Low Voltage Switchgear
Main, distribution, and end-of-line switchgear up to 600 V and 6000 A — selective coordination, arc-flash protection, and SCADA-ready layouts built to North American standards.
Selective Coordination from the Main to the Branch
Our low voltage switchgear lineups are engineered for institutional, industrial, and infrastructure applications where fault clearing speed, coordination integrity, and maintenance safety are non-negotiable. Every lineup is built in-house and tested before shipment.
- Air circuit breakers (ACBs) and moulded case circuit breakers (MCCBs)
- Main-tie-main (MTM) and double-ended substation configurations
- Zone-selective interlocking (ZSI) for fast, selective fault clearing
- Integrated revenue metering and power quality monitoring
- Indoor NEMA 1 or outdoor NEMA 3R / 4X enclosures
- Copper bus rated for continuous current with thermal bracing
What's Included
- ACBs and MCCBs with selective coordination
- Integrated revenue metering cubicle
- Main-tie-main configuration options
- Zone-selective interlocking (ZSI)
- Ground fault protection relay
- Copper bus bar — continuous rating with full bracing
- Front-accessible cable compartments (top or bottom entry)
- Metered and un-metered feeder sections
- Mimic bus with LED status indication
- Full-voltage control power transformer (CPT)
- +Arc-flash resistant (ARST) enclosure with pressure relief
- +Remote racking system for breaker withdrawal
- +Infrared inspection windows at bus joints
- +Bus differential protection relay (87B)
- +High-resistance grounding (HRG) system
- +Remote monitoring gateway (Modbus / IEC 61850)
- +Witnessed factory acceptance testing (FAT)
- +Power quality analyser integration
- +Emergency power-off (EPO) module
Full Specifications
| Parameter | Value |
|---|---|
| Voltage Class | Up to 600 V (208/347/480/600 V) |
| Main Current Rating | Up to 6000 A (continuous) |
| Interrupting Rating | Up to 85 kA symmetrical |
| Bus Material | Copper, silver-plated contact surfaces |
| Enclosure | NEMA 1, 3R, or 4X |
| Breaker Technology | ACB (Air Circuit Breaker), MCCB |
| Protection Relays | LSIG, ZSI, ground fault (50/51G) |
| Metering | Revenue-grade metering, power quality analyser |
| Control Power | 120 V AC via CPT; battery backup option |
| Finish | ANSI 61 grey powder coat; custom colour available |
| Standards | UL 1558, CSA C22.2 No. 31, NEMA PB 2 |
| Lead Time | 4–10 weeks typical; expedited available |
Built to Standard
Where It's Used
- Main switchgear in hospitals and healthcare facilities
- Data centre primary and secondary distribution
- University campuses and institutional buildings
- Industrial plant main and sub-distribution
- Commercial high-rise and mixed-use towers
- Transit and transportation facilities
- Mining surface substations
- Service entrance (utility point of delivery)
From design and specification through factory testing, commissioning, and ongoing maintenance — Candron delivers at every phase.
- Engineering drawings and coordination studies
- Factory acceptance testing (FAT) with full reports
- Site commissioning and protection settings
- Spare parts, training, and maintenance support
Common Questions
Low voltage switchgear (UL 1558) is designed for higher short-circuit current ratings and includes protective relay functions for selective fault isolation. Switchboards (UL 891) focus on LV branch distribution and metering — they are typically not rated for the same interrupting levels as switchgear.
Yes — we deliver arc-flash hazard analysis studies, PPE level labels, and mitigation strategies such as zone-selective interlocking (ZSI) and high-resistance grounding (HRG), coordinated with your utility protection settings.
Yes. Witnessed FAT is available for your project team or a third-party inspector. Tests include insulation resistance, primary injection, contact resistance, relay functional, and full operational checks — with a comprehensive documentation package.
Standard lead times are 4–10 weeks from drawing approval, depending on scope and current shop loading. Expedited schedules are available — contact us to discuss your project timeline.
Ready to Spec
Your Project?
Our engineering team responds with specs, lead times, and pricing the same day. Tell us what you need:
- Service voltage and main current rating
- Single-line diagram and utility interconnection requirements
- Indoor/outdoor and enclosure type (NEMA 1 / 3R / 4X)
- Metering requirements (revenue or sub-metering)
- Relay / protection package and SCADA gateway needs
- Arc-flash study requirements
Send us your project details and we'll respond with a price, lead time, and any clarifying questions — typically within a few hours.
Request a Quote →Or call us directly