Not active product since 2007
The combined overcurrent and earth-fault relay SPAJ 320 C is used for short-circuit protection, time overcurrent protection and residual earth-fault protection for radial overhead and cable feeders in solidly earthed or low-resistance earthed networks. The relay may also be used in a variety of other applications requiring phase overcurrent protection and/or residual earth-fault protection.
Scope
- Combined overcurrent and earth-fault protection
Product benefits
- Protection for a variety of applications
Product features
- Three-phase low-set overcurrent protection with inverse time or definite time characteristic
- Three-phase, high-set, instantaneous or definite time overcurrent protection
- Non-directional, sensitive, definite time, residual current earth-fault protection
- Non-directional, high-set, instantaneous or definite time, residual current earth-fault protection
- Harmonics measuring module for blocking the earth-fault protection module
- Control input for an incoming external blocking signal
- Local man-machine communication via push-buttons and digital displays on the front panels of the relay modules
- Serial interface for connecting the relay to higher-level data acquisition systems, local or remote control systems or other host systems via optical fibers
- Local operation indication via LED indicators with memory function and via the digital display
- Compact and robust mechanical design in an aluminium case to IP 54
- Continuous self-supervision and auto-diagnostic fault indication to facilitate fault location and repair after detection of an internal relay fault
- Powerful software support for parameterisation of the relay, for reading measured and recorded values, events, etc., and for storing readings
- Member of the SPACOM product family and ABB’s Substation Automation system