PROTEC Z / PROTEC Z+ Surge Suppressor
Advanced Switching Surge Protection
In addition to providing the same core switching transient protection as the ZORC, the PROTEC Z+ model offers advanced safety and monitoring capabilities. Consequently, this series serves as a specialized solution for eliminating destructive surges that occur when switching high-voltage equipment like motors and generators.
Protect Z Family
The PROTEC Z family consists of surge suppressors designed to protect medium voltage motors, generators, and transformers against transient switching surges. Specifically, these suppressors alter circuit parameters to ensure that over-voltages remain suppressed within IEEE ratings. Furthermore, they are highly recommended for systems incorporating vacuum, SF6, and metal vapor contactors or breakers. Finally, to suit various needs, PROTEC Z units are available in compact and standard versions for LV, MV, and HV applications.
|
Feature |
Specification |
Details |
|---|---|---|
|
Primary Protection |
Switching Transients/Surges |
Protects against surges generated by switching operations (e.g., VCBs). |
|
RC Circuit |
0.2 µF Capacitor, 30 Ω Resistor |
Identical core specifications to the ZORC. |
|
Voltage Range |
MM3 / PM3 (5 kV – 13.8 kV) SSW |
A single unit can be used across this entire voltage range (e.g., 6.6kV, 11kV) as the capacitor is wound to withstand the maximum system voltage (13.8kV), and the RC circuit remains tuned for high-frequency transients. |
|
Insulation Withstand |
95 kV BIL (North/South American/High-BIL) |
Required for 11kV systems in some regions (like Australia). This version has larger bushing sizes. Note: A compact 8-11kV version for the African market may have a lower 75kV BIL to fit smaller terminal boxes. |
|
Advanced Features |
PROTEC Z+ Model (Standard) |
Includes Partial Discharge Monitoring and a Pressure-Activated Safety Switch for enhanced system safety. |
|
Safety Switch |
Dry Contact (N/O and N/C) |
The safety switch is a pressure-activated dry contact. It triggers if the internal pressure rises by 0.5 bar due to factors like harmonics, long-duration overvoltages, or high external temperature. It can be wired to a latching alarm, PLC, or SCADA system to indicate a condition requiring inspection and prevent a catastrophic failure (similar to a Buchholz relay on a transformer). The switch returns to its normal state once the internal oil pressure is normalized. |
Commercial and Logistics
| Feature | Details |
|---|---|
| Manufacturing/Origin | Made in Europe  |
| Pricing | Contact us! |
| Warranty | 12-month warranty is provided for the PROTEC Z series |
| Payment Terms | Contact us for options |
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