General
UHA Series Hybrid Arc-less Contactor is the latest generation of electro-magnetic contactors. UHA has a built-in electronic detecting and controlling circuit with a by-pass Thyristor to form an extremely fast action that detects main-contacts opening movement then by-pass the circuit to the Thyristor within 10 milliseconds. The magic is at 100% accuracy! UHA can always by-pass the main-contacts at exact zero-degree-current-wave. But how? Speed is the key, detecting speed plus response time is much less than 1 cycle [66.7ms].
For ten of years, electrical maintenance engineers suffer many trouble shooting problem from traditional Electro-Magnetic Contactors due to noise, contacts deterioration, contacts welded and electrical coil burn out without any better solution. Now UHA brings the great solution to solve all these problems at a time. Required no any maintenance-check until 200,000 times operation. With UHA - you save energy, time and materials. You are a Green Energy user and executer.
Application
UHA contactor meets IEC Standard 60947-1 class AC-3 and AC-4 requirements, rated continuous current from 40A, 60A, 80A, 100A, 125A, 160A, 200A and maximum 250A. Best application of UHA is to replace traditional electro-magnetic contactors which create noise, contacts welded, shorter service life; and to replace silicon-switches which have over-heating risk, create harmonics and non-predicable burn-out.
Features
- Design to continuous service for 100,000 hours.
- Exact zero-degree by-pass arcing circuit.
- Mechanical bridge contacts, higher current ratings.
- Compact in size.
- Good for explosion-proof application.
- 3 phases synchronous operation, no unbalanced phasing risk.
- Low contacts resistance, save energy consumption.
- Low power DC-coil, no burn-out risk.
Theory of Operation
Thyristor by-pass the main-contact precisely at zero-degree-current-wave in a few millisecond upon opening-signed received. Precisely detect both voltage and current difference is the key to get 100% accuracy of by-pass action.
UHA Installation Instruction
- Environmental temperature range shall be: -40°C ~ +45°C
- Relative humidity shall be: less than 95%
- Pollution class: 3
- Installation class: 3 (III)
- Mounting surface angle: maximum ±5° incline.
- Mounting place sea level: < 2000M
- Mounting surface shall be free from: vibrating, moving, impacting.
- Main circuit is not designed for DC power interrupting.
- Application for paralleling power source or forward/reverse motor rotating, please contact us.
- Visual check label's printed ratings of voltage, power, frequency to meet field requirement.
- Special care inspection shall be taken while one of the following condition been found:
- Operation more than 200,000 times.
- Abnormal noise or visual defect found.
- Every six months interval upon contactors starting in service.
UHA Ratings - 3 Phase 40A~250A
| Cat. No. | UHA40 | UHA63 | UHA80 | UHA100 | UHA125 | UHA160 | UHA200 | UHA250 | |
|---|---|---|---|---|---|---|---|---|---|
| Main Circuit | Ratings | ||||||||
| Continuous Current | 40A | 63A | 80A | 100A | 125A | 160A | 200A | 250A | |
| Heating Current | 60A | 80A | 100A | 120A | 150A | 180A | 220A | 250A | |
| Operating Voltage | 450VAC | 220V / 450V / 780V / 1350VAC | |||||||
| Clamping Voltage | 820VDC | ||||||||
| Synchronous Making Delay | <50ms | ||||||||
| Synchronous Breaking Delay | <100ms | ||||||||
| Withstand Voltage to Control Circuit | >1,500VAC | ||||||||
| Control Voltage (Ue) | 110V 220VAC (75%~120%) | ||||||||
| Voltage to Maintain Closing | <50% Ue | ||||||||
| Power to Maintain Closing | 1.8W | 3W | |||||||
| Triggering Signal | Transistor Pulsing | ||||||||
| Life Expectancy | Electrical | >1,000,000 times of ON-OFF operation | |||||||
| Mechanical | >5,000,000 times of ON-OFF operation | ||||||||
| ON-OFF Operation Frequent | AC-3 | 1,000 time/hour | |||||||
| AC-4 | 600 time/hour | ||||||||
| Auxiliary Contacts | 2a 2b | ||||||||
| Environmental Temperature | -40°C ~ +45°C | ||||||||
| Net Weight | 2kg | 2.2kg | 5kg | 5.5kg | |||||
| Remarks | [1] UHA contactor provides arc-less breaking feature, but does not provide Zero-Inrush making feature. | ||||||||
| [2] Main circuit shall not be used for DC power. | |||||||||
UHA Ratings - Single Phase 80A~250A
| Cat. No. | UHA-801 | UHA-1251 | UHA-1601 | UHA-2501 | |
|---|---|---|---|---|---|
| Main Circuit | Ratings | ||||
| Continuous Current | 80A | 125A | 160A | 250A | |
| Heating Current | 120A | 160A | 180A | 270A | |
| Operating Voltage | 220V 450V 780V 1350VAC | ||||
| Withstand Voltage to Control Circuit | >1,500VAC | ||||
| Clamping Voltage | 820VDC | ||||
| Control Voltage (Ue) | 110V 220V 380VAC, 50/60Hz (75%~120%) | ||||
| Power to Maintain Closing | Voltage | <50% Ue | |||
| Watt | 1.8W | 2W | |||
| ON-OFF Operating Times | AC-3 | 1,000 time/hour | |||
| AC-4 | 600 time/hour | ||||
| Electrical Life Expectancy | AC-3 | > 800,000 times | |||
| AC-4 | > 1,600,000 times | ||||
| Mechanical Life Expectancy | > 5,000,000 times | ||||
| Environmental Temperature | -40°C ~ +45°C | ||||
| Remarks | [1] Available control voltage: 5V, 9V, 12V, 24V, 36V, 48V on request. | ||||
| [2] Main circuit shall not be used for DC power. | |||||