产品名称：DB-1演示板

• 1)   Power supply network socket 230 V.
  2)   Additional PE socket.
  3)   230 V power supply signalling diode.
  4)   RCD switch.
  5)   Measurement socket.
  6)   TN network jumper.
  7)   TT network jumper.
  8)   RE1 (ZW RE1) earth electrode jumper.
  9)   Equipotential pipe connection jumper H2O (ZW H2O).
  10) RE2 (ZW RE2) earth electrode jumper.
  11) Measurement points P1, P2, P3, P4, P5.
  12) Measurement point of the RE1 (E1) earth electrode.
  13) Measurement point of the RE2 (E2) earth electrode.
  14) Measurement electrode sockets.
  15) Irregularity selection switch.
  16) Ground type switch for ground resistivity measurements.

The board DB-1 simulates home distribution network. It enables to demonstrate the method of carrying out the following tests:

• short-circuit loop impedance for the evaluation of automatic supply disconnection,
• RCD disconnection time and current,
• earthing resistance,
• earth resistivity,
• continuity of equipotential bondings,
• insulation resistance,
• mains power voltage.

It is possible to simulate typical faults and irregularities in the power network.

The technical parameters of the board DB-1 and the properties of particular functions:

• Short-circuit loop impedance:
  - measurement of the short-circuit loop impedance L-N with impulse current to 25A and 60ms,
  - measurement of the short-circuit loop impedance L-PE with current to 20mA.
• RCD security parameters (switch 30mA):
  - disconnection time measurement of RCD,
  - measurement of RCD disconnection current,
  - measurement of earthing resistance,
  - measurement of touch voltage.
• Earth resistivity:
  - measurement of resistivity for three types of ground (14Ωm; 300Ωm; 6,2Ωm).
• Earthing resistance.
• The measurement with the method:
  - 2-pole,
  - 3-pole,
  - 4-pole,
  - three pole method with clamps,
  - 2-clamps.
• Continuity of connections:
  - Measurement of equipotential bondings and connections of available parts.
• Insulation resistance:
  - measurement of L-N insulation,
  - measurement of L-PE insulation,
  - measurement of N-PE insulation.
• Voltage measurement:
  - measurement of voltage in the plug-in socket.
• Simulation of irregularities:
  - lack of continuity of earthing conductor (RE),
  - exceeding of safety voltage during the measurement RCD (UB),
  - leakage current (IErr),
  - too low insulation resistance L-N (RISO(L-N)),
  - too low insulation resistance L-PE (RISO(L-PE)),
  - too high short circuit loop impedance (ZL),
  - error of RCD system (RCD).