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SEQ SERIES ELECTRIC CHAIN HOISTS
DUAL SPEED (VFD CONTROL)

SEQ010SD
SEQP010SD
SEQG010SD
SEE BELOW FOR PRICES, SPECIFICATIONS AND DIMENSIONS


V A R I A B L E F R E Q U E N C Y D R I V E – V F D
(INVERTER FOR SMOOTH TRANSITIONAL SPEED)
The dual speed inverter delivers smoother movement than contactor control which reduces load swing. The inverter
can be programmed to operate specific to the application, resulting in smooth starts, improved control, improved
positioning accuracy and overall increased productivity. Standard lifting speed ratio is 6:1. Standard traversing speed
ratio is 6:1 adjustable to 10:1.

A no-load high-speed function is a standard feature, allowing its hoisting speed to move 1.3 times faster during no-load
operation. When the no-load condition is detected by the inverter, this function is activated automatically switching to
high-speed operation, leading to improved work efficiency with ease and safety. The function is easily activated
(ON/OFF) with the push button control.

EQ, EQM and SEQ inverter units are well-customized for lifting/traversing applications including exclusive software,
and are also provided with measures against impact and heat, which were verified through long-run tests.
Product Code for SEQ Series
SEQ Electric Chain Hoist Hook or Suspension Bar Mount
SEQ Series single-phase dual speed (VFD Control) electric chain hoists are designed for
easy installation and operation in medium- and heavy-duty industrial applications. These
hoists have an extremely compact and lightweight body and are perfect for any work station
application. The SEQ hoist includes a no-load high-speed function that automatically
increases hoist speed up to 130 percent when the load is less than 30 percent of working
load limit.
Standard Hoist Specifications
Capacity Range - 1/8 Ton – 1 Ton
Standard Voltage - 115/230-1-60
Control Voltage - 24V
Duty Cycle* - 30/10 Min.
Classification* - ASME H4 ISO 1/8-1/2T M6; 1T M5 FEM 1/8-1/2T 3m; 1T 2m
Conformance - UL 508, 508A, 1004 CSA C22.2 NO. 33, 14-13, 66
Ratings - Hoist – IP55, Pendant – IP65
Chain Falls - Single chain fall all capacities
Standard Lift - 10' (longer lifts available)
Standard Pendant Drop - 4' less than lift (longer drops available)
Standard Power Supply Length - 15' (longer lengths available)
Mounting - Hook, suspension bar or trolley
Standard Pendants - 2-button (momentary contacts) with emergency On/Off (maintained
contacts)
Chain Containers - Standard plastic
Operating Conditions - Recommended for -4° to +104° F and humidity of 85% or less
SEQ010SD
Features and Benefits
Pull-Rotor Motor Brake - Extremely durable and reliable, this advanced design contains no brake coil to fail like
conventional disc brakes.
External Motor Fan - Functions to quickly eliminate resistor, motor and brake heat. This results in improved hoist
duty rating and greatly lengthens brake life. Motor is totally enclosed, fan cooled (TEFC).
Precision Machined Helical Gears - Immersed in oil bath lubrication results in quiet, smooth and cool operation.
Chain Container - Durable plastic containers are standard.
Corrosion Resistant Load Chain - Nickel-plated, Grade 80, DIN chain for superb durability and strength.
Forged Carbon Steel Hooks - Under excessive loads will open gradually and not fracture. Ball bearings produce
smooth rotation. Bottom hook will swivel 360°. Heavy-duty hook latches are standard.
Optional Suspension Bar - For low headroom or enclosed track trolley applications. Easily changed from top hook
to suspension bar.
Compact Aluminum Body - Die-cast body is lightweight and offers low headroom – one of the best in the industry.
Paint is electrostatically applied.
Completely Sealed Body- Suitable for both indoor and outdoor applications, including harsh environments. (Consult
Owner’s Manual for details.) Gaskets throughout the hoist provide for an IP55 rating.
Variable Frequency Drive (VFD) - Dual speed controls via “under-the-cover” variable frequency drive for both
single-phase and three-phase hoists. VFD includes count hour meter, load limiter and no-load high-speed function.
Long Life Friction Clutch - Protects hoist from damage and prevents overwinding.
Upper/Lower Limit Switch - Low profile upper and lower limit switches provide excellent headroom.
Unique Chain Guide - Provides quiet and smooth guiding of chain. Heavy cast iron construction for improved wear
versus stamped steel design offered by many manufacturers.
Durable Push Button Pendant - Easy-to-use, one-handed operation. Rated IP65. Standard control voltage is 24V.
Strain relief wire is molded to pendant cord for added support and dependability. E-Stop is standard on all pendants.
Extreme Duty Motor - Increased performance through 30/10-minute duty rating, H4 classification, Class B insulation,
cooling fins and external thermal motor protection.
Load Sheave - Five deep-groove pockets fully support the load chain during operation. Reduces vibration and chain
wear. Provides true vertical lift.
Operating Conditions - Recommended for -4° to +104°F and humidity of 85% or less.
SEQ 1 - PHASE DUAL SPEED VFD HOIST - SPECIFICATIONS
Cap.
(Tons)
Model
No.
 Std
Lift
(Ft)
Push
Button
Cord
L
(ft)
Hoist¹ 1-Phase 60 Hz
Load
Chain
Dia.
(mm)
x Chain
Fall Lines
Net
Wt.
(lbs.)
Wt. for
Additional
1 Foot of
Lift (lbs)
Lifting Speed² (ft/min)
Output
(Hp)
Rated Current (amps)
High
Low
No
Load
High
Speed
@115V
@230V
1/8
SEQ001SD
10
8.2
56
9.3
72
0.67
10.8
5.7
5.6 x 1
71
0.48
1/4
SEQ003SD
33
5.5
43
12.1
6.4
1/2
SEQ005SD
25
4.2
32
1.0
14.6
7.8
75
1
SEQ010SD
17
3.9
22
1.3
18.7
9.9
7.1 x 1
97
0.77
¹) Hoists are voltage re-connectable between 115/230V
²) Speeds are adjustable between low and high speed
SEQ 1 - PHASE DUAL SPEED VFD HOIST - DIMENSIONS
Cap.
(Tons)
Model
No.
Headroom C (in)
D (in)
a
(in)
b
(in)
d
(in)
e
(in)
f
(in)
g
(in)
h
(in)
I
(in)
Top
Hook
Susp.
Bar
Top
Hook
Susp.
Bar
1/8
SEQ001SD
17.3
15.6
21.0
19.1
16.4
14.4
9.1
7.4
11.7
1.1
5.4
5.0
1/4
SEQ003SD
1/2
SEQ005SD
18.0
16.1
1
SEQ010SD
20.7
18.3
23.5
21.1
17.0
15.9
9.6
13.1
1.2
6.1
5.6

