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Core Balance Current Transformer (CBCT) for use with earth leakage relays.

17H7NNQN3 is an earth leakage relay requiring a core balance current transformer (CBCT) to detect ground faults. It offers adjustable trip currents and delays, operates on AC/DC supply and provides outputs rated 5 A at 250 VAC / 30 VDC.

Stock Code: 17H7NNQN3

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This Core Balance Current Transformer (CBCT) is designed to work with GIC Earth Leakage Relays to detect residual current in 3-phase systems.

🔧 Technical Highlights:

  • Supply Voltage: Varies (15 V DC or 220–415 VAC/DC)
  • Functions: Detects earth leakage currents via external CBCT; provides trip signal; auto/manual reset
  • Timing Range: Trip delay adjustable (model specific)
  • Output Contacts: 1 C/O (SPDT)
  • Contact Rating: 5A @ 250 VAC / 28 VDC (resistive)
  • Requires a separate core balance current transformer (CBCT)
  • Auto or manual reset options

✅ Benefits:

  • Reliable leakage detection when used with ELR
  • No moving parts or external power required
  • Wide range of sizes available to suit system load

🚀 Applications:

  • Distribution panels
  • Generator and UPS systems
  • Motor control centers

Use with compatible ELRs to form a complete earth fault protection system.

FAQs

  • Q: How is this product typically installed?
    A: It is intended for Panel / Base Mounted in industrial control cabinets.
  • Q: Where is it commonly used?
    A: It is used in automation and control panels where dependable switching, monitoring, or indication is required.
MountingDIN Rail
Size20mm
ProtectionIP20, IP40
Weight0.24
Type File Name
Data Sheet GICEarthLeakageRelaysandCBCT's.pdf

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