Schneider STBNIP2212

1. Product Overview

The Schneider STBNIP2212 is a 22kW braking resistor specifically designed for Altivar Process variable frequency drives, serving as a critical component in medium-high power motor drive systems. It safely dissipates regenerative energy generated during motor braking, preventing DC bus overvoltage and ensuring system stability.

Featuring a fully enclosed forced-air cooling design with IP21 protection rating, the resistor incorporates a temperature protection switch (NC contact, operates at 150°C±10%). The resistance element uses premium nickel-chromium alloy for high-temperature resistance, oxidation prevention, and extended lifespan. The standard package includes mounting brackets and connection cables for quick integration with Altivar Process drives.

2. Key Features

(1) Electrical Specifications

• Rated power: 22kW (continuous)

• Peak power: 44kW (intermittent)

• Resistance: 12Ω (±10%)

• Rated current: 42.9A

• Insulation voltage: 1000V AC

• Dielectric test: 3000V AC/1min

(2) Mechanical Design

• Fully enclosed metal housing with cooling fan

• Protection class: IP21 (solid objects/vertical dripping water)

• Mounting: Wall-mounted (brackets included)

• Cooling: Forced air (dual ball-bearing fan)

• Terminals: Screw type (max 35mm² cable)

(3) Safety Protections

• Built-in thermal switch (150°C±10%)

• Over-temperature cutoff

• Fan operation monitoring

• Resistor overload protection

(4) Environmental Compliance

• Operating temp: -25°C to +60°C

• Storage temp: -40°C to +85°C

• Humidity: <95% (non-condensing)

• Altitude: ≤1000m (derating above)

• Vibration: 5-500Hz/2G

• Shock: 15G/11ms

3. Typical Applications

(1) Heavy-duty Braking

• Crane/lifter load descending

• Mine hoist deceleration

• Port crane positioning

(2) Inertia Load Systems

• Centrifuge fast stop

• Large fan coasting

• Paper machine tension control

(3) Frequent Start-Stop Equipment

• Elevator regeneration

• Production line positioning

• Machine tool spindle braking

(4) Regenerative Energy Handling

• Oilfield pumpjack braking

• Conveyor emergency stop

• Test bench energy dissipation

4. Why Choose Schneider STBNIP2212?

(1) Optimized Compatibility

Precisely matched with Altivar Process drives for impedance and thermal performance, avoiding under/over utilization issues.

(2) Enhanced Cooling

Patented airflow design improves heat dissipation by 30% versus standard resistors. Dual ball-bearing fan ensures 50,000-hour lifespan.

(3) Comprehensive Protection

Triple safeguards (thermal switch + overload + fan monitoring) reduce failure risks, with proven MTBF >80,000 hours.

(4) Easy Installation

Pre-assembled brackets and standard cables save 50% installation time. Modular design enables fast replacement (MTTR <30min).

(5) Ecosystem Integration

Seamless interoperability with Altivar Process drives enables direct resistor status monitoring via drive interface.

(6) Global Certifications

UL/cUL, CE, RoHS compliant per IEC 61800-5-1, suitable for worldwide deployments.