Basic Overcurrent Protection, Motor Protection, Generators, High Level Differential Protection
High Tech Line Protection for Low, Medium and High Voltage (LV, MV, HV) have a range of protection functions. The protection includes time overcurrent protection, mechanical protection, high quality differential protection.
In addition to simple relays, there are also multifunction devices mounted on the door or in separate cabinets. An adapter is available for mounting on the rear panel.
An intuitive display of output values and error messages is provided via an alphanumeric display and LEDs.
Connections to SCADA systems are achieved through standardized interfaces.
Manual
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| Device | MRI3-I | MRI3-IR | MRI3-IRE | MRI3-IE | MRI3-IER | MRI3-IT | MRI3-ITE | MRIK3-I | MRIK3-IE | MRIK3-ICE | MRIK3-ICX | MRI3-ICE | MRI3-ICX | MRI1-IE | IRI1-ER | |
| Documentation | Manual | Manual | Manual | Manual | Manual | Manual | Manual | Manual | Manual | Manual | Manual | Manual | Manual | Manual | ——- | |
| Line | HTL | HTL | HTL | HTL | HTL | HTL | HTL | HTL | HTL | HTL | HTL | HTL | HTL | HTL | HTL | |
| Current Transformer Inputs(MTP) | 3 | 3 | 4 | 4 | 4 | 3 | 4 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 1 | |
| Voltage transformer inputs(MTN) | – | 3 | 3 | – | 3 | – | – | – | – | – | – | – | – | – | – | |
| Binary inputs | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 5 | 5 | 7 | 7 | 7 | 7 | 2 | – | |
| Relay Output | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 1 | |
| Watchdog relay | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | – | |
| 50/51 | Overcurrent time protection | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | – |
| Transitional stabilization | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |
| 67 | Control overcurrent protection time | – | Yes | Yes | – | – | – | – | – | – | – | – | – | – | – | – |
| 50N/51N | Earth protection | – | – | Yes | Yes | Yes | – | Yes | – | Yes | Yes | – | Yes | – | Yes | Yes |
| 50SN/51SN | Sensitive EF Isolated / Compensated | – | – | – | – | – | – | – | – | – | – | Yes | – | Yes | – | – |
| 50N/51N | Earth resistance / Direct grounding | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| 67N | Ground direction protection | – | – | – | – | Yes | – | – | – | – | – | – | – | – | – | – |
| 49 | Thermal display | – | – | – | – | – | Yes | Yes | – | – | – | – | – | – | – | – |
| 50BF | Electrical safety circuit breaker | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | – |
| 64REF | Differential protection: Ground differential protection | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Yes |
| 79 | Re-energizing the AR relay | – | – | – | – | – | – | – | Yes | Yes | Yes | Yes | – | – | – | – |
| Reset / Block | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | – | |
| Voltage dependent function | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |
| Time data | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | – | – | |
| Parameters | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | – | |
| Error messages | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | – | |
| Record failure | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | – | – | |
| Matrix relay output | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | – | |
