Residential /
Industrial
Surge
Protection
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TES 277SE

Commercial / Industrial

Applications
Three Phase 277 VAC Surge Arrester for both commercial and industrial usage. Installed at wattmeter, service entry or weatherhead, safety clamps and dissipates lightning induced AC line high voltage current impulses going to a residence, apartment or a light industrial building.

Description
Introducing the TES 277 SE Surge Arrester, installed at wattmeter, locations for commercial and industrial applications. The TES 277 SE Surge Arrester is specifically designed for long lifetimes even with strong lightning activity and temporary line overvoltage conditions. A tough Surge Arrester for tough line conditions..

Features
  • 40,000 Amp peak capability, each phase
  • Temporary overvoltage clamping capability.
  • Lowest, reliable voltage clamping level
  • Safety fusing,  all phases, patented
  • LED "unit good" indicators, all phases
  • Fire proof and explosion-proof polycarbonate glassfiber reinforced enclosure with matching mounting connector
  • Sealed units except for mounting connector wiring opening
  • For less inductance, #10 AWG tinned wires.
  • Competitive pricing

Electrical Ratings
Maximum Peak Surge Current (all phases)

Excellent
40 KA
Maximum Clamping Voltage Level @40kA (all phases)

Very Good
1900VDC

Start Clamping Voltage Level @ 1mA (all phases)

Very Good
510VDC

Accelerated Life Test - look at the test results and the guidelines for testing of TESCO products.

Surge Arrester still in excellent condition at end of tests. No arcing.
Temporary Overvoltage - continuous, 5 minutes, maximum line voltage without thermal runaway.

Excellent
440VAC

End of Life Failure Mode

While in overvoltage induced thermal runaway, apply 7kA at operating voltage. Surge arrester must fail safe without faulting the AC line. No arcing allowed.

Surge Arrester still in excellent condition at end of tests. No arcing.
Enclosure Flammability (550C or greater) 960C, UL 94 V1
Ultra-Violet Resistance Good UV stability in tropical conditions
Salt-Fog Corrosion Resistance Chemical Resistance
Enclosure dimensions 12"X10"X4"
Recommended "Hole Size" for Mounting Connector 1.12"

 

Copyright © 1998 TESCO. All rights reserved.
Revised: May 23 , 2000.