HZQW-03A Turbine Rotation Speed Bolt Monitor

Date:2021-2-24 15:13:00 Visits: Author:Dongfang YOYIK Engineering Co; Ltd,

China HZQW-03A Turbine Rotation Speed Bolt Monitor Manufacturer




Steam turbine rotation speed is a major monitoring content in operation, and the emergency governer is one of the main parts of the turbine safety system. When rotation speed of the turbine reaches 110% rated speed, the emergency governor bolt knocks out under the centrifugal force, so that the turbine can be shut down. It is necessary to test the bolt and inspect its trigger speed before a new unit is put into operation, or before the unit is grid-connected to the network after overhaul.


HZQW-03A Speed Bolt Monitor is designed for detecting this state. It is an intelligent digital display instrument of high performance microcomputer. The HZQW-03A monitor displays the rotation speed of the turbine. Its internal memory can store the rotation speed of the bolt knocking-out, retracting and maximum speed, which can be displayed on the instrument by pressing corresponding buttons.


The HZQW monitor is used with ZS series rotation speed sensors.





 HZQW-03A Turbine Rotation Speed Bolt Monitor




  1. Measuring Range: 0000 to 9999 RPM
  2. Accuracy: ≤ ±1 RPM
  3. Detectable Speed of Bolt: > 2570 RPM
  4. Contact Output Capacity: AC250V 5A or DC 27V 5A
  5. Power Supply: AC220V 15VA
  6. Mounting Hole Size: 152 x 76 mm



HZQW-03A ZS-02 L=100
HZQS-02A ZS-04 L=90
HZQS-02H ZS-04 L=80
HZQW-03E ZS-04 L=75
HZQW-O3E ZS-04 L=65
HZQW-03H ZS-04 L=100
HZQW-03E ZS-03 L=90
ZS-02 L=90 ZS-03 L=80
ZS-02 L=80 ZS-03 L=75
ZS-02 L=75 ZS-03 L=65
ZS-02 L=65 ZS-03 L=100



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