STC™ Starting Torque Controller
| Product Overview |
|
Bulletin 154 — Smart Motor Controllers — STC Starting Torque Controller
The STC Starting Torque Controller is a compact, simple-to-use, solid-state controller designed for low horsepower squirrel-cage induction motors. It is intended to relieve the starting torque surge encountered in typical across-the-line starting. This will allow for smoother starts and decreased equipment downtime due to shock and vibration problems.
The STC Controller is available in three current rated sizes: 11, 16, and 22 A. It is offered in four voltage ranges: 100…120, 200…230, 380…460, and 500…575V, 50/60 Hz.
The STC Controller is intended to operate in conjunction with an electromechanical motor starter.
- 11…22 A ratings
- Reduces starting torque surges
Standards Compliance and Certifications
Standards Compliance
UL 508
CSA C22.2 No.14
EN/IEC 60947-1
EN/IEC 60947-4-2
Certifications
cULus Listed (Open Type) (File No. E96956, Guides NMFT, NMFT7)
CE Marked (Open Type) per EMC and Low Voltage Directive
Cat. No. Explanation
| 154 | – | A11 | N | B | ||
| a | b | c | d |
| a | |
| Bulletin Number | |
| Code | Description |
| 154 | Solid-State Controller |
| b | |
| Controller Rating | |
| Code | Description |
| A11 | 11 A, 1…7.5 Hp @ 460V AC |
| A16 | 16 A, 1…10 Hp @ 460V AC |
| A22 | 22 A, 1…15 Hp @ 460V AC |
| c | |
| Enclosure Type | |
| Code | Description |
| N | Open |
| d | |
| Input Line Voltage | |
| Code | Description |
| A | 200…230V, 50/60 Hz |
| B | 380…460V, 50/60 Hz |
| C | 500…575V, 50/60 Hz |
| L | 100…120V, 50/60 Hz |
Product Selection
| Build a Catalog Number |
Single-Phase Selection — Open Type
| Current Rating [A] | kW | Hp | Cat. No. |
| 110…120V AC, 50/60 Hz | |||
| 11 | 0.75 | 1/2 | 154-A11NL |
| 16 | 1.1 | 1 | 154-A16NL |
| 22 | 1.5 | 1-1/2 | 154-A22NL |
| 200…230V AC, 50/60 Hz | |||
| 11 | 1.5 | 1-1/2 | 154-A11NA |
| 16 | 2.2 | 2 | 154-A16NA |
| 22 | 3 | 3 | 154-A22NA |
Three-Phase Selection — Open Type
| Current Rating [A] | kW | Hp | Cat. No. |
| 200V AC, 60 Hz | |||
| 11 | 3 | 3 | 154-A11NA |
| 16 | 4.5 | 3 | 154-A16NA |
| 22 | 6 | 5 | 154-A22NA |
| 230V AC, 50/60 Hz | |||
| 11 | 2.2 | 3 | 154-A11NA |
| 16 | 4 | 5 | 154-A16NA |
| 22 | 5.5 | 7-1/2 | 154-A22NA |
| 380…460V AC, 50/60 Hz | |||
| 11 | 4 | 7-1/2 | 154-A11NB |
| 16 | 7.5 | 10 | 154-A16NB |
| 22 | 11 | 15 | 154-A22NB |
| 500…575V AC, 50/60 Hz | |||
| 11 | 5.5 | 10 | 154-A11NC |
| 16 | 7.5 | 10 | 154-A16NC |
| 22 | 11 | 20 | 154-A22NC |
Specifications
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Typical Across-the-Line Response
The figure above shows how starting torque surge during motor startup can cause damage to the motor and to driver equipment.
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STC Response
The figure above shows how the STC controller is effective in decreasing the magnitude of starting torque surges.
| Electrical Ratings | |||||
| Cat. No. | 154-A11… | 154-A16… | 154-A22… | ||
| Rated Operating Current | [A] | 11 | 16 | 22 | |
| Maximum Heat Dissipation | [W] | 15 | 18 | 24 | |
| Power Section | Back-to-back SCR(s) | ||||
| Rated Operational Voltage (+10%, –15%) | 100…120, 200…230V AC, 50/60 Hz, 1-phase, or 200…230, 380…460, 500…575V AC, 50/60 Hz, 3-phase |
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| Cable Size | Power Terminals | 1.5…6 mm2 (14…12 AWG) | |||
| Thermal Capacity | IEC 34 (S1), NEMA MG 1 | ||||
| Electrical Design Specifications/Test Requirements | |||||
| Repetitive Peak Inverse Voltage Rating | 1400V up to 480V Line 1600V up to 600V Line |
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| Selectable Start Times Selectable Initial Torque Settings |
0.1…4.5 s 10…80% Locked Rotor Torque |
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| Noise and RF Immunity | Surge Transient Peak 3400V. Showering Arc 1500V | ||||
| DV/DT Protection | RC Snubber Network | ||||
| Mechanical Design Specifications/Test Requirements | |||||
| Vibration | 2.5 G for 60 min | ||||
| Shock | 30 G for 11 ms | ||||
| Construction | Power Poles Control Metal Parts |
High-temperature thermoplastic moldings Thermoplastic moldings Anodized aluminum, plated brass or copper |
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| Terminals | Power Terminals Power Terminals Markings |
6.0 mm hole with clamping plate CENELEC EN50 012, NEMA |
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| Functional Design Specification | |||||
| Standard Features | Setup | Wiring Configuring |
The STC controller is wired in series with a motor starter. The STC controller is configured with rotary digital switches. |
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| Starting | From an initial torque setting, the STC controller increases the voltage gradually during the acceleration period until full voltage is achieved. |
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| Running | Protection | Motor overload protection is provided by the overload relay as part of the motor starter. | |||
| Environmental | |||||
| Temperature | Operating Storage |
0…+50 °C (32…122 °F) –40…+85 °C (–40…+185 °F) |
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| Altitude | 2000 m (6560 ft) | ||||
| Humidity | 5…95% RH (non-condensing) | ||||
Approximate Dimensions
Dimensions are shown in millimeters (inches). Dimensions are not intended to be used for manufacturing purposes.
11 A Controller
|
16…22 A Controller
|
Open Type
| Controller | A Width |
B Height |
C Depth |
D | E | F | G | H | Approx. Ship. Wt. |
| 11 A | 75 (2-61/64) |
111 (4-23/64) |
77 (3-1/32) |
— | 60 (2-23/64) |
90 (3-35/64) |
7.5 (19/64) |
10 (3-35/64) |
2 kg (4.5 lbs) |
| 16 A | 122 (4-13/16) |
127 (5) |
101 (3-31/32) |
24 (15/16) |
110 (4-21/64) |
90 (3-35/64) |
6 (1/4) |
18.5 (3/4) |
2.25 kg (5 lbs) |
| 22 A | 154 (6-1/16) |
180 (7-3/32) |
127 (5) |
50 (1-31/32) |
140 (5-33/64) |
140 (5-33/64) |
7 (9/32) |
20 (25/32) |
3.15 kg (7 lbs) |