RS485 Smart Moulded-Case Circuit Breaker (MCCB)
Applications
The smart moulded-case circuit breaker (MCCB) protects main-distribution circuits and critical loads. The IOTB2LM RS485 connects over RS485, with frame sizes covering 125 A, 250 A, 400 A, 630 A and 800 A.
Selection overview
- Item
- Product series
- Specification
- IOTB2LM RS485 smart moulded-case circuit breaker series
- Item
- Communication
- Specification
- RS485
- Item
- Applicable system
- Specification
- Three-phase four-wire supply / consumer systems with a directly earthed neutral
- Item
- Rated operational voltage
- Specification
- Ue AC380/400/415V 50Hz
- Item
- Poles
- Specification
- 3P+N / 4P
- Item
- Model designation
- Specification
- 125 / 250 / 400 / 630 / 800 = frame current ratings; S / M / H = normal / standard / high breaking capacity; 3N = 3P+N (N pole non-switching); 4 = 4P (N pole switching)
- Item
- Breaking-capacity class
- Specification
- S / M / H
- Item
- Applicable standards
- Specification
- GB/T14048.2; GB/T14048.4; GB/T32902
| Item | Specification |
|---|---|
| Product series | IOTB2LM RS485 smart moulded-case circuit breaker series |
| Communication | RS485 |
| Applicable system | Three-phase four-wire supply / consumer systems with a directly earthed neutral |
| Rated operational voltage | Ue AC380/400/415V 50Hz |
| Poles | 3P+N / 4P |
| Model designation | 125 / 250 / 400 / 630 / 800 = frame current ratings; S / M / H = normal / standard / high breaking capacity; 3N = 3P+N (N pole non-switching); 4 = 4P (N pole switching) |
| Breaking-capacity class | S / M / H |
| Applicable standards | GB/T14048.2; GB/T14048.4; GB/T32902 |
Frame size
- Category
- 125 frame
- Model/Specification
- IOTB2LM RS485-125
- Current / modules
- 50-125A
- Category
- 250 frame
- Model/Specification
- IOTB2LM RS485-250
- Current / modules
- 100-250A
- Category
- 400 frame
- Model/Specification
- IOTB2LM RS485-400
- Current / modules
- 160-400A
- Category
- 630 frame
- Model/Specification
- IOTB2LM RS485-630
- Current / modules
- 250-630A
- Category
- 800 frame
- Model/Specification
- IOTB2LM RS485-800
- Current / modules
- 320-800A
| Category | Model/Specification | Current / modules |
|---|---|---|
| 125 frame | IOTB2LM RS485-125 | 50-125A |
| 250 frame | IOTB2LM RS485-250 | 100-250A |
| 400 frame | IOTB2LM RS485-400 | 160-400A |
| 630 frame | IOTB2LM RS485-630 | 250-630A |
| 800 frame | IOTB2LM RS485-800 | 320-800A |
Main technical parameters
- Item
- Rated insulation voltage Ui
- Specification
- AC1000V
- Item
- Rated impulse withstand voltage Uimp
- Specification
- 12000V / 12kV
- Item
- Overload long-time delay setting
- Specification
- (0.4-1)In
- Item
- Short-circuit short-time delay protection
- Specification
- Ir2: 2Ir1-10Ir1; ts: 0.1-1.0 s / OFF; factory setting: 6Ir1 / 0.4 s
- Item
- Short-circuit instantaneous protection
- Specification
- Ir3: 4Ir1-12Ir1; factory setting: 10Ir1
- Item
- Residual operating current
- Specification
- 30mA (non-time-delay only) / 50 / 75 / 100 / 200 / 300 / 500 / 800 / 1000mA adjustable
- Item
- Maximum non-tripping time
- Specification
- 0.06 / 0.1 / 0.2s selectable
- Item
- Rated ultimate short-circuit breaking capacity Icu
- Specification
- 125/250 frames: S50 / M65 / H100; 400/630/800 frames: S50 / M70 / H100
- Item
- Rated service short-circuit breaking capacity Ics
- Specification
- S35/M50/H70
- Item
- Short-time withstand current Icw
- Specification
- 10kA / 1s
- Item
- Utilization category
- Specification
- Category B
- Item
- Residual short-circuit making and breaking capacity I△m
- Specification
- 25% Icu
- Item
- Reclosing interval
- Specification
- 20-60s
- Item
- Installation conditions
- Specification
- Altitude ≤2000m; maximum mounting inclination ±5°; installation category III for the main circuit, II for auxiliary / control circuits
- Item
- Operating environment
- Specification
- -10 °C to +45 °C; temperature variation within 24h not exceeding 35K; relative air humidity not exceeding 50% at +40 °C; no media presenting an explosion hazard; pollution degree 3
| Item | Specification |
|---|---|
| Rated insulation voltage Ui | AC1000V |
| Rated impulse withstand voltage Uimp | 12000V / 12kV |
| Overload long-time delay setting | (0.4-1)In |
| Short-circuit short-time delay protection | Ir2: 2Ir1-10Ir1; ts: 0.1-1.0 s / OFF; factory setting: 6Ir1 / 0.4 s |
| Short-circuit instantaneous protection | Ir3: 4Ir1-12Ir1; factory setting: 10Ir1 |
| Residual operating current | 30mA (non-time-delay only) / 50 / 75 / 100 / 200 / 300 / 500 / 800 / 1000mA adjustable |
| Maximum non-tripping time | 0.06 / 0.1 / 0.2s selectable |
| Rated ultimate short-circuit breaking capacity Icu | 125/250 frames: S50 / M65 / H100; 400/630/800 frames: S50 / M70 / H100 |
| Rated service short-circuit breaking capacity Ics | S35/M50/H70 |
| Short-time withstand current Icw | 10kA / 1s |
| Utilization category | Category B |
