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Hyundai Electric HGP MCCB ETU N/D/A/E User Manual

Electronic trip units
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HGP MCCB ETU N/D/A/E
Electronic Trip Units
User Guide
09/2019
1 / 32

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Summary of Contents for Hyundai Electric HGP MCCB ETU N/D/A/E

  • Page 1 HGP MCCB ETU N/D/A/E Electronic Trip Units User Guide 09/2019 1 / 32...

  • Page 2: Table Of Contents

    Contents Product summary............................5 Protection ..............................18 Measurement function ..........................27 Alarm ................................30 Trouble shooting............................31 2 / 32...
  • Page 3 Electric, given in writing. You also agree not to establish any hypertext links to this document or its content. Hyundai Electric does not grant any right or license for the personal and noncommercial use of the document or its content, except for a non- exclusive license to consult it on an "as is"...

  • Page 4: Safety Precautions

     Do not allow foreign substances such as screws, metal objects, water or oil to be in the product. Electrical equipment must be installed, operated and maintained by trained personnel. If not, Hyundai Electric & Energy Systems Co., LTD will not be responsible for any consequences resulting from the use of the equipment.

  • Page 5: Product Summary

    1. Product summary Product outline 1.1. ETU (Electrical trip unit) N type 1.2. ETU N type applies to protection of switchgears and general industrial use. It protects against long time, short time, and instant. It is possible to adjust the pick-up of long time and short time using the front adjustment dial. Time delay of long time and short time is fixed, and pickup of instant is fixed according to the rating of HGP MCCB.
  • Page 6 Name Description Indicate the In (A) value of ETU for each AF. 250AF: 40A, 100A, 160A, 250A Sensor rating 630AF: 250A, 400A, 630A 800AF: 800A ex) In = 250A When the ETU is operating, user can check the replacement time of the battery by pressing this button.
  • Page 7 It is possible for A/E type to check measurement value and protection setting information through communication at SCADA Name Description Indicate the In (A) value of ETU for each AF. 250AF: 40A, 100A, 160A, 250A Sensor rating 630AF: 250A, 400A, 630A 800AF: 800A ex) In = 250A When the ETU is operating, the displayed information can be switched, and...
  • Page 8 MCCB open. Check the LED, and turn off the LED by pressing “Battery check/Reset” button. ㆍ Alarm: Blink (when I > 0.9 Ir), On (when I > 1.1Ir) Test terminal for checking ETU operation. Test Terminal Refer to the manual of Test kit for more information. LCD shows load current, voltage and relay setting information.
  • Page 9 LCD operation and setting 1.6. Main screen displays current which is true rms value. There are 5 kinds of LCD display mode. User can switch the screen with Mode/Reset button and move to protective elements setting mode by pressing Mode/Reset and Enter button. ...
  • Page 10 1.6.1. Measurement value display mode User can move to the display of each phase information with button. The phase information is displayed sequentially and periodically with certain period. In case of E type, user can switch Current ↔ Voltage ↔ Power ↔ Energy menus with button.
  • Page 11 11 / 32...
  • Page 12 1.6.2. Protective elements setting information display mode User can move to the display of each information with button. 12 / 32...
  • Page 13 13 / 32...
  • Page 14 1.6.3. Protective elements setting mode In protective elements setting information mode, (lock) icons are displayed. While lock icon is displayed, the setting information cannot be changed. If Mode/Reset and Enter button are pressed simultaneously for more than 3 seconds, the lock icon disappears.
  • Page 15 15 / 32...
  • Page 16 1.6.3.2. Communication setting ETU transfers information to SCADA through Modbus-RTU. Refer to the ETU Modbus profile manual for more information.  Protocol: RS-485, Modbus-RTU  Start bit: 1 bit  Data bit: 8 bit  Parity: none (fixed)  Stop bit: 2 bit(fixed) ...
  • Page 17 1.6.3.3. Thermal on/off HGP MCCB has ‘Thermal image’ function. This function is for simulating the thermal energy of the bus bar that flows on the normal phase to prevent fire due to heat and to protect the equipment. Cooling time is 20 minutes before and after trip. It is possible to deactivate the Thermal memory function under certain circumstances in the following setting screen.

