Cutler-Hammer
Reduced Voltage Motor Control
Motor Starters – NEMA Magnetic
January 1999
J4-1
General Description
Starter Selection Guide
than one type starter will meet the application
requirements, reference to the table below will
show which starter is best suited for the application.
In general, the application will determine the
type of starter required. In cases where more
Starter Type
Starting Characteristics Expressed in % of
Rated Values (Approx.)
Motor
Voltage
Remarks
Motor
Current
Line
Current
Torque
80
65
50
80
65
50
67➀
45➀
28➀
64
42
25
The adjustable voltage taps permit wide adjustment of characteristics
in the field.
Part Winding
Class ECA45
100
65
65
50
Requires part winding closed transition motor. A nine-lead 230/460-volt dual
voltage motor may be used in 230-volt applications. Closed transition.
Wye-Delta
Class ECA48
Class ECA51
100
33
33
33
Requires delta wound motor with wye connections. Ideal for long accelerations.
Closed transition is available.
Autotransformer
Class ECA42
80% Tap
65% Tap
50% Tap
General Application
The following factors should be considered
when applying reduced-voltage starters to a
squirrel cage motor-driven load.
1. The motor characteristics which will satisfy the starting requirements of the load.
2. The source of power and the effect the
motor starting current will have on the
line voltage.
3. The load characteristics and the effect the
motor starting torque will have on the
driven parts during acceleration.
The starter protection required to protect
the load, motor, starter, cables and power
source during overload, undervoltage and
fault conditions.
A typical NEMA B motor started with full voltage will develop as much as 150% full-load
torque when started with a starting current of
around 600% full-load current. These values
may exceed the mechanical limitations of the
load or electrical limitations of the source,
or both.
A reduced-voltage or reduced-inrush starter
will reduce both starting current and starting
torque. Care must be taken when meeting
power company limitations that the motor
will produce sufficient torque to accelerate
the load to near rated speed.
Part-winding starters are suited to low starting torque loads such as fans, blowers and
m-g sets. Autotransformer starters should be
used with “hard to start” loads such as reciprocating compressors, grinding mills, and
pumps. Wye-Delta starters are applicable to
high inertia loads with long acceleration
times which as centrifugal compressors
and centrifuges.
All starters, in addition to overload protection,
will provide either low-voltage release or
low-voltage protection depending upon the
pilot device used with the starter. Low-voltage
release, where power is applied to the motor
after a power failure, can be obtained by using
a 2-wire pilot device (temperature, switch,
etc.). Low-voltage protection, where power is
not applied to the motor after a power failure
until restarted by an operator, can be obtained by using 3-wire control such as START
STOP push buttons.
Closed transition Wye-Delta types require
adequate ventilation to remove resistor heat.
Cutler-Hammer also offers a line of solidstate reduced-voltage starters known as
Easy-start.
Solid-state starters are ideally suited for
many loads including conveyor applications
since they provide controlled acceleration
from zero to full load.
UL Listing – Combination E176513,
Non-Combination E19224
J
Starting Characteristics
500
400
300
100
Autotransformer
Starting on 65% Tap
Full Load Current
0
Motor Speed
Full Load
Speed
Autotransformer Starting
➀ Includes autotransformer magnetizing current.
CAT.71.01.T.E
Full Voltage Starting
600
500
Part Winding Starting
400
300
Wye-Delta Starting
(Closed Transition)
200
Full Load Current
100
0
Motor Speed
Wye-Delta or Part Winding Starting
Full Load
Speed
Line Current, % of Full Load
600
Line Current, % of Full Load
Line Current, % of Full Load
Full Voltage Starting
200
700
700
700
600
500
400
300
KVA
200
100
0
Torque
20
Motor Speed
Solid-State Starter
40
60
80
100
Full Load Speed
J4-2
Cutler-Hammer
Reduced Voltage Motor Control
Motor Starters – NEMA Magnetic
January 1999
Part-Winding Type
Description
Part-Winding starting provides convenient,
economical one-step acceleration at reduced
current where the power company specifies a
maximum or limits the increments of current
drawn from the line. These starters can be
used with nine-lead dual-voltage motors on
the lower voltage and with special partwinding motors designed for any voltage.
When used with dual-voltage motors, it
should be established that the torque produced by the first half-winding will accelerate
the load sufficiently so as not to produce a
second undesirable inrush when the second
half-winding is connected to the line. Most
motors will produce a starting torque equal to
between 1/2 to 2/3 of NEMA standard values
with half of the winding energized and draw
about 2/3 of normal line current inrush.
Opening the STOP button or other pilot
device de-energizes contactors (1M), (2M)
and timer (TR), removing the motor from
the line.
Operation (Refer to schematic diagram)
Closing the START button or other pilot device energizes the start contactor (1M) which
seals in through its interlock (1M) and energizes the timer (TR). The (1M) contacts connect the first half-winding of the motor across
the line. After a preset time interval, the timer
(TRTC) contact closes energizing contactor
(2M). The (2M) contact connect the second
half-winding of the motor across-the-line.
Contactor Sequence
Contactor
Start
Run
1M
●
●
●
2M
Typical Schematic Diagram
Part Winding
L1
L2
L1
L2
L3
L3
1M
OL
T2
T3
#3
2M
Select Overload Heater Packs for 50%
of Rated Full Load Motor Current
T1
#1
#2
CKT BKR
or
SW & FU
OL
Motor
T7
T8
T9
Design Features
7
1M
TBX2
Stopped
8
G
Contactors – (1M) (2M)
A three-pole contactor (1M) connects only the
first half-winding of the motor for reduced
inrush current on starting (see table below for
size). A three-pole contactor (2M) connects
the second half-winding of the motor for
running (see table below for size).
Run
R
TB1
Stop
TB1
TB2
Start
On-Delay
1M
PS
Auto
A1
TB3
TB1 TB1
2
TB3
Off
T.C. = Timed Closing
Hand
8 TR
6
5
A1
1M
A2
1.5 – 15 Sec.
TR
7
E
2M
(1M)
OL
TB4
95
96
(2M)
OL
A
95
96
A2
T.C.
Maximum
Hp
NEMA Size
Starter
Contactor
(1M)
(2M)
1
2
3
4
5
6
1
2
3
4
5
6
230 Volts, 60 Hz
15
25
50
75
150
300
1 PW
2 PW
3 PW
4 PW
5 PW
6 PW
Size
460-575 Volts, 60 Hz
J
15
40
75
150
350
600
1 PW
2 PW
3 PW
4 PW
5 PW
6 PW
Reduced Voltage Enclosures (Refer to page J4-5 for dimensions)
1
2
3
4
5
6
1
2
3
4
5
6
Freedom ECN Box Number
Freedom ECN Box Numer
NEMA 1
3R, 4X, 12
NEMA 1
3R, 4X, 12
Class 45: Partwinding – Non-combination
2PW
3
7
7➁
7
3PW-4PW
9
9
9➁
9
5PW
E
E
E➁
E
E
E
Class 46: Partwinding – With Disconnect
Class 47: Partwinding – With Thermal Magnetic Trip CB
2PW-4PW
E
E
Overload Relay – (OL)
Two three-pole type B overload relays
provide starting and running overcurrent
protection.
Timing Relay – (TR)
An electrically operated pneumatic relay
provides accurate, adjustable start-to-run
transfer timing.
Other Types
Part-winding Type ECN45 starters are also
available in combination (Type 46 and 47),
reversing and three point (primary resistor)
types.
➀ 76- and 90-inch enclosures are floor mounted.
➁ Advantage utilizes a NEMA 12 enclosure.
CAT.71.01.T.E
Cutler-Hammer
Reduced Voltage Motor Control
Motor Starters – NEMA Magnetic
January 1999
J4-3
Wye-Delta Type
Description
Wye-Delta type starters are applied extensively to industrial air conditioning installations because they are particularly suited for
starting motors driving high inertia loads
with resulting long acceleration times. They
are not, however, limited to this application.
