ZoneMaster Series
ZoneMaster provides total facility protection by stopping surge voltages on AC power
before they enter your building.
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ZoneMaster 300 is engineered to protect critical electronic systems from severe transient environments, providing decades of uninterrupted surge protection. A tested surge capacity of 300,000A assures a high level of protection from even the most severe lightning strikes.
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ZoneMaster 150 is designed to withstand the severe transient environment at large service entrance panels. 150,000A of independently tested surge capacity assures a high level of protection from severe lightning strikes.
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ZoneSentinel is specifically tailored for applications at distribution boards and small service entrance locations. When used at a local panel, in combination with a ZoneMaster at the service entrance, ZoneSentinel provides the lowest surge suppression voltages available today.



zm300.jpg (5424 bytes) ZoneMaster 300 Features:
  • 300,000A surge capacity per phase
  • Replaceable modules
  • Full protection redundancy
  • Module diagnostics
  • Color coded modules
  • Remote indication capabilities
  • Blocks lightning induced transient voltages at the main service panel
  • 50% smaller than other devices with similar capacity
  • NO/NC dry contacts for remote monitoring
  • NEMA 1, 2, 3, 3S, 4, 4X, 12, 13 rated enclosure
  • Ultra low impedance construction
  • Thermal and short circuit fusing
  • Five Year Warranty
  • >Patented Technology (No. 5,311,393)
Electrical Specifications
Maximum Surge Current Capacity per Phase:
300,000A (8/20µs)
Maximum Surge Current Capacity: L-N 300,000A (8/20µs)

L-L 300,000A (8/20µs)

N-G 75,000A (8/20µs)
Duty Cycle Performance:  200,000A (8/20µs) >4 Impulses
(Surge Life)   10,000A (8/20µs) >3,500 Impulses
200A (8/20µs) infinite
Maximum Continuous Operating Voltage:
25% above nomina
Remote Indication Contacts: NO/NC 125VAC 2A rated
Module Diagnostics: Protection Present Green LED

Fault warning Mechanical (fuse link operated) flag

High Voltage neutral to ground Red LED
Protection Technology:
Patented large block, three terminal MOV
Module Protection:
UL94-5V rated plastic enclosure



zm150.jpg (4018 bytes)ZoneMaster 150 Features:
  • 150,000A surge capacity per phase
  • Replaceable modules
  • Comprehensive diagnostics
  • Remote indication capabilities
  • NO/NC dry contacts for remote monitoringNEMA 1, 2, 3, 3S, 4, 4X, 12, 13 rated enclosure
  • Protection redundancy ensures reliability for critical lines
  • Low impedance construction
  • High N/G voltage warning
  • Dual thermal and short circuit fusing
  • Color coded modules
  • Five Year  - No fuss warranty
  • Patented Technology (No. 5,311,393)
Electrical Specifications
Maximum Surge Current Capacity per Phase:
150,000A (8/20µs)
Maximum Surge Current Capacity: L-N 150,000A (8/20µs)

L-L 150,000A (8/20µs)

N-G 75,000A (8/20µs)
Duty Cycle Performance:  100,000A (8/20µs) >4 Impulses
(Surge Life) 10,000A (8/20µs) >2,500 Impulses

150A (8/20µs) infinite
Maximum Continuous Operating Voltage:
25% above nominal
Remote Indication Contacts:
               NO/NC 125VAC 2A rated
Module Diagnostics: Protection Present                  Green LED

Fault warning Mechanical (fuse link operated) flag

High Voltage neutral to ground Red LED
Protection Technology:
Patented large block, three terminal MOV
Module Protection:
Dual thermal and short circuit fusing mechanisms, UL94-5V rated plastic enclosure



zs.jpg (3622 bytes) ZoneSentinel Features:
  • 90,000A per phase (tested capacity)
  • Modular Construction
  • Remote indication
  • NO/NC dry contacts for remote monitoring
  • Replaceable modules
  • Protects all equipment supplied from the same distribution board
  • Assures protection to 90,000A of surge current in a small package
  • NEMA 1, 2, 3, 3S, 4, 4X, 12, 13 rated enclosure
  • Low impedance construction
  • High N/G voltage warning
  • TEN mode protection
  • Five Year - No fuss warranty
  • Patented Technology (No. 5,311,393)
Electrical Specifications
Maximum Surge Current Capacity per Phase:
90,000A (8/20µs)
Maximum Surge Current Capacity: L-N 45,000A (8/20µs)

L-L 45,000A (8/20µs)

L-G 45,000A (8/20µs)

N-G 45,000A (8/20µs)
Duty Cycle Performance:  45,000A (8/20µs) >4 Impulses
(Surge Life) 10,000A (8/20µs) >1,500 Impulses
100A (8/20µs) infinite
Maximum Continuous Operating Voltage:
25% above nominal
Remote Indication Contacts:
NO/NC 125VAC 2A rated
Module Diagnostics: Protection Present Green LED

Fault warning Mechanical (fuse link operated) flag

High Voltage neutral to ground Red LED
Protection Technology:
Patented large block, three terminal MOV
Module Protection:
Dual thermal and short circuit fusing mechanisms, UL94-5V rated plastic enclosure