IMC-III

Programmable intelligent motor protection device applicable to various motor starting methods.

Features

Protection Function

  • Various protection factor for motor (8 protection factors)
  • Applicable to invertor circuits
  • Instantaneous power failure compensation and restart
  • Digital meter function

Convenience Function

  • Ease of installation
  • Wide current range
  • Function to save fault value and cause
  • Self-diagnosis and sequence monitoring
  • Total operating time and operating time setting

Communication Function

  • Various communication compatibilities (RS485 modbus and 4~20mA output)

Specification

Protection factor

RatingOperating conditionTimeRemark
Over
current
InverseOver 110% setting current1~60s/1s600% standard operating time
Definite timeOver 105% setting current1~60s/1sDelay time 1~200s
Phase faultOver 70% current phase unbalanceWithin 1.5sPhase fault rate = Maximum Phase Current - Minimum Phase Current / Maximum Phase Current ×100%
Phase unbalanceCurrent phase unbalance 30~50%Within 5s
Reverse phaseReverse the current phaseWithin 0.1sOver 110% minimum ratings
Under currentRating current 30~70%Within 3s
HoldingStallRating current 150~300%Within 5sDetection after over current setting time
Locked rotorRating current 200~700%Within 0.5s
Ground faultThe current rating 0.1~2.5A setting0.05~1.0sGround fault delay operation
Pre-alarmOver 120% setting valueBar-LED blinking

Sequence

RatingContents
Operating typeDirect operationNon-reversible direct operation
Y-▵ operationY operation time1~120s/1s
Y-▵ switching time0.05, 0.1, 0.2s
Forward / Reverse operatingReversible direct operation
ReactorReactor time1~120s/1s
InverterInverter delayed timeON 1sec/0.1sec
Instantaneous
under voltage
compensation
Compensation timeOFF 1~10s /1s
Re-operation delay time0~300s /1s
Under voltage detection(Rating control voltage × 65%) ± 10%
Re-operation delay time(Rating control voltage × 75%) ± 10%
Remote controlLocalLOP(Local Operation Panel)
MCCMotor Control Center
AutoPLC, DDC, DCS auto operation
RemoteModbus/RS-485 communication

Specification

RatingSpecification
Model   IMC-IIIa
Operating time Characteristic  Inv/Def time
Current range(A)   0.125~60A(Within 1 model)
Time setting (s) Inverse time  1~60sec/1sec(Class)
Definite timeD-Time *  1~200sec/1sec
O-Time *  1~60sec/1sec
Auto re-closing time  1~20min/1min, OFF
Control power Voltage  AC 110V or AC 220V(±15%)
Frequency  50/60Hz
Power consumption  Under 6W
Output contact (7EA) Capacity  5A/250VAC impedance load
Composition Operating contact 3a  Forward/Reverse, Y-Δ, Reactor, Inverter start
Condition contact 3a  Local, Auto indication
Trip contact 1a  Fault output contact
Input contact (8EA) Operating input 5a  Local, Auto, ETC
MC condition input 1a  MC condition monitoring
External trip 1a  Emergency stop
ZCT Ratings  200mA/0.1mA(ZCT)
Specification  ø25, ø40, ø80
Indication 7-Segment  3-Phase current, Trip cause, Settings
LED  Operating, Trip, System fail, Communication status
Self-Diagnostic  System fail LED and err indication
Communication(Option)   Modbus/RS-485 or 4~20mA
Installation   Inside the panel
Separate cable   MCT cable 2m base(4m cable option)
Insulation voltage   AC 2kV(1.5kV) / 1 min
Impulse voltage   Over AC 5kV(3kV), 1.2x50㎲
Insulation resistance   Over DC500V 10MΩ
Power frequency magnetic field   100A/m, 50Hz
Burst disturbance   Common 2.5kV
  Differential 1.0kV
Fast transients disturbance   Input 2kV, Other Input 1kV
Electrostatic Discharge   Air 8kV, Contact 6kV
RFI   30cm near electric wave by
  5W transceiver(230MHz)
EMI   AC power : 0.15~0.50MHz, Standard : 79dB, Average : 66dB
  0.50~30MHz, Standard : 73dB Average : 60dB
Operating temperature   -10 ~ 55℃
Storage temperature   -20 ~ 70℃
Relative humidity   Within 80% RH, no condensation
Standard   IEC 60255, IEC 61000-4, IEC 60068-2, EN 50081-2
Weight   0.6kg(MCT 0.35kg)
DimensionMain unit   148(W) × 100(H) × 74(D) mm
MCT  151(W) × 55(H) × 33(D) mm

* D-Time(Delay time) : It is delay time for IMC-IIIa start during motor start time
* O-time (Operating delay time) : When over current generates more then setting current, that makes it delayed until IMC-IIIa operated.

All in one

Hanoi Office

10th floor, 789 building, 147 Hoang Quoc Viet street, Cau Giay District, Ha Noi city, Vietnam

Hai Phong

LGE Factory - Tràng Duệ Industrial - An Dương District, Hải Phòng City

Da Nang

Văn phòng đối tác (HVN) 305 - Nguyễn Tất Thành - Hải Châu - Đà Nẵng

Ho Chi Minh Office

17th floor, Empress building, 138-142 Hai Ba Trung street, Da Kao ward, Distric 1, Ho Chi Minh city, Vietnam