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UR-SHA | GE Multilin | Power Supply Module
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- Part Number: URSHA
- Brand: General Electric
- Type: Power Supply Module
- Dimensions: 8.2x12.2x6cm
- Country of Origin: USA
- Barcode: 8537101190
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Product Description
GE Multilin UR SHA Power Supply Module
The GE Multilin UR SHA is a third‑generation high‑voltage power supply module for Universal Relay (UR) systems. It replaces the earlier UR‑1H and UR‑RH modules, delivering higher output power, improved thermal performance, and enhanced isolation ratings. As part of the UR modular architecture, the UR‑SHA installs behind the relay’s hinged faceplate and provides regulated power to both the relay chassis and its dry‑contact input circuits.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | UR‑SHA |
| Manufacturer | GE Multilin |
| Origin | Markham, Ontario, Canada |
| Weight | approx. 2 lb 2 oz |
| Dimensions | 6.5 in × 6.5 in × 1.75 in |
| Voltage Range | 125–250 V DC (nominal) • 100–240 V AC (50/60 Hz) |
| Output Power | 45 W (increased from 35 W in earlier generations) |
| Dry Contact Input Power | 48 V DC |
| Isolation Voltage | 2300 V AC |
| Environmental Option | “A” = Horizontal 19‑inch rack, harsh‑environment coating |
| Software Support | EnerVista UR |
Functional Description
The UR‑SHA is one of the most advanced power‑supply modules in the UR family. It provides:
- High‑voltage AC/DC input capability
- Regulated power for relay electronics
- 48 V DC supply for dry‑contact inputs
- Improved efficiency and reduced heat generation
- Enhanced isolation and over‑temperature protection
The module is designed to operate reliably in demanding industrial and utility environments. Its built‑in protection features include:
- Over‑temperature shutdown at 105°C
- Improved thermal efficiency (28% better than earlier models)
- Higher isolation rating (2300 V AC)
UR relays continuously monitor the health of the UR‑SHA using internal diagnostics. Any detected fault triggers:
- Relay self‑test alarms
- LED indications on the faceplate
- Preventive maintenance notifications
Generational Improvements
The UR‑SHA belongs to the UR‑SH generation, replacing earlier modules:
| Feature | UR‑1H (Gen 1) | UR‑RH (Gen 2) | UR‑SHA (Gen 3) |
|---|---|---|---|
| Output Power | 35 W | 35 W | 45 W |
| Isolation Voltage | 2000 V AC | 2000 V AC | 2300 V AC |
| Heat Efficiency | Standard | Standard | 28% improved |
| Over‑Temp Protection | No | No | Yes (105°C shutdown) |
| Capacitor Count | 27 electrolytic | 27 electrolytic | 1 electrolytic (high‑reliability design) |
| Input Voltage Range (DC) | 88–300 V | 88–300 V | 88–400 V |
Meaning of the “A” Suffix
In UR‑SHA, the suffix A indicates:
- Horizontal 19‑inch rack format
- Harsh‑environment protective coating
If the suffix were B, it would indicate:
- Vertical ¾‑size rack format
- Harsh‑environment coating
Frequently Asked Questions
Q: How is the UR‑SHA different from earlier UR power supplies? A: It provides higher output power (45 W), better efficiency, improved isolation, and over‑temperature protection.
Q: What does the “A” in UR‑SHA mean? A: It specifies a horizontal 19‑inch rack version with harsh‑environment coating.
Q: What voltage does the UR‑SHA supply to dry‑contact inputs? A: It provides 48 V DC for dry‑contact input circuits.
Field Installation Guidelines
- Remove all control power before replacing the module.
- Use ESD protection when handling modules.
- Ensure the replacement module matches the relay’s order code (horizontal vs. vertical).
- Verify connectors are fully seated before re‑energizing the relay.
- Avoid mixing generations unless necessary; matching modules ensure consistent rail‑monitoring behavior.
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