| Residual short-circuit making and breaking capacity I△m | 25% Icu |
| Reclosing interval | 20-60s |
| Installation conditions | Altitude ≤2000m; maximum mounting inclination ±5°; installation category III for the main circuit, II for auxiliary / control circuits |
| Operating environment | -10 °C to +45 °C; temperature variation within 24h not exceeding 35K; relative air humidity not exceeding 50% at +40 °C; no media presenting an explosion hazard; pollution degree 3 |
Monitoring, recording and maintenance
- Item
- Operation monitoring
- Specification
- Displays operating status, rated current, residual current setting, phase voltage / phase current, leakage current, active / reactive power, energy, power factor, frequency, temperature (optional) and harmonics
- Item
- Metering accuracy
- Specification
- Current and voltage accuracy is class 0.5S; active and reactive power are class 1.
- Item
- Records and traceability
- Specification
- Supports querying the tripped phase, trip cause, trip time and historical records, with trip-count statistics.
- Item
- Parameter maintenance
- Specification
- Protocol, address, baud rate, date and time, contrast, total energy reset and protection parameters can be set
- Item
- External interface
- Specification
- Supports active / reactive energy pulse output, RS485, external opening / closing control, an auxiliary interface and an external 485 power supply terminal
| Item | Specification |
|---|---|
| Operation monitoring | Displays operating status, rated current, residual current setting, phase voltage / phase current, leakage current, active / reactive power, energy, power factor, frequency, temperature (optional) and harmonics |
| Metering accuracy | Current and voltage accuracy is class 0.5S; active and reactive power are class 1. |
| Records and traceability | Supports querying the tripped phase, trip cause, trip time and historical records, with trip-count statistics. |
| Parameter maintenance | Protocol, address, baud rate, date and time, contrast, total energy reset and protection parameters can be set |
| External interface | Supports active / reactive energy pulse output, RS485, external opening / closing control, an auxiliary interface and an external 485 power supply terminal |
Display, settings and connection
- Item
- Display and settings
- Specification
- The local display shows rated current, residual current setting, operating status and time, voltage / current, leakage current, power, energy, power factor, frequency and temperature (optional)
- Item
- Electronic protection
- Specification
- Overload long-time delay, short-circuit short-time delay / instantaneous, residual current, reclosing, over- and under-voltage, phase loss, neutral loss and overtemperature (optional) can all be configured
- Item
- Panel buttons
- Specification
- Open, close, menu, confirm, back, up/down, test and alarm buttons are used for local operation
- Item
- Local operation
- Specification
- The handle, buttons and display area are used for on-site opening and closing, reset, parameter viewing and commissioning
- Item
- Installation and wiring
- Specification
- The circuit breaker should be mounted vertically; the upper terminals are the main-circuit incoming side, the lower terminals are the outgoing side, and the neutral must be connected to the N terminal
- Item
- Communication interface
- Specification
- The 4G / WiFi / RS485 versions can connect to the platform or an on-site system according to network conditions
- Item
- Certification and delivery
- Specification
- The 125 / 250 and 400 / 630 / 800 frame sizes each carry the corresponding 3C / CQC certificates.
| Item | Specification |
|---|---|
| Display and settings | The local display shows rated current, residual current setting, operating status and time, voltage / current, leakage current, power, energy, power factor, frequency and temperature (optional) |
| Electronic protection | Overload long-time delay, short-circuit short-time delay / instantaneous, residual current, reclosing, over- and under-voltage, phase loss, neutral loss and overtemperature (optional) can all be configured |
| Panel buttons | Open, close, menu, confirm, back, up/down, test and alarm buttons are used for local operation |
| Local operation | The handle, buttons and display area are used for on-site opening and closing, reset, parameter viewing and commissioning |
| Installation and wiring | The circuit breaker should be mounted vertically; the upper terminals are the main-circuit incoming side, the lower terminals are the outgoing side, and the neutral must be connected to the N terminal |
| Communication interface | The 4G / WiFi / RS485 versions can connect to the platform or an on-site system according to network conditions |
| Certification and delivery | The 125 / 250 and 400 / 630 / 800 frame sizes each carry the corresponding 3C / CQC certificates. |
