Substation & VCB Panels
Supplies continuous DC power for Vacuum Circuit Breakers, operating trip coils, close coils, and auxiliary protection relays in high-voltage and medium-voltage substations.
Switchgear & Substation Power Systems
Micro Power engineered DC Power Packs with Battery Backup serve as a mission-critical auxiliary power source specifically built for Vacuum Circuit Breakers (VCB panels), protection relays, sub-station trip coils, and automation control systems (PLC, HMI, SCADA).
In electrical substations and industrial plants, power supply reliability during utility mains failure is non-negotiable. Our DC power packs provide seamless continuous direct current to operate closing and tripping coils under high-inrush pulse loads, ensuring uninterrupted circuit breaker tripping protection even when total grid breakdown occurs.
Technical Capabilities
Built to perform in demanding ambient conditions with high isolation, zero-switchover latency, and advanced multi-stage battery preservation circuitry.
| Parameter | Standard Specification Range | Custom OEM Options |
|---|---|---|
| Input AC Voltage | 110V – 270V AC, 1-Phase, 47Hz – 63Hz | Wide range input (90V – 300V AC), 3-Phase optional |
| Nominal Output DC Voltage | 24V DC, 48V DC, 110V DC, 220V DC | Custom DC output voltages tailored to specification |
| Transfer Time (AC to DC Backup) | 0 ms (Zero Transfer Time) – Online continuous DC bus | Instantaneous static switching topology |
| Battery Backup Configurations | Inbuilt Sealed Lead-Acid (VRLA) or external battery interface | LiFePO4 compatibility, custom Ah sizing |
| Protections & Safeguards | Over-voltage, short-circuit, battery deep discharge cutoff, reverse polarity protection | Potential-free alarm contacts for remote SCADA integration |
| Operating Temperature | -10°C to +60°C continuous operating environment | Tropicalized conformal coating for humid/dusty sites |
| Enclosure Construction | Heavy-duty IP30 / IP54 powder-coated metal enclosure | 19-inch rack-mount or custom panel mounting plates |
Product Distinction
30+ years of power electronics expertise combined with 100% in-house manufacturing, burn-in testing, and rigorous component screening.
Engineered to handle heavy impulse energy demanded by VCB tripping and closing coils without dropping the system voltage bus.
Built-in intelligence prevents battery deep-discharge, thermal runaway, and over-charging to maximize overall battery operating life.
Saves valuable space inside modern compact switchgear panels and control cabinets, streamlining internal panel wiring.
Manufactured on a 100% anti-static shop floor with full component screening, thermal testing, and 100% full-load burn-in testing.
Deployment Verticals
Supplies continuous DC power for Vacuum Circuit Breakers, operating trip coils, close coils, and auxiliary protection relays in high-voltage and medium-voltage substations.
Maintains uninterrupted telemetry, digital control loops, and HMI display power during severe industrial power spikes or brownouts.
Provides robust backup power for critical remote terminal units (RTUs), smart metering infrastructure, and automated switchyard panels.
Buyer Questions
A DC Power Pack converts AC mains supply into regulated DC voltage to power auxiliary circuits, numerical relays, and trip/close coils in VCB panels. Its built-in or connected battery ensures that even if AC power fails entirely, electrical protective relays remain energized to trip circuit breakers safely under fault conditions.
Choose an inbuilt battery model if space inside your VCB control cabinet is restricted and short-term backup (e.g., 5 to 30 minutes for relay operations and breaker tripping pulses) is sufficient. Choose an external battery configuration when continuous backup runtime of several hours to 24 hours is required for SCADA controllers and auxiliary monitoring.
Yes. Our in-house R&D team customizes output voltages (including 24V, 30V, 48V, 110V, and 220V DC), mechanical mounting enclosures, alarm terminal contacts, and charging currents to match international project standards.
Get in touch with our power electronics application engineers to select or customize the perfect DC Power Pack system for your project specifications.