When six- or twelve-lead delta-connected
motors are started wye-connected, approximately 58% of line voltage is applied to each
winding and the motor develops 33% of
full-voltage starting torque and draws 33% of
normal locked-rotor current from the line.
When the motor is accelerated, it is reconnected for normal data operation.
de-energizes the timer (TR) opening timer
(TRTC) thus energizing contactor (2S).
Operation (Refer to schematic diagram)
Closing the START button or other pilot device
energizes contactor (1S) whose contacts connect the motor in a wye connection. Interlock
(1S) closes, energizing contactor (1M) and
timer (TR). The (1M) contacts energize the
motor windings in a wye. After a preset time
interval, timer (TRTC) contact closes energizing contactor (2S). Interlock (2S) opens, dropping out contactor (1S). The motor is now
energized in series with the resistors. Interlock
(1S) closes, energizing contactor (2M), bypassing the resistors and energizing the delta connected motor at full voltage. Interlock opens,
An overload, opening the STOP button or
other pilot device de-energizes contactors
(1M) and (2M), removing the motor from the
line. (TRP) de-energizes and locks out the
control circuit if the duty cycle of the transition resistors is exceeded.
Wye-Delta Class ECN51 closed transition starters are also available in combination types
and Class ECN48 open transition non-combination and combination starters.
Typical Schematic Diagram
Design Features
Contactors – (1S) (1M) (2S) (2M)
A three-pole contactor (1S)➀ shorts the
motor leads T4-T5-T6 during starting to connect motor in wye (see table below for size).
Wye-Delta
Closed Transition
L1 CKT BKR #1
#2
L2
or
L3 SW & FU #3
L1
L2
L3
2M
T6
T4
T5
1S
1S
2S
1M
T3B
Select Overload Heater Coils
for 58% of Rated Full Load
Motor Current
Resistor
T1B
Resistor
A three-pole contactor (1M) energizes motor
leads T1-T2-T3 for both wye and delta connections (see table below for size).
Resistor
T2B
1S
OL
T1
T2
T3
T1A
A three-pole contactor (2S) connects resistors in series with the motor windings during
the start-to-run transition period (see table
below for size).
T2A
1S
5
5
7
Stopped
2M
8
R
TB1
Stop
TB1
On-Delay 1.5 – 15 Sec. TR
2
E
Start
TB2
TB3
1S
2M
2S
51
52
A1
53
2
1 TR 3
Contactor
(1M)
(2M)
(1S)
(2S)
TB1
230 Volts, 60 Hz
10
25
50
75
150
300
500
800
1 YD
2 YD
3 YD
4 YD
5 YD
6 YD
7 YD
8 YD
1 YD
2 YD
3 YD
4 YD
5 YD
6 YD
7 YD
8 YD
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
4
5
6➀
7➀
1
1
1
2
3
4
5
6
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
4
5
6➀
7➀
1
1
1
2
3
4
5
6
7
A2
TB4 1 TRP 4
TRP
E
2S
95
96
7
A2
TB3
1S
54
A1
56
A1
1M
A2
T.O. = Timed Opening
T.C. = Timed Closing
1M
8 TR 6
55
1S
2M
A2
T.C.
J
Reduced Voltage Enclosures (Refer to page J4-5 for dimensions)
Size
➀ 1S is two pole on sizes 7 and 8.
CAT.71.01.T.E
Off
A1
Hand
460-575 Volts, 60 Hz
15
40
75
150
300
700
1000
1500
TB1
T.C.
PS
Auto
1S
T.O.
1M
NEMA Size
Starter
TBX2
G
Run
A three-pole contactor (2M) energizes the
motor leads T4-T5-T6 during running to connect the motor in delta (see table below for
size).
Max.
Hp
Motor
T3A
Freedom ECN Box Number
Freedom ECN Box Number
NEMA 1
NEMA 1
3R, 4X, 12
E
E
3R, 4X, 12
Classes 48, 51: Wye Delta – Non-combination
Classes 49, 52: Wye Delta – With Disconnect
Classes 50, 53: Wye Delta – With Thermal Magnetic Trip CB
WYD-4YD
E
E
J4-4
Cutler-Hammer
Reduced Voltage Motor Control
Motor Starters – NEMA Magnetic
January 1999
Autotransformer Type
Typical Schematic Diagram
R
L2
L2
L3
L3
#1
#2
CKT BKR
or
SW & FU
R
#3
5E
5D
7
Duty cycle of these starters is as follows: up
to 200 hp, 15 seconds on each 4 minutes for 1
hour, repeated after 2 hours. Over 200 hp,
three periods of 30 seconds on, 30 seconds
off repeated after 1 hour.
8
T2
Motor
T3
1S
0%
50%
1E
1S
1D
TBX2
10
G
Run
R
TB1
TB1
Stop
TB2
Start
On-Delay
1.5 – 15 Sec.
TR
2
7
TB3
E
Design Features
8 TR
Contactors - (1S) (2S) (Run)
A three-pole (1S)➂ and a three-pole contactor
(2S) connect the motor to the autotransformer for reduced-voltage starting (see table
below for size).
T1
Stopped
R
9
OL
3D
2S
1S
65%
100%
2S
0%
L1
1S
1C
3E
0%
L1
5C
100%
R
100%
Closed transition is standard on all sizes
assuring a smooth transition from reduced to
full voltage. Since the motor is never disconnected from the line there is no interruption
of line current which can cause a second
inrush during transition.
3C
2S
RVNR AUTOXFMR (3-coil)
50%
28%➁
45%➁
67%➁
50%
25%
42%
64%
80%
50%➀
65%
80%
Other Types
Autotransformer starters are also available in
combination and reversing types.
65%
Line Inrush
% Locked
Ampere
An overload, opening the STOP push button
or other pilot device de-energizes the (R) contactor removing the motor from the line.
65%
Starting Torque
% Locked
Torque
contactor (R) which seals in through its interlock (R). The run contacts are now closed, and
the motor is running at full voltage. Start contactor (2S) and relay (TR) are de-energized
when interlock (R) opens.
80%
Tap
Operation (Refer to schematic diagram)
Closing the START button or other pilot
device energizes the start contactor (1S). The
interlock (1S) closes, energizing the timing
relay (TR) and contactor (2S) which seal in
through the interlock (2S). With the (1S) and
(2S) contactors closed, the motor is connected through the autotransformer for reducedvoltage start. After a preset time interval, the
(TRTO) contacts time open, de-energizing
contactor (1S) and connecting the autotransformer as a reactor in series with the motor.
Interlock (1S) immediately energizes the run
80%
Description
Autotransformer type starters are the most
widely used reduced-voltage starter because
of their efficiency and flexibility. All power
taken from the line, except transformer losses, is transmitted to the motor to accelerate
the load. Taps on the transformer allow
adjustment of the starting torque and inrush
to meet the requirements of most applications. The following characteristics are
produced by the three-voltage taps:
5 51
R
1S
52 A1
TB4
OL
95
A2
OTT "C" OTT "E" OTT "D"
96 B
C
D
Auto-Transformer
Overtemp SWa
T.O.
2S
TB1
TB1
A1
2S
A2
2S
TB3
Off
8 TR
Hand
53
1S
PS
Auto
6 54
1S
55
A1
R
A2
T.O. = Timed Opening
T.C. = Timed Closing
T.C.
A three-pole contactor (Run) bypasses the autotranformer and connects the motor for fullvoltage across-the-line running (see table below for size).
