UL1558 LV Switchgear

UL1558： Professional Barrier of Industrial Grade LV Switchgear

LV Switchgear is the core device to guarantee reliability and safety of power supply in power distribution system of industry. UL1558, as one of the most authoritative safety standards in this field, defines the highest technical requirements for LV Switchgear in the industrial control field. Since we obtain UL Factory Certification in 2014, we consistently integrate core element of UL1558 into design & manufacture of LV Switchgear, and provide you solution of real industrial grade LV Switchgear.

A, What is UL1558?

UL1558 is the standard of Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear developed by UL. It is an authoritative safety standard for Low-Voltage Power Circuit Breaker Switchgear normally rated at 1000V AC or less.

UL1558 Core Orientation

· UL1558 is the standard for industrial grade and heavy-duty LV Switchgear.

· By contrast with UL891 (Switchboard), UL1558 has more stringent requirements in terms of structural strength, fault tolerance and safety.

· UL1558 Standard guarantees LV Switchgear is able to operate under industrial environment.‌

In brief, LV Switchgear with UL1558 Certification intends for “Heavy Duty” device in industrial environment.

B, UL1558 Core Requirement illumination- Exhibition of Professional and Safety

1. Mechanical Strength and Electrical Durability

o Requirement: Enclosure must utilize welded mechanical connection or equivalent strength and pass rigorous mechanical operation test.

o Exhibition of Professional: Our LV Switchgear utilize reinforced frame to guarantee structural integrity under frequent operation and mechanical stress, and eliminate risk of deformation

2. Short-Circuit Current Rating (SCCR)

o Requirement: LV Switchgear must mark maximum short-circuit current rating and pass test verification

o Exhibition of Professional: We apply precise short-circuit calculation and complete type test to guarantee LV Switchgear can safely withstand short-circuit current of 200kA, and prohibit fault expansion.

3. Arc Fault Protection

o Requirement: Must concern protective measures of internal arc fault including pressure release device and structural strength.

o Exhibition of Professional: We design specific pressure release channel and reinforced structure of door sheet to minimize fault effects under extreme circumstances.

4. Clearance and Creepage Distance

o Requirement: LV Switchgear must comply with requirement of clearance under different voltage, and insulation reliability.

o Exhibition of Professional: We utilize proper layout design and professional insulation design to guarantee safety operation under humid and dusty industrial environment.

5. Certification and Compatibility of Component

o Requirement: Critical components in LV Switchgear must be equipped with UL certification, and overall assembly must pass the review of UL.

o Exhibition of Professional: We carefully select components with UL Certification, and verify compatibility of system to guarantee the coordinated operation of entire LV Switchgear.

C, Why is UL 1558 essential？

Choosing LV Switchgear with UL1558 Certification represents:

· Supreme Security Level: Rigorous test verification is to guarantee furthest protect personal and equipment safety.

· Outstanding Reliability: Industrial design standard is to guarantee long-term and stable operation of LV Switchgear under rigorous circumstances.

· Professional Technical Assurance: Certification process requires profound technical accumulation and complete QMS.

· Recognition of Legislation and Insurance: Recognition of insurance company is to provide liability coverage in case of incident.

Important Note:
LV Switchgear with UL1558 Certification must be designed, manufactured and installed by professional team.  Unprofessional design and installation may cause serious ‌safety incidents and property losses.

D, Our Professional Commitment

As an enterprise obtained UL Factory Certification since 2014, we commit:

· Each LV Switchgear comply with UL1558 Standard to design and manufacture.

· Provide complete UL Mark and technical documents.

· Provide you full-service technical support via accomplished professional teams.

· Guarantee product quality control from design phase to delivery phase.