Product Description
Benshaw CBRCI2-N3-3R-HB NEMA Size 3 Prepackaged Full Voltage Starter with Circuit Breaker Disconnect, 50 HP
Rugged Durability for Heavy-Duty Industrial Applications
The Benshaw CBRCI2-N3-3R-HB is a heavy-duty, prepackaged NEMA Size 3 Combination Motor Starter designed for demanding three-phase motor applications. This non-reversing starter features an integrated Circuit Breaker Disconnect and is housed in a rugged NEMA 3R enclosure, making it suitable for both indoor and exposed outdoor installations.
Featuring a NEMA rated contactor and a separate Class 20 electronic overload relay, this cUL-certified starter delivers reliable motor control and protection for:
- 25 HP motors at 240V AC
- 50 HP motors at 480V AC
Key Features & Technical Specifications
| Specification | Detail |
|---|---|
| NEMA Size | Size 3 (Non-Reversing) |
| Enclosure Type | NEMA 3R / NEMA 12 (Indoor/Outdoor Rated) |
| Protection Type | Integrated Circuit Breaker Disconnect |
| Max HP Rating | 50 HP @ 480V AC (3-Phase) |
| Amperage Rating | 90 AMP (Contactor Rating) / 68 Amp (FLA Max) |
| Overload Protection | Electronic Class 20 Protection Relay |
| Control Voltage | 110/120V AC (with Fused Control Power Transformer) |
| Dimensions (H x W x D) | 24.00 in x 20.00 in x 10.00 in |
| Approx. Shipping Weight | 125 lbs |
| Auxiliary Contacts | 2 Side-Mounted (1 N.O. and 1 N.C.) |
Applications & Advantages
- Full Combination Starter: Includes the disconnect, contactor, and overload relay in one prepackaged unit, saving installation time.
- Heavy-Duty Durability: NEMA 3R/12 design ensures reliability in dusty, wet, high-vibration environments, perfect for factories, pumps, and outdoor HVAC units.
- Enhanced Motor Protection: Features a high-precision, separately mounted **Electronic Class 20 Overload Relay** for accurate and adjustable motor protection.
- Integrated Control: Includes door-mounted controls (Start/Stop pushbuttons, Overload Reset, Red Run Indicator) and an internal Fused Control Power Transformer (CPT) for the control circuit.
- Remote Ready: Two auxiliary contacts enable seamless integration with PLCs, remote stations, and other automation systems.
Frequently Asked Questions (FAQs)
- Q: What is the difference between NEMA Size 2 and Size 3 starters?
- A: NEMA Size 3 starters like the CBRCI2-N3-3R-HB handle larger motors (up to 50HP @ 480V) with a higher continuous current rating (90A vs 45A for Size 2), offering greater capacity and longevity.
- Q: Does this starter include a control power transformer (CPT)?
- A: Yes. The CBRCI2-N3-3R-HB includes a 480/240V:120V fused control power transformer. This provides reliable 120V AC power for the control circuit and door-mounted devices, simplifying wiring.
- Q: What does Class 20 overload protection mean?
- A: Class 20 means the electronic overload relay will guarantee a trip within 20 seconds when the motor draws 600% of its full-load current. This trip time is well-suited for high-inertia loads that require a slightly longer acceleration period.
- Q: Is this starter suitable for outdoor installation?
- A: Yes, the NEMA 3R enclosure provides robust protection against rain, sleet, and windblown dust, making it ideal for both harsh indoor and outdoor installations.
