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The voltage relay RNPP-311M 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 violations and phase sticking;
violations 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 LEDs on the front panel of the relay indicate:
the presence of voltage in the network;
load status (enabled or disabled);
type of accident.
Adjustment potentiometers allow the user to set:
threshold of the minimum / maximum allowable voltage value (as a percentage of the rated voltage);
the delay in the time of switching on the load after the restoration of the network parameters;
response time of load disconnection for all types of mains voltage failures.
Using the switches on the front panel of the device, the user can select the type of 400 / 415 V network to be monitored, as well as enable or disable the control of the following network parameters:
phase sequence and sticking;
full-phase and symmetry of the mains voltage;
voltage drop;
voltage increase.
Appropriate combinations of switch positions allow RNPP-311M to operate in various modes:
full voltage control mode;
minimum/maximum voltage control mode;
minimum voltage control mode;
maximum voltage control mode;
phase presence control mode;
control mode for incorrect sequence and presence of phase sticking;
phase imbalance control mode.
Phase presence monitoring is maintained in any position of the switches, including when they are in the OFF position.
Possibility of connection of operational power supply 24 V is provided (under the order).