Product Overview

The ABB 63NHG00B-690​ (order code 3ABD0001782) is a size NH00 low-voltage NH fuse link rated 63 A at 690 V AC, delivering a 120 kA breaking capacity under IEC 60269-1 / IEC 60269-2-1 and DIN 43620. It belongs to ABB’s NH system of square-body, knife-blade-contact fuses that dominate European-style industrial distribution — MCC line-ups, transformer secondary feeders, generator outlet cubicles, UPS input/output panels, and equipment-level protection on drives, welders, and process skids. The “gG/gL” utilization category marks it as a full-range general-application fuse: gG covers equipment protection (motors, transformers, rectifiers) and gL covers cable/line protection, meaning a single 63NHG00B-690​ can protect both the feeder cable and the downstream device in one element — no separate cable-only + equipment-only pair needed.What sets the 63NHG00B-690​ apart from a plain NH00 blank is the combination dual indicator​ (ABB calls it “combination fuse status indicator”). When the fuse clears, two things happen simultaneously: a top-mounted mechanical striker pin​ pops upward (the “striker” or impact pin), and a front-view color-change window​ shifts from clear/neutral to a high-visibility fault color (typically red-orange). This dual-path indication means a maintenance tech can spot the blown fuse from the front of the cubicle (window) andan auxiliary micro-switch clipped onto the striker pin (e.g., ABB 170H0235 class) can send a remote “fuse blown” alarm to the PLC or annunciator panel. The 63NHG00B-690​ body is ceramic (arc-quenching, high thermal endurance) with silver-plated copper knife-blade contacts at both ends and a live gripping lug​ on the top carrier — that lug lets the tech grab the live fuse with a standard NH fuse-handler (FEH- series) afterthe base has been opened, without touching the blades; it’s a small but decisive safety detail on 690 V systems where “it’s de-energized, right?” is never a safe assumption.At ~79 mm (L) × 58 mm (H) × 30 mm (W) and ~0.22 kg, the 63NHG00B-690​ seats into any standard NH00 base (DIN 43620 footprint) — BH00DIN or ABB’s own NH00 base family — and the knife blades engage the spring-bolt terminals without tools beyond the handler. The 45–62 Hz frequency rating covers both 50 Hz (EU/UK/Asia) and 60 Hz (NA/offshore) mains. For plants standardized on ABB NH distribution, the 63NHG00B-690​ is the 63 A / 690 V workhorse: one step up from the 50 A (50NHG00B-690) for lightly loaded MCC branches, one step below the 100 A (100NHG00B-690) for heavier feeders. It’s also the “sweet spot” for photovoltaic AC combiner/transformer secondary in C&I solar where 690 V AC is the inverter-export voltage in Europe — gG/gL holds for the cable home-run, and the 120 kA breaking capacity covers the prospective fault on a stiff utility tie-in.

Technical Specifications

Main Features and Advantages

Ceramic body with 120 kA / 690 V breaking capacity.​ The 63NHG00B-690​ is built for stiff-fault systems — transformer secondaries, utility tie-ins, generator outlets — where the prospective short-circuit current can hit triple digits. The ceramic envelope quenches the arc internally without venting to the cubicle; the silver-plated knife blades carry 63 A continuously at 690 V with minimal I²R rise, and the 120 kA interrupt rating means the fuse clears before the busbars see permanent stress. For gG/gL duty, the 63NHG00B-690​ is calibrated to melt on overload (1.25×In upward, following the gG time-current characteristic) and clear instantaneously on heavy short-circuit — one element doing both jobs.Combination dual indicator: top striker + front window.​ The signature “Dual Indicator” on the 63NHG00B-690​ is a fused-pyrotechnic striker: when the element melts, a spring-loaded pin fires upward ~8–10 mm through the top of the carrier, and simultaneously the front lens (viewed through the NH00 base’s observation cut-out) shifts color. This gives two audiences what they need: the panel-front tech​ sees the window without opening the cubicle door (if the base has a sight glass); the remote alarm system​ gets a signal if a micro-switch (ABB 170H0235 class, clipped onto the striker lane) is mounted — the striker pop closes the switch contact, which can drive a PLC DI or an annunciator “Fuse Blown — Feeder 4” lamp. For plants running predictive maintenance on distribution, adding the micro-switch to every 63NHG00B-690​ in the MCC turns a “walk-the-row-on-Friday” ritual into a real-time alarm.Live gripping lug + NH00 DIN 43620 footprint.​ The top carrier of the 63NHG00B-690​ carries a formed metal lug — the “live gripping lug” — sized to mate with the hooked nose of an NH fuse extraction handle (ABB FEH- series). After the NH00 base’s isolating switch is opened and the blades are no-load, the tech hooks the handler onto the lug, rotates, and the 63NHG00B-690​ lifts straight out — no finger-near-blade, no “did I touch the bus?” moment. The NH00 footprint (DIN 43620) means the 63NHG00B-690​ drops into any NH00 base from ABB, Siemens, Eaton Bussmann, or generic DIN-compliant OEM — the knife-blade length and spacing are standardized, so spares interchange at the footprint level (though ABB recommends ABB-on-ABB for warranty).gG/gL dual-role saves BOM lines.​ In a traditional distribution design, you might specify a cable-protect-only fuse (gL) plusan equipment-protect-only fuse (gG) in series or as separate feeders. The 63NHG00B-690​ is gG/gL dual-classified, meaning the TCC (time-current characteristic) satisfies both cable thermal withstand (gL) and equipment short-circuit withstand (gG). For a 63 A MCC feeder to a 30 kW motor drive + 35 mm² Cu cable, one 63NHG00B-690​ covers the cable (gL: doesn’t let the cable cook on a 200 A fault) and the drive input (gG: clears before the drive’s diode bridge avalanches). One SKU, one spare on the shelf, one TCC to plot.Remote-signaling ready.​ The striker pin on the 63NHG00B-690​ is mechanically compatible with ABB’s NH micro-switch adapters (170H0235 family — SDL-2 style). Clip the adapter onto the NH00 base’s striker lane, and every time a 63NHG00B-690​ blows, the striker pops into the micro-switch lever, closing a 24 V DC / 230 V AC contact. Wire that contact to a PLC DI or a panel-mounted “Fuse Alarm” lamp, and the MCC room gets remote visibility. For unmanned pump stations or rooftop PV inverters, this is the difference between “we found out Monday the feeder blew Friday” and “SCADA ticket fired Saturday morning.”