Motor Company Warehouse SDS075OC400V10 User manual

Open Chassis Star-Delta Starter User Guide
(
7
.5kW~9
0
kW)
V
.
0.1

SDS Open Chassis Star-Delta Starter User Guide
Contents
1 Safety information ................................................................................ 1
2 Technical Data ...................................................................................... 2
3 Supply & Motor Connections & Circuit Diagrams ............................... 5
4 Control Connections & Operation ....................................................... 8
www.motorcontrolwarehouse.co.uk
Copyright © Motor Control Warehouse October 2017
Revision 2.0.0

Open Chassis Star-Delta Starter User Guide P a g e | 1
1
Safety information
Safety Information
This chapter provides very important information so that you can use the SDS Open Chassis Star-Delta Starter
safely, prevent injury or death, or damage to equipment. Please read this information thoroughly and make
sure you observe all the safety information shown below and elsewhere in this manual. Please make this User
Guide available for the end user.
Safety symbols
•The SDS Open Chassis Star-Delta Starter should ONLY be installed, commissioned and maintained by
ualified and competent personnel.
•The OC SDS must be installed to the latest IEE wiring regulations taking into account local
regulations.
•Dangerous voltages are present when the input power supply is connected to the OC SDS. Before
attempting any work on the OC SDS or motor, isolate and lock off the input power supply. Prove
dead using a voltage tester. The voltage tester itself should be proved immediately before and after
testing using a proving unit with a low power output.
•The OC SDS backplate must be connected to system ground using the earth terminals. The size of
the earth conductor and earth loop impedance must comply with national and local electrical
regulations.
•The SDS is a non-field repairable unit. Contact the supplier of the SDS.
•The mains supply and control supply to the OC SDS must be protected by suitable rated
fuses/MCBs.
•All machinery, in which this OC SDS is used, within the European Union, must comply with directive
98/37/EC, Safety of Machinery.
•Do not install the OC SDS in an explosive environment.
•The motor must be used within the manufacturers guidelines.
•Do not allow conductive material to enter the components within the OC SDS, e.g. from drilling
during installation.
anger of electrical shock which can cause injury or death, or damage to equipment
Danger
:
Warning:
Potential hazard, other than electrical, that can cause physical injury or damage to equipment
Danger
Warning

P a g e | 2 Open Chassis Star-Delta Starter User Guide
2
Technical Specification
Technical data
Trip Class 10
Model kW
rating
Input
phase
Input
voltage
(VAC
Max allowed
motor current
(A
Motor current (A
(overload range
Trip Class 10
Overload range
(A
Typical
Motor
(A
SDS075OC400V10 7.5 3 400 17 15.5 to 22 9 to 13 16
SDS11OC400V10 11 3 400 22 20 to 31 12 to 18 20
SDS15OC400V10 15 3 400 29 29 to 43 17 to 25 27
SDS185OC400V10 18.5 3 400 36 29 to 43 17 to 25 34
SDS22OC400V10 22 3 400 44 39.5 to 55 23 to 32 41
SDS30OC400V10 30 3 400 59 52 to 69 30 to 40 55
SDS37OC400V10 37 3 400 75 63 to 86 37 to 50 72
SDS45OC400V10 45 3 400 89 82 to 112 48 to 65 86
Trip Class 20
Model kW
rating
Input
phase
Input
voltage
(VAC
Max allowed
motor current
(A
Motor current (A
(overload range
Trip Class 20
Overload range
(A
Typical
Motor
(A
SDS075OC400V20 7.5 3 400 17 15.5 to 77 9 to 45 16
SDS11OC400V20 11 3 400 22 15.5 to 77 9 to 45 20
SDS15OC400V20 15 3 400 29 15.5 to 77 9 to 45 27
SDS185OC400V20 18.5 3 400 36 15.5 to 77 9 to 45 34
SDS22OC400V20 22 3 400 44 15.5 to 77 9 to 45 41
SDS30OC400V20 30 3 400 59 31 to 155 18 to 90 55
SDS37OC400V20 37 3 400 75 31 to 155 18 to 90 72
SDS45OC400V20 45 3 400 89 31 to 155 18 to 90 86
SDS55OC400V20 55 3 400 108 31 to 155 18 to 90 98
SDS75OC400V20 75 3 400 135 31 to 155 18 to 90 129
SDS90OC400V20 90 3 400 170 103 to 206 60 to 120 158
NOTE: The thermal overload etting i et to minimum a default. It hould be adju ted to uit the motor
u ed.
To calculate the thermal overload etting = Actual motor nameplate current ÷ 1.7 x 1.1 (10% afety margin to
prevent puriou tripping).
NOTE: Due to the large range of the thermal overload on the Trip Cla 20 tar delta tarter , plea e make
ure the thermal overload i adju ted correctly to uit the motor.
NOTE: Starting the motor more than once every 10 minute will alter the thermal overload tripping
characteri tic by heating the current en ing element , making the overload trip more quickly for a given
etting.

