Products Commercial Arrestors

Rapid Response, High Current. Delta Surge/Lightning Arrestors™ Help Prevent Damage to Computers and other Electronic Equipment. Category B & C and Type 1 & 2

LA 301

$ Pricing Info

Weather Proof N-4
Case Dimensions:
2 1/4" Diameter
4 1/2" High

LA301 - For 120-250 V, Single Phase, 2 Wire Service

Rated voltage 125-250 Volt, two wire service. Used when one hot wire of a single phase system is to be protected.

INSTALLATION:
Fasten arrestor in place. Use a Delta mounting bracket, part # MB, a pipe strap, or a knockout hole. Connect the black wire to the hot line at any convenient point load-side of an existing fuse or circuit breaker. Connect the white wire to an existing ground system and the grounded metal frame work of the equipment to be protected, or make a ground source per NEC Article 250.

LA 302

$ Pricing Info

Weather Proof N-4
Case Dimensions:
2 1/4" Diameter
4 1/2" High

LA302 - For 120-250 V, Single Phase, 3 Wire Service

Rated voltage 125-250 Volt, three wire service. Used when two hot wires of a single phase system are to be protected.

INSTALLATION:
Fasten arrestor in place. Use a Delta mounting bracket, part # MB, a pipe strap, or a knockout hole. Connect the black wires to the hot line at any convenient point load-side of an existing fuse or circuit breaker. Connect the white wire to an existing ground system and the grounded metal frame work of the equipment to be protected, or make a ground source per NEC Article 250.

LA 303

$ Pricing Info

Weather Proof N-4
Case Dimensions:
2 1/4" Diameter
4 1/2" High

LA303 - For 250 V, Three Phase, 3 or 4 Wire Service

Rated voltage 250 Volt, three or four wire service. Used when three hot wires of a three phase system are to be protected.

INSTALLATION:
Fasten arrestor in place. Use a Delta mounting bracket, part # MB, a pipe strap, or a knockout hole. Connect the black wires to the hot line at any convenient point load-side of an existing fuse or circuit breaker. Connect the white wire to an existing ground system and the grounded metal frame work of the equipment to be protected, or make a ground source per NEC Article 250.

300 Series Specifications

Type of Design Silicon Oxide Varistor
Maximum current 100,000 amps
Maximum energy 3,000 joules per pole
Maximum number of surges Unlimited
Response time one milliamp test 5 nanoseconds
Response time to clamp 10,000 amps 10 nanoseconds
Response time to clamp 50,000 amps 25 nanoseconds
Leak current at double the rated voltage none
Leads 36" #12 THHN
Case material PVC
Locknut and Washer 1/2" - 3/4"
Category B & C and Type 1 & 2
Conduction Characteristics
8 x 20 microsecond wave shape - ANSI IEEE NEMA Standard
Discharge Current 5000 A 10000 A 20000 A 40000 A 60000 A 80000 A 100000 A
Clamping Voltage
(Line to Neutral)
240 V 480 V 840 V 1300 V 2000 V 3000 V 4000 V
Unlimited Operations One Operation
Electrical work is hazardous. Bad connections can result in fire, injury or death. Installation must only be done by qualified electricians.

In the event that a lightning discharge is so powerful that something has to be destroyed, the arrestor will take the damage. When sufficient heat and stress causes failure, a one inch hole will open at the bottom of the enclosure. Hot silica and plastic bits will be expelled. Installing the arrestor in any approved electrical box will prevent accidental contact with a damaged unit.