Built-in Bypass Online Soft Starter
The ZR900 series 15-37kW online soft starter is compatible with 15-37kW three-phase squirrel-cage asynchronous motors. It features a cabinet-type online bypass structure and uses thyristor voltage regulation to achieve smooth soft start and soft stop of the motor. Equipped with a bilingual (Chinese/English) LCD operating panel, it has complete motor protection functions,…
The ZR900 series 15-37kW online soft starter is compatible with 15-37kW three-phase squirrel-cage asynchronous motors. It features a cabinet-type online bypass structure and uses thyristor voltage regulation to achieve smooth soft start and soft stop of the motor. Equipped with a bilingual (Chinese/English) LCD operating panel, it has complete motor protection functions, supports two-wire/three-wire external control, and can be expanded with 4-20mA analog input and RS485 Modbus-RTU communication.
This power range is primarily designed for small to medium inertial loads such as fans, general water pumps, small crushers, and conveying equipment. It effectively suppresses motor starting inrush current, reduces impact on the power grid, and minimizes mechanical shock. Multiple starting modes are available, and overload protection levels 1-5 can be set. The entire unit is forced air-cooled, making it suitable for installation in small to medium-sized control cabinets. Standard operating conditions allow for direct matching of motor power; for heavy-duty, high-inertia loads, it is recommended to increase the power by one level. Installation and commissioning should only be performed by qualified technicians.
- Effectively reduce the starting current of the motor, can reduce the distribution capacity, avoid the grid capacity increase investment.
- Reduce the starting stress of the motor and the load equipment, and prolong the service life of the motor and related equipment.
- Soft shutdown function effectively solves the parking surge problem of the inertia system.
- A variety of unique starting modes, to adapt to the comp lex working conditions,to achieve a perfect starting effect.
- Perfect and reliable protection function, effectively ensure the safety of the motor and related production equipment.
- Standardized network protocol to meet the networking requirements of power automation.
- Use simulation software to optimize the heat dissipation design, miniaturization at the same time have better heat dissipation ability;
- Based on the 32-bit DSC processor plat form, higher bandwidth, faster speed, make the fuzzy algorithm control more accurate;
- Use of 12-bit AD sampler, DMA data transmission mode, to achieve direct AC sampling, high real-time performance;
- Realize a wide range of linear data sampling, data collection without dead area, more accurate data ;
- All faults can be turned on and closed for easy debugging;
- Soft up can be realized according to the load of automatic overtime and force force, load adantability is stronger;
- Rich monitoring data, monitoring current and voltage can monitor phase sequence Ang le, frequency, cumulative running time and other data;
- Online operation mode, no contact adhesion phenomenon ;
- High precision 4-20MA current output capacity, linear accuracy up to 0.5% ;
- Has up to 12 kinds of protection functions, among which the reverse time limit overload protection can effectively prevent the motor from overheating and burning, the use of equipment is more assured;
- Four lines of LCD display, can achieve both Chinese and English switch display.
| Item | performance index | |
| scope of application | 3 phase rat cage asynchronous motor | |
| power bracket | 5.5~450kw | |
| input voltage | 380V ± 15% | |
| supply frequency | 50/60HZ ± 5% | |
| overload capacity | 400%60sec、120% continuous | |
| Adjustable current multiple | From 1 to 5 times each time | |
| Soft up time | 1–90 Seconds | |
| Module working mode | over a long period of time | |
| cooling-down method | forced air cooling | |
| Secondary interface terminal | on-off input | 3 Road |
| relay output | 1 (programmable) or 3 (programmable) | |
| 4–20MA | Route (extension is optional) | |
| RS485 | 1-way (extended as optional) | |
| Protection | Short circuit speed break, overcurrent, overheat protection, reverse time overload, voltage phase deficiency, imbalance, Insient stop, undervoltage, overvoltage, underload, starting failure, phase sequence error. | |
| Host overload protection | Overload and reverse time limit, level 1 –5 is optional | |
| Host current imbalance protection | Unbalanced trip standard : 5– 100% any two-phase
unbalanced trip delay : 1–60 seconds can be set |
|
| Host short circuit protection | Quick break time : 0.1S, can be set | |
| Bus function | Interface : RS485 protocol : ModbusRTU | |
| Human-computer interface | 4 Line COG Screen | |
| Language | Chinese, English | |
| Specifications and models | Overall dimensions (mm) | Installation size (mm) | ||||
| W1 | H1 | D | W2 | H2 | D | |
| 18.5kW-37kW | 105 | 240 | 170 | 85 | 214 | M6 |
| 45kW-75kW | 150 | 280 | 179 | 117 | 240 | M6 |
| 90kW-115kW | 200 | 370 | 214 | 168 | 328 | M6 |
| 132kW-200kW | 228 | 400 | 250 | 194 | 345 | M8 |
| 250kW-400kW | 420 | 630 | 215 | 360 | 550 | M8 |
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