Product Overview
Wireless Temperature Measurement Device Series refers to a family of products designed to monitor temperature at various points without the need for physical wiring between the sensor and the data collection or display unit. These systems are crucial for monitoring electrical equipment, industrial processes, and environmental conditions where traditional wired solutions are impractical, unsafe, or too costly.
Product Brief
Short-circuit Alarm Indication: The short-circuit sensor detects the line current during operation and sends an alarm signal when a short-circuit fault occurs on the line and meets the short-circuit judgment criteria.
Grounding Alarm Indication: The grounding sensor detects the zero-sequence current of the line during operation and sends an alarm signal when a grounding fault occurs on the line and the grounding fault current exceeds the set alarm current value.
Over-temperature Alarm Indication: The temperature sensor detects the temperature of the cable near the cable head during operation and transmits the data to the host via optical fiber in a very short time. When the cable temperature reaches or exceeds the set alarm temperature value, the host sends an alarm signal and closes the contact.
The 2-in-1 sensor for temperature and current display monitors the temperature and current of the monitoring point during operation, and transmits the data to the host via optical fiber at a certain frequency. After receiving the signal, the host displays the data on the LCD screen (Realize page-up and page-down to check the current and temperature of each phase via operation and key pressing). (Current display is an optional function.)
Two-remote Communication: After the indicator generates short-circuit and grounding alarm signals, it can output and transmit the fault status remotely via RS485 communication cable; in the fault-free state, the line load current and the temperature of the monitoring point are regularly reported to the upper computer via RS485 cable. (Optional function.)
Technical Parameters
| Item | Parameter |
|---|---|
| Short-circuit Alarm | 50~1000A (factory configurable), tolerance ±5%; factory setting: 600A |
| Short-circuit Overcurrent Response Time | 0.03~5S (factory configurable); factory setting: 0.2S |
| Grounding Alarm | 10~100A (factory configurable), tolerance ±10%; factory setting: 20A |
| Grounding Overcurrent Response Time | 0.03~5S (factory configurable); factory setting: 0.2S |
| Over-temperature Alarm | 20~80°C (field configurable), tolerance ±1°C; factory setting: 80°C |
| Auto-reset Time | 7S~48h (factory configurable); factory setting: 8h |
| Standby Current of the Whole Unit | ≤ 5μA |
| Indicator Protection Class | Host IP40; Sensor IP65 |
| Short-circuit & Grounding Protection Contact Capacity | 230V/AC-0.1A, 30V/DC-1A |
| Over-temperature Trip Contact Capacity | 230V/AC-0.1A, 30V/DC-1A |
| Over-temperature Alarm | Relay output for 3 cycles (2S per cycle, set 750mS, reset 1250mS) |
| Maximum Withstand Current of Short-circuit Current Sensor | 31.5kA/4S |
| Operating Environment | -25°C ~ +75°C; relative humidity: ≤ 95%; waterproof, acid-proof, salt-fog resistant |
| Application Scope | In systems with voltage level below 20kV |