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The voltage relay RNPP-302 is designed to protect three-phase consumers from the main types of accidents in the electrical network, such as:
the output of the effective voltage value beyond the permissible thresholds;
sequence violation and phase sticking;
violation of full-phase and symmetry of the mains voltage.
The device controls the main parameters of the electrical network and, if they deviate, disconnects the load.
The presence of a three-digit seven-segment indicator on the front panel of the device allows you to:
constantly indicate the current value of the voltage in the network;
indicate the type of accident that has occurred;
view (visualize) the setting of modes and parameters.
Using the menu, the user has the ability to set:
mode of indication of voltage values by phases;
relay response mode to a digital signal of remote shutdown;
relay type;
method of setting the voltage deviation;
enable/disable phase imbalance control;
enable/disable phase sequence control;
voltage control mode at the starter terminals;
type of measured voltage;
response threshold for the maximum allowable voltage value;
threshold for the minimum allowable voltage value;
threshold of permissible value of phase imbalance;
reclosing time;
undervoltage shutdown delay time;
overvoltage shutdown delay time;
response delay time for phase imbalance;
response delay time for phase failure;
response delay time for an alarm on a digital input.
The device has an additional alarm relay with output normally open contacts.