ARD series intelligent motor protector (hereinafter referred to as protector) can perform various conditions such as start timeout, overload, phase failure, unbalance, underload, ground/leakage, blockage, short circuit and external fault during motor operation. Protection, and SOE fault event recording function, convenient for on-site maintenance personnel to find the cause of the fault. Suitable for coal, petrochemical, smelting, electric power, ships, and civil construction. The protector has RS485 remote communication interface, DC 4 ~ 20mA analog output, and PLC, PC and other control machines form a network system. Remote monitoring of motor operation.
2、Model Description
l ARD3 Intelligent motor protector
Table 9Starting method
Starting method | Code |
Manual mode1) | A |
Two-step mode2) | H |
Two-speed start | F |
Protection method | J |
Note:
1) Manual mode: The protector participates in the control. When the start mode is direct start (full pressure start) and the two-way start, the protector is set to manual mode.
2) Two-step mode: When the protector participates in the control, when the start mode is star/delta start (two relays) and autotransformer (two relays), the protector is set to two-step mode.
Table 10 Additional features
Additional features (optional) | 代号 |
Communication function, the protocol is MODBUS_RTU | C |
2-way communication function, the protocol is MODBUS_RTU | 2C |
Residual current protection (leakage) | L |
Voltage function (power, power factor) | U |
Temperature protection | T |
4~20mA analog output | M |
tE time protection | tE |
Electrical energy (including voltage function) | EP |
Loss of pressure (anti-shake) | SU(Including voltage and fault recording functions) |
broken record | SR |
Note: 1. When the additional function is equipped with leakage protection L, it is necessary to purchase zero-sequence transformers with different apertures according to the actual current.
2. For customers without display requirements, a 90L display unit must be ordered in a batch of orders for debugging purposes;
3. When the additional function is equipped with leakage protection L, it is necessary to purchase zero-sequence transformers with different apertures according to the actual current.
4. additional features optional 2C and T two.
3、Technical indicators
l ARD2(L)、ARD2F、ARD3 Main Specifications
Technical Parameters | Technical indicators | |||
ARD2(L) | ARD2F | ARD3 | ||
Auxiliary power | Voltage | AC85V~265V/DC100V~350V | ||
Power consumption | ≤7VA | ≤15VA | ||
Rated operating voltage | AC380V/AC660V,50Hz/60Hz | |||
Rated operating current | 1A(0.1~999.9) | |||
5A(0.1~999.9) | ||||
1.6A(0.4A~1.6A) | ||||
6.3A(1.6A~6.3A) | ||||
25A(6.3A~25A) | ||||
100A(25A~100A) | ||||
250A(63A~250A) | ||||
800A(250A~800A) | ||||
Relay output contact capacity | AC250V, 3A;DC30V, 3A | AC250V, 6A | ||
Switch input | 2 | 9 | ||
Surroundings | Operating temperature:-10ºC~55ºC | |||
Storage temperature:-20ºC~65ºC | ||||
Relative humidity:5﹪~95﹪不结露 | ||||
Altitude:≤ 2000m | ||||
Pollution level | 3 | |||
Protection level | IP20 | Main body IP20, display unit IP54(when installed in the cabinet panel) | ||
Installation category | Level III |
l ARD3T Main Specifications
Technical Parameters | Technical indicators | ||
Auxiliary power | AC/DC 110 / 220V,power consumption≤15VA | ||
Rated operating voltage of the motor | AC 380V / 660V,50Hz / 60Hz | ||
Motor rated operating current | 1.6(0.40A-2.00A) | Measuring with the measurement module | |
6.3(1.6A-6.3A) | |||
25(6.3A-25A) | |||
100(25A-100A) | |||
250(63A-250A) | Use external current transformer + measurement module | ||