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PRICES FOR EQ SERIES with Plastic Chain Container (Top Hook or Suspension Bar)
Cap.
(Tons)
Model
No.
Lift
Spd
(FPM)
Price - Standard Lifts Max. Lift
w/Plastic Chain Cont.
Load
Chain
Push
Button
Cord
Total Wt. 10'
lift
(lbs.)
10'
15'
20'
1/8 SEQ001SD 56/9 $2,173 $2,276 $2,378 20 $14.05 $6.48 $20.52 71
1/4 SEQ003SD 33/6 $2,292 $2,395 $2,497 20 $14.05 $6.48 $20.52 71
1/2 SEQ005SD 25/4 $2,432 $2,535 $2,637 20 $14.05 $6.48 $20.52 75
1 SEQ010SD 17/4 $2,713 $2,830 $2,946 20 $16.89 $6.48 $23.37 97
Standard pendant hangs approximately 4 ft. above the hoist's fully extended bottom hook.
For lifts or push button cord lengths other than standard, use 10 ft. base price plus adders for load chain and push button cord.
For lift and pendant length limitations, consult us.
Standard power supply cord is 15 ft. Extra per ft. is $6.28.
Cable support hangers included for every 5 ft. of power supply cord.
Thermal protection is standard.
*Top hook suspension is standard. Suspension bar is available as an option at no charge.
PRICES FOR Optional Longer Lift Canvas Chain Containers
Cap. (Tons)
Model No.
Prices
Maximum Lift (ft.)
1/8-1/2
EQ1CI1405
49
SEQP and SEQG Electric Chain Hoists with Push or Geared Trolleys
Mounting the SEQ Series single-phase dual speed
(VFD Control) electric chain hoist to our PT push or GT
geared trolley will create an easy and economical method of
transporting the load. This combination is ideal for work-
stations and infrequent moves.
Standard Hoist Specifications
Capacity Range - 1/8 Ton – 1 Ton
Shafts - Standard shafts fit wide range Longer shafts for
wider beams Spacers for easy adjustments
Drop Stops - Standard
Bumpers - Optional
Standard Hand Chain Drop - On geared trolleys 2' less
than lift (longer drops available)
Wheels - All steel. Sealed ball bearings. Fit flat or tapered
beam flange
Standard Hoist Pendant Drop - 4' less than lift (longer
drops available)
Standard Hoist Power Supply Length - 15' (longer lengths
available)
Standard Pendants - 2-button (momentary contacts) with
emergency On/Off (maintained contacts)
SEQP010SD
SEQG010SD
Features and Benefits
Pull-Rotor Motor Brake - Extremely durable and reliable, this advanced design contains no brake coil to fail like
conventional disc brakes.
External Motor Fan - Functions to quickly eliminate resistor, motor and brake heat. This results in improved hoist
duty rating and greatly lengthens brake life. Motor is totally enclosed, fan cooled (TEFC).
Precision Machined Helical Gears - Immersed in oil bath lubrication results in quiet, smooth and cool operation.
Chain Container - Durable plastic containers are standard.
Corrosion Resistant Load Chain - Nickel-plated, Grade 80, DIN chain for superb durability and strength.
Forged Carbon Steel Hooks - Under excessive loads will open gradually and not fracture. Ball bearings produce
smooth rotation. Bottom hook will swivel 360°. Heavy-duty hook latches are standard.
Compact Aluminum Body - Die-cast body is lightweight and offers low headroom – one of the best in the industry.
Paint is electrostatically applied.
Completely Sealed Body- Suitable for both indoor and outdoor applications, including harsh environments. (Consult
Owner’s Manual for details.) Gaskets throughout the hoist provide for an IP55 rating.
Variable Frequency Drive (VFD) - Dual speed controls via “under-the-cover” variable frequency drive for both
single-phase and three-phase hoists. VFD includes count hour meter, load limiter and no-load high-speed function.
Long Life Friction Clutch - Protects hoist from damage and prevents overwinding.
Upper/Lower Limit Switch - Low profile upper and lower limit switches provide excellent headroom.
Unique Chain Guide - Provides quiet and smooth guiding of chain. Heavy cast iron construction for improved wear
versus stamped steel design offered by many manufacturers.
Durable Push Button Pendant - Easy-to-use, one-handed operation. Rated IP65. Standard control voltage is 24V.
Strain relief wire is molded to pendant cord for added support and dependability. E-Stop is standard on all pendants.
Extreme Duty Motor - Increased performance through 30/10-minute duty rating, H4 classification, Class B insulation,
cooling fins and external thermal motor protection.
Load Sheave - Five deep-groove pockets fully support the load chain during operation. Reduces vibration and chain
wear. Provides true vertical lift.
Operating Conditions - Recommended for -4° to +104°F and humidity of 85% or less.
SEQ 1 - PHASE DUAL SPEED VFD HOIST WITH PUSH OR GEARED TROLLEY - SPECIFICATIONS
Cap.
(Tons)
Model
No.
Std
Lift
(Ft)
Push
Button
Cord
L
(ft)
Hoist¹ 1-Phase 60 Hz Flange Width Adjustability³
B (in)
Min.³*
Allow
Radius
for
Curve
(in)
Load
Chain
Dia
(mm) x Chain
Fall
Lines
Net
Wt.*
(lbs.)
Wt.
for
Additional
1 Foot
of Lift
(lbs)
Lifting Speed² (ft/min) Output
(Hp)
Rated Current (amps)
High Low No
Load
High
Speed
@115V @230V Standard Optional
1/8 SEQ(P/G)001SD 10 8.2 56 9.3 72 0.67 10.8 5.7 2.28 to
4.00
(2.28
to
5.00)
4.01 to 8.00
(5.01 to
8.00) or
8.01 to
12.00
43.3
(51.2)
5.6 x 1 75
(97)
0.48
75
(99)
12.1 6.4 79
(104)
1/4 SEQ(P/G)003SD 33 5.5 43
25 4.2 32 1.0
14.6
7.8
2.28 to 5.00 5.01 to
8.00 or
8.01 to
12.00
51.2 7.1 x 1 108
(123)
0.77
1/2 SEQ(P/G)005SD
1 SEQ(P/G)010SD 17 3.9 22 1.3 18.7 9.9
¹) Although different voltages are shown, motors are NOT re-connectable and voltage can NOT be changed due to electrical com-
    ponents being voltage specific.
²) Speeds are adjustable between low and high speed.
³) Figures in parentheses are data for geared trolley if different than push trolley.