J
Maximum
Hp
Size
NEMA Size
Starter
Contactor
Run
Reduced Voltage Enclosures (Refer to page J4-5 for dimensions)
Starting
(1S)
(Three
Pole)
(2S)
(Three
Pole)
2
3
4
5
6
7
8
2
3
4
5
6
6➂
7➂
2
3
4
5
6
6
7
2
3
4
5
6
7
8
2
3
4
5
6
6➂
7➂
2
3
4
5
6
6
7
Freedom ECN Box Number
Freedom ECN Box Number
NEMA 1
NEMA 1
3R, 4X, 12
E2
E2
3R, 4X, 12
Class 42: Autotransformer – Non-combination
Class 43: Autotransformer – With Disconnect
Class 44: Autotransformer – With HMCP
2-4
E2
E2
230 Volts, 60 Hz
15
30
50
100
200
300
450
2
3
4
5
6
7
8
460-575 Volts, 60 Hz
25
50
100
200
400
600
900
2
3
4
5
6
7
8
➀ Not included 50 hp and below.
➁ Includes transformer magnetizing current.
➂ 1S is two pole on sizes 7 and 8.
CAT.71.01.T.E
Cutler-Hammer
Reduced Voltage Motor Control
Motor Starters – NEMA Magnetic
January 1999
J4-5
Dimensions
Dimensions in Inches (mm)
Box
Number
Wide A
High B
Deep C
Wide D
High E
E
28.00 (711)
61.75 (1569)
12.88 (327)
22.50 (572)
60.15 (1528)
E2
28.00 (711)
56.10 (1425)
12.76 (324)
22.50 (572)
54.50 (1384)
190
7
16.25 (413)
14.37 (365)
7.51 (191)
11.00 (279)
13.50 (343)
24
9
25.50 (648)
29.10 (739)
3
12.65 (321)
14.40 (366)
9.31 (237)
7.31 (186)
Mounting
180
20.00 (508)
27.50 (699)
72
9.75 (248)
11.25 (286)
17
B
Reduced Voltage Enclosures
Size
A
Ship Weight
lbs.
Freedom ECN Box Number
Freedom ECN Box Number
NEMA 1
NEMA 1
3R, 4X, 12
E2
E2
E2
3R, 4X, 12
E
Class 42: Autotransformer – Non-combination
Class 43: Autotransformer – With Disconnect
Class 44: Autotransformer – With HMCP
2-4
E2
D
Class 45: Partwinding – Non-combination
2PW
3
7
7➀
7
3PW-4PW
9
9
9➀
9
5PW
E
E
E➀
E
Class 46: Partwinding – With Disconnect
Class 47: Partwinding – With Thermal Magnetic Trip CB
2PW-4PW
E
E
C
Box E
E
E
E
E
Classes 48, 51: Wye Delta – Non-combination
Classes 49, 52: Wye Delta – With Disconnect
Classes 50, 53: Wye Delta – With Thermal Magnetic Trip CB
2YD-4YD
E
E
J
Boxes 7, 9
Boxes 3
➃ Advantage utilizes a NEMA 12 enclosure.
CAT.71.01.T.E
J4-6
Cutler-Hammer
Reduced Voltage Motor Control
Solid-State Motor Starters
January 1999
General Description
Applications
Cutler-Hammer’s Easy Start solid-state
products can be applied in a wide array of
customer applications. Typical benefits of
solid-state include:
● Reduced starting torque stress on mechanical equipment allowing longer life of
belts, gears, pulleys, and motor shafts
commonly weakened during “across-theline” starting.
● Reduction of voltage drop during starting
on weak utility systems where the performance of nearby equipment would be
negatively affected.
● Reduced inrush current during starting
which will allow better management of
utility peak demand charges.
● Energy savings where light load conditions allow the phase-back of voltage during “idle” periods.
● Smooth, stepless starting with an infinite
amount of torque and ramp time settings
allowing superior flexibility over typical
electromechanical starting methods.
Typical applications include:
Centrifugal and Screw Compressors
Material Handling Equipment
Pumps, Fans and Blowers
Food Processing
Machinery
Cranes and Hoists
Enclosure Type
J
Cutler-Hammer offers a complete family of
UL listed solid-state reduced voltage starters
from 1-750 hp at 460 volt. Ratings at 208/230
and 575 volt 60 Hz and 380 volt 50 Hz are also
available. Units can be mounted in NEMA 1,
NEMA 12 and open panel construction.
Motor control center mounting is also
possible utilizing the Easy Start EA allowing
mounting of up to 600 hp in a 20-inch wide
Motor Control Center section. Starters in
specialty enclosures such as NEMA 4 and 4X,
are also available using a unique and
electrically efficient method of power
semiconductor bypass.
Available in 4 different product classes, these
starters provide soft-starting of ac induction
motors. Motor voltage is adjustable by
means of back-to-back SCRs (silicon controlled rectifiers) providing a smooth, stepless start (and stop) of the motor driven load.
C514 – Solid-State Controller
Typically retrofited between an existing electromechanical starter and motor. No overload protection is included. Available from
10-100 amperes.
Easy Start EJ – Solid-State Starter
Complete starter with Class 10 electronic
overload protection. Ideal for applications
where few advanced protection features are
required. Available from 10-390 amperes.
Easy Start ES – Solid-State Starter
Full featured starter with Class 20 electronic
overload and advanced motor protection
package (phase loss, current unbalance,
undervoltage, and overtemperature protection). Door mounted status and diagnostic
LEDs and an abundance of standard options.
Available from 6-950 amperes.
Easy Start EA – Solid-State Starter with
Advantage Contactor Bypass.
This unique product utilizes the SCRs during
the start sequence only, and then a contactor
is closed in parallel to handle continuous current during run duty, significantly reducing
power losses. This extremely small efficient
product is ideal for the space conscious user.
Available from 11-760 amperes.
Airborne particulate may be detrimental to
starter performance and reliability, so caution
must be exercised in choosing the enclosure
best suited to the environment. The NEMA
rating of the enclosure defines its ability to
withstand the ingress of foreign particulate
as described below:
NEMA 1
A general purpose, indoor-type enclosure.
NEMA 12
A dust-tight and drip-tight enclosure for
indoor industrial applications.
NEMA 4
A watertight and dust-tight enclosure for
either indoor or outdoor use.
NEMA 4X
Identical to NEMA 4, with the additional
requirement that the enclosure be corrosionproof as well.
All Easy Start products include standard adjustments such as adjustable starting torque,
ramp time, and current limit settings. A patented load sensing circuit that reduces applied voltage during “light load” conditions is
included on all EJ/ES units and can result in
energy savings when duty cycles allow. The
EA product achieves lower losses by bypassing the less efficient semiconductors.
CAT.71.01.T.E
Cutler-Hammer
Reduced Voltage Motor Control
Solid-State Motor Starters
January 1999
J4-7
General Description
Solid-State Starters Product Comparison
Description
Series
C514
Easy Start EJ
Easy Start ES
Easy Start EA
Range
Type
Voltage
Overload
Ramp Type
Ramp Time
Current Limit
Initial Torque
Phase Sensitive
Energy Saver
Phase Loss
LEDs
Smooth Stop
Pulse Start
Extended Start
10-100A
Controller
200-600V
No
Voltage
1-45s
No
40-80% V
No
No
No
1
Option
No
No
10-390A
Starter
200-600V
Class 10
Voltage
2-70s
250-500%
20-90% V
Yes
Yes
No
1
Option
No
No
6-950A
Starter
200-600V
Class 20
Voltage or Current
1-40s
200-500%
20-90% V
Yes
Yes
Standard
9
Option
No
Option
11-760A
Starter
200-600V
Class 10/20
Current
1-45s
100-500%
100-200% I
Yes
No
Standard
3
Option
Option
No
Continuous Duty
100%
100%
120%
115%
Paralleling Bypass
Open Chassis
NEMA 12
NEMA 3R
NEMA 4
NEMA 4X
Circuit Breaker
No
Yes
Yes
Yes
No
No
No
No
Yes
Yes (130A Max.)
No
No
No
No
No
Yes
Yes (500A Max.)
No
No
No
Option
Standard
Yes
Yes
Yes
Yes
Yes
Option
Application and Environmental
Considerations
The installation environment for a solid-state
reduced voltage starter is of prime concern.
