SC250 Surge Counter
- Minimum discharge 8/20µs current counted250A
- Maximum discharge 8/20µs current counted100kA
- Minimum impulse 10/350µs discharge current counted250A
- Maximum impulse 10/350µs discharge current counted
The counter display can be mounted top, bottom, back, or strapped up to 20 m from the measurement point. The device complies to the IEC 62561. Thanks to its IP67, housing, rugged materials and self power, the LSC is suitable for outdoor and hazardous atmospheres.
Key features
- High measurement performance: from 250A minimum to 100kA detection
- Outdoor device : IP67
- No maintenance : self powered device, no battery
- Easy cable installation : up to 3 split cores current transformers, 5 to 25mm cable diameter
- Easy counter installation : bottom, top, back or strap mounting. Up to 20m cable length.
- Durable device : glass window, stainless steel & HDPE plastic
Two versions of the split core exist, up to 16mm (as standard) or up to 20 mm (on request). The 16mm split core is suitable for ground lead with diameters from 5 to 26 mm. 250A minimum detection is achieved for diameters from 5 to 16mm. For diameters or airgaps above, the table below provides minimum detection current.
Air gap, mm | 0 | 2 | 4 | 6 | 10 | 15 | 20 |
Diameter of rod/conductor, mm | <16 | 16.1 | 16.5 | 17.1 | 18.8 | 21.9 | 25.6 |
Minimum discharge current, 8/20us, A
Conductor length | 3m | 250 | 350 | 450 | 500 | 600 | 650 | 700 |
10m | 250 | 370 | 500 | 600 | 700 | 800 | 900 | |
20m | 350 | 400 | 600 | 700 | 900 | 1000 | 1000 |
REFERENCE | VALUE |
EARTHING CONDUCTOR DIAMETER RANGE, mm | 5 to 16 | 35 to 150mm² |
EARTHING RIBBON, MAX, mm x mm | 20 mm x 60 mm |
MAXIMUM DISTANCE BETWEEN DISPLAY AND SENSOR | 20 m |
INSTALLATION ON THE CONDUCTOR | in parallel – clamped |
MINIMUM DISCHARGE PEAK CURRENT DETECTED - 8/20us waveform - IEC 62561-6 | 250 (500*) A |
MAXIMUM DISCHARGE PEAK CURRENT DETECTED - 10/350us waveform - IEC 62561-6 | 100 kA |
MINIMUM NUMBER STROKE REGISTRATION RATE | >= 2 counts/sec. |
MINIMUM TIME BETWEEN 2 STROKE FOR REGISTRATION, RESPONSE TIME | 20ms |
VOLTAGE DROP ON TERMINALS | < 1 V |
LONG DURATION CURRENT WITHSTAND CAPABILITY | 2500A for 4ms |
HIGH CURRENT WITHSTAND CAPABILITY | 100 kA |
FREQUENCY, Hz | 47 to 63 |
NUMBER OF DIGITS ON DISPLAY | 6 |
TYPE OF DISPLAY | MECHANICAL |
BATTERY POWER SUPPLY | NO |
SELF POWERED | YES |
RESET COUNTER METHOD | NO |
MEMORY ROM - Storage of last counter value | NO |
WEIGHT, kg | 1 Kg |
ENVIRONMENTAL CONSTRAINTS
TEMPERATURE - °C | Class C2: -40 to +70 |
PROTECTION CLASS | IP67, NEMA 4X |
TEMPERATURE CHANGE RATE - °C/min | Class C2: 1,0 |
RELATIVE HUMIDITY - % | Class C2: 10 to 100 |
MAX ABSOLUTE HUMIDITY - g/m3 | Class C2: 35 |
MAX ALTITUDE - m | 2000 |
ATMOSPHERIC PRESSURE - kPa | 70 to 106 |
STANDARDS/TEST | IEC 62561-6:2018 |
LABEL INCLUDES | Hardware version number, serial number, manufacturing batch |
UV STABILIZED HOUSING | YES |
STAINLESS METAL | YES |
TYPE OF SURGE COUNTER as per IEC 62561-6:2018 | Type 1 and |
The 3 current transformers SC250 is in all point similar to the 1 current transformer SC250 in terms of detection levels, electrical characteristics, withstand, performance and dimensions.
The device has been designed to monitor 3 earthing point simultaneously, that could include for example 3 x LLPD, as the LLPD have not be design to have specific groundings OR as the grounding path might not be unique.
The counter will totalize the surges on one unique counter, therefore it will not be possible to distinguish which location (current transformer) the surge originated from.
The usage of a 3 current transformers is justified to reduce time and cost of installation and ensure proper detection