* Minimum Flange Width for curved beam: 1 Ton Push and 1/8 to 1 Ton Geared = 2.87 in.
SEQ 1 - PHASE DUAL SPEED VFD HOIST WITH PUSH TROLLEY - DIMENSIONS
Cap.
(Tons)
Model
No.
Headroom
C (in)
D
(in)
a
(in)
b
(in)
e
(in)
g
(in)
h
(in)
i
(in)
j
(in)
k
(in)
m
(in)
n
(in)
r
(in)
t
(in)
1/8 SEQP001SD 16.3 19.9 10.4 7.2 1.8 1.1 3.2 2.4 0.75 3.0 1.9 3.3 1.5 0.87
1/4 SEQP003SD
1/2 SEQP005SD 16.9
1 SEQP010SD 19.3 22.2 11.2 9.3 2.2 1.2 4.2 2.8 0.98 3.7 2.2 4.4 2.0 0.98
SEQ 1 - PHASE DUAL SPEED VFD HOIST WITH GEARED TROLLEY - DIMENSIONS
Cap.
(Tons)
Model
No.
Headroom
C (in)
D
(in)
E
(in)
a
(in)
b
(in)
e
(in)
g
(in)
h
(in)
i
(in)
j
(in)
k
(in)
k¹
(in)
m
(in)
n
(in)
r
(in)
t
(in)
u
(in)
1/8 SEQG001SD 16.7 20.3 10.5 20.9 9.3 13.3 1.1 4.2 2.8 1.1 3.7 4.2 2.2 4.4 2.0 0.98 7.2
1/4 SEQG003SD
1/2 SEQG005SD 17.3
1 SEQG010SD 19.3 22.2 1.2