Conditions such as ambient temperature,
altitude and the presence of corrosives or
moisture must all be considered when choosing an enclosure and applying the starter.
Ambient Temperature
Easy Starts are rated for 40°C (104°) ambient
temperature. For above 40°C derate by 5% for
every 5°C rise over 40°C up to 50°C (122°F)
maximum.
Altitude
Easy Starts are rated for 1000 meters
[3300 ft.]. Use Derate formula for derating
above 1000 meters.
DERATE % (meters)
= [Actual Altitude – 1000] [7%]/1000
Multi-Motor Operation
Easy Starts can be used to control multiple
motors if the following conditions are met:
● The current rating of Easy Start should be
equal to or greater than the total of individual motor full load amperes and Easy
Start must be set for the cumulative full
load amperes of the motors.
CAT.71.01.T.E
● Individual motor overcurrent protection
is provided by others.
● Energy Saver circuit is turned OFF.
● The motors should not be mechanically
coupled together, i.e., two motors on
same shaft.
● NEC and local code requirements for individual motor protection and branch circuit
protection are met.
Frequent Starting/Stopping
The number of starts and stops allowable
depends upon many factors. The most
important ones are:
1. Set level of the starting current limit
2. Start time.
3. Run time.
4. Off time before next start.
The number of starts per hour is based on the
current carrying capacity of the SCRs. A high
start/stop duty may require the oversizing of
the Easy Start. If a high number of multiple
starts occur, the starter may trip due to the
inverse time overload current protection
function. In this situation, it is advisable to
wait a period of 10 minutes before restarting
to avoid damage to the Easy Start and allow
the thermal sensor to reset. The motor
manufacturer should be consulted about the
effect of a high number of multiple starts on
motor life.
Starting Torque
The reduced voltage applied to the motor
results in reduced inrush current and a soft
start. However, it reduces the starting torque
of the motor. The relationship is as follows:
Torque at reduced current =
Torque at full current
Current at reduced voltage 2
Current at full voltage
EXAMPLE: A 100 hp 1800 rpm 460V NEMA B
motor draws six times full load amperes for
starting, and starting torque is 150% of full
load torque.
If the same motor is started with Easy Start at
300% current limit, then the available torque
would be:
300
600
2
= 1/4 of full voltage torque
= 1/4 x 150% full load torque = 37.5% full load
torque available.
Open Units
Open panel units should be mounted in a box
so the temperature inside the box does not
exceed 50°C (122°F).
For sizing the enclosure the heat loss in watts
can be estimated at 3 times the full load
current.
EXAMPLE: For ES-180-4NR the maximum
current rating is 180 amperes. The approximate watts loss at maximum current rating is
3 x 180 = 540 watts.
For units with non-isolated heat sinks, all the
watt loss must be dissipated through the box
surface.
For units with isolated heat sinks; the heat
sink fins should be brought out in open air
through a properly gasketed cutout in the
enclosure. Approximately 50% watt loss is
dissipated through the heat sinks and the
remaining 50% should be dissipated through
the remainder of the box surface, not
counting the heat sink.
NEMA Design C and D Motors,
Wound Rotor Motors
These motors are used due to their high
starting torque characteristics. When high
starting currents and high starting torques
are required, the extended time current
option must be supplied with an oversized
Easy Start ES unit. Consult the factory for
application considerations.
J
Cutler-Hammer
Reduced Voltage Motor Control
Solid-State Motor Starters
J4-8
January 1999
C514 Soft Start Controller
Standard Design Features
Description
The C514 requires no separate control power wiring when wired between a starter and the
motor. All customer power connections and adjustments are easily accessible. Simple installation makes the C514 ideal for new or retrofit applications.
3-Phase Supply
L1
L2
L3
Motor
Starter
“Soft Start”
Controller
OL
T1
C514 Soft Start Controller
The Cutler-Hammer C514 is a solid-state
motor controller providing reduced voltage
“Soft” starting for three-phase ac induction
motors. Installation is easy — the C514 is
simply connected in series with the existing
electromechanical motor starter. An optional
version provides a controlled deceleration
ramp for Soft-Stop applications and a
separate 120V control scheme for additional
control flexibility where required.
T2 T3
T1 T2 T3
Motor
Typical Wiring Diagram for Basic C514 Controller
C514 Soft Start Controller – Horsepower Rating, Dimensions and Weights
Current
Rating
Amperes➀
Maximum
HP
Rating
Motor
Volts
Catalog
Number➁
Dimensions in Inches (mm)
Wide
High
Deep
Mounting
A
B
C
D
Screw
Size
E
Shipping
Weight
Lbs.(Kgs)
F
Open Type
J
11/9.6/11
3/3/7.5
200/230/460
C514BNOC
7.02 (178)
9.51 (242)
5.45 (138)
5.63 (143)
8.50 (216)
1/4"
9 (4.08)
11/11
7.5/10
460/575
C514BNOD
7.02 (178)
9.51 (242)
5.45 (138)
5.63 (143)
8.50 (216)
1/4"
9 (4.08)
17.5/22/21
5/7.5/15
200/230/460
C514CNOC
7.08 (180)
13.20 (335)
5.66 (144)
6.53 (166)
11.00 (279)
1/4"
11 (5.0)
21/22
15/20
460/575
C514CNOD
7.08 (180)
13.20 (335)
5.66 (144)
6.53 (166)
11.00 (279)
1/4"
11 (5.0)
32.2/42/40
10/15/30
200/230/460
C514DNOC
9.75 (248)
12.00 (305)
6.09 (155)
8.01 (204)
11.00 (279)
1/4"
14 (6.35)
40/41
30/40
460/575
C514DNOD
9.75 (248)
12.00 (305)
6.09 (155)
8.01 (204)
11.00 (279)
1/4"
14 (6.35)
48.3/54/52
15/20/40
200/230/460
C514ENOC
9.75 (248)
12.00 (305)
6.09 (155)
8.01 (204)
11.00 (279)
1/4"
14 (6.35)
52/52
40/50
460/575
C514ENOD
9.75 (248)
12.00 (305)
6.09 (155)
8.01 (204)
11.00 (279)
1/4"
14 (6.35)
92/80/96
30/30/75
200/230/460
C514FNOC
9.05 (230)
14.50 (368)
7.87 (200)
6.42 (163)
7.42 (189)
1/4"
27 (12.3)
96/99
75/100
460/575
C514FNOD
9.05 (230)
14.50 (368)
7.87 (200)
6.42 (163)
7.42 (189)
1/4"
27 (12.3)
NEMA 3R/12 Enclosed
11/9.6/11
3/3/7.5
200/230/460
C514BDOC
8.09 (206)
11.64 (296)
5.84 (148)
6.44 (164)
10.80 (274)
10 - 32
17 (7.7)
11/11
7.5/10
460/575
C514BDOD
8.09 (206)
11.64 (296)
5.84 (148)
6.44 (164)
10.80 (274)
10 - 32
17 (7.7)
17.5/22/21
5/7.5/15
200/230/460
C514CDOC
7.44 (189)
15.13 (384)
5.91 (150)
5.79 (147)
14.13 (359)
1/4"
21 (9.5)
21/22
15/20
460/575
C514CDOD
7.44 (189)
15.13 (384)
5.91 (150)
5.79 (147)
14.13 (359)
1/4"
21 (9.5)
32.2/42/40
10/15/30
200/230/460
C514DDOC
10.64 (270)
16.13 (410)
6.83 (174)
9.00 (229)
15.00 (381)
1/4"
27 (12.3)
40/41
30/40
460/575
C514DDOD
10.64 (270)
16.13 (410)
6.83 (174)
9.00 (229)
15.00 (381)
1/4"
27 (12.3)
48.3/54/52
15/20/40
200/230/460
C514EDOC
10.64 (270)
16.13 (410)
6.83 (174)
9.00 (229)
15.00 (381)
1/4"
27 (12.3)
52/52
40/50
460/575
C514EDOD
10.64 (270)
16.13 (410)
6.83 (174)
9.00 (229)
15.00 (381)
1/4"
27 (12.3)
92/80/96
30/30/75
200/230/460
C514FDOC
20.40 (518)
31.36 (797)
12.51 (318)
18.37 (467)
29.65 (753)
1/4"
125 (56.7)
96/99
75/100
460/575
C514FDOD
20.40 (518)
31.36 (797)
12.51 (318)
18.37 (467)
29.65 (753)
1/4"
125 (56.7)
➀ C514 controllers are designed for use with 1.15
service factor motors having full load current
ratings not exceeding values shown
➁ Separate 120 volt control with deceleration ramp,
add suffix letter “A” to catalog number.