Open Chassis Star-Delta Starter User Guide
P a g e | 3
2
Technical Specification
Approvals CE approval
Environment
Altitude
1000m rated
1000m ～ 3000m, 1% rated current de-rating per
100m above 1000m
Operating Temperature −10°C
～ +40°C
Max. Humidity ≤90%RH, non-conden ing
Vibration ≤5.9m/
2
(0.6g)
Storage Temperature −40°C
～ +70°C
Running Environment
Non-flammable, No corro ive ga e , no
contamination with electrically conductive
material
Supported Power Supply Systems TT & TN
OC SDS Enclosure IP20 (mu t be in talled in an enclo ure)
Supply frequency 50 to 60Hz
Supply voltage 3 pha e 400VAC ±10%
*Contactor coil voltage 400VAC / 240VAC / 110VAC (+/-10%)
*Model dependant
OC SDS Dimensions
Model Dimensions
(H x W x D
Trip Class 10
Dimensions
(H x W x D
Trip Class 20
Approx.
Weight
(kg
SDS075OC400V 170 x 180 x 170 170 x 180 x 170 2.2
SDS11OC400V 170 x 180 x 170 170 x 180 x 170 2.2
SDS15OC400V 200 x 300 x 190 200 x 300 x 190 5
SDS185OC400V 200 x 300 x 190 200 x 300 x 190 5
SDS22OC400V 200 x 300 x 190 200 x 200 x 200 5
SDS30OC400V 200 x 320 x 200 200 x 320 x 200 5
SDS37OC400V 200 x 320 x 200 200 x 320 x 200 5
SDS45OC400V 200 x 320 x 200 200 x 320 x 200 5
SDS55OC400V 200 x 320 x 200 5
SDS75OC400V 350 x 480 x 150 10
SDS90OC400V 350 x 480 x 150 10
NOTE: The above dimen ion are only approximate and do not take into account the ize of the thermal
overload on the trip cla 20 tar delta tarter .
NOTE: The contactor et between the Trip Cla 10 and Trip Cla 20 open cha i tar delta tarter may differ
hence the phy ical ize of the trip cla 20 may be larger than the equivalent trip cla 10 model.
NOTE: The open cha i tar delta tarter are upplied pre-wired on a back plate. The tarting and topping
method will need wiring into the tar delta tarter. See Control Connections & Operation ection of thi U er
Guide for example connection .
NOTE: The thermal overload i fitted into the output of the main contactor on the Trip Cla 10 product. The
Trip Cla 20 thermal overload i upplied a a eparate module which will need to be mounted eparately
from the contactor and wired into the output of the main contactor.

