Three Phase AC380V 75KW Economical Smart Squirrel-Cage Asynchronous Electric Motor 50/60Hz Thyristor Soft Starter is a kind of new motor starter and protection devices which combines power electronics technology, microprocessor and automatic control. It can start / stop motor smoothly, which avoids issues of shocks between mechanical and electrical caused by direct starting, star / delta starting, auto decompression starting and other traditional start mode. It can also effectively reduce the starting current and distribution capacity, to avoid capacity investment. Meanwhile, current transformers are integrated in soft starter, users do not need to connect them externally.This product is three in line and six out line.
Conditions Of Usage
| Item | Description | |
| Power Supply | Input Voltage | Three-phase 220V/380V/480V/660V AC±15% |
| Frequency | 50/60Hz | |
| Adaptive Motor | Squirrel-cage three-phase asynchronous motor | |
| Starting Times | It is recommended not to exceed 20 times per hour | |
| Control Mode | (1) Operation panel control | |
| (2) Operation panel + external control | ||
| (3) External control | ||
| (4) External control + COM control | ||
| (5) COM control | ||
| Start Mode | (1) Current-limiting start | |
| (2) Voltage ramp start | ||
| (3) Kick start+ current-limiting start | ||
| (4) Kick start + voltage ramp start | ||
| (5) Current ramp start | ||
| (6) Voltage current-limiting double closed-loop start | ||
| Stop Mode | (1) Soft stop | |
| (2) Free stop | ||
| Protective Function | (1)Open loop protection for external instantaneous stop terminals | |
| (2) Over-heat protection for soft starter | ||
| (3) Protection for too long starting time | ||
| (4) Input lose phase protection | ||
| (5) Output lose phase protection | ||
| (6) Unbalanced three-phase protection | ||
| (7) Running over current protection | ||
| (8) Running overload protection | ||
| (9) Protection for fault parameter setting | ||
| (10) Incorrect wiring protection of external control stop terminals | ||
Environment Ambient | Ambient | Indoor with good ventilation and free from corrosive gas and conductive dust |
| Altitude | Below 1000m. Need to rise the rated power when the altitude is more than 1000m | |
| Temperature | -30~+55°C | |
| Humidity | 90%RH without dew condensation | |
| Vibration | <0.5G | |
| Protection Class | IP 20 | |
| Cooling | Natural cooling | |
Termianl Description
| Terminal No. | Name of terminal | Description | |
Main circuit | R,S,T | Power Supply terminal | Connect to Power supply |
| L11,L12,L13 | Bypass terminal | Connect to Bypass contactor | |
| U,V,W | Motor terminal | Connect to motor | |
Control circuit | 1 | Bypass output | Bypass output |
| 2 | |||
| 3 | Time-delay output | Time-delay output | |
| 4 | |||
| 5 | Failure output | Failure output | |
| 6 | |||
| 7 | Instantaneous stop | Instantaneous stop | |
| 8 | Stop | Stop disconnect to Public, then stop | |
| 9 | Start-up | Start-up connect to Public, then start | |
| 10 | Public | Public | |
| 11 | Analog output - | 4-20mA | |
| 12 | Analog output + | ||
Connection Diagram
Dimension
Maintenance
1. Dust: If too much dust, it will reduce the insulation level of the soft starter, even causes the soft starter does not work.
Brush the dust with clean and dry brush.
Remove dust with compressed air machine.
2. Condensation: If condensation, it will reduce the insulation level of soft starter, even causes the soft starter does not work.
(1) Blow it with a hair dryer or electric stove.
(2) Bring it to power distribution room for dehumidification.
3. Regularly check components' intact. Whether it can work properly.
4. Check soft starter' cooling channel, ensure they are not clogged by dirt and dust.
Before maintenance checking, it has to cut off all power in the line side of soft starter.