Example C514BDOCA.
CAT.71.01.T.E
Cutler-Hammer
Reduced Voltage Motor Control
Solid-State Motor Starters
January 1999
J4-9
Easy Start E J Soft Start Controller
Catalog Numbering System
Description
EJ 026 — 4 EP Factory option
S - Smooth stop
Easy Start EJ
The Easy-Start EJ is a solid-state reduced
voltage motor starter with built-in electronic
overload protection. The EJ starter is used to
reduce starting current and high starting
torque. The starter’s load-sensing circuit
reduces the voltage to lightly loaded motors
to save energy. EJ starters are available for ac
motors 5 to 300 hp 460 volt in open panel,
NEMA 1 and NEMA 12 enclosures. 208/230,
575 volt, 60 Hz and 380 volt, 50 Hz units are
also available.
Enclosure
EP – Open panel isolated heat sink.
(EJ026, 052, 068, 075, 100 and 130)
NP – Open panel non-isolated heat sink.
(EJ190, EJ270 and EJ390)
NC – Open panel non-isolated heat sink.
Suitable for mounting in 20-inch
wide MCC structure.
(EJ190, EJ270 and EJ390)
ER – NEMA 12
NR – NEMA 1
Full load ampere rating
026
052
Voltage
068
3 – 380/415V
075
4 – 208/230/460V
100
5 – 500/575V
130
190
270
390
Features
●
●
●
●
●
●
●
Complete Starter
Adjustable current limit 250-500%
Energy saving circuit
Six space device panel on enclosure door
Class 10 electronic overload protection
500% for 10 seconds overload capability
Suitable for mounting in 20-inch wide
MCC structure
● UL and CUL listed
EJ Soft Start Controller – Horsepower Rating, Approximate Dimensions and Weights
Ampere
Range
Maximum
Horsepower
Motor
Volts
Catalog
Number
Dimensions (In.)
Height
Width
Clearance (In.)
Depth
Side
Top/Bottom
Weight
(Lbs.)
Open Type
10- 26
5/7.5/15
208/230/460
EJ026
15
14
8
22
20- 52
10/15/30
208/230/460
EJ052
15
14
8
22
25- 68
20/25/50
208/230/460
EJ068
15
14
8
26
28- 75
20/30/60
208/230/460
EJ075
15
14
8
37-100
30/30/75
208/230/460
EJ100
15
14
8
47-130
40/50/100
208/230/460
EJ130
27
14
70-190
60/75/150
208/230/460
EJ190
39 (47.68)➀
26.75 (18.5)➀
26
Does not apply
8
26
40
14 (9.5)➀
100
100-270
75/100/200
208/230/460
EJ270
39 (47.68)➀
26.75 (18.5)➀
14 (9.5)➀
100
142-390
125/150/300
208/230/460
EJ390
39 (47.68)➀
26.75 (18.5)➀
14 (9.5)➀
110
NEMA 12 Enclosed
10- 26
5/7.5/15
208/230/460
EJ026
17.6
13.5
10.75
6
35
20- 52
10/15/30
208/230/460
EJ052
17.6
13.5
10.75
6
35
25- 68
20/25/50
208/230/460
EJ068
28.5
25.25
10.75
6
86
28- 75
20/30/60
208/230/460
EJ075
28.5
25.25
10.75
37-100
30/30/75
208/230/460
EJ100
28.5
25.25
47-130
40/50/100
208/230/460
EJ130
33.8
24.5
Does not
apply
6
86
10.75
6
86
13
6
107
NEMA 1 Enclosed
70-190
60/75/150
208/230/460
EJ190
46.38
18.5
9.5
12
100-270
75/100/200
208/230/460
EJ270
46.38
18.5
9.5
12
142-390
125/150/300
208/230/460
EJ390
46.38
18.5
9.5
12
➀ Dimension in parenthesis is for NC type open
panel for MCC mounting.
CAT.71.01.T.E
100
Does not
apply
100
110
J
J4-10
Cutler-Hammer
Reduced Voltage Motor Control
Solid-State Motor Starters
January 1999
Easy Start ES Soft Start Controller
Description
Line A
Line B
Motor
Line C
To SCR
Reset
Control
Power
Stop
Start
Gates
Control
Logic
&
Protection
Typical Solid-State Reduced Voltage Starter Schematic
The Easy Start ES is a solid-state reduced
voltage motor starter with built-in electronic
overload protection. The ES starter is used
to reduce starting current and high starting
torque. The starters load-sensing circuit
reduces the voltage to lightly loaded motors to
save energy. ES starters are available for ac
motors 5 to 750 hp 460-volt in open, NEMA 1
and NEMA 12 enclosures. 208/230, 575-volt, 60
Hz, and 380-volt, 50 Hz units are also available.
Easy-Start ES Horsepower Rating
Unit
Ampere Ratings
Min.
Base
7
10
18
36
51
71
45
70
120
250
360
500
26
38
80
107
135
180
260
560
750
950
Nominal Horsepower or kW
Max.➀
Hp
208V
Hp
230V
kW
380/415V
Hp
460V
kW
500V
Hp
575V
54
84
144
300
432
600
5- 10
15- 20
25- 40
40- 75
75-100
100-150
5- 15
20- 25
30- 40
50-100
100-150
125-200
4- 22
30- 37
45- 55
75-110
110-200
200-250
5- 30
40- 50
60-100
150-200
200-300
250-400
4- 30
37- 45
55- 75
90-160
200-250
300-355
7- 40
50- 60
75-100
200-250
250-300
300-500
216
312
672
900
1140
40- 60
60- 75
100-200
250-300
350-400
40- 60
75-100
125-200
250-300
300-350
75- 90
110
160-230
355-400
450
75-150
150-200
250-450
500-600
600-750
55-110
160
200-400
450-500
600
100-150
200-250
300-500
600-750
800-900
NEMA 12
ES045➁
ES070➁
ES120➁
ES250
ES360
ES500
NEMA 1
ES180
ES260
ES560
ES750
ES950
Easy-Start ES Dimensions and Weights
Approximate only. Not to be used for construction purposes.
J
Catalog Number➂
Mounting
Enclosure
Height (In.)
Width (In.)
Depth (In.)
Weight (Lbs.)
Line/Load Lugs➃
Sides (In.)
Top and Bottom (In.)
ES045-__EP
ES070-__EP
ES070-__EC
ES120-__EP
ES120-__EC
ES180-__NP➅
ES180-__NC➅
ES260-__NP➅
ES250-__NC➅
ES560-__NP➅
ES750-__NP➅
ES950-__NP➅
—
—
—
—
—
—
—
—
—
—
—
—
Open
Open
Open
Open
Open
Open
Open
Open
Open
Open
Open
Open
16
16
15
16
27
39
48
39
48
39
45
78
19
19
14
19
14
26.75
18.5
26.75
18.5
26.75
30.75
33.00
11.5
11.5
8.3
11.5
8.3
14
9.5
14
9.5
14
17
21
32
33
33
35
60
100
100
112
100
137
320
400
#2
#2
1/0
2/0
250 kcmil
250 kcmil
350 kcmil
500 kcmil
350 kcmil
500 kcmil (2)
600 kcmil (4)
600 kcmil (4)
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
ES180-__NR➅
ES260-__NR➅
ES560-__NR➅
Wall
Wall
Wall
NEMA 1
NEMA 1
NEMA 1
46.5
46.5
46.5
31
31
31
15.5
15.5
15.5
220
232
257
250 kcmil
500 kcmil
500 kcmil (2)
12
12
12
...
