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Current Transformers for Relay Protection (Transient State)

Applications

  • Relay protection device

Features

  • Low cost
  • More than 50 standard sizes
  • Non-symmetrical mounting pattern
  • Toroidal silicon steel core and nickel alloy core available
Download Datasheet

Specifications

  • Exterior material:
    PBT (UL flame retardant rating 94-V0)
  • Interior insulation:
    epoxy
  • Isolation current:
    2500V AC for 1 minute
  • Dielectric resistance:
    1000MΩ @ 500V DC
  • Surge withstand (optional) :
    5000V（1.2/50μs standard shock wave）
  • Operating temperature:
    -25 to +55℃ / (optional) -40 to +85℃
  • Frequency:
    50 to 400 Hz
  • Accuracy class:
    current transformers class 0.1,0.2 (as defined in IEC 61869-2 Part 2)
  • RoHS compliant

Product Overview

Product OverviewThe Relay Protective Current Transformer uses an alternating current (AC) because of its relays and has a toroidal core made of either silicon steel or nickel alloy in accordance with UL94 V-0 rated polybutylene terephthalate (PBT) housing. The Relay Protective Current Transformer is rated for Class 0.5/1.0 (IEC) accuracy to ensure a high reliability of operation against transients, which occur within 100 ms ($T_p$). With over 50 designs available and providing a high degree of electrical isolation (2500 V), the Relay Protective Current Transformer also provides superior surge protection (5,000 V) to devices using this transformer. This protective current transformer has an operating temperature range of -25°C to +55°C and is RoHS compliant with a resistance of 1,000 MΩ. It will optimize the performance of devices bearing relay protective current transformers.

Typical Products

Image Part Number Rated Input (A) Turn Ratio Frequency (Hz) Secondary Burden (Ω) Accuracy Class Dimensions (mm) PDF
Image TA1111 5~30 1000:1
2000:1
2500:1 		50 to 400 ≤200 0.1
0.2
0.5 		ID-L-W-H 7.0-22.0-18.0-23.0
Image TA1311 5~80 1000:1
2000:1
2500:1 		50 to 400 ≤800 0.1
0.2
0.5 		ID-L-W-H 7.0-22.0-18.0-23.0
Image Part Number Rated Input (A) Turn Ratio Frequency (Hz) Secondary Burden (Ω) Accuracy Class Dimensions (mm) PDF
Image2 CTT0150 5-150 1：1000
1：2000
1：3000
1：5000 		50 to 400 50-400 0.1
0.2 		15-58-23-45

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    Frequently Asked Questions

    Honeywell needed a stable and highly accurate way to measure current fluctuations in large commercial buildings. Existing sensors often produced noise and drifted over time, creating errors in smart energy dashboards

    Honeywell needed a stable and highly accurate way to measure current fluctuations in large commercial buildings. Existing sensors often produced noise and drifted over time, creating errors in smart energy dashboards

    Honeywell needed a stable and highly accurate way to measure current fluctuations in large commercial buildings. Existing sensors often produced noise and drifted over time, creating errors in smart energy dashboards

    Honeywell needed a stable and highly accurate way to measure current fluctuations in large commercial buildings. Existing sensors often produced noise and drifted over time, creating errors in smart energy dashboards

    Honeywell needed a stable and highly accurate way to measure current fluctuations in large commercial buildings. Existing sensors often produced noise and drifted over time, creating errors in smart energy dashboards