ARD3T Motorschutzschalter

ARD3T motor protection switch

The ARD3T motor protection switch (hereinafter referred to as the "protection switch") is suitable for low-voltage motor circuits with a rated voltage of up to 380 V and integrates protection, measurement, control, communication, operation, and maintenance. Its perfect protection function ensures safe motor operation and enables a variety of control methods thanks to its logically programmable function. Its perfect protection function ensures safe motor operation and enables a variety of control methods thanks to its logically programmable function.

U, I, P, S, OF, F, EP, leakage, PTC/NTC/PTC 100/PT100/CU50
8 programmable DI; 7 programmable DO
Start control function
Modbus RTU or Profibus DP communication
1 DC4-20mA analog output
Anti-shaking function
SOE
Nominal U and I: 660 V, 800 A

PRODUCT INFO
TECHNICAL DATA
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Product info

1Protective function
2Control function
Various control methods, programmable inputs and outputs
3Measurement, monitoring
Three-phase voltage, current, active power, electrical energy, leakage current, power factor, PTC/NTC
4SOE
5communication
RS485 Modbus RTU or Profibus-DP

Technical data

Technical parameters	index
Protector auxiliary power supply	AC/DC 110/220 V or AC380 V, power consumption 15 VA
Rated operating voltage of the motor	AC 380V / 660V, 50Hz / 60Hz
Rated operating current of the motor	1 (0.1A-5000A)	Adopt measurement module
	5 (0.1A-5000A)
	25 (6.3A-25A)
	100 (25A-100A)
	250 (63A-250A)	Covering the costs for current transformers and measuring modules
	800 (250A-800A)
leakage current	50mA – 1A or 3A – 30A	Use measuring module and leakage current transformer
Contact capacity of the relay output	Impedance load	AC250V; 6A; DC24V; 6A
Master switching input and output	4DI/4DO
Switching value module	4DI/3DO
Temperature module	External sensor type: PT100, PT1000, Cu50, PTC, NTC
	Sensor channel: 3 channels
	Corresponding measuring range of the sensor: PT100/PT1000: -50 °C to +500 °C Cu50: -50 °C to +150 °C PTC/NTC: 100 Ω to 30 kΩ
Analog module	2-channel 4-20mA input and 2-channel 4-20mA output
Main communication	RS485 Modbus RTU
Communication module	double RS485 Modbus RTU, Profibus DP
Environment	working temperature	-10ºC～55ºC
	Storage temperature	-25ºC～70ºC
	Relative humidity	≤95﹪No condensation, no corrosive gas
	Height	≤2000m
degree of contamination	Class 3
Degree of protection	Main body IP20, split display module IP54 (installed on the cabinet panel)
Plant category	Stage III