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SXB Phase sequence and phase failure protective relay
General
SXB1 and SXB2 series adopt SMT technology, with compact volume, reliable quality and stable performance. It is able to cut off the power supply when the power comes across failures such as under-voltage, open-phase, fault-phase or other faults.
Features
1. Compact volume, SMT technology, reliable quality, stable performance.
2. Adoption of standard din rail or screw fixing installation.
3. Suitable voltage range AC380V±10% or AC 200-500V.
4. Select corresponding contact materials according to the difference of inductive loads and resistance loads.
5. Stable and reliable operation
Application
1. Control of movable equipment (field devices, agricultural use equipment, refrigerated wagon)
2. It prevents the equipment from reverse running, guarantees personal safety (hoisting, transportation, elevator, escalator, etc.)
3. Sensitive three-phase power control.
4. It prevents the driving loads from danger (open-phase)
5. Switching of normal/emergency power
Operating principle
The monitored three-phase power supply is connected with the R, S and T terminals of relay.
It is unnecessary to provide a separate power supply to SXB series relay, they supply the power automatically through the terminals R, S and T. Phase sequence monitoring and open-phase detection (ALL modes of SXB1, SXB2 and SXB3) The relay attracts when the terminals are electrified, if the phase sequence is proper and all three phases are electrified, the green LED lamp goes on. The relay attracts under normal working conditions (fault free). The power supply of relay will be cut off if there is open-phase fault or when the phase sequence is improper. If phase lack, the power must be cut off.
Main electric parameters
Type |
SXB1-380S |
SXB2-200S |
SXB1-380C |
SXB2-200C |
SXB3-380W |
Rated voltage |
380±10%V AC |
200-500V AC |
380±10%V AC |
200-500V AC |
380±10%V AC |
Rated frequency |
50/60Hz±1Hz |
50/60Hz±1Hz |
50/60Hz±1Hz |
50/60Hz±1Hz |
50/60Hz±1Hz |
Output Contact |
2NO.2NC |
2NO.2NC |
2NO.2NC |
2NO.2NC |
1NO.1NC |
Contact Material |
Agsno2 |
Agsno2 |
Agcdo |
Agcdo |
Agsno2 |
Contact Life |
20million |
20million |
20million |
20million |
20million |
Operating temperature |
-45°C~+85°C |
-45°C~+85°C |
-45°C~+85°C |
-45°C~+85°C |
-45°C~+85°C |
With unequal values |
≤10% |
≤10% |
≤10% |
≤10% |
≤10% |
Insulation voltage rating |
2.5KV/1mn/1mA/50Hz |
2.5KV/1mn/1mA/50Hz |
2.5KV/1mn/1mA/50Hz |
2.5KV/1mn/1mA/50Hz |
2.5KV/1mn/1mA/50Hz |
Protection level |
IP40 |
IP40 |
IP40 |
IP40 |
IP40 |
Contact capacity |
5A280V(AC)/8A30V(DC) |
5A280V(AC)/8A30V(DC) |
5A280V(AC)/8A30V(DC) |
5A280V(AC)/8A30V(DC) |
5A280V(AC)/7A30V(DC) |
SXB3-380W Connection diagram
Information about phase-sequence protection relay
1. This product is the controller with temperature(PTC) and phase-sequence control
2. If the motor is overheat, the relay is switched off.
3. If the relay is subject to the out of phase, it is switched off.
4. If not use PTC input, it must be shorted.
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