EKR3L series smart RCBO RS485 version product photo white background

EKR3L RS485 Smart RCBO | Leakage Protection

EKR3L RS485 is a smart RCBO that combines traditional overload, short-circuit and leakage protection with modern smart control. Through the RS485 platform, users can remotely open/close the breaker, set timing schedules and monitor real-time switch status. Automatic and manual operation modes are available, with optional automatic reclosing to improve power-supply reliability. Rated 1P+N, 10–63A, 230/240V, Icn 6kA/10kA, residual current types A/AC, trip curves B/C. Suitable for smart homes, commercial buildings, industrial facilities and public lighting control.

● Product type: Smart RCBO (Residual Current Circuit Breaker with Overcurrent protection)
● Series / variant: EKR3L RS485
● Communication method code: 5 = RS485; optional 53 = RS485 + Recloser
● Functions: Overload, short-circuit and leakage protection; remote open/close and timing control; real-time switch status monitoring; optional automatic reclosing
● Operation modes: Automatic mode (remote control via RS485); Manual mode (local operation only)
● No. of poles: 1P+N (with switched neutral)
● Rated currents (In): 10, 16, 25, 32, 40, 50, 63A
● Rated voltage (Ue): 230/240V
● Rated short-circuit capacity (Icn): 6kA / 10kA
● Rated sensitivity currents (IΔn): 10, 30, 100, 300mA
● Residual current type: A, AC
● Trip curve: B, C
● Installation: Mounting on 35mm DIN rail; incoming method from top
● Protection degree: IP20

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Product Profile

EKR3L smart RCBO offers not only overload, short-circuit, and leakage protection like traditional circuit breakers, but also the ability to be remotely controlled and monitored through the RS485 platform. It also provides an automatic reclosing function to improve the reliability of the circuit power supply.

EKR3L Smart RCBO combines traditional RCBO protection features with modern smart home technology, providing users with enhanced safety, convenience, and control over their electrical systems. It is particularly useful for remote management of electrical circuits and can be integrated into broader smart homes or building automation systems.

This product page is for the RS485 communication variant of EKR3L (type code communication method: 5; optional recloser code: 53).

Traditional Protection

Overload protection
Short-circuit protection
Leakage protection (residual current)

Advanced Functions

Remote opening and closing control
Timing tasks (power on/off scheduling)
Real-time switch status monitoring
Optional built-in automatic reclosing function

Communication

RS485, Baud rate: 2400 / 4800 / 9600 (default)

Automatic / Manual Mode

Automatic mode allows remote control via RS485
Manual mode only supports local manual operation

Mechanical Padlock

When the mechanical lock is pulled out, the switch enters a locked state, preventing the switch from being turned on. To restore the device, press down the mechanical lock.

Benefits

Reduces manual maintenance costs
Improves efficiency through remote control and monitoring
Enhances circuit power supply reliability with automatic reclosing
Integrates with smart home systems for improved automation

Structure labels: Power supply, Buckle, Indicator Light, Mode Switch, Mechanical Lock, Distribution Button, WiFi Antenna, RS485.

485 Dry contact terminals: 485A, 485B, Dry contact G, IN1, IN2.

Application

Smart home systems, which can be integrated into the overall home automation solution
Commercial buildings, which can achieve centralized energy management
Industrial facilities, which can remotely monitor and control individual circuits
Locations where electricity consumption requires regular control, such as billboard lighting and public area lighting

Model Preparation Meaning

EKR3L RS485 instruction of type code structure and meaning

Example type code structure for this product: EK R3 L - 5 - 1N C 63 H A 30

EK — Company code
R3 — Series code
L — With leakage protection
5 — Communication method (this product: 5 = RS485)
- 0: WiFi (Tuya)
- 1: Dry Contact
- 2: ZigBee (Tuya)
- 5: RS485
- 03: WiFi (Tuya) + Recloser
- 53: RS485 + Recloser
1N — No. of poles: 1P+N
C — Trip curve: B, C
63 — Rated currents (In): 10, 16, 25, 32, 40, 50, 63A
H — Rated short-circuit capacity (Icn): Blank = 6kA, H = 10kA
A — Residual current type: A, AC
30 — Rated sensitivity currents (IΔn): 10, 30, 100, 300mA

Technical Data

Residual current type	A, AC
No. of poles	1P+N (with switched neutral)
Supply terminal	L-N (It is advisable to draw power from the incoming line)
Power supply voltage	220/230V
Standby power consumption	< 3W
Status indicator	LED
Rated voltage (U_e)	230/240V
Rated frequency	50/60Hz
Rated currents (I_n)	10, 16, 25, 32, 40, 50, 63A
Rated sensitivity currents (I_Δn)	10, 30, 100, 300mA
Rated current off-time under (I_Δn)	≤ 0.1s
Rated residual making and breaking capacity (I_Δm)	500A (I_n ≤ 50A), 10I_n (I_n > 50A)
Rated short-circuit capacity (I_cn)	6kA, 10kA
Energy limiting class	3
Rated impulse withstand voltage (U_imp) (1.2/50μs)	4kV
Dielectric test voltage	2kV (50/60Hz, 1 min.)
Trip curve	B: (3-5) x I_n, C: (5-10) x I_n
Trip time	< 0.2s
Electrical life	4000 Cycles
Mechanical life	10000 Cycles
Communication method	RS485, Baud rate: 2400 / 4800 / 9600 (default)
Operational safety	Mechanical padlock, ensure safety during onsite maintenance
Monitoring physical data	Switch state, Device operating status
Function description	Overload protection, Short circuit protection, Leakage protection, Multiple timing, Remote control, Auto reclose
Auto reclose — Reclosing times	5 times (RS485)
Auto reclose — Reclosing time	First time: 60 seconds; Second time: 90 seconds; Third time: 1800 seconds; Fourth time: 2700 seconds; Fifth time: 3600 seconds
Auto reclose — Reset reclosing time	No tripping or manual reset within 60 seconds after successful closing; adjustable time setting range: 5–600 seconds
Protection degree	IP20
Ambient temperature	-20℃ to +55℃ (Current capacity is significantly reduced at 70℃)
Storage temperature	-25℃ to +70℃
Max. supply terminal size for cable	2.5mm²
Terminal connection type	Cable/Pin-type busbar/Fork-type busbar
Max. conductor cross-sections for cable	25mm²
Altitude	≤2000m
Installation	Mounting on 35mm DIN rail
Incoming method	From top