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ERICO

Surge Reduction Filter N-Series, Three Phase

Features

  • High-performance protection incorporating Spark Gap and Transient Discriminating (TD) technologies
  • High surge rating ideal for exposed critical service entrance applications
  • Reduces let-through voltages and rate-of-voltage rise (dv/dt) and helps provide optimum protection for electronic equipment
  • Extreme reliability and simplified design with direct connection from input to output
  • Comprehensive front panel status and internal diagnostic LEDs

Specifications

Part Number SRF363N SRF3125N SRF3250N SRF3500N SRF3800N
Nominal System Voltage (Un) 220/380 - 240/415 VAC
Distribution System 3Ph Y 4W+G
System Compatibility TN-C
TN-C-S
TN-S
TT
Rated Load Current (IL) 63 A 125 A 250 A 500 A 800 A
Frequency 50 – 60 Hz
Short Circuit Current Rating (SCCR) 43 kA
Heat Dissipation 34 W 56 W 98 W 215 W 260 W
Rate of Voltage Rise (dV/dt) 5 V/µs Max 10 V/µs Max 11 V/µs Max 10 V/µs Max
Filtering -40 dB @ 100 kHz
Input Connection 10 - 35 mm² 25 - 120 mm² 10 mm Stud (2) 10 mm studs
Output Connection 10 - 35 mm² 25 - 120 mm² 10 mm stud (2) 10 mm studs
Protection Modes All modes protected
Technology Spark Gap
In-line series low pass sine wave filter
TD technology with thermal disconnect
Enclosure Material Metal
Enclosure Rating IP 65 IP 32
Mounting Wall mount
Status Indication Front panel LED
Internal diagnostic primary and secondary protection LEDs
Change-over contact (Form C dry), 250 VAC/30 VDC/5 A, 4 kV isolation
Depth (D) 7.87" 11.81"
Height (H) 19.69" 31.50" 39.37" 47.24"
Width (W) 15.75" 23.62" 31.50"
Unit Weight 39.0 lb 47.6 lb 91.9 lb 168.9 lb 214.3 lb
Complies With IEC® 61643-11 Class I, Class II
ANSI®/IEEE® C62.41.2-2002 Cat A, Cat B, Cat C
ANSI®/IEEE® C62.41.2-2002 Scenario II, Exposure 3, 100 kA 8/20 μs, 10 kA 10/350 μs
IEC 61643-11  Ratings
Part Number SRF363N SRF3125N SRF3250N SRF3500N SRF3800N
Max Continuous Operating Voltage (Uc) 255 VAC
Temporary Overvoltage, L-N 442 VAC 2 hours
Temporary Overvoltage, N-PE 1200 VAC 200 ms
Impulse Current (Iimp) 10kA 10/350 μs
Voltage Protection level (Up), L-N @ Iimp 450 V 500 V 550 V
Nominal Discharge Current (In) 20kA 8/20 μs
Voltage Protection level (Up), L-N @ In 450 V 500 V 650 V
Voltage Drop  0.1 % Max
IEC 61643-11 Annex A specifies Max Continuous Operating Voltage (Uc) as 255 VAC.
IEC 61643-11 test procedure limits maximum Impulse Current (Iimp) to 10kA due to internal product safety fusing.
IEC 61643-11 recommends a maximum preferred value for Nominal Discharge Current (In) of 20 kA.
IEC 61643-11 Temporary Overvoltage tests are passed in withstand mode.
Upstream overcurrent protection not exceeding Rated Load Current (IL) shown above must be installed ahead of the surge reduction filter.

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ANSI is a registered trademark of American National Standards Institute.
IEC is a registered trademark of the International Electrotechnical Commission.
IEEE is a registered trademark of The Institute of Electrical and Electronics Engineers, Inc.