REM620 can be selected to measure currents and voltages either with conventional current and voltage transducers or with current and voltage sensors. The relay variant with conventional transducers is equipped with six phase current inputs, one residual-current input, three phase voltage inputs, one residualvoltage input and one phase-to-phase voltage for syncrocheck input. In addition to current and voltage measurements, the relay basic configuration includes 20 binary inputs and 14 binary outputs. Alternatively also another basic configuration can be selected including in addition to current and voltage measurements, 12 binary inputs and 10 binary outputs and also six RTD inputs and two mA inputs. The phase current inputs and the residual-current inputs are rated 1/5 A, that is, the inputs allow the connection of either 1 A or 5 A secondary current transformers. The optional sensitive residual-current input 0.2/1 A is normally used in applications requiring sensitive earth-fault protection and featuring core balance current transformers. The three phase voltage inputs and the residualvoltage input covers the rated voltages 60...210 V. Both phaseto- phase voltages and phase-to-earth voltages can be connected.
The relay variant equipped with current and voltage sensors has three sensor inputs for the direct connection of combisensors with RJ-45 connectors. Alternatively, separate current and voltage sensors can be used with adapters. Furthermore, the adapters also enable the use of sensors with Twin-BNC connectors. Additionally, the relay includes one conventional residual-current input 0.2/1 A normally used in applications requiring sensitive earth-fault protection and featuring core balance current transformers. In addition to current and voltage measurements, the relay basic configuration includes 16 binary inputs and 14 binary outputs.
As an optional addition, the relay's basic configuration includes one empty slot which can be equipped with one of the following optional modules. The first option, additional binary inputs and outputs module, adds eight binary inputs and four binary outputs to the relay. This option is especially needed when connecting the relay to several controllable objects.The second option, an additional RTD/mA input module, increases the relay with six RTD inputs and two mA inputs when additional sensor measurements for example for temperatures, pressures, levels and so on are of interest with the protected motor. The third option is a high-speed output board including eight binary inputs and three high-speed outputs. The high-speed outputs have a shorter activation time compared to the conventional mechanical output relays, shortening the overall relay operation time by 4...6 ms with very time-critical applications like arc protection. The high-speed outputs are freely configurable in the relay application and not limited to arc protection only.
The rated values of the current and voltage inputs are settable parameters of the relay. In addition, the binary input thresholds are selectable within the range of 16…176 V DC by adjusting the relay’s parameter settings.
All binary input and output contacts are freely configurable with the signal matrix or application configuration functionality of PCM600.
See the Input/output overview table and the terminal diagrams for more information about the inputs and outputs.
If the number of the relay’s own inputs and outputs does not cover all the intended purposes, connecting to an external input or output module, for example RIO600, increases the number of binary inputs and outputs utilizable in the relay configuration. In this case, the external inputs and outputs are connected to the relay via IEC 61850 GOOSE to reach fast reaction times between the relay and RIO600 information. The needed binary input and output connections between the relay and RIO600 units can be configured in a PCM600 tool and then utilized in the relay configuration.
| Default conf. | Order code digit | Analog channels | Binary channels | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 5-6 | 7-8 | CT | VT | Combi sensor | BI | BO | RTD | mA | |
| A | AA/AB | AA | 7 | 5 | - | 20 | 4 PO + 10 SO | 6 | 2 |
| AB | 12 | 4 PO + 6SO | 12 | 4 | |||||
| AC | 20 | 4 PO + 6 SO + 3 HSO | 6 | 2 | |||||
| NN | 12 | 4 PO + 6 SO | 6 | 2 | |||||
| AC/AD | AA | 7 | 5 | - | 28 | 4 PO + 14 SO | - | - | |
| AB | 20 | 4 PO + 10 SO | 6 | 2 | |||||
| AC | 28 | 4 PO + 10 SO + 3 HSO | - | - | |||||
| NN | 20 | 4 PO + 10 SO | - | - | |||||
| B | DA / DB | AA | 1 | - | 3 | 24 | 4 PO + 14 SO | - | - |
| AB | 16 | 4 PO + 10 SO | 6 | 2 | |||||
| AC | 24 | 4 PO + 10 SO + 3 HSO | - | - | |||||
| NN | 16 | 4 PO + 10 SO | - | - | |||||