The Allen‑Bradley 193-EF1A safeguards motors against overloads and phase loss. This device mounts directly on Bulletin 193 IEC contactors. It uses solid-state sensing technology for precise current measurement. You will find this relay in motor control centers across many industries.
Technical Specifications Overview
This electronic overload relay covers a current range from 0.9 to 6.5 A. The Allen‑Bradley 193-EF1A provides a Class 10 trip curve as standard. A built-in ambient temperature compensation feature prevents nuisance tripping. Furthermore, the device includes a differential mechanism for phase loss detection. This design ensures reliable motor protection even under harsh conditions.
| Parameter | Specification |
|---|---|
| Model | 193-EF1A |
| Current Range | 0.9 – 6.5 A (adjustable) |
| Trip Class | 10 (standard) |
| Voltage Rating | 600 V AC maximum |
| Frequency | 50/60 Hz |
| Phase Loss Sensitivity | ≤3.5 A differential |
| Reset Method | Manual or automatic (selectable) |
| Electrical Life | 100,000 operations |
| Dimensions (H x W x D) | 87 x 45 x 78 mm |
| Weight | 0.21 kg |
| Terminal Wire Size | 0.5 – 2.5 mm² (20–14 AWG) |
| Operating Temperature | -20°C to +60°C |
Internal Components and Energy Storage
The Allen‑Bradley 193-EF1A contains one main PCBA with 42 discrete parts. Key components include three current transformers for phase sensing. The relay also holds a small capacitor storing 47 µF of energy. This capacitor maintains trip settings during short power dips. Additionally, a bi-metallic simulation circuit replaces traditional heater elements.
Physical Interfaces and Mounting
You will find three input terminals on the top of this relay. Three output terminals connect directly to the contactor coil. A rotary dial lets you adjust the full-load current setting easily. The front panel includes a red trip indicator and a blue reset button. Two clips secure the Allen‑Bradley 193-EF1A onto a DIN rail or contactor.
Installation and Operational Reliability
Install this motor protection relay inside a clean control enclosure. Maintain a 25 mm gap around the device for cooling airflow. The relay performs a self-test every time you power it up. Therefore, you gain confidence in its protection capabilities immediately. This unit serves continuous-duty motors running 24/7 in factories.
Details
| Weight | 1.1 kg |
|---|---|
| Dimensions | 160 × 90 × 87 mm |
Reviews
There are no reviews yet.