| As you would expect from the leading supplier of high voltage capacitors, Cooper offers an unexcelled range of capacitor bank protection relays.
The Idea Workbench feature permits Cooper to develop unique capacitor bank protection and control schemes specific to your unique requirements. For more information on a custom protection scheme, contact your local Cooper Power Systems representative or e-mail us.
| Relay Model |
Description |
Primary Cap Bank Configuration |
| iCP-191 |
Impedance based unbalance protection |
Grounded or ungrounded wye |
| iCP-440 |
Neutral unbalance protection |
Double wye ungrounded |
iCP-630
|
Negative sequence current difference (NSCD) unbalance protection |
Ungrounded |
| iCP-640 |
Voltage differential unbalance protection |
Grounded wye |
iCP-191 Impedance based unbalance protection for grounded, fuseless banks
The iCP-191 fuseless capacitor bank protection relay is a full-featured Edison® Idea™ relay suitable for multi-string, fuseless, grounded shunt capacitor or filter bank protection and control applications. The relay calculates the apparent impedance of each string and determines capacitor unit failure when the impedance changes beyond a threshold. Protection on a per-string basis permits enhanced sensitivity and rapid identification of capacitor problems to the effected string. Protection on a per-string basis permits greater bank availability: set protective levels relative to actual string capacitor overvoltages instead of cumulative effects measured at the neutral, or internal tap, due to capacitor shorted sections distributed over several strings. The bank remains in service with multiple shorted series sections in various strings until the capacitor unit overvoltage is exceeded. This greater Mvar availability could be critical during a system-wide disturbance. The iCP-191 also provides advanced power quality, metering, communication and PLC functions.
- Catalog Section 165-191-903
iCP-440 Neutral unbalance protection
The iCP-440 capacitor bank protection relay is a full-featured Edison® IdeaTM relay suitable for shunt capacitor or filter bank protection and automatic voltage control applications. The relay is ideally suited for new or retrofit applications of fuseless or internal/externally fused banks requiring neutral unbalance protection. It utilizes voltage or current neutral unbalance to provide flexible protection for both grounded and ungrounded banks. Single or double wye bank configurations may be accommodated. The relay easily permits nulling of inherent bank unbalance and compensates for real time system unbalances (single wye) thus permitting maximum sensitivity for detection of internal problems. The relay detects capacitor unit failure when the compensated neutral quantity increases beyond a threshold. The neutral unbalance algorithms permit secure and economical protection on banks of various var ratings. The iCP-440 also provides advanced power quality, metering, communication, and PLC functions.
- Catalog Section 165-440-900
iCP-630 Negative sequence current difference (NSCD) unbalance protection, for ungrounded banks
The iCP-630 capacitor bank protection relay is a full-featured Edison® IdeaTM relay suitable for ungrounded shunt capacitor or filter bank protection and automatic voltage control applications for both externally fused and fuseless capacitor units. Reduce bank procurement, installation and maintenance costs by eliminating the need for the voltage transformer connected from the neutral to ground. Single or double wye bank configurations are accommodated. The relay easily permits nulling of inherent bank unbalance and compensates for system unbalance thus permitting maximum sensitivity to detection of internal problems. The relay detects capacitor unit failure when the compensated negative sequence quantity increases beyond a threshold. The unbalance algorithm permits secure and economical protection on banks of various var ratings. The iCP-630 also provides advanced power quality, metering, communication and PLC functions.
- Catalog Section 165-630-900
iCP-640 Voltage differential unbalance protection
The iCP-640 capacitor bank protection relay is a full-featured Edison® IdeaTM relay suitable for fuseless, internal or externally fused shunt capacitor or filter bank protection and automatic voltage control applications. The relay is ideally suited for new or retrofit applications where highly sensitive capacitor unbalance detection based on voltage differential or impedance is required. The relay easily permits nulling of inherent bank unbalance thus permitting maximum sensitivity to detection of internal problems. The relay detects capacitor unit failure when the compensated voltage differential or impedance change quantity increases beyond a threshold. The unbalance algorithms permit secure and economical protection on banks of various var ratings. The iCP-640 also provides advanced power quality, metering, communication and PLC functions.
- Catalog Section 165-640-900
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