Home » Electric Motors and Components » Servo Motor » Siemens Burner Servomotor SQN91.140B2793
Siemens Burner Servomotor SQN91.140B2793
₹ 14,500 Get Latest Price
Product Specifications
| Brand | Siemens |
| Input Phase | Single Phase |
| Power | 230V |
| Voltage | 230 V |
| Usage/Application | INDUSTRIAL BURNER |
| Ambient Temp | $-20\text{°C}$ to $+60\text{°C}$ |
| Angular Adjustment | Max $160^\circ$ (standard range $0\dots 90^\circ$) |
| Application | SIEMENS - INDUSTRIAL BURNER |
| Availability | In Stock |
| Brand | Siemens |
| Direction of Rotation | Counter-clockwise (CCW) |
| Parameter | Specification |
| Power Consumption | Approx. $8\text{ VA}$ |
| Protection Class | IP40 |
| Duty Cycle | Intermittent ($60\%$) |
| Frequency | $50\dots 60\text{ Hz}$ |
| Mains Voltage | $230\text{V AC}$ (A27) or $115\text{V AC}$ (A17) |
| Model Name/Number | SQN SERIES |
| Motor Principle | Synchronous |
| Motor Type | AC |
| Number Of Phases | Single |
GST No - 24ANPPP5501P1ZH | Member since 2025
CTM CHAR RASTA, 31, YASH VIJAY SOCIETY, NATIONAL HIGHWAY, AMRAIWADI , CTM, Ahmedabad, Gujarat, 380026
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Product Details
The Siemens SQN91 is the Counter-Clockwise (CCW) rotating version of the SQN90 series. These actuators are designed to drive air or gas dampers on small to medium-sized burners, working in tandem with burner controls like the LME, LMO, or LGB. 1. SQN91 Model Variants The specific suffix (e.g., .204) determines the torque, running time, and internal wiring configuration. Model Rotation Running Time (90∘ at 50Hz) Starting Torque SQN91.204A27 CCW $12\text{ seconds}$ $2.4\text{ Nm}$ SQN91.240B27 CCW $4\text{ seconds}$ $0.8\text{ Nm}$ SQN91.564A27 CCW $24\text{ seconds}$ $3.0\text{ Nm}$ SQN91.570A27 CCW $24\text{ seconds}$ $3.0\text{ Nm}$ 2. Technical Specifications Parameter Specification Direction of Rotation Counter-clockwise (CCW) Mains Voltage $230\text{V AC}$ (A27) or $115\text{V AC}$ (A17) Frequency $50\dots 60\text{ Hz}$ Power Consumption Approx. $8\text{ VA}$ Duty Cycle Intermittent ($60\%$) Protection Class IP40 Ambient Temp $-20\text{°C}$ to $+60\text{°C}$ Angular Adjustment Max $160^\circ$ (standard range $0\dots 90^\circ$) 3. Key Functional DetailsThe Cam System The SQN91 uses a system of adjustable mechanical cams to control the burner's air stages: Red Cam: Defines the "High-Fire" (maximum) position. Blue Cam: Defines the "Low-Fire" (minimum) or "Closed" position. Orange/Black Cams: Auxiliary switches for "Ignition load" or releasing the second stage fuel valve. Manual Release A push-button on the housing allows you to decouple the motor from the gear train. This is critical during commissioning so you can manually check the mechanical linkage for binding without damaging the internal gears. 4. SQN90 vs. SQN91: The Vital Difference When ordering a replacement, the direction of rotation is the most critical factor: SQN90: Clockwise (CW) to open. SQN91: Counter-clockwise (CCW) to open. Warning: If you install an SQN91 where an SQN90 is required, the burner will drive the damper into the "Closed" stop when it is trying to "Open" for pre-purge, resulting in an "Air Pressure Failure" lockout. 5. Wiring Logic The SQN91 is available in different versions (A, B) based on how the internal microswitches are pre-wired: Version A: Standard 2-stage or 3-position control. Version B: Often used with specific controllers where the air damper is fully integrated into the burner's software sequence (e.g., LME22).
CTM CHAR RASTA, 31, YASH VIJAY SOCIETY, NATIONAL HIGHWAY, AMRAIWADI , CTM, Ahmedabad, Gujarat, 380026
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