RKF-3C
The RKF-3/1-С block is intended for control of tension and current of a three-phase network and protection of the equipment sensitive to accident of a network (engines, three-phase rectifiers).
Provides:
disconnection of three-phase loading from a network at violation of an order of alternation of phases, a distortion of phases, unrationed tension on any of phases and an overload on current (control on two phases with use of transformers of current of XXX/5 A).
Design of system.
–The RKF-3/1-С block is executed in the case for installation on a DIN lath.
– Has the digital display for indication of a condition of the device. Installation of parameters of work is made on the digital display.
– In the lower and top part of the block there are terminal blocks for connections of the block to a network and to the scheme of management. Power supply of the relay it is carried out directly from a controlled network.
Technical characteristics.
Pict.Standard scheme of turning on of the relay of control of the phases RKF-3С
а) inclusion directly
б) with use of transformer current
–The RKF-3/1-С block is executed in the case for installation on a DIN lath.
– Has the digital display for indication of a condition of the device. Installation of parameters of work is made on the digital display.
– In the lower and top part of the block there are terminal blocks for connections of the block to a network and to the scheme of management. Power supply of the relay it is carried out directly from a controlled network.
Technical characteristics.
|
Parameter |
Value |
| Rated working voltage | 220/380 V; 50 Hz |
| Range of parameter setting of the minimum phase tension «U,(V)» turn on | 150-210 V |
| Range of parameter setting of the minimum phase tension «U,(V)» turn off. | 155-215 V |
| Temporary delay of shutdown of the internal P1 relay at undervoltage below the established value | 0-10 s |
| Temporary delay of turning on of the internal P1 relay at normalization of tension | 0-10 s |
| Range of parameter setting of the maximum phase tension of switching off «U,(V)»* | 230-270 V |
| Time of shutdown of the P1 relay at increase of tension is more than established value, no more | 0,02 s |
| The rated measured current on TT1-TT3 entrances (secondary current of the transformer of current) | 5 А |
| The maximum (short-term) measured current on TT1-TT3 entrances, no more | 7,5 А |
| Primary current of the transformer of current | 5; 10; 15; 20; 25; 30; 40; 50; 60; 75; 80; 100; 150; 200; 250; 300; 400; 500 А |
| Temporary delay of switching off of the P2 relay at excess of rated current (corresponds to the characteristic of operation of D) | Depending on the established value of frequency rate of current |
| Range of change of frequency rate of current** | 2…10 |
| Minimum duration of an impulse of current of an overload |
5 ms |
| The maximum switched current of contact of the internal relay (AC1 240B mode) | 10 А |
| Overall dimensions (WхHхD) | 71х90х60 mm |
| Weight |
0,35 kg |
Pict.Standard scheme of turning on of the relay of control of the phases RKF-3С
а) inclusion directly
б) with use of transformer current