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PRICES FOR SEQP SERIES with Plastic Chain Container (Push Trolley)
Cap.
(Tons)
Model
No.
Lift
Std
(FPM)
Price - Standard Lifts Max. Lift
w/Plastic Chain Cont.
Load
Chain
Push
Button
Cord
Total Wt. 10'
lift
(lbs.)
10'
15'
20'
1/8
SEQP001SD
56/9
20
$14.05 $6.48 $20.52
75
1/4
SEQP003SD
33/6
20
$14.05 $6.48 $20.52
75
1/2
SEQP005SD
25/4
20
$14.05 $6.48 $20.52
79
1
SEQP010SD
17/4
20
$16.89 $6.48 $23.37
108
PRICES FOR SEQG SERIES with Plastic Chain Container (Geared Trolley)
Cap. (Tons)
Model No.
Lift Std (FPM)
Price - Standard Lifts
Max. Lift w/Plastic Chain Cont.
Load Chain
Push Button Cord
Hand Chain
Total
Wt. 10' lift (lbs.)
10'
15'
20'
1/8
SEQG001SD
56/9
20
97
1/4
SEQG003SD
33/6
20
99
1/2
SEQG005SD
25/4
20
104
1
SEQG010SD
17/4
20
123
Standard pendant hangs approximately 4 ft. above the hoist's fully extended bottom hook.
For lifts or push button cord lengths other than standard, use 10 ft. base price plus adders for load chain and push button cord.
For lift and pendant length limitations, consult us.
Standard power supply cord is 15 ft. Extra per ft. is $6.28.
Cable support hangers included for every 5 ft. of power supply cord.
Thermal protection is standard.
Standard trolley hand chain drop is 2 ft. less than lift. (For Geared Trolley only)
Suspension bar is standard.
PRICES FOR Manual Trolley Shaft Extenders
Cap. (Tons)
Std. Flange Width (in.)
Flange Width w/Ext. Shaft (in.)
Prices
1/8-1/2
2.28-4.00
4.01-8.00
8.01-12.00
*1
2.28-5.00
5.01-8.00
8.01-12.00
For flange ranges beyond this chart, consult Customer Service.
Pricing applies only when purchased with PT or GT trolleys.
*Geared trolleys 1 Ton and under use 1 Ton shaft extender.
Options and Technical Data
SPEED COMPARISONS
VFD HOIST CONTROL DESCRIPTIONS
The dual speed inverter delivers smoother movement than contactor control which reduces load swing. The inverter can
be programmed to operate specific to the application, resulting in smooth starts, improved control, improved positioning
accuracy and overall increased productivity. Standard lifting speed ratio is 6:1. Standard traversing speed ratio is 6:1
adjustable to 10:1.

