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WST-3EZ
Winston
■ Compact Design
■ MCU( Microprocessor Control Unit ) Based
■ Three Integral Current Transformers
■ Multiple Protection Functions
■ Digital Ammeter/3 Phase Current Display
■ Troubleshooting/Trip Cause Memory, Display
■ Adjustable Operating Features by Mode switch
■ Wide Current Adjustment Range
■ Selectable Time-Current Characteristics(Inverse/Definite)
■ Manual(Instantaneous)/Electrical(Remote)Reset
■ Test Function
■ Ambient Insensitive
■ Selectable Fail-safe and Non-fail-safe Operation Modes
■ Inverter (20~400Hz)
1. over current
2. phase loss
3. locked rotor
4. phase reversal
5. phase unbalance
6. 3 phase monitor
7. under current
8. ground fault
| Protective Item | Trip Time |
| Over-current | DEF:0.2~30 sec, INV:1~30 class |
| Under-current | 0.5~30 sec |
| Phase Loss | Within 3 sec |
| Phase Unbalance | within 8 sec |
| Phase Reversal | 0.1~0.3 sec |
| Locked Rotor | Lock : within 0.5sec after D-time(in DEF set) Stall : 0.05 ~ 10sec (in DEF set) |
| Current Range | Over-Current(oc) | 0.5~960A(Over 60A with External CTs) | |
| Under-Current(uc) | 0.5~59A/OFF(Over 60A with External CTs) | ||
| Ground Fault | 0.02~3A | ||
| Time Setting Range (O-TIME) | Start Delay Time (D-TIME) | 1~200sec (Definitive) | |
| Trip Delay Time Setting (O-TIME) | INV | 1-30 | |
| DEF | 0.2-30 sec | ||
| Control Voltage | 110VAC±15%, 220VAC±15%, 24VAC/DC | ||
| Output Relay | OC/UC | 2-SPST, 3A/250VAC Resistive | |
| GR | 1-SPST,3A/250VAC Resistive | ||
| Time Characteristic | In/"tc"mode | Inverse | |
| dE/"tc"mode | Definite | ||
| Trobleshooting/Trip Indication | LED Display(3 Trip causes memory) | ||
| Current Sensing | 3-CT | ||
| Mounting | 35mm DIN-Rail/Panel | ||
■ Compact Design
■ MCU( Microprocessor Control Unit ) Based
■ Three Integral Current Transformers
■ Multiple Protection Functions
■ Digital Ammeter/3 Phase Current Display
■ Troubleshooting/Trip Cause Memory, Display
■ Adjustable Operating Features by Mode switch
■ Wide Current Adjustment Range
■ Selectable Time-Current Characteristics(Inverse/Definite)
■ Manual(Instantaneous)/Electrical(Remote)Reset
■ Test Function
■ Ambient Insensitive
■ Selectable Fail-safe and Non-fail-safe Operation Modes
■ Inverter (20~400Hz)
1. over current
2. phase loss
3. locked rotor
4. phase reversal
5. phase unbalance
6. 3 phase monitor
7. under current
8. ground fault
| Protective Item | Trip Time |
| Over-current | DEF:0.2~30 sec, INV:1~30 class |
| Under-current | 0.5~30 sec |
| Phase Loss | Within 3 sec |
| Phase Unbalance | within 8 sec |
| Phase Reversal | 0.1~0.3 sec |
| Locked Rotor | Lock : within 0.5sec after D-time(in DEF set) Stall : 0.05 ~ 10sec (in DEF set) |
| Current Range | Over-Current(oc) | 0.5~960A(Over 60A with External CTs) | |
| Under-Current(uc) | 0.5~59A/OFF(Over 60A with External CTs) | ||
| Ground Fault | 0.02~3A | ||
| Time Setting Range (O-TIME) | Start Delay Time (D-TIME) | 1~200sec (Definitive) | |
| Trip Delay Time Setting (O-TIME) | INV | 1-30 | |
| DEF | 0.2-30 sec | ||
| Control Voltage | 110VAC±15%, 220VAC±15%, 24VAC/DC | ||
| Output Relay | OC/UC | 2-SPST, 3A/250VAC Resistive | |
| GR | 1-SPST,3A/250VAC Resistive | ||
| Time Characteristic | In/"tc"mode | Inverse | |
| dE/"tc"mode | Definite | ||
| Trobleshooting/Trip Indication | LED Display(3 Trip causes memory) | ||
| Current Sensing | 3-CT | ||
| Mounting | 35mm DIN-Rail/Panel | ||
