Overview
ASD320 is designed for 3-35kV switchgear with standard wireless temperature monitoring (3 points, expandable to 12). It includes mimic diagram, HV live display, intelligent climate control (two heating, one fan), voice prompts, human body induction, trip/close supervision and voltage measurement, breaker counter, and RS485 Modbus. Ideal for applications needing continuous temperature tracking of critical connections.
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Integrated Wireless Temperature Monitoring
- 3 points standard (expandable)
- Range -50～+125℃, ±1℃ accuracy
- Sensor battery life ≥5 years
- Alarm on over-temperature
- Wireless frequency 470MHz
Comprehensive Status & Safety
- Dynamic mimic diagram with LEDs
- HV live display & phase check
- Voice error-prevention prompts
- Human body induction (auto backlight)
- Trip/close circuit supervision & voltage measurement
Intelligent Environment Control
- 1 temp/humidity sensor (4m cable)
- 2 heating + 1 fan outputs
- Forced heating mode
- Heating circuit fault alarm
- Adjustable thresholds
Reliable Power & Communication
- AC/DC wide-range power supply
- Low power consumption ≤8VA
- RS485 Modbus-RTU communication
- Power-off alarm output
- Industrial-grade reliability (MTBF ≥50,000h)
Function
| Function | Description |
| Mimic Diagram | Dynamic LED display showing breaker, disconnector (trolley), earthing switch, and spring status. |
| HV Live Display | Phase-by-phase LED indication for live voltage; supports external phase matching via test holes. |
| Electromagnetic Lock | One lock output, controlled by live voltage; unlocks when all phases dead. |
| Wireless Temperature Monitoring | 3 standard points (expandable to 12). Measures temperature from -50℃ to +125℃ with ±1℃ accuracy. Supports over-temperature alarm. |
| Temperature/Humidity Ctrl | One external sensor (4m cable); controls two heating outputs and one fan output based on user-set thresholds (adjustable via front panel or communication). |
| Heating Circuit Alarm | Detects open circuit or overload of heating loads and reports alarm. |
| Voice Error–Prevention | Voice prompts when unsafe operation is attempted (e.g., moving trolley with breaker closed). Two selectable modes. |
| Human Body Induction | Automatically turns on backlight and cabinet lighting when operator approaches. |
| Trip/Close Supervision | Monitors continuity of trip and close circuits; indicates circuit health via LEDs. |
| Trip/Close Voltage Meas. | Measures control voltage on trip and close circuits (accuracy class 1). |
| Breaker Operation Counter | Records number of breaker operations; can be reset via menu. |
| RS485 Communication | Modbus-RTU protocol, baud rate 2400-19200, for remote monitoring and parameter setting. |
| Power–off Alarm | Relay output closes upon auxiliary power loss. |
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Specification
| Parameter | Value |
| Auxiliary Power | AC 85～265V or DC 100～300V |
| Power Consumption | ≤8 VA |
| Communication | RS485, Modbus-RTU, 2400-19200 bps |
| Wireless Temperature Measurement | |
| – Number of Points | 3 standard (up to 12 optional) |
| – Measuring Range | -50℃ ～ +125℃ |
| – Accuracy | ±1℃ |
| – Sensor Battery Life | ≥5 years |
| – Starting Current | ≥5A |
| Temperature Measurement | ±1℃ |
| Humidity Measurement | ±3% RH |
| Trip/Close Voltage Accuracy | Class 1 |
| Digital Inputs | 8 opto-isolated (passive contacts) |
| Relay Outputs | Heating I, Heating II, Fan, Alarm, Lock, Lighting (depending on model) |
| Operating Temperature | -10℃ ～ +55℃ |
| Relative Humidity | ≤95% (no condensation) |
| MTBF | ≥50,000 hours |
| Dimensions (W×H×D) | 238 mm × 178 mm × 83 mm |
| Panel Cut–out | 220 mm × 165 mm |
| Mounting | Panel flush mounting |
| Weight | Approx. 1.2 kg |
| Front Panel Protection | IP40 |
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FAQ
ASD320 comes standard with 3 wireless temperature points, expandable up to 12 (P3, P6, P9, P12 options).
Sensors are powered by battery (ATE200) or CT-inductive (ATE400). Battery life ≥5 years at 25℃, CT-powered life ≥10 years.
No. ASD320 does not have power measurement. For electrical parameter measurement, please consider ASD300.
You can set it via the front panel menu (Parameter → Definite value) or via RS485 communication.
Optional. This function only works when the device is equipped with a switch that has pre-trip/pre-close contacts. Please confirm when ordering.
The range is 0～6553.5V (primary side value), accuracy class 1. It measures the secondary control voltage and displays the primary value after transformation.
Summary
ASD320 adds standard wireless temperature monitoring to essential safety and status functions. Early detection of overheating prevents failures. Voice prompts, auto-lighting, and trip/close supervision enhance safety. RS485 enables remote integration. It reduces unplanned downtime and extends equipment life.
