ABB RXDS4

ABB RXDS4

Product Brief:​ The RXDS4 (or modern equivalent = ABB secondary injection test set— often 3-phase current + 3-phase voltage, USB/PC controlled or standalone with keypad) is used by protection engineers / commissioning techs to inject secondary values into a protection IED (REF615, REC670, REG670…) to verify:

  • OC pick-up current & time dial characteristic
  • EF (residual & core-balance) sensitivity & direction
  • Distance zone reach (by injecting balanced V/I → compute Z)
  • Diff slope / unrestrained pickup (inject currents to both ends in diff test)
  • Binary I/O operation (simulate 52a/b, ext trip block)
  • Disturbance record trigger & playback (some advanced sets can replay COMTRADE)
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Category: SKU: ABB RXDS4

Description

ABB RXDS4

  • Technical Specifications (typical modern 3-phase test set — RXDS4 era or successor):
    • Current Outputs: 3 × phase (0–100 A @ 250 VA max each; 0–300 A short-time for primary inj adapter), 1 × residual (0–10 A)
    • Voltage Outputs: 3 × phase (0–4 × 250 V L-L @ 60 VA per phase; 0–150 V L-N)
    • DC Outputs: ±10 V / ±20 mA (for transducer test)
    • Binary Inputs: 4–8 (monitor relay contact closure — measure operate time)
    • Timer Resolution: 0.1 ms
    • Control: Local keypad + LCD or PC software (via USB / Ethernet)
    • Memory: Store test plans (OC curve, diff slope sweep, zone reach pts)
    • Power: 230 V AC 50/60 Hz (internal SMPS)
    • Dimensions: Bench-top ≈450×150×350 mm; weight ≈12–18 kg
    • Safety: CAT III 300 V (for secondary injection only — NOT for primary HV)
  • Functional Features:
    • Ramp & pulse injection (step-change or linear ramp)
    • Simultaneous V & I injection (for distance / power swing / directional element test)
    • Diff test: inject I1 & I2 with phase shift → verify slope 1 / slope 2 operate points
    • GOOSE simulate (on newer sets with IEC 61850option) — inject MMS/GOOSE to test IED subscription
    • Playback COMTRADE file (from relay disturbance record) → reproduce exact fault condition
  • Application Scenarios:
    • Commissioning new REF615 / REC670 — verify OC/EF/diff/zone settings before energizing primary
    • Annual/5-yr protection maintenance — functional test per utility PM schedule
    • Fault analysis — playback COMTRADE from relay → confirm relay would have operated (or why it didn’t)
    • Training new protection technicians
  • Material & Structure / Working Principle / Installation / Precautions:
    • Use only on secondary side (CT/VT secondaries)​ — NEVER connect to primary HV / MV
    • Before connecting to relay: set outputs to ZERO; verify polarity (Ia+ → S1, Ia– → S2 of CT secondary — match relay polarity)
    • For CT secondaries: short CTs with test set’s shorting links when not injecting — test set usually has built-in shorting plugs for each CT terminal
    • Perform ramp test: start 0 → slowly increase to pick-up → note current & time → compare to setting × curve
    • After test: return outputs to zero; remove leads; restore CT shorting links / reconnect relay
    • Precautions:
      • CT circuit: ensure CT primaries de-energized before connecting test set; short CT secondaries with test set’s shorting plugs when disconnecting — same rule as relay removal
      • Do NOT exceed current/voltage rating of test set — especially on low-current sensitive EF tests (use lowest range for 5–10 %In pick-up)
      • Verify ground (PE) of test set connected — for safety & stable measurements
      • For diff tests with two ends: both I1 & I2 injected simultaneously — ensure phase angle & CT ratio compensation set correctly in test plan
      • Keep test set calibrated (annually/biennially) — traceable cert required for commissioned settings acceptance

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