ABB’s SPAE-010 RS493001 is a high-impedance protective relay designed for ground fault protection in transformers, motors and generators. These relays are known for their high impedance differential current ground fault protection and are sometimes referred to as limited ground fault relays (REF). The relays of the SPAE-010 and SPAE-011 models are functionally identical, the main difference between them being the auxiliary supply voltage range: the SPAE-010 is suitable for 80-265V AC, while the SPAE-011 is suitable for 18-80V DC.

The design of the SPAE-010 includes a built-in stabilizing resistor, which helps maintain the stability of the protection when the current transformer is saturated. When the current transformer is saturated, its impedance will be rapidly reduced, and through the resistor in the relay, the secondary current of the unsaturated current transformer can flow through the secondary circuit of the saturated current transformer, thus ensuring protection selectivity.

SPAM-150C

The SPAE-010 relay offers high precision and long-term stability thanks to its digital and software-based design. It also has a continuous self-monitoring system that can monitor the hardware and software status of the relay in real time, including the auxiliary power supply module. In addition, the SPAE-010 has network control system management functions, such as through S.P.I.D.E.R. MicroSCADA, as well as a serial interface for connecting relays to the SPA bus and higher level host systems.

In terms of technical data, the SPAE-010 has a rated voltage of 50V, 100V or 200V, a thermal tolerance of 1.3 times the rated voltage for 1 second continuously, and a rated frequency of 50Hz or 60Hz. Its protection features include a voltage setting range of 0.4 to 1.2 times rated voltage, operating current of 9 to 27mA, operating time of 17 to 80 ms, shedding time of no more than 120 ms, and shedding/picking ratio of 0.8.

The auxiliary supply voltage range of the SPAE-010 relay is 80 to 265V AC or DC, and the power consumption is about 5 watts. It has also passed a number of insulation and electromagnetic compatibility tests, including voltage resistance tests and anti-interference tests, ensuring reliability and stability in a variety of environments.

Overall, the SPAE-010 RS493001 is a high-performance protective relay for power systems and industrial applications that require high impedance protection, ensuring the safety and reliability of the system.