1.Introduction

DF9011 Precision Transient Speed Meter, DEA, for Dongfang Steam TurbinesUtilizes microprocessor chips for signal processing, offering precise measurements and stable performance, with expandable features to meet user needs. The monitor features functions such as speed measurement, two-level alarms, overspeed protection, analog voltage and current output, sensor fault monitoring, alarm inquiry, and self-check. Suitable for the monitoring and protection of rotating machinery in power, textile, petroleum, and chemical industries.

2.Primary Functions

2.1Features speed measurement display, with a speed of up to 9999 RPM, and a 5-digit digital tube display.

2.2 Alarm Function: When the measured speed exceeds any alarm setpoint, the corresponding alarm indicator light on the front panel illuminates, and a switch signal is output on the rear panel to protect the monitored equipment.

2.3 Equipped with voltage and current output interfaces, which can be connected to computers and other devices.

2.4 Alarm values, teeth, and time can be set using the front panel buttons.

2.5 The system has the storage function for over-speed incidents for future inquiry.

2.6 Indicates sensor or input circuit failures.

2.7 Self-inspection function is available

3.DF9011 Precision Transient Speed Instrument, DEA, for Dongfang Turbine GeneratorTechnical Specifications

3.1Measurement Range: 1 to 9,999 rpm.

3.2 Accuracy: ±0.02% × n (where n is the reading of the indicator in r/min) ± 1 digit.

3.3 Input Signal: Sinusoidal or square wave pulse input, input voltage RMS 0.3-20V

Can be used with S-CZ magnetostrictive sensors or S-HC gear speed sensors.

3.4 Relay Output Contact Voltage/Current: AC 220V/3A, DC 28V/3A.

3.5 Output Interface: Output is proportional to the speed monitor's full-scale range (0-99999 rpm)

Current: 4-20mA, Load ≤ 500Ω

Voltage: 1-5VDC, Load ≥5KΩ

3.6 Work Environment: A. Temperature: 0～+60℃

B. Relative Humidity: ≤80%

C. No strong magnetic field interference nearby

D. No corrosive gases are present in the vicinity

3.7 Power Supply: AC 220V ±10% 50Hz ±5% Power Consumption ≤ 20W

3.8 Self-inspection Frequency: 2800 ± 100 Hz (Room Temperature)

3.9 Dimensions: 160×80×80mm

3.10 Hole: 154×76mm

RPM Display MonitorTechnical Specifications:
Sensor Inputs: Hall Effect Speed Sensor, Magnetostrictive Speed Sensor, Electro-Optical Speed Sensor, Frequency Range: 0.02～25kHz
2. Display: 4-digit digital tube, Accuracy: ±0.1%
3. Measuring Range: 0~9999 rpm
Current Output: 4-20mA or 0-10mA, Load ≤ 500Ω
Alarm contact capacity: AC220V/3A, DC28V/3A
6. Working Environment: Temperature: 0～55℃ Relative Humidity: ≤95%
7. Working Power: AC 220VAC±10% 50Hz Power Consumption ≤10W
8. Installation Method: Disk Type
9. Overall Dimensions: 160(W) x 80(H) x 225(L) mm.

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DF9011 Transient Speed Instrument, DEA, for Dongfang Turbine Generator