KE single phase motor protection relay
KE motor protection relay

KE Series single phase motor protection relay

The KE cutting-edge single-phase motor protection relay is designed to safeguard a wide range of motors, including those used in conveyor, compressor, crusher, fan, and pump applications. It offers a comprehensive suite of protection features, including:

  • Thermal overload protection: Prevents overheating of the motor.
  • Earth insulation lockout: Protects against ground faults.
  • Earth leakage and short-circuit protection: Safeguards against electrical faults.
  • Frequency and power factor measurement: Monitors power quality and efficiency.
  • Power measurement (real and apparent): Provides real-time power utilization and consumption data.

 

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This advanced motor protection relay offers a comprehensive suite of protection features, including thermal overload, locked rotor, running stall, vectorial stall, unbalanced current, single phasing, minimum load, earth leakage, short-circuit, and over/under voltage protection. It also includes advanced features like over/under frequency protection, real and apparent power measurement, insulation lock-out, event and fault recording, and three-phase current recording. The relay can be easily configured via software, and it supports Profibus communication for remote monitoring and control.

Feature of KE Series single-phase motor protection relay

  • User-friendly configuration: Easy to set up via a man-machine interface or computer software.
  • Extensive event and fault recording: Stores 2000 event records and 60 last fault records for analysis and troubleshooting.
  • Advanced communication: Supports Profibus communication for remote monitoring and control.
  • Flexible installation: Compact design with integrated CT direct measurement up to 50A, and expandable current range using interposing CTs.
  • Comprehensive protection: Includes overvoltage, Undervoltage, phase rotation, and earth leakage detection with selectable trip curves.
  • Dry run protection: Detects and prevents dry-running conditions.
  • Power measurement: Monitors drive power consumption for energy efficiency optimization.
  • Advanced diagnostics: Provides time and date-stamped event and fault records for maintenance and troubleshooting.
  • Intuitive software: Free configuration software with extensive monitoring, logging, and simulation capabilities.

Technical Specification of KE Series single-phase motor protection relay

Input converter Class 1, rating 0.1VA, Frequency response 40 to 66Hz
Overload Trip Delay Curves Class 3-40 to IEC 60255-8 Specification
Unbalance/single-phasing setting Level setting: 5-50% le(M.F.L); Trip delay: 1 to 10 seconds;
underload Detection Range: 10 to 100% of max load dial
Time delay: 1 to 10 seconds
Priming time available: 1 to 200 seconds
power factor setting: 0, 1 to 1 on minimum load dial
Auto Reset Limiter Auto Reset limited to only 3 times per hour
Maximum Load Current Setting Leve setting accuracy/linearity/repeatability/detect level: 2%
Fault indication OperationL latch on trip
Resetting Fault indication: Latch

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