...
...
ES180-__NL➅➆
ES260-__NL➅➆
ES560-__NL➅➆
ES750-__NL➅➇
ES950-__NL
Floor
Floor
Floor
Floor
Floor
NEMA 1
NEMA 1
NEMA 1
NEMA 1
NEMA 1
90
90
90
90
90
32
32
32
32
38
21
21
21
21
22.5
500
510
525
720
800
250 kcmil
500 kcmil
500 kcmil (2)
600 kcmil (4)
600 kcmil (4)
...
...
...
...
12
...
...
...
...
...
ES045-__ER
ES070-__ER
Wall
Wall
NEMA 12
NEMA 12
28.5
28.5
25
25
14
14
ES045-__EL
ES070-__EL
ES120-__EL
Wall
Wall
Wall
NEMA 12
NEMA 12
NEMA 12
43.5
43.5
43.5
24.5
24.5
24.5
ES250-__EL➅
ES360-__EL➅
ES500-__EL➅
Floor
Floor
Floor
NEMA 12
NEMA 12
NEMA 12
90
90
90
32
32
32
➀ Maximum rating is 1.2x base rating due to 120%
continuous capability.
➁ Utilizes isolated heat sinks.
➂ __ in Cat. No. is 4 for 208/230/460V models, 3 for
380/415V models, 5 for 460/500/575V models.
➃ Line lug sizes shown are for Easy-Start ES lug. If
circuit breaker option is ordered line connections
Minimum Clearance Required➄
95
95
#2
#2
6
6
6
6
15.5
15.5
15.5
120
120
121
#2
#2
2/0
6
6
6
6
6
6
21
21
21
520
525
550
500 kcmil (2)
500 kcmil (2)
500 kcmil (2)
will be made on circuit breaker. Wall mounted
units arranged for top entry, bottom exit.
➄ Minimum clearance sides is minimum clearance
required between adjacent units. For NEMA 1 enclosure this clearance should be provided between unit and sidewall also. For NEMA 12
enclosures the clearance between unit and sidewall is not required. Minimum clearance top and
12
12
12
...
...
...
bottom is required for NEMA 12 models only.
Minimum clearance required for open models will
depend upon enclosure provided by others.
➅ Use non-isolated heat sinks. Heat is dissipated via
the enclosure surfaces.
➆ MCC structure with 4-inch wire-way, could have
cable entry/exit top or bottom.
➇ ES750 arranged for top entry and exit only.
CAT.71.01.T.E
Cutler-Hammer
Reduced Voltage Motor Control
Solid-State Motor Starters
January 1999
J4-11
Easy Start ES Soft Start Controller
Catalog Numbering System
ES 120 — 4EL - XXX
Options (any sequence)
Easy Start ES
Base ampere rating
045
070
120
180
250
260
360
500
560
750
950
Enclosure
ER – Regular NEMA 12
NR – Regular NEMA 1
EL – Large NEMA 12
NL – Large NEMA 1
EP – Open panel isolated heat sink
EC – Open panel isolated heat sink
suitable for mounting in 20-inch
wide MCC structure
(ES045, ES070 and ES120)
NP – Open panel non-isolated heat sink
NC – Open panel non-isolated heat sink
suitable for mounting in 20-inch
wide MCC structure
(ES180 and ES250)
Voltage
3 – 380/415V
4 – 208/230/460V
5 – 460/500/575V
For product description refer to Descriptive Bulletin 8650.
Line
DIP
Switch
Current
Feedback
CT
Rectifier
Inverse
Time
Trip
Instant
Trip
Curr.
Limit
Init. Step Time
Max
Volts
Curr.
Trip
Gates
SCR’s
Voltage
Ramp
Current
J
Undervoltage
Min.
Volts
Voltage
Feedback
Amplifier
Stab
Phase
Rotation
Phase
Loss
Lockout
Digital
Trigger
Current
Unbalance
Over Temp
Aux. Trip
Remote Contact
Easy-Start ES Block Diagram
CAT.71.01.T.E
Motor
J4-12
Cutler-Hammer
Reduced Voltage Motor Control
Solid-State Motor Starters
January 1999
Easy Start EA
Description
Easy Start Advantage
The Easy Start EA combines the performance
benefits of a solid-state starter with the electrical efficiencies and small physical size typically associated with electromechanical devices.
The Easy Start EA uses six back-to-back silicon controlled rectifiers (SCRs) to provide
smooth, stepless, acceleration to an ac induction motor. Once the motor reaches full
speed, an Advantage bypass contactor is energized in parallel to the SCRs to handle the
motor’s continuous duty requirements.
Since the SCRs are only conducting current
for a short period of time, electrical losses are
greatly reduced. The elimination of bulky heat
sinks allows the Easy Start EA to be packaged
in a wide selection of space saving enclosures.
J
Specifications
Features and Benefits
● Line voltage . . . . . . . . . . . . . . . .200-600V
ac, 3-phase, 60 Hz
● Output . . . . . . . . . . . . . . . . . . . .6 SCR’s full
wave during start; bypass contactor during
run
● Control voltage . . . . . . . . . . . . .120V ac,
+10%/-15%
● Ramp time . . . . . . . . . . . . . . . . .1-45
seconds, 16-position hexadecimal switch
● Initial torque . . . . . . . . . . . . . . .100-200%
current, 16-position hexadecimal switch
● Current limit. . . . . . . . . . . . . . . .100-500%
of base rating, 16-position hexadecimal
switch
● Overload capacity . . . . . . . . . . .115%
continuous (of base rating)
● Overload protection . . . . . . . . .Inverse
time-trip, DIP switch adjustable;
Class 10/20 selectable
● Phase rotation . . . . . . . . . . . . . .ABC only
start prohibit
● Phase loss/unbalance . . . . . . . .35% or
greater difference between any two
phases
● RC snubber . . . . . . . . . . . . . . . .SCR
protection for dv/dt characteristics
● LED indications . . . . . . . . . . . . .Phase
unbalance, current trip and phase rotation
● Trip relay . . . . . . . . . . . . . . . . . .NO contact
Ratings . . . . . . . . . . . . . . . . . . . .60 VA
resistive load, 20 VA inductive load
Maximum switching voltage . .125V ac
Maximum switching current . .1 ampere
Closes on . . . . . . . . . . . . . . . . . .phase
unbalance or overload trip
● Ambient temperature:
Open. . . . . . . . . . . . . . . . . . . . . -20° to 50°C
Enclosed. . . . . . . . . . . . . . . . . . -20° to 40°C
Storage. . . . . . . . . . . . . . . . . . . -50° to 65°C
● Smooth stop (option) . . . . . . . 1-75
seconds
● Pulse start (option) . . . . . . . . . 0.2-3
seconds
Feature
● Smooth
Start/Stop
Benefit
Stepless motor acceleration/deceleration, reduced
initial torque and inrush
currents
● Adjustable
Wide range of initial step
Torque
settings for various load
starting requirements
● Adjustable
Ability to control rate of
Ramp Time
current ramp
● Small Physical Reduced panel space,
Size
smaller enclosures
● Reduced Heat Better efficiencies/no heat
Losses
dissipation concerns
● 600V Rating
One product for systems
from 208 to 575V
● Emergency
The Advantage starter is
Backup
rated to handle full starting
current in an across-theline mode, if a problem is
encountered
● Current Limit Limits current inrush and
current draw during ramp
● Electronic
Flexibility of use with
Overload
various motor sizes. More
accurate than bimetallic
methods
● Class 10 or 20 Overload curve can be
Overload
tailored to application
Protection
requirements
● Advantage
Reduced contact bounce
Starter
and contact wear; lifetime
Bypass
coil warranty; contactor
closes and opens at 1
times current
➃
➁
➂
➀ User supplied Remote Reset can be installed by
removing jumper between terminals 2 and 3.
