) applicable incase of 20 HP & 25 HP.

3TE72 91-0A / Automatic Star-Delta Starter
Coil Voltage / Coil Operating Range = V 50Hz

5/L3

21 A1

6/T3

A2

Q1

1/L1 3/L2 5/L3

K1

2/T1 4/T2 6/T3

U1 V1 W1

1/L1

2/T1

To Motor

3/L2

5/L3 13/

4/T2 6/T3

(23)

23/(13)

24/(14)

14(24)

S4

95

96

Motor Output at 415V

(kW/HP)

Relay Range

3UW51/52 (A)

Recommended Backup

Fuse type 3NA3(A)

Recommended Cu Cable (mm sq.)

Incoming Outgoing

7.5 / 10 6.3 - 10 20 2.5 1.5

9.3 / 12.5 8 - 12.5 25 4 2.5

11 / 15 10 - 16 25 4 2.5

15 / 20 12.5 - 20 50 10 4

18.5 / 25 16 - 25 50 10 4

13

DOL Dimensional Drawing

Raja Direct On-Line Starter

∅ 21

Cable entry
hole from rear

(120)

(70)

(41)

118 9

B

(210)

(25.3) (154)

B

∅ 25.5

Cable entry holes
at top and bottom

(17)

(32)

M4 Earthing screw
at top and bottom

Mounting dimensions 154 x 70 mm and hole dia 6.5 mm

14

ASD Dimensional Drawing

Automatic Star Delta Starter

Fig. 8: Dimensional Details for 3TE72 91-0A**

Mounting Dimensions 259 x 219 and hole Dia 7.0mm

15

Siemens Limited
Smart Infrastructure
Electrical Products

R&D Technology Centre

Thane Belapur Road, Airoli Node

Navi Mumbai - 400708

www.siemens.co.in

For more information call us on 1800 209 1800
For Life Cycle Support of Products, Systems and

Solutions call us on 1800 209 0987

Product upgradation is a continuous process. Hence, data
in this catalog is subject to change without prior notice.
For the latest information, please get in touch with our

Sales Ofces.