Application Scenarios
In a regional water pumping station in northern China, the maintenance crew repeatedly struggled to pinpoint which phase had blown after a short-circuit event—the old fuses offered no clear visual signal, forcing a full three-phase replacement and a two-hour investigation each time. After upgrading to the 63NHG00B-690, the dual-indicator mechanism transformed their workflow: the red striker pin visibly pops out from the top of the fuse body when the element blows, and the front window changes color, allowing the operator to identify the exact faulted phase through the cabinet door window within seconds. When paired with an auxiliary micro-switch, the 63NHG00B-690 even fed a remote alarm into the SCADA system, alerting the control room before the patrol reached the MCC. This scenario illustrates how the 63NHG00B-690 solves one of the most persistent pain points in industrial power distribution: ambiguous fault localization that drains maintenance hours and extends unplanned downtime.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 63NHG00B-690 |
| Order Number | 3ABD0001782 |
| Manufacturer | ABB (Electrification / Low Voltage Products) |
| Product Category | NH Knife-Type Fuse-Link (Fuse) |
| Size | NH00 (Size 00) |
| Rated Current (Iₙ) | 63 A |
| Rated Voltage (Uₑ) | AC 690 V (compatible down to 400 V / 460 V networks) |
| Breaking Capacity | 120 kA (IEC 60269-2) |
| Utilization Category | gG (equipment protection) / gL (cable protection) |
| Indicator Type | Dual combination: mechanical striker pin + front-view color window |
| Dimensions (L×W×H) | Approx. 79 × 30 × 58 mm |
| Body Material | Ceramic square body with knife-type terminals |
| Standards Compliance | IEC 60269-1/-2, DIN 43620, VDE 0636-2 |
| Certifications | CE, RoHS |
| Weight | Approx. 0.216 kg |
| Operating Temperature | -25 °C to +55 °C (cabinet ambient) |
| Mounting | Plug-in to NH00 base / disconnect holder |
Technical Principles and Innovative Values
- Innovation Point 1: Dual-Combination Indication for Zero-Ambiguity Fault Reporting. Unlike conventional single-window fuses, the 63NHG00B-690 integrates both a top-mounted striker pin (which mechanically ejects upon element rupture) and a front color-changing window. This dual mechanism means the fault is visible both from the top of the fuse (for pull-out inspection) and from the front of the cabinet, dramatically reducing mean time to diagnose (MTTDiag). The striker is also compatible with add-on micro-switches (e.g., 170H0235 type) for remote SCADA alarming.
- Innovation Point 2: 120 kA Breaking Capacity for Transformer-Proximity Installations. The 63NHG00B-690 achieves 120 kA at 690 V AC per IEC 60269-2, meaning it can reliably interrupt the highest prospective short-circuit currents found near distribution transformers or large-capacity incomers. Where a standard molded-case circuit breaker might fail to clear the fault, the 63NHG00B-690 isolates the faulted segment in milliseconds, containing the let-through energy entirely within its ceramic body.
- Innovation Point 3: gG/gL Dual-Class Characteristics in One Element. The 63NHG00B-690 satisfies both gG (general-purpose, full-range protection for equipment) and gL (cable protection) utilization categories. It tolerates the inrush of motor starting currents (not blowing at 1.45× Iₙ for up to 1 hour) while still delivering fast, predictable clearing during true short-circuits. This dual-class behavior eliminates the need for separate backup protection devices.
- Innovation Point 4: Live Gripping Lugs for Safe Handling. The 63NHG00B-690 features insulated live gripping lugs on its body, allowing technicians to extract or insert the fuse-link safely using the dedicated NH extraction tool (e.g., FEH series) even in energized panels. Combined with an optional IP20 insulation protection kit (TD00-IP20), the 63NHG00B-690 meets the most stringent European safety requirements for live maintenance.
