The Arktite BHR and SRD series are explosionproof interlocked receptacles designed for hazardous areas, providing safe power to portable equipment like motor-generator sets, compressors, heating/cooling units, lighting systems, and conveyors. These units feature a built-in rotary switch that prevents plug engagement or disengagement under load, ensuring safety in environments with flammable vapors, gases, or combustible dusts.
Description
Key Features
- Certifications:
- BHR: Class I, Div. 1 & 2, Groups B, C, D; Class II, Div. 1 & 2, Groups F, G; Class III; NEMA 3R, 7BCD, 9FG.
- SRD: Class I, Div. 1 & 2, Groups C, D; Class II, Div. 1 & 2, Groups F, G; Class III; NEMA 3R, 7CD, 9FG (no Group B).
- Ratings: 30A, 60A, 100A; 600 VAC max, 250 VDC max.
- Interlock: Rotary switch operates automatically via plug insertion/removal; contacts engage before the switch closes and disengage after it opens, isolating arcing in a flame-tight chamber.
- Operation: Plug fastening ring unscrews for straight-pull disconnection; no external handle required.
- Materials: Copper-free aluminum housing, brass contacts.
- Plugs: Compatible with Arktite BHP (BHR) and SP (SRD) plugs, featuring pressure terminations.
- Wiring: Receptacles have flexible leads for splicing; large threaded cover provides access.
Applications
- BHR: Refineries, chemical plants with hydrogen (Group B) or equivalent hazards.
- SRD: Petroleum facilities, grain processing plants with flammable gases (Groups C, D) or dusts (Groups F, G).
Catalog Numbers and Specifications Table
Based on Eaton’s latest data (not from your EPC/EPCB document), here’s a table of common BHR and SRD configurations:
| Cat. # | Series | Amperage | Poles/Wires | Hub Size | Conduit Arrangement | Plug Compatibility | Certifications |
|---|---|---|---|---|---|---|---|
| BHR3323 | BHR | 30A | 2W, 3P | 1″ | Top feed | BHP3385 | Class I, B, C, D |
| BHR3423 | BHR | 30A | 3W, 4P | 1″ | Top feed | BHP3485 | Class I, B, C, D |
| BHR6323 | BHR | 60A | 2W, 3P | 1-1/4″ | Bottom feed | BHP6385 | Class I, B, C, D |
| BHR6423 | BHR | 60A | 3W, 4P | 1-1/4″ | Bottom feed | BHP6485 | Class I, B, C, D |
| BHR10323 | BHR | 100A | 3W, 4P | 1-1/2″ | Through feed | BHP10487 | Class I, B, C, D |
| SRD633 | SRD | 60A | 2W, 3P | 1-1/4″ | Vertical through feed | SP6385 | Class I, C, D |
| SRD643 | SRD | 60A | 3W, 4P | 1-1/4″ | Vertical through feed | SP6485 | Class I, C, D |
| SRD1033 | SRD | 100A | 2W, 3P | 1-1/4″ | Vertical through feed | SP10387 | Class I, C, D |
*Notes:
- Cat. # Breakdown: E.g., BHR3323 = 30A, 2W3P, Style 2, 1″ hub. SRD643 = 60A, 3W4P, 1-1/4″ hub.
- Hubs: BHR offers top, bottom, or through-feed (3/4″ to 2″); SRD uses fixed 1-1/4″ vertical through-feed back box.
- Plugs: BHP (brass contacts) for BHR; SP (with cable grip, neoprene bushing) for SRD.*
Back Boxes for BHR and SRD
- BHR: Does not use separate back boxes; conduit hubs (3/4″ to 2″) are integral to the assembly for top, bottom, or through-feed setups.
- SRD: Includes a factory-provided back box with 1-1/4″ vertical through-feed hubs. Optional separate back boxes (e.g., AJC108) can adapt to other conduit layouts.
| Back Box Cat. # | Amperage | Hub Size | Type | Material | Compatible Series |
|---|---|---|---|---|---|
| Integral (BHR) | 30A-100A | 3/4″-2″ | Top/Bottom/Through | Copper-free aluminum | BHR |
| SRD Back Box | 30A-100A | 1-1/4″ | Through-feed | Copper-free aluminum | SRD |
| AJC108 (Optional) | 60A-100A | 1-1/2″ | Through-feed | Cast aluminum | SRD (if modified) |
Comparison to EPC/EPCB
| Feature | BHR/SRD | EPC/EPCB |
|---|---|---|
| Hazard Rating | Explosionproof | Explosionproof |
| Groups | BHR: B, C, D; SRD: C, D | EPC: C, D; EPCB: B, C, D |
| Amperage | 30A, 60A, 100A | 30A, 60A, 100A, 200A |
| Switch/Breaker | Rotary switch | Thermal-magnetic breaker |
| NEMA Rating | 3R, 7BCD/7CD, 9FG | 3, 7CD/7BCD, 9FG, 12 |