P a g e | 4 Open Chassis Star-Delta Starter User Guide
2
Technical Specification
SDS Trip Class
The MCW open cha i tar delta tarter are fitted with either a Trip Class 10 thermal overload relay a which
i uitable for the majority of light to medium indu trial type load application or a Trip Class 20 thermal
overload relay which i uitable for medium to heavy indu trial load .
The MCW tar delta tarter range i not uitable for application that have a very heavy load on tart that take
greater than 20 to tart or very high inertia load uch a high inertia fan , centrifuge or loaded cru her .
Starting the MCW tar delta tarter more than once every 10 minute will alter the thermal overload tripping
characteri tic making the overload trip more quickly for a given thermal overload current etting.
Trip Class Explained
At 600% of the maximum current rating of the motor the Trip Class 10 unit will trip in 10 econd or le , Trip
Class 20 will trip in 20 econd or le , and Trip Class 30 will trip in 30 econd or le .
The cla number indicate the thermal overload trip characteri tic from cold tate.
Ir = Current etting of overload relay. Thi hould be the Full Load Current (FLC or FLA) hown on motor rating
plate.
1.05 x Ir 1.2 x Ir 1.5 x Ir 7.2 x Ir
Time to trip from a cold start
Trip Class 10 >2 hour <2 hour <4 minute 2 < to <10
Trip Class 20 >2 hour <2 hour <8 minute 2 < to <20
Trip Class 30 >2 hour <2 hour <12 minute 2 < to <30
NOTE:
The open cha i tar-delta tarter can only be u ed with motor which have 400V delta and 690V tar
winding .
They cannot be u ed with motor that have 200V delta and 400V tar winding .

Open Chassis Star-Delta Starter User Guide
P a g e | 5
3
Supply & Motor Connections
Open Chassis SDS Circuit diagram with Main and Star contactors closed
This is equivalent to connecting the motor in the star 690V configuration. This is the start configuration for the
motor. This configuration draws less current from the mains supply during starting then if the motor was
started in the delta configuration.
L1 L2 L3
Main contactor -
Closed
Star contactor -
Closed
Delta contactor -
Open
400V 3 phase mains supply Input
Connect to top of main contactor)
U1 V1 W1 V2 U2W2
U1
V2W1
U2
V1
W2
Motor terminal box
U1
V2W1
U2
V1
W2
400V 3 phase mains
supply
L1
L2
L3
Equivalent to -
Star point
U1 V1
W1
V2
U2
W2
L1
L2
L3
Thermal
Overload
The motor cables
should be connected to
the open chassis SDS
star and delta
contactors as per the
diagram
Connect to delta
contactor output
Motor terminals connected in star Star winding connection
NOTE: Please remember to remove the shorting bars from the motor terminals as these are not required with
a star delta starter.

P a g e | Open Chassis Star-Delta Starter User Guide
3
Supply & Motor Connections
Open Chassis SDS Circuit diagram with Main and Delta contactors closed
This is equivalent to connecting the motor in the delta 400V configuration. The delta connection is the running
connection for the motor.
L1 L2 L3
Main contactor -
Closed
Star contactor -
Open
Delta contactor -
Closed
400V 3 phase mains supply input
Connect to top of main contactor)
U1 V1 W1 V2 U2W2
U1
V2W1
U2
V1
W2
Motor terminal box
U1
V2W1
U2
V1
W2
400V 3 phase mains
supply
L1
L2
L3
Equivalent to -
U1
V1
W1
V2
U2
W2
L1
L2
L3
Thermal
Overload
The motor cables
should be connected to
the open chassis SDS
star and delta
contactors as per the
diagram
Connect to thermal
overload output
Connect to delta
contactor output
Motor terminals connected in delta Delta winding connection
NOTE: Please remember to remove the shorting bars from the motor terminals as these are not required with
a star delta starter.

Open Chassis Star-Delta Starter User Guide
P a g e | 7
3
Supply & Motor Connections
Open Chassis SDS Circuit diagram Example (400VAC control)

P a g e | 8 Open Chassis Star-Delta Starter User Guide
4
Control Connections & Operation
Control Connections
The following drawings give examples of how to connect volt free contacts, switches or push
buttons to control the starting and stopping of the open chassis star delta starter.
Small Open Chassis Star-Delta Starter WITH Aux Contact Block on Contactor 3
•Controlled by an external normally open relay contact
•Controlled by external Start/Stop buttons
Large Open Chassis Star-Delta Starter WITHOUT Aux Contact Block on 3
•Controlled by an external normally open relay contact
External
control relay
Thermal O/L
relay
(95) (96)
L1
L2/N
K2 (21) or K1
Timer (56)
Contactor A1 (common of K1 K2 K3)
Connect a wire between K1 Timer (55) and K1 NO (13)
K1 Timer (55

