Differential protection relay RH99P designed for electrical safety applications in IT, TT, and TN-S systems. Detects residual currents with configurable settings from 0.03 to 30 A, compatible with toroidal transformers of types A and open types from TOA, TOA A, and TOA L series. Operates with supply voltages of 220–240 V AC at 50/60/400 Hz, with instantaneous timing for 0.03 A and 9 configurable settings from 0 to 4.5 s for higher currents.
Technical Features
- Application: Relay protection
- Mounting support: Front plate
- Earth leakage current: 0.03…30 A
- Differential trip timing adjustment type: Instantaneous for 0.03 A; 9 configurable settings from 0…4.5 s for 0.03…30 A
- Rated supply voltage: 220...240 V AC 50/60 Hz 55...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: IT TT TN-S
- Voltage surge resistance: 8 kV
- Reset: Manual
- Test function: Local and remote
- Monitoring: Electronic components - cable type: continuous; Power supply - cable type: continuous; Relay/sensor link - cable type: continuous
- Measurement type: Internal earth leakage current measurement, range: 80...100 %
- Adjustment integrity: Protected by tamper-proof cover
- Connections: Terminals for auxiliary power, fault contacts, test and reset, toroidal, voltage presence; flexible and rigid cables of 0.2…2.5 mm² (AWG 24...AWG 12) allowed
- Stripping length: 7 mm
- Torque: 0.6 N·m
- Dimensions: 72 mm (width) x 72 mm (height) x 78 mm (depth)
- Cut-out dimension: 68 x 68 mm
- Weight: 0.3 kg
- Protection degree IP: IP40 (front face), IP30 (sides), IP20 (terminals)
- Impact protection degree IK: IK07
- Overvoltage category: IV
- Electrical shock protection class: Class II
- Electromagnetic compatibility: Conducted and radiated emissions (CISPR 11, Class B); RF immunity (IEC 61000-4-6, Level 3), electrostatic discharge (IEC 61000-4-2, Level 4), high energy surge (IEC 61000-4-5, Level 4), low energy surge (IEC 61000-4-4, Level 4), radiated immunity (IEC 61000-4-3, Level 3)
- Operating ambient temperature: -35…70 °C
- Storage ambient temperature: -55…85 °C
- Relative humidity: 95 % at 55 °C
- Contamination degree: 3
- Sustainable offering status: Green Premium product
- EU RoHS Directive: Compliant
- Mercury-free: Yes
- China RoHS Regulation: Product outside China RoHS scope
- Waste electrical and electronic equipment (WEEE): Must be disposed of via specific systems in the EU