A no-load high-speed function is a standard feature, allowing its hoisting speed to move 1.3 times faster during no-load
operation. When the no-load condition is detected by the inverter, this function is activated automatically switching to
high-speed operation, leading to improved work efficiency with ease and safety. The function is easily activated
(ON/OFF) with the push button control.

EQ, EQM and SEQ inverter units are well-customized for lifting/traversing applications including exclusive software,
and are also provided with measures against impact and heat, which were verified through long-run tests.
Duty Classifications
The grade symbols are identical to those of ASME HST-1M. (Performance standard for Electric Chain Hoist)
This classification refers to ISO 4301-1 and applies to the mechanical components including gears and bearings except for consumable parts.
COMPLIANCE
These electric chain hoists are produced to comply with:
• CSA Std. C22.2 No 33-M1984 (R2004), “Construction and Test of Electrical Cranes and Hoists”
• CSA Std. C22.2 No 14-13, “Industrial Control Equipment”
• CSA Std. C22.2 No. 66.1-06 (R2011), “Low Voltage Transformer-Part I: General Requirements”
• ANSI/UL508 (17th Edition), “Industrial Control Equipment”
• ANSI/UL508A (First Edition), “Industrial Control Panels”
• ANSI/UL 1004 (First Edition), “Rotating Electrical Machines”
• ANSI/NFPA 70, “National Electrical Code”
• ANSI/ASME B30.16, “Safety Standard—Overhead Hoists (Underhung)”
• ANSI/ASME HST—1M, “Performance Standard for Electric Chain Hoists” manual and electric-powered trolleys are
  produced to comply with the trolley-related requirements of:
• OSHA Section 1910.179 of Title 29, “Occupational Safety and Health Regulations — Overhead and Gantry Cranes”
• ANSI/ASME B30.11, “Safety Standard—Monorails and Underhung Cranes”
• ANSI/ASME B30.17, “Safety Standard—Overhead and Gantry Cranes (Top Running Bridge, Single Girder,
   Underhung Hoist)”
Harrington SEQ Series Electric Hoist, SEQP Electric Hoist, SEQG Hoist, Three Phase Dual Speed, Chain Hoist, Chain Containers,
Electric Chain Hoists, Three Phase, Hook or Suspension Bar Mount, Electric Chain Hoist with Motorized Trolleys, Electric Chain
Hoists with Push or Geared Trolleys from your source for material handling equipment.

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