SWZQ-3A type fan monitoring alarm

1 Introduction

.1 SWZQ-3A型The fan monitoring alarm is located in the originalSWZQ-1A+On the basis of this, a high and low oil level detection function has been added, mainly used for real-time monitoring of the vibration speed, lubricating oil temperature, and lubricating oil level of the cooling tower fan during operation. When the vibration speed or lubricating oil temperature exceeds the given value, an audible and visual alarm will be triggered, and the power supply of the fan will be automatically cut off through the relay contact output to protect the fan; When the lubricating oil level is below the lower limit or above the upper limit, a corresponding flashing alarm will be triggered to remind the user to take measures.

1.2 The fan monitoring alarm widely adopts advanced technology and scientific research achievements in the design process, and has the following significant characteristics:

1.2.1The collection of vibration speed, oil temperature, and oil level parameters is completed by a combination probe, and the monitoring and processing are completed by a secondary instrument. Therefore, the installation is convenient, and the main control cabinet can leave more space for installing other instruments;

1.2.2Secondary instruments use microprocessors for data acquisition, processing, and output, resulting in higher reliability, stability, integration, and intelligence levels;

1.2.3Having standards4~20mACurrent output interface, which can be connected to centralized computers;

1.2.4The vibration sensor adopts advanced integrated circuit chips, with high accuracy, stable and reliable operation;

1.2.5The combination probe is installed on the observation window cover, which is the maximum point of fan vibration;

1.2.6The connection between primary and secondary instruments adopts a current interface, which can achieve a longer transmission distance, stronger anti-interference ability, and higher data reliability.

1.2.7The primary instrument adopts strict sealing technology and a secure installation method, greatly improving its working life under harsh conditions.

1.2.8Due to the use of hardware and software measures, most of the instantaneous large vibration values caused by unexpected factors (such as gusts) can be removed from the data array, greatly reducing the false alarm rate.

2 Main performance parameters

2.1 secondary instrument

2.1.1Model: SWZQ-3A

2.1.2Name Three parameter fan monitoring alarm

2.1.3 Installation form: Standard disc type;

2.1.4 opening size 150⁺¹×74⁺¹；

2.1.5 Alarm output form: Relay contact output and sound and light alarm;

2.1.6 Output relay contact capacity: 220/380Vac，3A；

2.1.7 Display mode: Vibration speed and oil temperature are displayed with three digits each;

Oil level: The over limit indicator light flashes;

2.1.8 Effective measurement range: Vibration speed:0~9.99mm/s；

Lubricating oil temperature:0~99.9℃；

Oil level: switch input

2.1.9 Sensitivity and accuracy: Vibration speed: ±0.01mm/s, accuracy5%；

Lubricating oil temperature: ±0.1℃, accuracy5%；

2.1.10Frequency response: 2~500Hz；

2.1.11Vibration measurement direction: Level;

2.1.12Interface form with peripherals: Temperature and vibration4~20mA DCCurrent output;

Sampling resistance ≤250Ω, line resistance ≤150Oh?

Oil level high/low switch interface

Maximum transmission distance: 1km；

2.1.131、 Secondary instrument connection method: Real time temperature4~20mA DCLine resistance ≤150Oh?

Instantaneous vibration12±8mA ACLine resistance ≤150Oh?

Oil level: normally open/Normally closed node

2.1.14Usage conditions:

2.1.14.1 Ambient temperature -10~70℃；

2.1.14.2 Relative humidity: not higher than85%；

2.1.15 Overall dimensions: 160×80×182

2.1.16 power supply 220Vac±10%，50~60Hz；

2.1.17 Maximum power consumption: 10W.

2.2 One time instrument

2.2.1Model: SWZT-3B/xxx

2.2.2Name Three parameter combination probe

2.2.3Installation method: observation windowM12Threaded installation

2.2.4Measuring range: Vibration speed:014.14mm/sInstantaneous value;

Maximum oil level: Distance from installation centerXXXmm

Zui low oil level: distance from installation center（XXX+30）mm

2.2.5Vibration measurement direction: Vertical to the installation plane;

2.2.6Frequency response: 10~150Hz

2.2.71、 Secondary instrument connection method: Real time temperature4~20mA DCLine resistance ≤150Oh?

Instantaneous vibration velocity12±8mA ACLine resistance ≤150Oh?

Oil level: switch quantity closed/disconnect

Maximum transmission distance:1km；

2.2.8Usage conditions:

2.2.8.1Ambient temperature -10100℃；

2.2.8.2Relative humidity: not higher than95%；

2.2.9power supply 9~15V DC

2.2.10 Primary instrument quality: 0.5kg