FS231-I over speed protection switch is suitable for drive chain measurement and over speed protection of pitch and yaw systems of wind turbines. By monitoring the pulses sent back by the speed sensor, and outputting the rotational speed with an isolated 4-20 mA current signal, when the frequency set by the panel is exceeded , the dry contact of FS231-I will act to give an alarm signal, so as to trigger the over speed protection of the wind turbine. 

FS231-I is designed according to the application scenarios of wind turbines, and has passed the relevant tests of the electromagnetic compatibility immunity standard GB/T17626 ( IEC61000-4 ), which is stable and reliable in long-term operation in wind farms. 

FS231-I directly sets the alarm frequency point, the average number of pulses, and the percentage of alarm hysteresis directly through the rotary switch, which is intuitive and fast, and does not require a computer connection for configuration software settings. 

FS231-I has a parameter protection function, when the parameter setting on the panel is changed, if the user does not confirm it, even if it is reset or power-off, will not apply the setting and indicate modification signal.

FS231-I Over Speed Protection Switch

▶  Ultra-thin appearance design, standard 35mm Rail card slot to save installation space.
▶  The alarm hysteresis frequency range can be set to 0 % ~ 99.9%.
▶  It has the function of parameter protection to prevent abnormal modification of parameters.
▶  LED shows the current operating status instantly.
▶  Combined plug-in terminals, easy to install and wiring.
▶  With watchdog function.
▶  Compatible with a variety of electromagnetic eddy current speed sensors.
▶  4~20mA current loop outputs the rotational speed.
▶ The power supply, dry contact, speed sensor and current loop are isolated at all ends.

Specifications

Supply Voltage
Supply Power
Measurement Error
Alarm Trigger Frequency
Alarm Hysteresis Percentage
Relay Contact Capacity
The Input Pulse Amplitude is Low
The Input Pulse Amplitude is High
Input Pulse Current (24V pulse)
Alarm Frequency FSET Setting Range
Alarm Cancellation Frequency
4~20 mA Current Loop Output Range
4~20 mA Current Loop Load Capacity
Each Circuit is Isolated and Withstand Voltage
Operating Temperature Range
Storage Temperature Range
Weight
Size

Parameters

20 ~ 28Vdc
2W
± 0.2%
FSET Hz
0% ~ 99.9%
30Vdc,2A
<5V
>15V
14.7 mA (Typical)
0.1 ~ 999Hz
FSET × Alarm Hysteresis Percentage Hz
0~FSET × 1.5
300Ω
1500 Vdc
-30°C to +70°C
-40°C to +75°C
150g
22.5mm × 75mm × 105mm