Description:
The ABB 1VCR000993G0002 is an internal Switch-Mode Power Supply Board / PCB Assembly manufactured by ABB, commonly deployed inside ABB medium-voltage drive door units (INU cabinets), control cubicles, or as an auxiliary PSU in DCS/relay subracks. It converts a wide-range AC mains input (typically 88–264 V AC) into regulated low-voltage DC outputs—most commonly 24 V DC for control logic and 5 V DC / ±12 V DC for internal electronics—with galvanic isolation between primary and secondary sides to protect sensitive measurement and communication circuits from mains-borne transients.
Application Scenarios:
Consider a steel plant’s coiler drive where the ABB medium-voltage inverter’s door-mounted control section houses the AAR01 adapter board, A3 logic supply, and local I/O—all powered by a single ABB 1VCR000993G0002 power supply board. After 15 years of service, the original board’s electrolytic capacitors began drying out, causing intermittent 24 V DC sag that led to spurious “Loss of Adapter Board” alarms during high-load periods. The maintenance team sourced a direct-replacement 1VCR000993G0002, powered down the door auxiliary disconnect, unplugged the AC input and DC output headers, swapped the board, and re-energized. The new unit accepted the existing 230 V AC station supply unchanged, delivered clean 24 V DC to the control electronics, and the intermittent alarm disappeared immediately—saving a potential forced outage on a critical rolling line. The module’s compact PCB form factor and chassis-mount holes allowed installation in under 10 minutes with zero rewiring of the field-side DC distribution.
Parameter:
| Main Parameters | Value/Description |
|---|---|
| Product Model | 1VCR000993G0002 |
| Manufacturer | ABB (ABB Drives / Power Systems Division) |
| Product Category | Internal Switch-Mode Power Supply Board / PCB Assembly (PSU) |
| Typical Application | ABB MV Drive INU Door Electronics, DCS/Relay Subrack Aux Power, Control Cubicle DC Distribution |
| Input Voltage | 88 – 264 V AC (auto-ranging), 47–63 Hz; some variants accept 110–250 V DC |
| Output Voltage(s) | Primary: 24 V DC regulated; Secondary: 5 V DC and/or ±12 V DC (per load requirement of host system) |
| Rated Output Current | 24 V DC @ approx. 5 A (120 W typical; exact total depends on auxiliary rail loading) |
| Efficiency | ≥ 85–88 % typical at full load |
| Isolation Voltage | Input–Output ≥ 1500 V AC (galvanic isolation per IEC 60950 / IEC 60664) |
| Protection Features | Short-circuit, overload (hiccup mode), over-temperature, in-rush current limiting |
| Status Indication | Onboard LED (green = output OK; off or red = fault / no AC input) |
| Cooling / Enclosure | Natural convection (fanless); open-frame PCB with metal mounting flanges / standoffs |
| Mounting Method | Chassis mount via M3/M4 screw holes or guide-slot in designated PSU location inside enclosure |
| Operating Temperature | –10 °C to +60 °C (derating above 50 °C typical); storage –40 °C to +85 °C |
| Dimensions (approx.) | 130 × 90 × 35 mm (L × W × H), Weight ≈ 0.30–0.45 kg |
| Certifications | CE, UL / cULus (per system certification), RoHS-compliant |
Technical Principles and Innovative Values:
- Innovation Point 1: Universal Auto-Ranging AC Input with Active PFC. The ABB 1VCR000993G0002 accepts worldwide mains voltages (88–264 V AC) without a voltage selector switch, making it suitable for multinational projects and plants with uncertain supply specifications. Active Power Factor Correction reduces input harmonic current draw versus linear transformers.
- Innovation Point 2: Multi-Rail DC Generation with Tight Regulation. Rather than providing only 24 V DC, the board typically generates and stabilizes multiple internal voltage rails (5 V for logic, ±12 V for analog/I/O where required), ensuring the downstream adapter boards, gate-pulse amps, and communication cards receive clean, ripple-free power—critical for accurate A/D conversion and noise-free fiber-optic signaling.
- Innovation Point 3: Galvanic Isolation & Hiccup-Mode Overload Recovery. The primary–secondary isolation barrier protects sensitive control electronics from mains transients and ground loops. In an overload condition the 1VCR000993G0002 enters “hiccup” mode (cycling off/on) rather than latching off permanently; once the fault clears, it auto-recovers—reducing the need for manual reset visits during nuisance trips.
