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AEG NW-BP85-002
Product Introduction:
The AEG NW-BP85-002 is a network-rated circuit breaker designed specifically for the protection of telecommunications, data networking, and IT equipment power distribution systems. The “85” denotes an 85 A rated current, and “002” is the variant/revision code. The NW prefix stands for “Network” series, indicating compliance with telecom-grade reliability standards.
Detailed content
Technical Specifications:
| Parameter | Value |
|---|---|
| Model | NW-BP85-002 |
| Rated Current (In) | 85 A |
| Pole Configuration | 1-Pole (1P) or 2-Pole (2P) — variant dependent |
| Rated Voltage (Ue) | 277/480 V AC (3-phase) / 120/240 V AC (single-phase) |
| Rated Frequency | 50/60 Hz |
| Rated Short-Circuit Breaking Capacity (Icu) | 10 kA at 480 V AC |
| Trip Curve | Type C (5–10 × In) or Type B (3–5 × In) — variant dependent |
| Standards Compliance | UL 489, IEC 60947-2, Telcordia GR-1089-CORE (network equipment) |
| Degree of Protection | IP20 (front), IP54 (with optional cover) |
| Ambient Temperature | -40°C to +70°C |
| Mounting | DIN 35 mm rail or bolt-on |
| Mechanical Endurance | 20,000 operations |
| Electrical Endurance | 10,000 operations at rated load |
Material Composition:
- Housing: Glass-fibre reinforced polycarbonate (UL94 V-0)
- Terminals: Copper alloy with tin plating, rated for aluminium conductors
- Contacts: Silver-tin oxide (AgSnO2) for high reliability
- Arc Chute: Stainless steel de-ion plates
- Trip Mechanism: Electronic microprocessor-based (network-grade)
- Indicator LED: Front-mounted green/red status LED
Structural Features:
- Compact 1-module width (17.5 mm) per pole
- Front-mounted LED status indicator (green = OK, red = tripped)
- Auxiliary contact (1 NO + 1 NC) for remote alarm signalling
- Shunt trip coil compatible (24–480 V AC/DC) for remote disconnection
- Alarm contact for SNMP/BMS integration
- DIN rail clip with secure latch mechanism
Working Principle:
The network circuit breaker uses a microprocessor-based electronic trip unit that continuously monitors current via a precision current transformer. The trip unit compares the measured current against programmable thresholds. For overloads, it applies an I²t thermal model with inverse-time characteristic. For short circuits, it trips instantaneously when current exceeds the magnetic threshold. The electronic trip unit also provides ground fault protection (GFP) and alarm-only thresholds for predictive maintenance. The auxiliary and alarm contacts provide status feedback to network management systems (NMS) or building management systems (BMS).
Functional Features:
- Adjustable trip setting: 0.4–1.0 × In (40–85 A)
- Ground fault protection (GFP): 30 mA to 1 A adjustable
- Alarm contact: Activates at 80% of trip setting for early warning
- Shunt trip: Remote emergency disconnection
- Front-panel LED: Visual status indication
- Communication-ready: Compatible with SNMP-enabled power monitoring
Performance Parameters:
| Parameter | Value |
|---|---|
| Icu (Breaking Capacity) | 10,000 A (10 kA) at 480 V AC |
| Ics (Service Capacity) | 7,500 A (75% of Icu) |
| Trip Accuracy (Overload) | ±10% at 1.0 × In |
| Trip Time (Short-Circuit) | < 25 ms at 10 × In |
| Dielectric Strength | 2.5 kV AC / 1 minute |
| Impulse Withstand | 6 kV |
Advantages & Highlights:
- Telcordia GR-1089 compliant — meets telecom-grade reliability requirements
- Electronic trip unit provides superior accuracy over thermal-magnetic breakers
- Alarm contact enables predictive maintenance before trips occur
- Compact 1-module design maximizes panel density
- Shunt trip + alarm for full remote management capability
Applicable Industries:
- Data centres
- Telecommunications exchanges
- Server room power distribution
- Network operations centres (NOC)
- Hospital IT infrastructure
- Financial trading floors
Installation Requirements:
- Mount on DIN 35 mm rail (EN 60715)
- Connect conductors to screw terminals (top/bottom entry, 1–95 mm²)
- Torque terminals to 8 Nm (copper) / 6 Nm (aluminium)
- Connect alarm and shunt trip wires to auxiliary terminals
- Verify ground fault setting before energizing
Usage Precautions:
- Do not use in locations exceeding +70°C ambient temperature
- Test ground fault protection monthly per Telcordia requirements
- Do not bypass the alarm contact in critical infrastructure
- Replace only with identical part number — variant “002” has specific firmware
- Log all trip events for maintenance records
