Static Transfer Switch (STS)

Superior Reliability

• Redundant auxiliary power, control board, fan and optional output breaker prevent single points of failure
• Layered security and intelligent breaker interlock design prevents improper operation
• Dual generator capability and preferred source selection

Easy Management

• Load management includes selective load inhibition and load shedding input
• 10’’ color display with touchscreen graphical interface
• Analyzes power source and load data with pre-/post-event data capture. Supports 5000+ event log and waveform records for detailed analysis
• Features Modbus and inbuilt SNMP card for remote monitoring and control
• Provides email notifications for user-defined events
• Time-stamped history and event logs
• Intelligent breaker interlock design to avoid improper operation

Simple Maintenance

• IR scan window for easy thermal measurement
• Hot-swappable auxiliary power and control board for low MTTR
• Fully front access and compartmentalized electrical components ensure easy and safe access

1. Model
2. STS-800A, STS-1250A⁽¹⁾, STS-1800A
3. Number of Poles: 4

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5. Input
6. Nominal Voltage: 380/400/415 Vac, 3P4W+PE
7. Voltage Range: 342-456 Vac
8. Frequency Range: 60 ± 0.5 Hz (default)/ 50 ± 0.5 Hz
9. Source Voltage Distortion: Up to 10% THD

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11. Output
12. Nominal Voltage: 380/400/415 Vac
13. Frequency: 50 ± 0.5 Hz (default)/ 60 ± 0.5 Hz
14. Transfer Time: < 4 ms (synchronous sources). Meet ITIC curve.
15. Overload Capability: 101-125%: 30 mins, 126-150%: 2 mins, 151-500%: 0.25 secs
16. Short Circuit Withstand Current: 65 kA
17. Current Crest Ratio: 3.5:1

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19. Efficiency
20. Online Mode: > 99%

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22. Communication Interface
23. Display: 10-inch color LCD touchscreen
24. Port: USB type A x1, USB type B x2, RS-232 x2, Ethernet Port x1, Input dry contact x4, Output dry contact x6
25. Protocol: SNMP, Modbus TCP, HTTP, HTTPS

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27. Physical
28. Dimensions (W x D x H):
    ⦁ STS-800A: 1212 x 905 x 2200 mm
    ⦁ STS-1250A: 2105x 911x 2188 mm
    ⦁ STS-1800A: 2100 x 855 x 2165 mm
29. Net Weight:
    ⦁ STS-800A: 1010 kg
    ⦁ STS-1250A: To be released
    ⦁ STS-1800A: 2014 kg

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31. Environment
32. Operating Temperature: 0 to 40°C
33. Humidity: 0-95% (non-condensing)
34. Altitude: 0-1200 m
35. Storage Temperature: -40 to 80°C
36. Ingress Protection Level:
    ⦁ STS-800/1250A: IP31
    ⦁ STS-1800A: IP20

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38. Conformance
39. Safety: CE, IEC 62310-1
40. Surge Protection: ANSI C62.41 Cat B3
41. Sustainability: RoHS, REACH
42. Vibration: ISTA-3B

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44. All specifications are subject to change without prior notice.
45. (1) Upcoming product