The SPE System is an electronic voltage- and current power source and a meter supply unit (phantom load) for testing electricity meters or for testing other devices which use current or voltage. In addition to the generation of standard test values, the meter test equipment offers the following options:
 
• Addition of harmonics to the voltage and current paths up to 40 % of the fundamental wave
• Generation of ripple control signals up to 10 % of the fundamental wave of the voltage path
• Generation of test values synchronous to network frequency for examinations of extremely network sensitive measuring instruments
• Generation of unsymmetrical test values of polyphase test systems
 
The cabinet is equipped with the following components:
• Control unit STE 10 • Power source SPE 120.3 with digital voltage and current amplifier
• Digital electronic reference meter SRS 121.3 or other types (Option)