Product Info

Surge counter

 
Surge counter  

When lightning current enters an earth wire, etc., this device can detect the current with a CT, and count the surge.

 
 
 

Surge counter SC301 type

 

Surge counter SC301 type

 

When lightning strikes a communications tower or similar, this device can detect the lightning current and count when the current exceeds a given level. Both the outdoor detection unit and indoor receiving unit are insulated with fiber optic cable. The indoor receiver can send accumulated data to a PC, and can be programmed to issue an alarm when a count is made.

 
 

Device outline

 
Model Use
R-0

A sensor is fitted to a lightning conductor or tower strut and measures lightning surge current. When lightning surge current flows into the conductor, the sensor detects this and records and stores the time and current peak value into the internal memory (max. 200 records) of the outdoor detection unit. The stored data can be displayed on an LCD with a simple button operation and sent to a PC along an RS232C interface. The outdoor detection unit is battery powered and is, therefore, unaffected by external power supplies.

R-3

The basic functions of this model are the same as those of R-0. R-3’s outdoor detection unit is equipped with an optical signal output so that, when lightning is detected, a signal can be sent to the indoor relay unit via a fiber optic cable. The indoor relay unit is equipped with an A contact output terminal, which operates for only about 15 seconds when lightning is detected. f the customer has an alarm network, this contact can be used to carry out lightning detection remotely.

 
 

System configuration

 
System R-0 R-3
Sensor Sensor type

Divided type CT, Rogowski Coil

Sensor inner diameter Select from split type CT: φ125, or Rogowski coil: φ300 *1

Main unit (outdoor detection unit)

Measurement current range 0.5kA to 40kA (standard) *2
Frequency bandwidth 1kHz to 500kHz
Measurement accuracy Accuracy ±10% or less (up to 2.0kA, ±0.2[kA])
A/D resolution 10 bit
Trigger level +side 0.5kA, −side 0.5kA
Trigger time interval Approx.. 1sec
Recorded data No. of records, date and time, current peak, polarity
Record data q’ty 200 records
Data display Recorded data can be displayed on device LCD.
Time accuracy

Internal clock accuracy: ±120 sec. per month

With GPS clock (optional): ±30 sec. per month

Power supply

One 3.6V lithium battery

With GPS clock (optional), two batteries.

Battery life Approx. 2 years (may be shorter, depending upon operation frequency)
Water proofing IP3 equivalent (rainproof type)
Guaranteed operating range Temp.: −10℃ to +50℃, Humidity: 85% or lower (no condensation)
Relay control unit power supply: - DC24V, DC48V (standard) *3
Fiber optic cable length - Within 50m *3
 
*1: The inner diameter of the Rogowsky coil can be changed according to the installation conditions (please enquire when ordering).
*2: The current detection range can be changed (please enquire when ordering).
*3 This can be changed according to the installation conditions (please enquire when ordering).
 

SCAR11X type surge counter

 

SCAR11X type surge counter

 

This device counts surge current than flows into SPD earth circuits in excess of 10/200μs, 10A.

【Dimensions】 W65×H35×D108.5 (excl. feed-through terminal protrusion)
CT feed-through hole φ8

 
 

Main performance features

 
Item Performance
Detection method current detection by current transformer (CT)
Detection current value Impulse 10/200μs, 10A or more
Display Count displayed by electronic counter
Power supply Electronic counter uses lithium batteries
(battery life 5 years)
 
 

SCAR11Y type surge counter

 

SCAR11Y type surge counter

 

This device counts surge current than flows into SPD earth circuits in excess of 10/200μs, 10A.

【Dimensions】 W95×D172×H60 (excl. feed-through protrusion)
CT feed-through hole φ8

 
 

Main performance features

 
Item Performance
Detection method Current detection by current transformer (CT)
Detection current value Impulse 10/200μs, 10A or more
Display Count displayed by electronic counter
Contact output 1 make 70ms
Counter operation confirmation mechanism Confirmation switch and LED
Power supply Electronic counter uses lithium batteries
(battery life depends on operating conditions)
AA battery for display output
 
 

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