ARD2F Series Smart Motor Protection Relay
Overview
ARD2F intelligent motor protector (hereinafter referred to as protector) is suitable for low-voltage motor circuits with rated voltages up to 660V, integrating protection, measurement, control, communication, and operation and maintenance. Its complete protection functions ensure the safe operation of the motor, and it has logic programmable functions that can meet a variety of control methods. Different communication modules are optional to meet on-site communication needs.
■Support fundamental wave and full wave power parameter measurement (U, I, P, Q, S, PF, F, EP, EQ), current and current unevenness
Scale, current positive sequence, negative sequence, zero sequence component, voltage, three-phase voltage phase angle, residual current.
■ Protection functions include overload inverse time limit, overload definite time limit, grounding, starting timeout, leakage, underload, phase failure, blocked rotor,
Blockage, short circuit, overflow, unbalance (current, voltage), overpower, underpower, overvoltage, undervoltage, phase sequence, temperature, tE
Time, external fault, number of starts limit, running time alarm, number of fault alarms.
Main Parameters
■ 9 programmable DI inputs, built-in DC24V power supply by default, external active wet contacts can also be selected.
■ 5 channels of programmable DO output, meeting direct starting, star-delta starting, autotransformer starting, and other starting methods. The master station can realize remote control "start/stop" of the motor through the communication bus.
■ Optional anti-shock function: Supports immediate restart after power shock and restart after voltage loss.
■ Optional MODBUS_RTU communication and PROFIBUS DP communication, supporting up to 2 communication interfaces.
■ Optional 1-channel DC4-20mA analog output interface can be connected to the DCS system to monitor on-site equipment.
■ It has various event records such as fault record, starting record, parking record, DI displacement record and restart record.
■ LCD display interface, supports Chinese/English switching.
Wiring Diagram
Typical Connection
Live Application Pictures
Application
ARD2F is a smart motor protection relay for low-voltage motors from 0.12 kW upward. It protects against overload, phase loss, blocked rotor and underload, and adds leakage, temperature and switching inputs as optional functions.
Motor current
0.1 A to 5000 A via CT
Working voltage
AC 220 V / 380 V / 660 V
Auxiliary supply
AC 85-265 V / DC 100-350 V
Standard protections
Overload, phase loss, blocked rotor
Technical data
| Parameter | Value (from the product manual) |
|---|---|
| Auxiliary power | AC 85-265 V / DC 100-350 V |
| Rated working voltage of the motor | AC 220 V / 380 V / 660 V, 50 / 60 Hz |
| Rated operating current | 1 A or 5 A input (0.1-5000 A) with external CT; or 1.6 A, 6.3 A, 25 A, 100 A, 250 A, 800 A direct ranges |
| Current specification ranges | 1.6 A (0.4-1.6 A), 6.3 A (1.6-6.3 A), 25 A (6.3-25 A), 100 A (25-100 A), 250 A (63-250 A), 800 A (250-800 A) |
| Applicable motor range | 0.12 kW to 250 kW depending on the current specification |
| Relay output contact capacity | AC 250 V / 10 A at impedance load |
| Switching input | 9 channels of passive dry contact; active DC 110 V, DC 220 V or AC 220 V input optional |
| Communication | RS485 Modbus-RTU; Profibus-DP option |
| Standard protection functions | Fixed-time and inverse-time overload, starting timeout, phase loss, voltage unbalance, current unbalance, locked-rotor, short circuit, underload, external fault, block |
| Temperature protection | PTC / NTC motor winding input (option T) |
| Leakage protection | Available as option F |
| Analog output | 4-20 mA (option K) |
| Event recording | SOE event record (option S) |
| Voltage function | Phase sequence, power and power factor (option U) |
| Energy metering | Available as option Ep |
Additional function codes
| Code | Function |
|---|---|
| Q | Starting control (including K function) |
| K | Switching input |
| T | Temperature protection |
| J | Alarm, programmable output |
| C | 1 channel communication, Modbus-RTU |
| CP | 1 channel communication, Profibus-DP |
| 2C | 2 channels communication, Modbus-RTU |
| CCP | 2 channels communication, Modbus + Profibus |
| L | Leakage protection |
| M | 4-20 mA analog output |
| SU | Anti-electric shock function |
| SR | SOE event record |
| U | Voltage function: phase sequence, power, power factor |
| tE | tE time protection |
| Ep | Energy metering |
Built-in functions
- Inverse-time and fixed-time overload curves matched to the motor starting duty
- Blocked-rotor and short-circuit protection with fast trip
- Underload and external-fault protection for pumps and conveyors
- Nine digital inputs let existing control wiring report status through the same device
- Modbus-RTU register map available for SCADA and BMS integration
Before you request a quote
- Motor rated current and rated power
- Supply voltage: AC 220 / 380 / 660 V
- Required options: leakage, temperature, analog output, communication
Motor protection ordering depends on the current range and the function codes together. Send the motor rated current, rated power, supply voltage and the functions you need, and we confirm the ARD2F code and the CT ratio within one working day.
