Protective relays
Our comprehensive portfolio of protection technology enables reliable grid availability in the voltage ranges of 10 kV to 110 kV. The protective and control devices can be used in, for example, single and double busbar applications, as well as radial, looped, and meshed grids. They can also be used in insulated, compensated, rigid, and low-resistance grounded grids.
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Your advantages at a glance Digital protective relays for intelligent mains protection
- Large functional scope with protection, control, and measurement functions in a compact design
- Intuitive operation with clearly laid-out front panel and simple configuration options
- Long service life with battery-free design and extremely low power consumption
- Satisfies IT security requirements in accordance with the BDEW white paper
Which protective relay is right for me?
Intelligent mains protection with KOMBISAVE+
The protective relays of the KOMBISAVE+ product family are perfectly suited for use in the distribution grid. Motors, transformers, cables, and lines can be protected in switching devices with single or double busbars.
The devices include a large range of functions, from overcurrent protection through to QU protection, distance protection and line differential protection, synchro check, and automatic reconnection.
Transformer current-supplied mains protection with POWERSAVE
POWERSAVE is a compact and powerful protective relay with a
full range of protection, control, and measurement functions. With the optional integrated power management for direct triggering of the circuit breaker, the device solution is independent of the external power supply.
The combination of energy management and distance protection functions makes the protective relay indispensable as blackout protection.
Direct comparison of the protective relays
In just a few steps, identify the right system for you for reliable protection technology.
 |
 |
|
|---|---|---|
| KOMBISAVE+ | POWERSAVE | |
| Protective function | ||
| Overcurrent and motor protection | ✔ | ✔ |
| Feeder protection with distance protection, ground fault detection, and field control | ✔ | ✔ |
| Transformer differential protection with field control | ✔ | - |
| Line differential protection with distance protection, ground fault detection, and field control | ✔ | - |
| Device properties | ||
| Integrated power management (energy storage, converter power supply) | - | ✔ |
| Maximum number of current/voltage/sensor inputs | 8/5/0 | 4/3/3 |
| Freely configurable function keys/indicators | 4/0 | 3/2 |
| Maximum number of binary inputs and outputs | 22/23 | 8/8 |