  • Page 18: Protection

    1.6.3.4. ENCT / ENVT connection This function is to measure the current and voltage flowing in the neutral conductor by connecting the neutral line to the 3-phase MCCB. In order to use the ENCT function, supplied NCT must be connected. In order to measure the phase voltage in 3-phase MCCB, ENCT function must be activated.
  • Page 19 L Long-time protection Pick-up [A] Ir = dial setting 0.4 00.45 0.5 0.56 0.63 0.7 Time delay [s] tr = Fixed 1.5 x Ir accuracy ±20% 6 x Ir 7.2 x Ir Thermal memory 20 minutes Thermal Memory Thermal Memory function is to cool the conductor in HGP MCCB after trip. The cooling time is 20 minutes before and after trip.
  • Page 20 It protects switchboards and device against very large short circuit current. The instantaneous protection works as a definite time at Ii pickup setting value without time delay. Ii is fixed according to rated current(In) I Instantaneous protection Pick-up [A] accuracy ±15% In= 40 A In= 100 A 1500...
  • Page 21 Switchboard and devices are protected against overload with adjustable pickup and time delay settings. The pickup setting can be set in 1A increments precisely. For long time protection, the inverse time curve is applied, and the Thermal image function is included. L Long-time protection Pick-up [A] dial setting...
  • Page 22 max time 0.14 0.2 0.32 0.5 2.2.3. Instantaneous protection Switchboard and devices are protected against very large short circuit current. The instantaneous protection works as a definite time at Ii pickup setting value without time delay. I Instantaneous protection In= 40A Pick-up [A] Ii= In x In= 100A...
  • Page 23  1: Neutral line is protected at the Ir setting.  1.6: Neutral line is protected at 1.6 times the Ir setting. However, in the range exceeding 0.63 times the rated value, the neutral wire is protected at 1time. IN Neutral protection Pick-up IN=Ir x OFF 0.5...
  • Page 24 2.2.6. Characteristic curve 2.2.6.1. ETU N type 24 / 32...
  • Page 25 2.2.6.2. ETU D/A/E type 25 / 32...
  • Page 26 26 / 32...

  • Page 27: Measurement Function

    3. Measurement function Instantaneous value 3.1. The current of each phase is measured as true rms value. ETU E type measures current and voltage of each phase. ㆍ 3P : phase-to-phase voltage, 4P: phase voltage ETU D/A/E type shows current, voltage, and power through front LCD. Ground fault current measurement 3.2.
  • Page 28 3.4.2. Voltage For 3P circuit breaker, phase-to-phase voltage is measured. The phase of phase-to-phase voltage is not measured. Display Measurement Unit ETU LCD Communication Vr phase voltage / Vrs phase-to-phase voltage Vs phase voltage / Vst phase-to-phase voltage Vt phase voltage / Vtr phase-to-phase voltage Max phase-to-phase voltage Min phase-to-phase voltage Average phase-to-phase voltage...
  • Page 29 Display Measurement Unit ETU LCD Communication Total active power Total reactive power kVARh Total apparent power Phase active power Phase reactive power kVAR Phase apparent power Phase inverse active power Phase inverse reactive power kVARh 3.4.5. Demand current, demand power Average value calculated within certain time(demand time) is displayed.

  • Page 30: Alarm

    Power supply line can be connected to the top or bottom of the HGP MCCB. The sign of power is basically set to (+) when power supply line is connected to the upper part and the load is connected to the lower part, so that the power flow occurs.

  • Page 31: Trouble Shooting

    I-unbal setting OFF / ALARM I-unbal PICKUP setting value 5 to 60 1% step I-unbal DROPOUT setting value 5 to I-unbal PICKUP setting value 1% step I-unbal PICKUP DELAY setting value 1 to 1500 1s step I-unbal DROPOUT DELAY setting value 1 to 1500 1s step UFR setting...
  • Page 32 Communication parameter settings (address, baud rate) visual inspection connect only A, E types to Modbus network. and functional visually check the setting of comm. parameter on the LCD of ETU testing communication replacement. (see HGP catalog – ETU display) error Polling period that the master request on is over 500ms (recommended.

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