Novatek Relay THREE PHASE RELAY, voltage control

The voltage relay RNPP-311M is designed for the protection of three-phase loads against the main types of faults in the power network. It safeguards against issues such as:

• Leakage of the valid value of voltage beyond allowable limits
• Violation of phase sequence and phase bonding
• Violation of phase completeness and uniformity of the network voltage

The device monitors the main parameters of the power system and disconnects the load in case of deviations. LEDs on the front panel of the relay indicate:

• Presence of voltage in the network
• State of the load (switched on or off)
• Type of the resulting average

Adjustment potentiometers allow the user to set:

• The limit value of the minimum/maximum permissible voltage (as a percentage of the nominal voltage)
• The time delay for switching on the load after the mains parameters are restored
• The starting time for switching off the load in case of any type of mains voltage failure

The user can select the type of 380/400 V network to be controlled using the switching devices on the front panel and can also enable or disable the control of the following network parameters:

• Phase sequence and phase bonding
• Phase completeness and network voltage uniformity
• Voltage reduction
• Voltage increase.