ISEM2-WRUHS Schneider Intelligent Communication Motor Protector

ISEM2-WRUHS Schneider Intelligent Communication Motor Protector

EOCR-ISEM2-WRUHSIt is an intelligent motor protector under Schneider, which has comprehensive motor protection functions and is widely used in the field of industrial automation.

Core functions and parameter settings

• ‌overcurrent protection‌

• ‌IN (rated current)Set the rated operating current (unit: A) on the motor nameplate to simulate the motor's heating characteristics for thermal protection.

• ‌TCC (Overload Inverse Time Curve)Supports timed and inverse timed modes, suitable for motors with different starting characteristics.

• ‌OT (overcurrent action delay)Suggest setting it as3-5 secondsTo prevent short-term overcurrent misoperation.

• ‌locked-rotor protection‌

• ‌CS (blockage during startup): Set as3-8 times INUsed to detect mechanical jamming during the startup phase.

• ‌Ja/Jt (locked rotor during operation)Set the blocking current threshold and delay time to avoid burning out the motor during operation.

• ‌Three phase imbalance and phase loss protection‌

• ‌Cu (current imbalance rate): Can be set15%–50%Deviation exceeding triggers an alarm or trip.

• ‌PL (Phase Loss Protection)By default, it is enabled to prevent damage to the motor during single-phase operation.

• ‌Short circuit and grounding protection‌

• ‌SHD (short circuit action delay)Unit is in milliseconds, achieving fast tripping.

• ‌EC (Ground Fault Current)A leakage threshold can be set to detect insulation degradation or leakage faults.

• ‌Accessibility‌

• ‌DT (Start Delay)Suggest setting it as the actual measured starting time of the motor+1-2 secondsAvoid starting peak current.

• ‌RS (4-20mA analog output)Support remote transmission of current, load, and other data to DCS or PLC systems.

• ‌communication function: SupportModbus RTU / RS-485Protocol for remote monitoring and parameter modification.

• ‌Installation and power supply‌

• Installation method:rail mountingSave control cabinet space.

• Power Supply Voltage: SupportsAC/DC 100–240VStrong adaptability.

Operation precautions

• All parameter settings and wiring should be done inUnder power-off stateOperated by professional electrical personnel.

• After setting up, it is recommended to use a clamp meter to measure the current and verify the sampling accuracy.

• To restore factory settings, long press and hold simultaneouslyESC + SETExecute in 5 secondsrFoperation

ISEM2-WRUHS Schneider Intelligent Communication Motor Protector

Parameter Configuration

• ‌CT ratio setting (SEC/PAS)‌
  When the main circuit current is less than 0.5A, the cable should be wound around CT 2 or 5 times, corresponding to the settingPAS = 2tOr5tWhen connected to an external CT,SECSet as the secondary side transformation ratio (e.g. 200:5).

• ‌Voltage parameter setting (Va/Vb/Vc)‌
  Support direct connection to three-phase voltage systems with a voltage of ≤ 690V (such as 380V, 480V); Exceeding 690V requires voltage reduction through a voltage transformer (PT) before connection.

• ‌Grounding protection mode (ET)‌

• Set asINUse the built-in zero sequence transformer.

• Set asCTUsing an external zero sequence current transformer, suitable for leakage protection in high current systems.

• ‌Communication and Analog Output‌

• SupportModbus RTU protocolUpload operational data through RS-485 interface.

• RSThe output can be set as LC (linearly corresponding load current) for remote transmission to DCS or PLC systems.