➁ End-of-ramp Relay (K201) and Trip Relay (K200)
are part of Logic Board; a remote fault device,
such as Shunt Trip, may be connected in series
with the N.O., K200 contact at point 8.
➂ Starter is reset by interrupting 120-volt supply at
remote reset; or, by using the “RESET” pushbutton
on the main logic board, which is at low level
voltage.
➃ CPT and operator devices to be supplied by users
unless ordered with enclosed units. Models
EA045 through EA135 require 150VA minimum
CPT. Models EA270 through EA760 require 300VA
minimum CPT.
CAT.71.01.T.E
Cutler-Hammer
Reduced Voltage Motor Control
Solid-State Motor Starters
January 1999
J4-13
Easy Start EA
Catalog Numbering System
Open Panel (60 Hz):
E A
PN
Enclosed Units:
ESEA
1
Ø
G –
Options: B1,
A5, A6, T, C, etc.
Options:
S = Smooth Stop
P = Pulse Start
G = General Duty
FLA — 045, 090, 135, 270, 360, 540, 760
FLA — 045, 090, 135, 270, 360,
540, 760
Voltage: D = 200-600V, 60 Hz
G = 200-600V, 50 Hz
Open Panel (50 Hz):
E A
PN5
Type: Ø = Standard Design 40°C
Enclosures: S = NEMA 1, D = NEMA 12
W = NEMA 3R/4, C = NEMA 4X
Options:
S = Smooth Stop
P = Pulse Start
Series: 1 = Version 1
FLA — 045, 090, 135, 270, 360,
540, 760
Easy Start EA Enclosed
Ratings
Catalog
Number
Amperes
Base
Rating
Maximum
Continuous
Minimum
Horsepower
208V
230V
460V
575V
380V
Kilowatts
415V
EA045
EA090
EA135
EA270
EA360
EA540
EA760
45
90
135
270
360
540
760
52
104
155
311
414
621
874
12
23
34
69
92
137
193
15
30
50
100
125
200
250
15
30
50
100
125
200
300
30
60
100
200
250
450
600
40
75
125
250
350
500
750
22
45
55
110
160
250
400
22
45
75
110
160
300
450
Approximate Dimensions and Shipping Weights
Model
EA045
EA090
EA135
EA270
EA360
EA540
EA760
CAT.71.01.T.E
Open Starter Panel
Enclosed Starter
W
H
D
Lbs.
W
H
D
Lbs.
10.5
10.5
10.5
15.0
15.0
16.0
18.0
14.0
16.0
16.0
24.0
24.0
30.0
32.0
6.6
7.5
7.5
9.7
9.7
10.7
11.6
12
18
18
70
81
210
260
25.6
25.6
25.6
37.6
37.6
37.6
39.8
30.4
30.4
30.4
48.4
48.4
60.4
72.0
11.2
11.2
11.2
13.2
13.2
13.2
15.4
80
135
160
270
270
325
400
D
W
H
J
J4-14
Cutler-Hammer
Reduced Voltage Motor Control
Solid-State Motor Starters
January 1999
Typical Specifications
Soft Start Controller Type C514
1. Controller shall be Cutler-Hammer type
C514.
2. The solid-state low-voltage controller
shall consist of a power section mounted
on an electrically isolated heat sink, a
logic board located above the power section and shall be used in series with a
separately specified electromagnetic
starter with class 10 overload protection.
3. The power section shall be three-phase,
60 hertz, and rated for the hp, current and
voltage as shown on the drawings. It shall
consist of three (3) sets of back-to-back
phase controlled power semiconductors.
4. Power semiconductors shall be rated with
peak inverse voltage at least 2.5 times
rated line-to-line voltage. Suitably rated
snubbers for voltage suppression shall be
included.
5. The one-piece logic board shall be
mounted for easy testing and adjustment
with quick disconnect plugs. Logic circuitry shall include:
J
a. Voltage ramp-up time adjustment – 5
to 45 seconds
b. Initial voltage adjustable from 20% to
80% of rated voltage to provide for
optimum starting torque
c. The logic boards of all current ratings
for a given voltage shall be interchangeable
d. Each unit to be capable of multiple
voltage operation
e. Optional smooth stop time adjustment
from 5 to 45 seconds with an interlock
to release starter seal-in lock upon
completion of stop cycle. Unit shall
automatically reset upon removal of
line power.
6. The solid-state logic shall be phase
sequence insensitive.
7. A cover plate shall be mounted above the
logic board to provide:
a. An insulating safety barrier
b. Warning labels
c. Adjustment and setup instructions for
current limit, time, torque, and horsepower (ampere) ratings
d. Identified holes shall be located above
adjustment pots so that screwdriver
adjustments can be achieved without
removing the cover.
8. Ground lug shall be furnished mounted
on the isolated heat sink.
9. Enclosures
a. Enclosures shall be NEMA 3/12.
Solid-State Reduced Voltage Motor
Starter Type EJ
1. Motor starter shall be Cutler-Hammer
type EJ.
2. The solid-state reduced voltage motor
controller shall consist of a power section, a one-piece printed circuit logic
board and field wiring interface terminals.
3. The power section shall be three-phase,
60 hertz, and rated for the hp, current and
voltage as shown on the drawings. It shall
consist of three (3) sets of back-to-back
phase-controlled power semiconductors.
Maximum current limit shall be 500% for
standard units.
4. Resistor/capacitor snubber networks shall
be used to prevent false firing of SCRs
due to dv/dt effects.
5. Fan cooled units shall be supplied with
thermal sensors on the heat sink to trip
the control protective logic for overtemperature condition.
6. The one-piece logic board shall be
mounted for easy testing, service and
replacement.
7. Three-phase current sensing via current
transformers for closed loop control to
insure motor stability shall be provided.
14. Tripped functions shall be designed to be
cleared by removing power from the solidstate logic board.
15. The starter shall have a light emitting
diode (LED) to indicate incorrect phase
rotation.
16. Two (2) ground lugs shall be furnished,
one (1) for incoming and one (1) for outgoing ground connections.
17. Power terminations shall consist of pressure type terminals for top or bottom
entrance.
18. Enclosure
a. Unit shall be supplied as an [open
panel] [NEMA 1 enclosed] [NEMA 12
enclosed].
b. A door-mounted device panel shall be
provided for [field] [factory] mounting
of operator’s devices.
19. Units enclosed in motor control centers
shall be of the same manufacturer as that
of the circuit breaker and motor control
center for coordination and design issues.
20. The manufacturer of the solid-state
starter shall employ a field-based factory
service organization for the purpose of
start-up and repair of units. Third party
service contractors are not acceptable.
8. The logic board shall use quick disconnect plug-in connectors for current transformer inputs, line-and-load voltage
inputs, SCR gate firing output circuits,
and status panel.
Solid-State Reduced-Voltage Motor
Starter Type ES
9. The logic circuitry shall include as a
minimum:
2. The solid-state reduced voltage motor
controller shall consist of a power section, a one-piece printed circuit logic
board and a field wiring interface terminal board.
a. Inverse time running overcurrent
protection
b. Auxiliary trip circuitry
c. Gate firing circuit lockout protection
on trip
d. Fault relay lockout protection
e. 250% to 500% current limit adjustment
f. Initial voltage adjustment
g. Acceleration time adjustment.
10. The logic board soldering shall be treated
with a conformal protective coating
system.
11. The logic board shall include, as standard, current and motor slip sensing circuitry that continually monitor motor load
and regulate motor voltage to minimize
motor kWh energy consumption.
12. The solid-state logic shall provide phase
sequence protection.
13. External interface circuitry shall include
120-volt relay logic interface capability.
1. Motor starter shall be Cutler-Hammer
type ES.
