30kw~37kw Built-In Bypass Soft Starter
NR1000 series 30kW~37kW standard built-in bypass soft starter is upgraded mid-power motor control solution based on 32-bit DSC fuzzy control chip, designed for medium load 3-phase squirrel cage asynchronous motors at 380V industrial sites. Compared with 5.5-22kW mini models, this segment adds expandable 4-20mA analog output board and dual programmable relay contacts,…
NR1000 series 30kW~37kW standard built-in bypass soft starter is upgraded mid-power motor control solution based on 32-bit DSC fuzzy control chip, designed for medium load 3-phase squirrel cage asynchronous motors at 380V industrial sites. Compared with 5.5-22kW mini models, this segment adds expandable 4-20mA analog output board and dual programmable relay contacts, retaining integrated bypass contactor design to lower heat generation during continuous full-voltage operation. It limits motor starting current to 1-5x rated value to avoid grid overload, delivers soft stop function to eliminate water hammer and inertial surge of pump/blower equipment, widely used in water treatment, ventilation and medium crushing industries.
- Expandable 4-20mA Analog Output Interface: Optional expansion board provides 4~20mA DC current signal (0A=4mA, max rated current=20mA), 0.5% linear precision, connect to PLC or DC ammeter for real-time motor current monitoring
- Dual Programmable Relay Outputs (2 Channels): Customizable relay logic via parameter menu (bypass signal, fault alarm, running interlock, feed current monitoring), AC250V 5A contact capacity for external alarm & interlock circuit
- High Precision Real-Time Sampling: 12-bit AD sampler + DMA direct AC sampling, no dead zone data collection, accurate phase sequence angle, frequency, cumulative runtime monitoring
- Adjustable Inverse Time Overload Curves (1~6 Grades): Longer protection delay for higher curve grade, effectively prevent medium-power motor overheating burnout under long-term partial overload
- Self-Adaptive Load Startup Logic: Auto extend startup time & boost torque based on actual load during soft start, stronger adaptability for medium inertia blowers and pumps
- Same Full Protection System as Full Series: Short circuit quick break (adjustable ≤0.1s), phase imbalance protection (5~100% imbalance threshold), start failure protection, phase sequence error protection to avoid reverse rotation damage of compressors
- Bilingual LCD Operation Panel: Chinese/English one-click switch, fault screen capture function locks all running data at fault moment for fast failure diagnosis
- Convenient Expansion Terminal Layout: Independent 10-pin expansion interface on control board for quick installation of 4-20mA & RS485 modules without rewiring main circuit
| Project Name | Performance Metrics | |
| Scope of application | 3-phase squirrel cage asynchronous motor | |
| Power range | 3kW~22kW (380V mini type), 30kW~400kW (380V conventional type) | |
| Rated voltage | 380V(±20%) | |
| Rated frequency | 50/60Hz ±5% | |
| Overload capacity | ≤22kW: 300% 30 seconds, 120% continuous; >22kW: 400% 60 seconds, 120% continuous | |
| Control power supply voltage | The 380V model does not require an external control power supply | |
| Adjustable current multiplier | 1–5 times | |
| Soft start time | 1 to 90 seconds | |
| Module operation mode | Long-term | |
| Cooling method | Forced air cooling or natural cooling (some models) | |
| Secondary interface terminal | Discrete input | 3 routes |
| Relay output | ≤115kW: 1-channel (programmable); >115kW: 3-channel (programmable) | |
| 4-20mA | ≤22kW: None; >22kW: 1 channel (optional) | |
| RS485 | ≤22kW: 1 channel; >22kW: 1 channel (optional expansion) | |
| Protection | Short circuit quick break, overcurrent, overheating protection, inverse time overload, voltage phase loss, phase unbalance, instant stop, undervoltage, overvoltage, underload, startup failure, phase sequence error | |
| Host overload protection | Overload inverse time limit, optional levels 1–6 | |
| Host current imbalance protection | Unbalanced tripping standard: 5-100% for any two phases | |
| Unbalanced trip delay: 1-60 seconds adjustable | ||
| Host short-circuit protection | Quick break time: ≤ 0.1S, adjustable | |
| Bus function | Interface: RS485; Protocol: Modbus RTU | |
| Human-machine interface | 4-line COG screen | |
| Language | Chinese, English | |
Technical parameters
| Rated Voltage | Rated Power | Rated Current |
| 380V | 3kW | 6A |
| 380V | 5.5kW | 11A |
| 380V | 7.5kW | 15A |
| 380V | 11kW | 22A |
| 380V | 15kW | 30A |
| 380V | 18.5kW | 37A |
| 380V | 22kW | 44A |
| 380V | 30kW | 60A |
| 380V | 37kW | 74A |
| 380V | 45kW | 90A |
| 380V | 55kW | 110A |
| 380V | 75kW | 150A |
| 380V | 90kW | 180A |
| 380V | 115kW | 230A |
| 380V | 132kW | 264A |
| 380V | 160kW | 320A |
| 380V | 185kW | 370A |
| 380V | 200kW | 400A |
| 380V | 250kW | 500A |
| 380V | 280kW | 560A |
| 380V | 320kW | 640A |
| 380V | 350kW | 700A |
| 380V | 400kW | 800A |
| specifications and models | External dimensions (mm) | Installation size (mm) | ||||
| W1 | H1 | D | W2 | H2 | Φ | |
| 5.5KW-22KW | 60 | 165 | 145 | 55 | 155 | m4 |
| 30KW-37KW | 110 | 250 | 162 | 85 | 220 | m5 |
| 45KW-75KW | 140 | 270.5 | 139.5 | 110 | 245 | m6 |
| 90KW-115KW | 210 | 340 | 185 | 210 | 315 | m8 |
| 132KW-200KW | 280 | 610 | 200 | 232 | 540 | m8 |
| 250KW-400KW | 332 | 725 | 246 | 282 | 640 | m10 |
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