Differential Protection Relay RH197M 230V AC

Differential protection relay RH197M 230V AC, designed for earth leakage current detection in TT, TN-S, and IT systems. Mounts on DIN rail and allows configurable sensitivity settings per feeder, with a ground leakage current range of 0.03 to 30 A. Trip is instantaneous for 0.03 A and offers up to 7 configurable timing settings from 0 to 4.5 s for higher values. Compatible with closed-type A and open-type toroidal transformers from the TOA, TOA A, and TOA L ranges.

Technical Features

• Application: Relay protection
• Mounting support: DIN rail
• Earth leakage protection class: Class A
• Adjustment type: Configurable per feeder
• Earth leakage current: 0.03…30 A
• Differential trip timing adjustment type: Instantaneous for 0.03 A; up to 7 configurable settings from 0…4.5 s for 0.03…30 A
• Alarm threshold: 100% and 50%
• Range compatibility: TOA closed differential toroidal type A and open type, TOA A, TOA L
• Conventional thermal current in enclosure: 8 A
• Minimum load: 10 mA at 12 V
• Rated supply voltage: 220...240 V AC 50/60 Hz, 70...110%
• Power consumption: 4 VA
• Supply voltage: 1000 V - AC at 50/60 Hz - cable type: maximum; 1000 V - AC at 400 Hz - cable type: maximum
• Grounding system: TT, TN-S, IT
• Surge voltage resistance: 8 kV
• Reset: Manual and automatic
• Test function: Local and remote
• Monitoring: Electronic components, continuous power supply, continuous relay/sensor link
• Signal contact composition: 1 NO
• Measurement type: Internal earth leakage current measurement, range: 80...100%
• Update time: 0.5 s
• Adjustment integrity: Protected by tamper-proof cover
• Connections - terminals: Auxiliary power, fault contacts, test and reset, toroidal, voltage presence (various cable types and cross-sections: 0.2…2.5 mm² flexible/rigid, AWG 24...AWG 12)
• Stripped cable length: 7 mm
• Torque: 0.6 N·m
• Spacing: 9 mm (8 steps)
• Width: 71.2 mm
• Height: 98.7 mm
• Depth: 65.8 mm
• Weight: 0.3 kg
• Protection degree IP: IP40 (front), IP30 (sides), IP20 (terminals)
• Impact protection degree IK: IK07
• Overvoltage category: IV
• Electrical shock protection class: Class II
• Electromagnetic compatibility: Conducted and radiated emissions (Class B), immunity to RF, ESD, overvoltage, interference
• Relative humidity: 95% at 55 °C
• Contamination degree: 3
• Operating ambient temperature: -25…55 °C
• Storage ambient temperature: -40…85 °C
• EU RoHS Directive: Compliant
• Free of toxic heavy metals: Yes
• Mercury-free: Yes
• RoHS exemptions: Yes
• China RoHS compliance: Proactive declaration (outside legal scope)
• WEEE: Dispose through specific collection systems in the EU