ST420HF Series Combined Electrical Fire Monitoring Detector | Residual Current & Temperature Protection
ST420HF Series Combined Electrical Fire Monitoring Detector | Residual Current & Temperature Protection
This is a custom-made product. Please contact us to discuss your specifications and receive a quotation.
Description
The ST420HF is a combined electrical fire monitoring detector designed for TT and TN systems up to 690V, developed in accordance with Chinese national standards for electrical fire monitoring systems. It monitors residual current and temperature parameters in distribution circuits to detect and prevent electrical fire hazards before they occur.
Suitable for large shopping malls, residential complexes, industrial and mining enterprises, office buildings, hotels, and any location where electrical fire risk management is required.
System Overview
The ST series electrical fire monitoring system consists of:
- ST series monitoring equipment (e.g. ST2000FB / ST2000FB-H) — communicates with field detectors via RS485 bus, receives and forwards data, triggers alarms, and stores fault records
- ST series detectors (including ST420HF) — monitors residual current and temperature at distribution circuit level
Key Features
- RS485 bus communication between monitoring equipment and detectors
- Real-time monitoring and LCD display of residual current and temperature from all connected detectors
- Audible and visual alarm for residual current fault, over-temperature, power failure, and communication fault
- Data storage, query, and alarm control signal output
- Dual power supply with automatic main/backup switchover; LED status indicators on panel
- Self-diagnostic function on startup
- 8-channel relay output for controlling protected circuits or external devices
- Residual current protection + temperature protection in a single unit
- WiFi wireless data upload/download
- 2.8-inch color display
- Line protection function included
ST420HF Specifications
| Function | ST420HF |
|---|---|
| Residual current protection | ✓ Standard |
| Temperature protection | ✓ Standard |
| Residual current measurement | ✓ Standard |
| Temperature measurement | ✓ Standard |
| Alarm records | 16 records |
| Digital input (DI) | 8 channels |
| Relay output (DO) | 4 channels |
| Analog output (AO) | +1 or +2 channels (optional) |
| Residual current input | 1 channel |
| Temperature input (T) | 1 channel |
| Modbus-RTU | 1 channel + 1 channel |
| Line protection function | ✓ Standard |
| WiFi | ✓ Standard |
| Display | 2.8-inch color screen |
| Programmable functions | ✓ Standard |
Dimensions
- Main unit: 103 × 64.5 × 122.0 mm
- Panel cutout: 87.5 × 51.0 mm
Standards Compliance
- GB 14287.1 — Electrical Fire Monitoring Systems, Part 1: Monitoring Equipment
- GB 14287.2 — Part 2: Residual Current Electrical Fire Monitoring Detectors
- GB 14287.3 — Part 3: Temperature-Sensing Electrical Fire Monitoring Detectors
- GB 50016 — Code for Fire Protection Design of Buildings
- GB 50116 — Code for Design of Automatic Fire Alarm Systems
Care
To maintain the beauty and integrity of your purchase, we recommend treating it with care. Simple maintenance practices, such as gentle washing and proper storage, can effectively preserve the longevity of your favorites. We encourage you to refer to the care instructions included with each item, designed to help you keep your purchase in top condition.
Design
Our dedication to excellence extends beyond materials; it encompasses the artistry and craftsmanship illustrated in every piece we create.