Open Chassis Star-Delta Starter User Guide P a g e | 9
•Controlled by external Start/Stop buttons
75kW & 90kW Open Chassis Star-Delta Starter
•Controlled by an external normally open relay contact
External
control relay
Thermal O/L
relay
(95) (96)
L1
L2/N
K2 (21) or K1
Timer (56)
Contactor A1 (common of K1 K2 K3)
Connect a wire between K1 Timer (55) and K1 NO (163)
•Controlled by external Start/Stop buttons
K1 Timer (55

P a g e | 10 Open Chassis Star-Delta Starter User Guide
4
Control Connections & Operation
Operation
When start button/switch is pressed on the star-delta contactors will initiate starting the motor.
The ‘Main’ and ‘Star’ contactors will pull in. The supply voltage (400VAC is connected across the
star connected motor. Because the motor is connected in star which is the 690V winding but with
only 400V across it, the current the motor draws during starting will be reduced. After the time
delay of the timer elapses, the ‘Star’ contactor will drop out and the ‘Delta’ contactor will pull in.
Now the motor will be connected in its delta (running winding with 400V across its windings.
Timer Setting
The timer setting is dependent on the driven load and inertia and can be determined as follows:
There are two basic ways of determining the correct point at which the timer should change the
winding configuration from 'star' (starting mode to 'delta' (running mode . Both methods determine
the point at which the rotor has achieved its maximum speed in star, and therefore the point at
which the starter should change to delta.
Current measurement method
Set the delta timer to its maximum setting. Put a clip-on ammeter on one of the lines FEEDING the
starter. Set a stopwatch going when you press the start button. Watch the ammeter - it will peak
immediately on start up, then the current will drop off as the load accelerates. As soon as the
current steadies off, stop the watch. At this point (approximately 85% full load speed the motor can
achieve nothing more by remaining in star, and this is the latest point in time that delta changeover
should be made.
Speed measurement method
Use a tachometer on the motor shaft (mechanical or optical to measure motor speed. Set the delta
timer to its maximum setting. Again, use a stop watch. Observe the Tacho. Acceleration
characteristics will vary dependent on the driven load, but the speed will settle out at approx. 85%
full load speed (this can usually be heard by the tone in the motor being constant . Stop the watch
at this point. Set the timer to the time recorded on the stop watch.

Open Chassis Star-Delta Starter User Guide P a g e | 11
NOTES
Date
Thermal Overload
Setting
……………………………………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………………………….
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……………………………………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………………………….

P a g e | 12 Open Chassis Star-Delta Starter User Guide
NOTES
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……………………………………………………………………………………………………………………………………………….
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……………………………………………………………………………………………………………………………………………….

Open Chassis Star-Delta Starter User Guide P a g e | 13
Other Enclosed Products from Motor Control Warehouse
•Enclosed Star Delta Starters, three phase input from 7.5kW to 110kW. Rated for
light to medium or medium to heavy industrial loads.
Features
IP65 Powder coated steel enclosure
Lockable panel door
Interlocked mains isolator
10kA MCBs or 80kA fuses on power
10kA MCBs on control
Tri rated cable
Motor outputs to terminals
Terminals for external stop/start Key
release E-Stop button
Adjustable changeover timer
Motor thermal overload relay (trip
class 10 or trip class 20

www.motorcontrolwarehouse.co.uk
Other Enclosed Products from Motor Control Warehouse
•Enclosed Inverter Drives, single phase input from 1.5kW to 4kW. Three phase input
from 0.75kW to 37kW.
•Enclosed Soft Starters, from 7.5kW to 55kW, three phase input. All these products
are rated at trip class 10 (medium industrial loads .
Features
IP54 powder coated steel enclosure
Interlocked mains isolator
10kA MCBs – power & control
Tri rated cable
Keyed Inverter Disable button
IP rated speed pot
Motor connections to terminals
Fwd/Rev switch
Stop/Start buttons
Indication lamps
Thermostat controlled cooling fans
HD700 industrial inverter
Features
IP65 Powder coated Steel enclosure
10kA MCBs – power & control
Interlocked mains isolator
Motor thermal overload relay
Internal bypass contactor
Stop/start pushbuttons
Keyed soft stop button
Running and healthy lamps
Customer terminals
24Vdc power supply
Tri rated cable
Fairford Electronics DFE Soft Start