ST520F Series Combined Electrical Fire Monitoring Detector

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ST520F series combined electrical fire monitoring detector device is designed for TT and TN systems below 690V. By monitoring and managing the residual current and temperature electrical fire hazard parameters of the power distribution circuit, electrical fire can be prevented. It is an ideal choice for electrical fire prevention and monitoring in chemical enterprises. The device is composed of protection main body (including display), residual current transformer, temperature sensor and other p

1) Device Overview

ST520Fseries of combined electrical fire monitoring detector devices are designed690Vthe followingTT,TNsystem design, through the distribution circuit of the residual current and temperature of electrical fire hazard parameters to implement monitoring and management, so as to prevent the occurrence of electrical fires, is the ideal choice for chemical enterprise electrical fire prevention monitoring. The device is composed of protection main body (including display), residual current transformer, temperature sensor and other parts. The protection main body of the device is installed on the cabinet panel, and the other parts are installed in the cabinet.

2) Device Model

Note:

1) Standard1RoadModbus-RTUcommunication,3relay output andWiFifunction;

2) has1residual current measurement and4road temperature measurement function.

3) technical parameters

Analog Input Loop

Rated residual currentI△n

1A

frequencyF

50Hz

Measurement range and accuracy

Name

accuracy

residual currentI△

50 ~ 1000mA

≤± 1%

temperature

0 to 200°C

≤±°C

protection action accuracy

residual current

300 ~ 1000mA

≤1mA

temperature

45-140°C

≤1°C

protection delay time

0.1~ 60.0s

≤0.1s

Auxiliary power supply

power supply voltage (both AC and DC)

AC 85~264V,DC 90~300V

power consumption(is normal./protection)

≤3W / 5W

relay output (standard 3-way, one closed (DO1) and two open (DO2, DO3))

DO1,DO2,DO3

AC250V 5A,DC30V 5A

communication function

Modbus-RTUStatute

1channel, RS485 interface, terminal access

alarm function

Alarm mode

Sound and light alarm

Alarm Record

24alarm records

audio device

70~115dB

work environment

working temperature

-25~ +60 ℃

storage temperature

-25~ +70 ℃

relative humidity

5~ 95% (no condensation or ice inside)

altitude

<2500m

IPlevel

≥ IP20 (Panel ≥ IP40)

4) Contour Installation

Device body

dimensions are:103.0mm×64.5mm×95.9mm(length, width and depth), panel opening size:87.5mm×50.0mm(length and width).

Installation Method

device is to install the buckle fixing panel, install the four buckles along the grooves of the four corners of the device, and push them forward tightly, so that the front end is squeezed on the cabinet body, so that the device is installed.

5) Terminal Arrangement

6) Terminal Definition

7) Typical Wiring

4.5 ST570LFSeries Combined Electrical Fire Monitoring Detector

ST570LFseries combined electrical fire monitoring detectors, please refer to P21 "2.1.7 ST570LF series combined electrical fire monitoring detectors".

current transformer, see "2.3 current transformer" in this chapter"

4.6 ST420FSeries Combined Electrical Fire Monitoring Detector

ST420FSeries Combined Electrical Fire Monitoring Detector ".

4.7 ST420HFSeries Combined Electrical Fire Monitoring Detector

ST420HFseries combined electrical fire monitoring detectors, please refer to P44 "2.2.7 ST420HF series combined electrical fire monitoring detectors".

4.8 LZTResidual current transformer

residual current transformer is divided into LZT46, LZT80 and LZT120 three shell three models. When the residual current protection function is selected for the device, the residual current transformer shall be configured. The installation method is fixed with 2 screws, and the transformer is isolated from the drawer cabinet with epoxy board.

Residual Current Transformer Model and Specification Selection Table

Residual Current Transformer

4.9temperaturesensor

temperature sensor

During installation, the temperature probe should be installed close to the cable, busbar surface or cable joint. During installation, the nose joint can be tied with a nylon cable tie. In addition, according to customer requirements, the temperature probe can also be suspended or installed close to the cabinet to measure the environment or cabinet temperature.

temperature sensor is divided into 1m, 2m and 3m. The left end is installed close to the cable, bus bar surface or cable joint, and the right end is connected to the corresponding terminal of the device body.

Product Details

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