REFLECTED WAVE TRAP - A Quantum Leap in Motor Protection

The Problem: Over-Voltage Spikes @ Motor Terminals (Reflected Waves) Failure Threshold (>1000 Volts) M Drive Reflected wave at motor terminals Significant motor failures (insulation failure) caused by reflective wave spikes High dV/dt on PWM pulse creates over-voltage spikes at motor terminals. Occurs with cable lengths >50 feet (between drives and motor). Per NEMA MGI Part 30 and VDE 530, motors rated for 600V or less withstand a peak voltage of only 1000V. Existing solutions (A-B Terminator, TCI series filters) have performance limitations.

The Solution: Reflected Wave Trap (RWT) Without RWT With RWT Patented RWT installed at motor terminals: prevent motor damage/failures

Benefits of the Cutler-Hammer RWT 1. One Size Fits All! Only one model required for 208 to 480 Volt applications any H.P. motor any drive/motor manufacturer 2. Two Enclosure Styles NEMA 1 NEMA 4X; Class I, Div 2 for hazardous environments

Benefits of the Cutler-Hammer RWT (continued) 3. Superior Clamping 480 Volt Application Without RWT With RWT

4. Status Indicator Light Benefits of the Cutler-Hammer RWT (continued) 4. Status Indicator Light Not available with competitor models Status indicator turns “OFF” if unit fails 5. Cost Effective, Easy to Install Easy installation for retrofit and new systems Mount within 25 feet of motor Lower energy losses

6. The “Coolest” Solution Benefits of the Cutler-Hammer RWT (continued) 6. The “Coolest” Solution A-B normal operating temperature: 125 - 220°C (safety hazard, limits cable length, higher power losses) C-H Reflected Wave Trap normal operating temperature: < 60°C for NEMA1; <90°C for NEMA 4X Surface Temperature (degree’s Celsius) A-B @216°C C-H @ 90°C

Benefits of the Cutler-Hammer RWT (continued) 7. Longer Cable Lengths, Faster Carrier Freq. Higher carrier frequency:operates up to 12 kHz (compared to 2 to 6 kHz for competitor design) Flexibility of operation: enables longer cable lengths between drive and motor Eliminates cable degradation due to over voltage

Why RWT Technology? The RWT is patented by Cutler-Hammer

Overview of Reflected Wave Solutions

Additional Information on RWT & Drive Applications RWT brochure (B.037F.01.S.E) Specification Guide (TD.37F.02.T.E) Commercial Article on RWT (AP.037F.01.T.E.) Installation & Operating Guide (TD-37F.01.T.E) Industry Articles (contact Surge Protection product line - attn Satendra Prasad) Application assistance: Cutler-Hammer Drive Sales Managers Stock/Price: Vista registered (stocked in Spartensburg)

Industrial Surge Protection Example