Description
Product Overview
1HSB495663‑2 is a high‑precision SF6 gas density relay manufactured by ABB, and this unit comes complete with a stainless‑steel rainproof cover. Furthermore, it serves for GIS, SF6 circuit breakers and gas‑insulated switchgears to supervise SF6 gas density continuously. In addition, it builds in automatic temperature compensation, so it can tell the difference between pressure shift caused by temperature change and real gas leakage. Therefore, the matching rain shield protects the gauge from rain, strong sunlight and dust when you install it at outdoor substations. Once SF6 leaks and density falls below the preset threshold, the relay sends out alarm and lock‑off signals. It safeguards the insulation and arc‑extinguishing performance of high‑voltage primary equipment.
Key Features
- Automatic temperature compensation: It removes pressure reading drift from ambient temperature and detects leakage accurately.
- Equipped with rainproof stainless‑steel cover: You can mount it directly on outdoor switch bays. The cover blocks rainwater, UV radiation and dust.
- Multi‑contact output: It provides separate alarm and lock contacts for protection and control circuits.
- Hermetic sealing design: It passes helium leak test and maintains stable performance for unattended substation operation.
- Local dial display: Field technicians can read SF6 density status directly from the gauge.
- Wide operating range: It works reliably from -40℃ to +60℃ for most outdoor power sites.
Technical Specifications
| Item | Specification |
|---|---|
| Model | 1HSB495663‑2 |
| Brand | ABB |
| Type | SF6 Gas Density Relay with Rainproof Cover |
| Measuring Range | 0.9MPa @ 20℃ reference |
| Accuracy Class | Class1.5 @ 20℃; Class2.5 from -40℃ to +60℃ |
| Contact Rating | AC/DC 250V, 1000VA / 500W |
| Operating Temperature | -40℃ ~ +60℃ |
| Storage Temperature | -40℃ ~ +85℃ |
| Humidity | 5‑95%RH, non‑condensing |
| Rain Cover Material | Stainless Steel |
| Medium | SF6 Sulfur Hexafluoride Gas |
| Compatible Equipment | SF6 Circuit Breaker, GIS, Gas Insulated Switchgear |
Applications
Power substations, high‑voltage distribution and grid upgrade projects. It supports SF6 circuit breakers, GIS combined electrical apparatus, ring main units and gas‑insulated transformers. Besides, it monitors and protects outdoor high‑voltage switchgear.
