ABB PCD237A101 (3BHE028915R0101) Digital Protection Relay
1. Safety Precautions
HAZARD CLASSIFICATION (per IEC 61810-1)
| Symbol | Meaning | Required Action |
|---|---|---|
| High-voltage hazard | De-energize before servicing | |
| Functional safety warning | Verify settings with PCM600 software |
Personal Protective Equipment:
- Category III arc-flash suit (40 cal/cm²)
- 1000V insulated tools

2. Commissioning Procedure
Step 1: Pre-energization Checks
1.1 Verify insulation resistance: • Primary circuits: ≥100MΩ @ 2.5kV DC (IEC 60255-5) • Secondary circuits: ≥10MΩ @ 500V DC 1.2 Apply test voltage gradually: 25% → 50% → 75% → 100% of rated voltage (110V DC/230V AC) Hold each step for 5 minutes
Step 2: Function Verification
| Test | Method | Pass Criteria |
|---|---|---|
| Overcurrent (51) | Inject 1.05× pickup current | Trip time ±3% of setting |
| Earth Fault (67N) | Apply 30° phase-angle shifted current | Directional decision ≤20ms |

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