3. The power section shall be three-phase,
60 hertz, and rated for the hp, current and
voltage as shown on the drawings. It shall
consist of three (3) sets of back-to-back
phase controlled power semi-conductors.
Maximum current limit shall be 500% for
standard units.
4. Resistor/capacitor snubber networks shall
be used to prevent false firing of SCRs
due to dv/dt effects.
5. Fan-cooled units shall be supplied with
thermal sensors on the heat sink to trip
the control protective logic for overtemperature condition. Thermal sensors
shall be rated 90 degree C maximum.
6. The one-piece logic board shall be
mounted for easy testing, service and
replacement.
CAT.71.01.T.E
Cutler-Hammer
January 1999
Reduced Voltage Motor Control
Solid-State Motor Starters
J4-15
Typical Specifications
7. Three-phase current sensing via current
transformers for closed loop control to
insure motor stability shall be provided.
8. The logic board shall use quick disconnect plug-in connectors for current transformer inputs, line-and-load voltage
inputs, SCR gate firing output circuits and
status panel.
9. The logic circuitry shall include as a
minimum:
a. Short-circuit electronic trip overcurrent protection. Time not to exceed
1/2 cycle
b. Inverse time running overcurrent
protection
c. Auxiliary trip circuitry
d. Gate firing circuit lockout protection
on trip
e. Fault relay lockout protection
f. 250% to 500% current limit adjustment
g. Minimum and maximum voltage
adjustments
h. Voltage stability adjustment.
10. The logic board soldering shall be treated
with a conformal protective coating
system.
11. The logic board shall include, as standard, current and motor slip sensing circuitry that continually monitor motor load
and regulate motor voltage to minimize
motor kWh energy consumption.
12. The solid-state logic shall provide phase
sequence protection.
13. External interface circuitry shall include
120-volt relay logic interface capability.
14. Tripped functions shall be designed to be
cleared by removing power from the
solid-state logic board.
15. The starter shall have additional features
as follows:
a. Individual light emitting diodes (LEDs)
to indicate run, undervoltage, phase
loss, phase current unbalance, overcurrent trip, overtemperature, current
limit, end of ramp, and incorrect phase
rotation
b. Single-phase protection with built-in
short time delay
c. Undervoltage protection with built-in
short time delay
d. The power section shall have metal
oxide varistor (MOV) type surge suppressors across the SCRs rated 10%
above the rated voltage. The power
semiconductors shall be rated with
peak inverse voltage at least 2.5 times
SCR rated line-to-line voltage. Suitably
rated snubbers for voltage suppression shall be included.
e. 100% to 120% full load running current trip adjustment
CAT.71.01.T.E
f. 200% to 500% current limit adjustment.
16. Two (2) ground lugs shall be furnished,
one (1) for incoming and one (1) for outgoing ground connections.
17. Power terminations shall consist of
pressure-type terminals for top or bottom
entrance.
18. Enclosure
a. Unit shall be supplied as an [open
panel] [NEMA 1 enclosed] [NEMA 12
enclosed]
b. Enclosures shall not be less than 16gauge steel. Type 12 enclosures shall
be of welded construction with gasketed heat sink and doors
c. Doors shall include plastic device
holders for mounting up to six (6)
(eight (8) for above 200 hp motors)
operator devices
d. The following shall be included:
1. The operating handle of the disconnect, when supplied, shall
always remain connected to the
breaker or switch. The operating
handle shall not be mounted on
the door of the enclosure, but on
the controller for safe “standaside” operation. The position of
the operating handle will indicate
ON or OFF position of switch or
circuit breaker and include provision for padlocking in the OFF
position.
2. Interlock provisions shall prevent
unauthorized opening or closing of
the starter door with the disconnect in the ON position.
3. The structure, when floor-mounted,
shall be provided with adequate
lifting means and shall be capable
of being rolled or lifted into installation position and bolted to the
floor.
4. A door-mounted status panel shall
provide individual light emitting
diodes (LEDs) to indicate run,
undervoltage, phase loss, phase
current unbalance, overcurrent
trip, overtemperature, current
limit, end of ramp, and incorrect
phase rotation.
19. Units enclosed in motor control centers
shall be of the same manufacturer as that
of the circuit breaker and motor control
center for coordination and design issues.
20. The manufacturer of the solid-state
starter shall employ a field-based factory
service organization for the purpose of
start-up and repair of units. Third party
service contractors are not acceptable.
21. Maximum continuous operation shall be
at 120% of base amp rating.
Reduced Voltage Bypass Motor
Starter Type EA
1. Motor starter shall be Cutler-Hammer
type EA.
2. The solid-state reduced voltage starter
shall be UL and CUL listed and consist of
an SCR based power section, logic board
and paralleling bypass contactor.
3. The SCR based power section shall consist of six (6) back-to-back SCRs and shall
be rated for a minimum peak inverse voltage rating of 1500 volts PIV.
4. Units using triacs or SCR/diode combinations shall not be acceptable.
5. Resistor/capacitor snubber networks shall
be used to prevent false firing of SCRs
due to dv/dt effects.
6. The logic board shall be mounted for
ease of testing, service and replacement.
It shall have quick disconnect plug-in connectors for current transformer inputs,
line and load voltage inputs and SCR gate
firing output circuits.
7. The logic board shall be identical through
all ampere ratings and voltage classes
and shall be conformally coated to protect for environmental concerns.
8. The paralleling bypass contactor shall
energize when the motor reaches full
speed and close/open under one (1) times
motor current.
9. The contactor shall be fully rated for
across-the-line starting duty should this
be desired.
10. The contactor shall utilize an energy balanced contact closure to limit contact
bounce and an intelligent coil controller
to optimize coil voltage during varying
system conditions.
11. The coil shall have a lifetime warranty.
12. The overload protection shall be electronic and be based on an inverse timecurrent algorithm.
13. Overload protection shall be adjusted via
logic board.
14. Class 10 or 20 overload characteristic
shall be selectable.
15. Units using bimetal overload relays are
not acceptable.
16. Overtemperature protection (on heat
sink) shall be standard.
J
J4-16
Reduced Voltage Motor Control
Solid-State Motor Starters
Cutler-Hammer
January 1999
Typical Specifications
17. The solid-state logic shall be phase sensitive, and shall inhibit starting on incorrect
rotation.
18. Improper phase rotation shall be indicated on the starter logic board.
19. Starters shall protect against a phase
loss/unbalance condition shutting down if
a 35% current differential between any
two phases is encountered.
20. A normally open (NO) contact shall
annunciate fault conditions, with contact
ratings of 60 VA (resistive load) and 20 VA
(inductive load). In addition, an LED display on the logic board shall indicate type
of fault (current trip, phase loss, phase
rotation).
21. The following logic board adjustments
are required:
a. Ramp Time; 1 to 45 seconds, on a
hexadecimal switch
b. Initial Torque; 100 to 200% current, on
a hexadecimal switch
c. Current limit; 100 to 500% current, on
a hexadecimal switch
d. FLA of motor; 4 to 1 range of starter,
on a DIP switch.
22. Optional smooth stopping shall provide a
linear voltage deceleration should the
load require it. It is to be adjustable from
1 to 75 seconds.
24. Starters and breakers/HMCPs are to rated
per UL 508D for a withstand rating of 65
kAIC RMS.
25. Units enclosed in motor control centers
shall be of the same manufacturer as that
of the circuit breaker and motor control
center for coordination and design issues.
26. The manufacturer of the solid-state
starter shall employ a field-based factory
service organization for the purpose of
start-up and repair of units. Third party
service contractors are not acceptable.
27. Maximum continuous operation shall be
at 115% of continuous ampere rating.
23. Enclosed units shall include a thermal
magnetic circuit breaker or HMCP for
short-circuit protection and quick disconnect means.
J
For a complete product specification in
CSI format, see Cutler-Hammer Product
Specification Guide, section 16481.
CAT.71.01.T.E