800(250A-800A) | |||
Leakage | 50mA-1A | Using measurement module + leakage current transformer | |
3A-30A | |||
Relay output contact capacity | Resistive load | AC250V、6A;DC24V、6A | |
Inductive load | AC250V、2A;DC24V、2A | ||
Main body switch input and output | 4DI、4DO,DI can be a dry contact or a wet contact | ||
Switch module | 4DI、3DO,DI can be a dry contact or a wet contact | ||
Temperature module | External sensor type:PT100、PT1000、Cu50、PTC、NTCNumber of sensor channels: 3 channelsSensor corresponding measurement range:PT100/PT1000:-50°C~+500°CCu50:-50°C~+150°CPTC/NTC:100Ω~30kΩ | ||
Analog module | Can be realized: 2 channels 4 ~ 20mA input measurement, 2 channels 4 ~ 20mA transmission output4~20mA input measurement accuracy ±0.5%4~20mA output maximum load capacity is ≤500Ω | ||
Subject communication | RS485:Modbus-RTU | ||
Communication module | RS485:Double Modbus-RTU、Profibus | ||
Surroundings | Operating temperature | -10ºC~55ºC | |
Storage temperature | -25ºC~65ºC | ||
Relative humidity | ≤95﹪ No condensation, no corrosive gases | ||
altitude | ≤2000m | ||
Pollution level | Level 3 | ||
Protection level | Main body IP20, split display module IP44 (installed on the cabinet) | ||
Installation category | Level III |
4、Product Features
Low voltage motor protection quick selection table
Description: “√” means standard“■” means optional
ModelFunction | ARD2 | ARD2L | ARD2F | ARD3 | ARD3T | ||
Application | Low voltage 0.4kv-1.14kv motor protection | ||||||
Protective function | Start timeout | √ | √ | √ | √ | √ | |
overload | √ | √ | √ | √ | √ | ||
Underload | √ | √ | √ | √ | √ | ||
Short circuit | √ | √ | √ | √ | √ | ||
Blocking | √ | √ | √ | √ | √ | ||
Stall | √ | √ | √ | √ | √ | ||
unbalanced | √ | √ | √ | √ | √ | ||
Feedback timeout | √ | ||||||
External fault | ■ | ■ | ■ | √ | √ | ||
Module structure failure | √ | ||||||
Internal fault | √ | ||||||
Overpressure | ■ | ■ | ■ | ||||
Undervoltage | ■ | ■ | ■ | ||||
Phase failure | √ | √ | √ | √ | √ | ||
Phase sequence | ■ | ■ | ■ | ||||
Over power | ■ | ■ | |||||
Underpower | ■ | ■ | ■ | ||||
tE time | ■ | ■ | ■ | ||||
Body temperature protection | ■ | ■ | √ | ||||
Main body temperature sensor failure | √ | ||||||
Module temperature protection | ■ | ||||||
Module temperature sensor failure | ■ | ||||||
Call the police | ■ | ■ | ■ | √ | √ | ||
Loss of pressure (anti-shake) | ■ | ■ | ■ | ||||
4-20mA input protection | ■ | ||||||
Residual current(choose one) | Ground | √ | √ | √ | √ | √ | |
Leakage | ■ | ■ | ■ | ■ | ■ | ||
Communication function | Modbus_RTU | ■ | ■ | ■ | ■ | √ | |
Double Modbus_RTU | ■ | ■ | |||||
Switch input | 2 | ■ | ■ | ||||
6 | |||||||
8 | 4-way standard4-way optional | ||||||
9 | ■ | √ | |||||
Relay output | 4 | 4-way standard4-way optional | |||||
5 | 4-way standard4-way optional | √ | |||||
6 | |||||||
7 | 4-way standard4-way optional | ||||||
Start control | ■ | √ | √ | ||||
4-20mA analog output | ■ | ■ | ■ | ■ | ■ | ||
Record | 8 records | ■ | ■ | √ | |||
20 records | ■ | ■ | |||||
Operational information record | √ | √ | √ | ||||
Logic function | Timer | √ | |||||
counter | √ | ||||||
Truth table | √ | ||||||
Parameter measurement | Three-phase current | √ | √ | √ | √ | √ | |
Leakage current | ■ | ■ | ■ | ||||
Three-phase voltage | ■ | ■ | ■ | ||||
Power, power factor | ■ | ■ | ■ | ||||
Frequency | √ | √ | √ | √ | √ | ||
Electric energy | ■ | ■ | |||||
PTC/NTC | ■ | ■ | √ | ||||
4-20mA input | ■ | ||||||
Temperature measurement module | ■ | ||||||
Liquid level | |||||||
Interface display | LED digital tube display | √ | |||||
LCD liquid crystal display | √ | ■ | ■ | ■ |