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TVSS Surge Protection Zones A, B, C

Published by Jason Koffler on 18 June 2011

Did you know?

Most Uninterruptible Power Systems (UPS) and DC standby power systems incorporate some form of transient protection in the form of Metal Oxide Varistors (MOVs). These are designed to protect their front end filters and
rectifiers from small transients. In severe environments or where repetitive transients are common, the MOVs will eventually wear out.

They will not achieve the levels of protection provided by a dedicated Transient Voltage Surge Suppressor (TVSS). UPS based on Constant Voltage Transformer(CVT) technologies will provide superior protection from transients. However large transient surges will cause the CVT to current limit. This will restrict the output voltage and current supplied to the load(s) until the problem is removed.

To provide ‘bullet-proof’ protection install a Zone C or Zone B StrikeSafe device before your UPS or DC standby power system. In a UPS installation, this approach prevents the load being connected to a direct lightning and transient path when powered directly from the mains.

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Zone C TDCE/TPCE Specifications

• Operating Voltage: Max +25% above nominal
• Operating Temperature Range: -40 to +85°C
• Diagnostics: Front panel LEDs and remote alarms
• LEDs or Neons: Green-Power ON, Red-Fault
• Remote Alarm: Single pole, volt-free contacts
• Thermal and Overload Protection: Thermal and wire fuses
• Case Type and IP Rating: IP55, plastic
• Maximum Current Rating: 100A series or unlimited parallel
• Power Consumption: Negligible
• Automatic Reset: No mechanical reset
• Design standards: EN 61000-4, EN 60950, EN 60335-1, EN 50081-1 and EN 50081-2
• Options: Neutral-Ground module, Transient counter

Zone B TSB/TBB Specifications

• Operating Voltage: Max +25% above nominal
• Operating Temperature Range: -40 to +85°C
• LEDs: one tri-coloured LED per plug-in module indicating 100/50/0% protection available
• Remote Interface: 2.5mm2
• Remote Alarm: Single pole change over, volt-free contacts
• Thermal/Overload Protection: Thermal and wire fuses
• Case Type and IP Rating: IP20, plastic
• Power Consumption: Negligible
• Automatic Reset: No mechanical reset
• Design standards: EN 61000-4, EN 60950, EN60335-1, EN 50081-1 and EN 50081-2

Zone A TDA Specifications

• Operating Voltage: Maximum +25% above nominal
• Operating Temperature Range: -40 to +85°C
• LEDs: one green LED per module
• Remote Interface: 2.5mm2
• Remote Alarm: Single pole change over, volt-free contacts
• Thermal/Overload Protection: Thermal and wire fuses
• Case Type and IP Rating: IP20, plastic
• Power Consumption: Negligible
• Automatic Reset: No mechanical reset
• Design standards: EN 61000-4, EN 60950, EN60335-1, EN 50081-1 and EN 50081-2

Product Selector

System Size TVSS
<2k1VA 1 phase input TSB or TBB 30KA11* TDA 10KA11*
2k1-10kVA 1 phase input TSB or TBB 30KA11*
>10kVA 1 phase input TSB or TBB 30KA11*
<30kVA 3 phase input TSB or TBB 30KA33*
30-60kVA 3 phase input TDCE 200KA33* TSB or TBB 30KA33*
>60kVA 3 phase input TDCE 200KA33*
  • Denotes variant of the TVSS device call us for more information.