Protection relays have different functions. They are often made up of several modules, each of which performs a specific function. In this guide, we will distinguish three types of functions: protection against abnormal variations in the main supply, protection against leakage currents, and protection against overloads.
Protection against abnormal grid variations
Abnormal voltage, current, and frequency variations can lead to problematic phenomena....
over-current protection relay
VACON® NXP DCGuard
Tripping current: 3 A - 4,140 A
Trigger voltage: 465 V - 1,100 V
... different DC grids with voltage differences up to full DC voltage, thanks to controlled voltage ramp-up • Transmission cable overload protection • Reliable, proven technology Easy dimensioning Rated VACON® NXP DCGuard™ ...
three-phase motor pump protection relay
SubMonitor
... current on all three legs at the same time, and fault messages are in easily understandable text ■ Monitors: ○ Under/overload ○ Under/overvoltage ○ Current unbalance ○ Overheated motor (Subtrol equipped) ...
Remove all
Compare up to 10 products
Please specify:
Help us improve:
remaining