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Low Voltage Switchgear
Low-voltage switchgear provides short-circuit and overload protection via low-voltage power circuit breakers (LV-PCB) with integral trip units. These low-voltage circuit breakers are typically through-the-door, draw-out devices.
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LV Switchgear Solutions
Low-voltage switchgear reliably delivers electrical energy to equipment loads such as lighting and motors, characterized by high safety and reliability. It helps reduce safety risks and saves on operation and maintenance costs.
Low-voltage (LV) switchgear refers to complete sets of equipment used in ≤1 kV (usually 400 V/690 V) power distribution systems, including incoming line cabinets, feeder cabinets, capacitor compensation cabinets, dual power supply switching cabinets, etc., which undertake distribution, control, protection and monitoring functions.
Low-voltage switchgear cabinet
Distribution Box
CATALOGUE
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Why Choose TOONICE’s Low Voltage Switchgear?
High-Reliability Power Supply
Fault isolation ≤200ms, SAIDI reduced by 50%–75%
Intrinsically Safe
Arc flash <5ms, accidents reduced by >90%
Cost Reduction and Efficiency Improvement
Inspection reduced by 50%, annual savings of 100,000-300,000 RMB
Extremely Space-Saving
Single cabinet ≤36 circuits, floor space reduced by 40%
Green and Energy-Saving
Energy efficiency improved by 8%, annual electricity savings of 100,000+ kWh
FAQs
Why is it called a “ring” main unit?
Because it’s used in a ring (loop) network, where power can flow from two directions. If one side fails, supply continues from the other side, better reliability.
What voltage levels do RMUs operate at?
Typically:
- 6 kV
- 11 kV
- 22 kV
- 33 kV
What is SF₆ in RMUs, and is it safe?
SF₆is a gas with excellent insulation properties
Safe when sealed, but it’s a greenhouse gas
Many manufacturers now offer SF₆-free RMUs due to environmental regulations
How often do RMUs require maintenance?
Gas-insulated RMUs: Very low (often 10–20 years)
Solid insulated RMUs: Minimal
Routine inspections still recommended per utility standards
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