| Control and monitoring of the power switch | – | – | – | – | – | – | – | – | – | Yes | Yes | Yes | Yes | – | – | |
| RS485 Open Data Protocol | Yes | Yes | Yes | Yes | Yes | Yes | Yes | – | – | – | – | – | – | Yes | – | |
| Modbus RTU protocol | Optional | Optional | Optional | Optional | Optional | Optional | Optional | Optional | Optional | Yes | Yes | Yes | Ano | Volitelný | – | |
| Profibus DP | Optional | Optional | Optional | Optional | Optional | Optional | Optional | Optional | Optional | Optional | Optional | Optional | Optional | Optional | – |
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| Device | MRN3-1 | MRN3-2 | MRN3-3 | MRU3-1 | MRU3-2 | ||
| Documentation | Manual | Manual | Manual | Manual | Manual | ||
| Line | HTL | HTL | HTL | HTL | HTL | ||
| Current Transformer Inputs (MTP) | – | – | – | – | – | ||
| Voltage Transformer Inputs (MTN) | 3 | 3 | 3 | 3 | 3 | ||
| Binary inputs | 2 | 2 | 2 | 2 | 2 | ||
| Relay Output | 4 | 4 | 4 | 4 | 4 | ||
| Watchdog relay | 1 | 1 | 1 | 1 | 1 | ||
| 50/51 | Overcurrent time protection | – | – | – | – | – | |
| 27/59 | Voltage protection | Yes | Yes | Yes | Yes | Yes | |
| 59N | Residual stress | – | – | – | Yes | Yes | |
| 47 | Phase symmetry | – | – | – | – | Yes | |
| 81O/U | Frequency protection | Yes | Yes | Yes | – | – | |
| 81 | Frequency protection | – | Yes | Yes | – | – | |
| 78 | Vector shift | Yes | – | Yes | – | – | |
| Reset / Block | Yes | Yes | Yes | Yes | Yes | ||
| Voltage dependent function | Yes | Yes | Yes | – | – | ||
| Time data | Yes | Yes | Yes | Yes | Yes | ||
| Parameters | 2 | 2 | 2 | 2 | 2 | ||
| Error messages | Yes | Yes | Yes | Yes | Yes | ||
| Record failure | Yes | Yes | Yes | Yes | Yes | ||
| Matrix relay output | Yes | Yes | Yes | Yes | Yes | ||
| RS485 Open Data Protocol | Yes | Yes | Yes | Yes | Yes | ||
| Modbus RTU Protocol | Optional | Optional | Optional | Optional | Optional | ||
| Profibus DP | Optional | Optional | Optional | Optional | Optional |
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| Device | MRG3 | MRG3-I | MRG3-U0 | MRG3-IE | MRG3-IU0 | MRG3-IER | |
| Documentation | Manual | Manual | Manual | Manual | Manual | Manual | |
| Line | HTL | HTL | HTL | HTL | HTL | HTL | |
| Current Transformer Inputs (MTP) | – | 3 | – | 4 | 3 | 4 | |
| Voltage Transformer Inputs (MTN) | 3 | 3 | 4 | 3 | 4 | 4 | |
| Binary inputs | 2 | 2 | 2 | 2 | 2 | 2 | |
| Relay Output | 4 | 4 | 4 | 4 | 4 | 4 | |
| Watchdog relay | 1 | 1 | 1 | 1 | 1 | 1 | |
| 50/51 | Overcurrent time protection | – | Yes | – | Yes | Yes | Yes |
| 50N/51N | Earth protection | – | – | – | Yes | – | Yes |
| 50N/51N | Earth resistance / Direct groundingí | – | – | – | – | – | Yes |
| 67N | Ground direction protection | – | – | – | – | – | Yes |
| 50BF | Electrical safety circuit breaker | – | Yes | – | Yes | Yes | Yes |
| 27/59 | Voltage protection | Yes | Yes | Yes | Yes | Yes | Yes |
| 59N | Residual stress | – | – | Yes | – | Yes | – |
| 81O/U | Frequency protection | Yes | Yes | Yes | Yes | Yes | Yes |
| 81 | Frequency protection | Yes | Yes | Yes | Yes | Yes | Yes |
| 78 | Vector shift | Yes | Yes | Yes | Yes | Yes | Yes |
| Reset / Block | Yes | Yes | Yes | Yes | Yes | Yes | |
| Voltage dependent function | Yes | Yes | Yes | Yes | Yes | Yes | |
| Time data | Yes | Yes | Yes | Yes | Yes | Yes | |
| Parameters | 2 | 2 | 2 | 2 | 2 | 2 | |
