Relay frequency RF-1 UHL4
| Price: | 1 500 UAH |
| Company: | Lispriborservis |
| Seller: |  Ivan Valer'evich |
| Phones: |  0958186453 Show phone |
| Address: | Ukraine, Luhans'ka Oblast', Lysychans'k |
Relay frequency RF used in devices of relay protection and automation to secure the reduction (RF-1) the frequency of the alternating current.
We all know that frequency is one of the most important indicators
quality of electrical energy.
The decrease in frequency occurs when the lack of active power when
the load power is greater than power generators.
It is typical in the separation of the power system or one
power stations of the total network.
In these circumstances, to prevent further drop in frequency,
you need to quickly eliminate the deficit of active power.
It is possible, on the one hand, to disconnect the load, on the other hand,
increase to maximum capacity of the operating generators and
include
in network backup. Load shedding is automatic
frequency discharge (ACHR). Enable and download of backup generators
(usually hydrogenerators, which can gain full power in
minutes) produced by the device frequency start,
increased capacity of the generators is ensured by the regulators
turbines and boilers.
Relay RF-1 are the main elements of the ACHR, device frequency start
and used for some configuration changes regulators
turbines and boilers. In addition, RF relays are used to start
automatic reclosing (AR) connections that are disabled
ACHR,
after restoring the frequency. The increase in frequency occurs when
there is an excess active power which can also be
the separation of the grid from the network.
Specifications RF-1 and RF-2Limits of set-point changes triggered 50-45 Hz, to return 46 to 51 Hz;
the setpoint for the response time 0,15, 0,3; 0,5 s; return time not more than 0.15;
the change in frequency response when you change the voltage operational current in the range of 0.8÷1,1 Unom or voltage AC operative current within 0,4÷1,3 Unom and simultaneous the change in AC voltage at the input of the relay (terminals 7 and b) the range of 40-130 In no more than 0.2 Hz;
same when changing the AC voltage at the input relay in the range of 20-130 In not more than 0.3 Hz.
General technical data for RF-1 and RF 2: difference between the frequency actuation and return the relay to any gauge of not more than 0.05 Hz (when the use of only one measuring circuit);
In stock - 2pcs.
