LS Industrial UVT-220 MCCB Under Voltage Trip Instruction Manual

1. ບົດແນະນຳ

This manual provides essential information for the safe and effective installation, operation, and maintenance of the LS Industrial UVT-220 Under Voltage Trip. The UVT-220 is an accessory designed for use with LS Industrial Susol UT Series Molded Case Circuit Breakers (MCCBs) to provide under-voltage ການປົກປ້ອງ.

It is compatible with UTS150/250A, UTS400/600A, and TD125-TS800 Frame MCCBs.

2. ຂໍ້ມູນຄວາມປອດໄພ

ຄຳເຕືອນ: ອັນຕະລາຍຈາກໄຟຟ້າຊອດ. ການຕິດຕັ້ງແລະການບໍາລຸງຮັກສາຄວນຈະຖືກປະຕິບັດໂດຍບຸກຄະລາກອນທີ່ມີຄຸນວຸດທິເທົ່ານັ້ນ.

• ຕັດການເຊື່ອມຕໍ່ໄຟຟ້າທຸກເທື່ອກ່ອນທີ່ຈະຕິດຕັ້ງ, ໃຫ້ບໍລິການ, ຫຼືຖອດອຸປະກອນອອກ.
• ໃຫ້ແນ່ໃຈວ່າລະຫັດໄຟຟ້າໃນທ້ອງຖິ່ນແລະແຫ່ງຊາດທັງຫມົດຖືກປະຕິບັດຕາມ.
• ໃຊ້ອຸປະກອນປ້ອງກັນສ່ວນບຸກຄົນທີ່ເຫມາະສົມ (PPE).
• ຢືນຢັນ voltage ແລະການຈັດອັນດັບໃນປະຈຸບັນກ່ອນທີ່ຈະເຊື່ອມຕໍ່.
• ຢ່າໃຊ້ອຸປະກອນຖ້າມັນປະກົດວ່າເສຍຫາຍ.

3. ຜະລິດຕະພັນເກີນview

The LS Industrial UVT-220 is an Under Voltage Trip (UVT) unit designed to automatically trip a Molded Case Circuit Breaker (MCCB) when the supply voltage drops below a predetermined level. This protects connected equipment from damage due to insufficient voltage and ensures safety by disconnecting power during brownouts or power failures.

The unit operates on 220-240V AC or 250V DC.

ຮູບທີ 1: LS Industrial UVT-220 Under Voltage Trip unit. This image shows the compact, rectangular device with two screw terminals labeled D1 and D2, and a label indicating "UNDER VOLTAGE TRIP" along with AC and DC voltage markings. The unit is designed to be integrated with compatible MCCBs.

4. ການຕິດຕັ້ງແລະການຕິດຕັ້ງ

The UVT-220 is an internal accessory for compatible LS Industrial MCCBs. Refer to the specific MCCB manual for detailed installation instructions, as the procedure may vary slightly depending on the MCCB frame size and model.

1. ການຕັດການເຊື່ອມຕໍ່ໄຟຟ້າ: Ensure all power to the MCCB and associated circuits is completely disconnected and locked out.
2. MCCB Access: Open the MCCB cover or access panel as per the MCCB's instruction manual.
3. UVT Insertion: Carefully insert the UVT-220 into its designated slot within the MCCB. Ensure it is seated correctly and securely.
4. ສາຍໄຟ: Connect the control circuit wiring to the terminals D1 and D2 on the UVT-220. Ensure correct polarity for DC applications. The UVT requires a continuous voltage supply to remain in the "set" position.
5. ການເຊື່ອມຕໍ່ທີ່ປອດໄພ: Tighten screws terminal ທັງຫມົດກັບ torque ທີ່ກໍານົດໄວ້.
6. ປະກອບຄືນໃໝ່: Close and secure the MCCB cover or access panel.
7. ການທົດສອບ: After installation, carefully re-energize the circuit and perform functional tests to ensure the UVT operates as intended (e.g., simulate an under-voltage condition if safely possible, or verify the MCCB can be manually reset).

Note: Professional installation by a certified electrician is highly recommended.

5. ຫຼັກການດຳເນີນງານ

The UVT-220 continuously monitors the voltage of the control circuit connected to its terminals. When the monitored voltage drops below a factory-set threshold (typically 35% to 70% of the rated voltage, depending on the specific model and standard), the UVT mechanism activates, causing the associated MCCB to trip and open its contacts. This action disconnects the load from the power supply.

The MCCB cannot be reset or closed until the voltage returns to an acceptable level (typically 85% or more of the rated voltage) and the UVT is reset (either automatically or by the MCCB's reset mechanism, depending on the MCCB design).

6. ບໍາລຸງຮັກສາ

The LS Industrial UVT-220 is designed for reliable operation with minimal maintenance. However, periodic checks are recommended to ensure continued functionality:

• ການກວດກາສາຍຕາ: Periodically inspect the UVT and its connections for any signs of physical damage, corrosion, or loose wiring.
• ຄວາມສົມບູນຂອງການເຊື່ອມຕໍ່: Ensure all terminal connections remain tight.
• ການທົດສອບການທໍາງານ: If possible and safe to do so, periodically test the UVT's tripping function by simulating an under-voltage condition or using the MCCB's test button (if applicable and designed to test accessories).
• ທໍາຄວາມສະອາດ: Keep the area around the MCCB and UVT free from dust and debris.

Any maintenance or repair work should be carried out by qualified personnel.

7. ການແກ້ໄຂບັນຫາ

This section addresses common issues that may arise with the UVT-220.

• MCCB does not trip on under-voltage:
  • Verify the control voltage supply to the UVT terminals (D1, D2) is present and within the specified range.
  • ກວດສອບການເຊື່ອມຕໍ່ສາຍໄຟທີ່ວ່າງ ຫຼື ບໍ່ຖືກຕ້ອງ.
  • Ensure the UVT is correctly installed and seated within the MCCB.
  • The UVT unit itself may be faulty and require replacement.
• MCCB trips unexpectedly or cannot be reset:
  • ກວດສອບການສະຫນອງ voltage. If it is below the UVT's tripping threshold, the UVT is functioning correctly. The MCCB cannot be reset until the voltage ຟື້ນຕົວ.
  • Verify the control voltage supply to the UVT terminals (D1, D2) is stable and not experiencing intermittent drops.
  • Ensure the UVT is compatible with the specific MCCB model.
  • The UVT unit may be faulty and require replacement.

If troubleshooting steps do not resolve the issue, contact a qualified electrician or LS Industrial technical support.

8. ຂໍ້ມູນຈໍາເພາະ

Note: Other specifications like Current Rating, Circuit Breaker Type, Mounting Type, and Number of Poles refer to the compatible MCCB, not the UVT-220 accessory itself.

9. ການຮັບປະກັນແລະການສະຫນັບສະຫນູນ

For warranty information, technical support, or service inquiries regarding the LS Industrial UVT-220, please contact your authorized LS Industrial dealer or visit the official LS Industrial webເວັບໄຊ. ຮັກສາໃບຮັບເງິນການຊື້ຂອງທ່ານສໍາລັບການຮ້ອງຂໍການຮັບປະກັນ.