Lightning detector of a windmill Type1

LDW-RC series

Accurate detection of lightning strikes on wind turbines to support safe operation of wind power generation facilities.

Specification（PDF ）

Features

1. Realizing the efficient maintenance by detecting lightning strikes on wind turbines.: A Rogowski coil is used for the current sensor to accurately detect lightning strikes on the wind turbine tower and output of an alarm (contact). In addition, the time of lightning strike, current polarity, peak current value, charge amount value, specific energy and current waveform data are recorded on the SD memory card.; *Please inquire separately about remote data collection.
2. Complied with JIS C 1400-24.: This product is complied with Lightning protection standards (JIS C 1400-24) Lightning detector of a mindmill class 1.
3. Automatic stop at the time of lightning strike is also possible.: By linking the alarm (contact) with the control device of the wind turbine, it is possible to stop the wind turbine when lightning strikes.
4. The main body is small and easy to install.: It can be magnetically attached to the inside of a steel tower.
5. It can be customized to meet customer requirements.

Necessity of lightning wind detector of a windmill

A ministerial ordinance (Ministry of International Trade and Industry Ordinance No. 53 in 1997) was enacted to establish technical standards for wind power generation facilities, and the Ministry of Economy, Trade and Industry enforced the interpretation of technical standards for wind power generation facilities (revised 20170323 Commercial Bureau No. 3).
This product can also be applied as a "measure to protect wind turbines from lightning strikes".

Type

LDW-RC series

Specification

Type		LDW-RC□-1	LDW-RC□-2
Sensor type		Rogowski coil
Power source		AC90V～240V（50/60Hz）、DC12V ※When supplying both AC90～240V and DC12V, it can be operated by AC90～240V
Power consumption		Less than 10W
Current detection frequency bandwidth		0.1Hz to 100kHz within±3dB
Minimum detectable current value		±1kA	±2kA
Maximum measurable current value		±100kA Accuracy : Within 100kA ±10%	±200kA Accuracy : Within 200kA±10%
Maximum measurable electric charge value		1200C
Observation period		Approx. 0.6s
Time		RTC
Alarm	Setting range	Peak current : 1 to 10kA(per 1kA)	Peak current: 2 to 10kA(per 1kA)
Alarm	Output	Changeover contact without voltage can be output for one second when detecting lightning strike intensity more than alarm.
Record	Media	SD memory card（2GB）
	The number of records	Max 999
	Record contents	Record number / Detecting time / Polarity/ Peak current / Electric charge
Display		Record number / Detecting time / Polarity / Peak current / Electric charge / Specific energy / Alarm output
Environmental condition		Main unit：Indoor Rogowski coil：Outdoor
Operating temperature	Rogowski coil	－30℃ to＋60℃
Operating temperature	Main unit	Measurement and record : －20℃ to ＋60℃
Mass		Main unit：about 4 kg Rogowski coil：less than 10 kg（In case of wind tower at 4.3m）

Purpose

Class I compliant lightning detector that accurately detects lightning strikes (direct lightning strikes) to wind turbines and outputs an external contact.