IP3752 digital motor protection

 IP3752 digital motor protection 1. Introduction IP3752 digital motor protection (hereinafter referred to as protector) is mainly used to protect the AC voltage 380V, frequency 50Hz, current 1000A following the various AC motors. Overload, locked rotor, light load imbalance / phase loss, overvoltage / undervoltage, short circuit, ground fault protection functions, and a maximum permissible breaking current protection and full parameter measurements (including a three-phase voltage / current, ground current , active / reactive power, power factor, frequency, active and reactive positive / negative energy and unbalanced rate and other parameters), operations control, telecommunications and other functions. The use of separate current transformers and main input required to meet the special or general purpose CT module used together. The Protection using measurement, protection, control-one design, real-time display of measured parameters, fault status, can be parameter setting, event records check and reset operations and other field operations, and can be connected via RS485 communication network or transmission output control center , so as industrial process control provides a scientific and effective field-level protection, monitoring and control unit. Widely used in chemical, petrochemical, building materials, metallurgy, marketing, environmental protection and other industries. 2. Product Features measuring function protection measure motor phase voltage / current, active / reactive power, power factor, frequency, active positive / negative energy, reactive positive / negative energy, but measurable electrical ground current , current imbalance rate, total running number (0 to 9999 days) and a single run (0 to 9999 days). Protection provide overload protection, short circuit, earth, stall, light load imbalance, phase loss, undervoltage, overvoltage and the maximum permissible breaking current protection and other protection. Fault warning function when the motor fault occurs in the protection operation time flashing fault type, fault value displayed simultaneously, and the operation time for the countdown; the corresponding downtime after the end of timing. Definite time and inverse-time overcurrent protection function can be selected as definite time or inverse time protection. Definite time protection time set by the user; inverse time protection time is based on the overload factor and calculated from the slope of the curve, the specific operation time See Table I, II or inverse time protection characteristic curve. Current limit alarm function (when Jb function is set to alarm) when the motor is in operation mode currents exceeding the current limit alarm setpoint, the alarm output protection countdown, countdown finishes were current limit protection alarm output. Control function has three relay outputs to meet the motor direct start, calls the delay from the start, or remotely start and stop, protection shut-down, arbitrarily set call delay from the start time (0 - 99.9 seconds), the motor can be realized in batches start. Communication function (optional, only for -C models) with RS485 interfaces, MODBUS-RTU communication protocol with RTU, PLC and a variety of computer control configuration software (iFIX, WinCC, Intouch, configuration king, MCGS) achieve network communications, the distributed motor comprehensive protection monitoring system. Transmitter output (optional, only for -A1 model) can choose to set A, B, C phase current of one phase or ground current transmission output DC4 ~ 20mA (factory default A-phase current corresponding to 0 ~ 1A DC4 ~ 20mA). Large screen dot matrix LCD uses 128 × 64 dot matrix LCD display the measurement results and parameters, clear and intuitive. Event logging functions when the motor current limit fault or alarm occurs, the protection is automatically the fault type and fault value records. Protection can record recent 10 current limit fault or alarm events, the latest in current limit fault or alarm events stored in the first one, in order recursive backward, appears another record current limit fault or alarm. Super EMC design all-EMC design, the protector has a strong anti-jamming capability, can work reliably in a variety of complex electromagnetic interference environment. Jiangxi Huajian Power Industry Co., Ltd. professional design and production of computer integrated protection devices, digital power meters, multi-function power meters, motor protection, energy meter rail, rail multi-function table, switchgear intelligent control devices, circuit breakers, double power automatic transfer switch, KBO control protection switch, leakage circuit breakers. In Electrical Equipment - high-voltage electrical industry was recognized by our customers. The company is located in Jiangxi Province Shang Lixian Pingxiang City, Jiangxi Province is the only home in the power electronics manufacturers, the company of "China in the letter, and health to a" business philosophy, the "customers first" principle to provide our clients with quality services. Please call to discuss business phone:! 18,879,987,399 18,879,990,399 Tel: 0799-3603528 QQ: 2880308227 Contact: Miss Zhu www.hjgroup.org