| Error messages | Yes | Yes | Yes | Yes | Yes | Yes | |
| Record failure | Yes | Yes | Yes | Yes | Yes | Yes | |
| Matrix relay output | Yes | Yes | Yes | Yes | Yes | Yes | |
| RS485 Open Data Protocol | Yes | Yes | Yes | Yes | Yes | Yes | |
| Modbus RTU Protocol | Optional | Optional | Optional | Optional | Optional | Optional | |
| Profibus DP | Optional | Optional | Optional | Optional | Optional | Optional |
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| 1 | Device | MRP2-3IU | MRP2-R3IU | MRR1 | MRQ1 | |||
| Documentation | Manual | Manual | Manual | Manual | ||||
| Line | HTL | HTL | HTL | HTL | ||||
| Current Transformer Inputs (MTP) | 3 | 3 | – | 1 | ||||
| Voltage Transformer Inputs (MTN) | 3 | 3 | – | 3 | ||||
| Binary inputs | 2 | 2 | 2 | 2 | ||||
| Relay Output | 4 | 4 | 4 | 4 | ||||
| Watchdog relay | 1 | 1 | 1 | 1 | ||||
| 50BF | Electrical safety circuit breaker | Yes | Yes | – | – | |||
| 32/37 | Directional power | Yes | Yes | – | – | |||
| 64N | Rotor earth protection | – | – | Yes | – | |||
| 40/76 | Excited current protection | – | – | Yes | – | |||
| Fault diode | – | – | Yes | – | ||||
| 46 | Negative sequential protection | – | – | – | – | |||
| 40 | Running missing protection | – | – | – | Yes | |||
| Reset / Block | Yes | Yes | Yes | Yes | ||||
| Voltage dependent function | Yes | Yes | – | – | ||||
| Parameters | 1 | 1 | 1 | 1 | ||||
| Error messages | Yes | Yes | – | – | ||||
| Matrix relay output | Yes | Yes | Yes | – | ||||
| RS485 Open Data Protocol | Yes | Yes | Yes | Yes | ||||
| Modbus RTU Protocol | Optional | Optional | – | – |
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| Device | MRM3-2I | MRM3-2IE | |
| Documentation | Manual | Manual | |
| Line | HTL | HTL | |
| Current Transformer Inputs (MTP) | 3 | 4 | |
| Binary inputs | 7 | 7 | |
| Relay Output | 4 | 4 | |
| Watchdog relay | 1 | 1 | |
| 50/51 | Overcurrent time protection | Yes | Yes |
| 50N/51N | Earth protection | – | Yes |
| 49 | Thermal display | Yes | Yes |
| 50BF | Electrical safety circuit breaker | Yes | Yes |
| 46 | Negative sequential protection | Yes | Yes |
| 51 | Motor protection: Blocked rotor | Yes | Yes |
| 48 | Motor protection: Incomplete start | Yes | Yes |
| 66 | Motor protection: Max. Start number | Yes | Yes |
| 37 | Motor Protection: Undercurrent | Yes | Yes |
| 49 | Motor Protection: Thermal Protection | Yes | Yes |
| Reset / Block | Yes | Yes | |
| Time data | Yes | Yes | |
| Parameters | 2 | 2 | |
| Error Troubleshooting | Yes | Yes | |
| Record failure | Yes | Yes | |
| Matrix relay output | Yes | Yes | |
| RS485 Open Data Protocol | Yes | Yes | |
| Modbus RTU Protocol | Optional | Optional | |
| Profibus DP | Optional | – |
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| Device | MRA1 | MRL1 | MRT1 | ||
| Documentation | Manual | Manual | Manual | ||
| Line | HTL | HTL | HTL | ||
| Binary inputs | 1 | 4 | – | ||
| Relay Output | 2 | 4 | – | ||
| Watchdog relay | – | – | – | ||
| 50BF | Overcurrent time protection | – | – | – | |
| Re-energizing the relay | – | – | – | ||
| Reset / Block | – | – | – | ||
| Parameters | – | – | – | ||
| 74TC | Check the control circuit | Yes | – | – | |
| 86 | Auxiliary relay | – | Yes | – | |
| Test block | – | – | Yes | ||
| Capacitor storage | – | – | – | ||
| RS485 Open Data Protocol | – | – | – |
