Mains Power Protection

Shunt Powerline Protection

ILSE offers a wide selection of technologies and products which are available for transient protection of the mains power supply at the point of entry to your facility. These products / technologies are represented in two categories shunt protection and series protection.

• Ideal for robust equipment such as air conditioning, pumps and motors
• Point of entry protection
• Energy diversion only, voltage clamping devices installed between each phase and neutral or earth on mains switch board

Class I Protectors, (Spark Gap based) per IEC 61643

Ordering Code Description SGT50-25 Din Mount Spark Gap L-N, L-E protection, 240VAC Nominal, 50kA 10/350μs SG60 Din Mount Spark Gap L-N, L-E protection, 440VAC Nominal, 60kA 10/350μs NE100 Din Mount Spark Gap N-E protection, 240VAC Nominal, 100kA 10/350μs Single phase and Three phase protectors fitted into steel enclosures (IP55) are available as 1PPM and 3PPM. Ask ILSE for further details.

Class II Protectors, (MOV based) per IEC 61643

Ordering Code Description SST150 Din Mount, L-N, L-E protection, 240VAC Nominal, (385V Uc), 50kA 8/20μs SS140-275 Din Mount L-N, L-E protection, 110-240VAC Nominal, (275V Uc), 40kA 8/20μs SS140-480 Din Mount L-N, L-E protection, 240VAC Nominal, (480V Uc), 40kA 8/20μs 3XSS140-275+NE15 Din Mount 3 phase L-N and NE protection, 110-240VAC Nominal, (275V Uc),40kA 8/20μs SST150, and both SS140 products all contain changeover alarm contacts and indicators. The 3XSS140-275+NE15 only has indicators (no alarms contacts).

Series Powerline Protection

Series powerline protection is the best available protection for sensitive electronics such as rectifiers, switchmode power supplies, and other mission critical equipment. The Series Filter reduces the rate of rise of any transient overvoltage to acceptable levels, and also reduces the overall magnitude of the transient voltage the equipment receives.

Low Current Single Phase Filters
Location: IEC 61643 Class III

Ordering Code Description DLSF-8A DIN line surge filter, 1Ph 240Vac, 3 modes of protection, 12kA 8/20μs L-N primary DLSF-16A protection, 12kA 8/20μs L-N secondary protection, and 20kA 8/20μs N-E protection. DLSF-20A 110Vac version available upon request Variants available with 8A, 16A and 20A load current capacity

Single and Three Phase Surge Filters
Location: IEC 61643 Class I, II & III

Standard Surge Filter Order code:

SF X YY A-NE

Where X is number of phases, and YY is circuit current rating per phase.
Other voltages available on request.

Standard Surge Filter specifications:

All units can withstand overvoltage and fault conditions in accordance with IEC 61643 requirements. All units incorporate non saturating inductors combined with high reliability capacitors to form an effective low pass filter, incorporating shunt protection elements on the line and load sides.