Technical Specifications Phase‑CT secondary input:1 A. Control‑power supply:70‑265 VAC /90‑300 VDC. 4‑channels 4‑20 mA isolated analog outputs. 9 opto‑isolated digital inputs. 4 Form‑C relay outputs. 6‑channel RTD temperature‑sensor inputs. Communication interface: RS485 Modbus RTU. Back‑lit wide‑temperature‑grade LCD display. Extended operating temperature:‑40 °C to +85 °C Storage Temperature:‑50 °C to +90 °C Relative Humidity:5%‑95%, non‑condensing Mechanical Dimension: Draw‑out drawer‑type panel‑mount unit
Functional Features Inherits complete SR469‑series motor‑protection functions: overload, locked‑rotor, jam, phase‑unbalance, ground‑fault, RTD‑detected over‑temperature protection. Real‑time electrical‑parameter metering, fault‑recording and oscillography storage. User‑programmable internal logic control functions. Hardware components selected for high‑temperature and low‑temperature fluctuating‑environment operation. Local keypad‑LCD parameter configuration. Modbus RTU communication access for SCADA‑system data acquisition.
Application Scenarios Outdoor‑installed motor‑control‑center cabinet equipment. High‑temperature‑workshop motor‑protection application points. Cold‑region industrial‑plant on‑site motor‑control‑systems. Metallurgy‑and‑mining‑site exposed motor‑protection equipment.
Performance Parameters Current‑measurement accuracy: ±1%. Voltage‑measurement accuracy: ±0.5%. Analog‑output accuracy: ±0.5% full scale. Relay contact resistive rating:250 VAC /5 A.
Structural Characteristics Draw‑out plug‑in drawer‑type mechanical structure. Front‑panel LCD‑keypad human‑machine‑interface assembly. Rear‑side multi‑pin draw‑out interconnection connector. Drawer‑removal handle for maintenance without field‑wiring disconnection. Built‑in mechanical‑locking anti‑loosening mechanism.
Working Principle Motor‑current‑voltage signals and RTD temperature signals are sampled continuously. Internal micro‑processor runs motor‑protection‑algorithm judgment logic. Under fault‑conditions, trip‑alarm‑control‑relay signals are output. Fault‑waveform‑and‑event‑data are stored to internal memory; real‑time operating data is transmitted to upper‑level‑system via Modbus RTU communication bus.
Installation Requirements Install inside industrial control cabinet, adopt matched draw‑out socket base. Strictly follow CT‑VT‑RTD‑loop‑wiring official schematic drawing. Complete reliable protective‑grounding connection. Confirm field‑site ambient‑temperature range matches T‑model hardware capability. Set CT‑ratio and motor‑operating parameters during commissioning phase.
Usage Notes Confirm field‑CT secondary‑side output is 1 A for P1‑variant model. Check control‑power‑supply voltage falls within HI‑range specification. Do not disassemble draw‑out‑connector under live‑circuit status. Mandatory protection‑logic simulation‑test must be performed before commissioning online‑operation.
There are no reviews yet.