UL845 MCC (MotorControlCenters)

UL845: UL845 – Professional-level Security and Performance of MCC

In the field of complicated industrial drive system, MCC is the core hinge of driving production, and its integration and reliability are related to the safety and efficiency of entire factory operation. UL845 Standard is established for this critical equipment, and exceeds supreme safety and performance principles of ordinary distribution cabinet. Since we obtain UL Factory Certification in 2014, we consistently integrate core element of UL845 into design & manufacture of MCC, and dedicate to provide safety, intelligent and ultimate solutions of for drive and control application.

A, What is UL845?

UL845 is the standard for motor control centers developed by UL. It is safety and performance standard of centralized and modularized motor control equipment. By contrast with UL508A and UL891 Standard emphasizing safety certification, the requirement of UL845 is comprehensive, rigorous, and covering overall system level from structural strength, temperature rise control through to fault protection.

UL845 Core Orientation

· UL845 Standard is the specification of complete motor control center instead of individual control unit.

· UL845 represents supreme level in the field of MCC, and preferred safety certification in the field of heavy industry, process industry and commercial facilities.

· UL845 specification is to guarantee outstanding performance and supreme security of MCC under ‌high-density, full-load, continuous, and rigorous circumstances.

In brief, MCC with UL845 Certification is “Drive Control Center” that is completely verified and highly integrated.

B, UL845 Core Requirement illumination – Transnormal Exhibition of Professional

1. Structural Integrity and Busbar System

o Requirement: Enclosure must utilize solid overall structure. Vertical busbar and horizontal busbar must verify rated current temperature rise test and tolerance test of dynamic and thermal stability‌.

o Exhibition of Professional: Our MCC utilize modularized design and high-strength frame, and precisely calculated and simulating optimized busbar system to guarantee temperature rise lower than limited value and superior short-circuit endurance under long-term and full-load operation.

2. Compartment Isolation and Security

o Requirement: Each compartment (e.g. circuit breaker, VFD and soft starter) must be completely isolated to guarantee safety and convenient operation, maintenance, and service of each compartment without interrupting continuous busbar segment.

o Exhibition of Professional: Our MCC is equipped with reliable mechanical interlock and programmed lock to guarantee compartment door can be opened in the position of “Off/Test”, eliminate risk of are due to incorrect manipulation, and assure maintenance personnel’s safety.

3. Arc Fault Detection Capacity

o Requirement: UL845 require to provide protective measures of internal arc fault and minimize the impact scope of the fault.

o Exhibition of Professional: This is exhibition of our core technology advantage. By means of specific pressure release channel design, reinforcement of structural strength and directional pressure release technology, our MCC is able to effectively resist and restrict high-temperature and high-pressure gas and flame, direct arc energy to designated safety region, and protect personal and adjacent equipment.

4. Temperature Rise Performance, Ventilation and Heat Dissipation‌

o Requirement: Under 110% rated current, temperature rise of all live parts (e.g. busbar, wiring point) and compartment inside must be lower than limited value.

o Exhibition of Professional: We apply proper design of ventilation and heat dissipation, premium conductor and advanced connection process to guarantee MCC possess outstanding heat dissipation performance under any circumstances, and eliminate insulation aging and fault due to overheat.

5. Intelligent Management and Control

o Requirement: UL845 specify integration of intelligent and control unit including but not limited to monitor status of motor circuit, fault diagnosis and network communication.

o Exhibition of Professional: We are able to provide advanced MCC solution that integrated intelligent motor protector, network port and remote monitoring system to assist you achieve predictive maintenance and digital energy efficiency management, and significantly improve operation efficiency.

C, Why is UL845 certification essential to MCC?

Choosing MCC with UL845 Certification Mark represents your core drive system possess:

· Supreme System-level Safety: Passed comprehensive and ultimate test including but not limited to structure, insulation, arc, temperature rise, etc. Provided exceeding ordinary MCC and incomparable security.

· Incomparable Reliability: Intended for 24/7 continuous operation in industrial environment. Reduce loss of ‌unplanned downtime due to MCC fault.

· Outstanding Operation and Convenient Maintenance: Modularized design and Compartment isolation is to make maintenance be safety and quick and improve operation and maintenance efficiency.

· Legal Liability Definition: In the event of an electrical incident, use of UL noncertified MCC will face serious risk of legal liability and insurance. However, use of UL certified MCC will verify you have performed duty of due diligence, and clarify and reduce legal liability.

UL845 Standard is touchstone to evaluate whether MCC reach supreme principle of industrial grade. It, by no means product safety certification, is exhibition for comprehensive technical strength and QMS of manufacturer. As senior UL Certification Factory, our deliverable MCC is carrying profound comprehension and strict implementation of UL845.

Committing your factory “Drive Heart” to us is choosing a reliable guarantee that cast through ten years pro (ten years of professional experience) and global top-level safety standards.