MV protective relay used in medium voltage networks which is activated when the electrical quantity changed such as voltage and current or physical quantity like thermal degree and oil move and it leads to start other devices and at last break the circuit. These relays which include Control relays and Multi Function Protection Relays, are offered in different models such as feeder protection , motor and transformer protection , differential and distance protection , overcurrent and overload protection , Station Controller، Bay Controller , Synchro-check , frequency load shedding , automatic voltage regulator and alarm unit . MV protective relay are used to control of power equipment in a power plant , post , refineries , etc. Borna niroo karan company(Bornika) is the representative of Ziegler and Sprecher on buying, selling, consulting services for automation systems and protective relays including MV protective relay.

Product list of MV protective relay

Sprecher compact line protection SPRECON-E-P DS..6-0

Sprecher compact line protection SPRECON-E-P DS..6-0

With SPRECON-E-P DS6-0 Sprecher Automation offers a compact line of overcurrent-time protection devices . The compact SPRECON-E-P DS6-0 protection devices are equipped with standardised hardware modules . The standard basic functionalities can be extended by packages which include additional protection functions .

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Sprecher line protection SPRECON-E-P DS..6-2

Sprecher line protection SPRECON-E-P DS..6-2

The overcurrent-time protection acts as the main protection function . The devices include standardised hardware modules and firmware . They all provide protection functions of the same range . Beside typical protection functions and measured-value collection , protection devices also feature control of circuit-breakers .

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Transient Earth Fault Relay type EWR22

Transient Earth Fault Relay type EWR22

Transient earth fault relay type EWR22 monitors each feeder of the bus bar and signal transient earth faults and transient earth faults with continuous earth faults. The different features of the relay and the easy change of parameters offer an optimal adaptation to the system.

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Earth Fault Detection Relay type EOR-D

Earth Fault Detection Relay type EOR-D

Earth Fault Detection Relay type EOR-D is used To exploit the advantages of each fault detection method in different fault situations.and up to 16 feeders can be monitored by using a single EOR system.

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Sprecher motor protection SPRECON-E-P DQ..Series

Sprecher motor protection SPRECON-E-P DQ..Series

SPRECON-E-P DQ..6 devices provide differential protection for transformers and motors. The devices include standardised hardware modules and firmware . Beside typical protection functions and measured-value collection , protection devices also feature control of circuit-breakers . all operations can be accomplished with the detachable HMI control panel . Hence, protection configurations can be locally carried out beside usage of the operating program .

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Sprecher Transformer protection SPRECON-E-P DQ..Series

Sprecher Transformer protection SPRECON-E-P DQ..Series

SPRECON-E-P DQ..6 devices provide differential protection for transformers and motors. The devices include standardised hardware modules and firmware . Beside typical protection functions and measured-value collection , protection devices also feature control of circuit-breakers . all operations can be accomplished with the detachable HMI control panel . Hence, protection configurations can be locally carried out beside usage of the operating program .

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 A.Eberle Transformer-Monitoring Relay type REG-DMA

A.Eberle Transformer-Monitoring Relay type REG-DMA

A.Eberle Transformer-Monitoring Relay type REG-DMA, is one of the transformer relays and has three operation modes. one is transducer mode, others are recorder modes.

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A.eberle OLTC control & transformer monitoring relay type REG-DA

A.eberle OLTC control & transformer monitoring relay type REG-DA

The REG-DA relay for OLTC control & Transformer Monitoring is used to perform both complex and simple measurement, control and regulation tasks on tap-changing transformers. It has 5 different operational modes.

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Sprecher Distance Protection SPRECON-E-P DD..6-Series

Sprecher Distance Protection SPRECON-E-P DD..6-Series

The distance protection acts as the main protection function . These relays can be used to protect transmission lines up to 132kV . The devices include standardised hardware modules and firmware . Beside typical protection functions and measured-value collection , protection devices also feature control of circuit-breakers . The devices can be also used as back-up protection for overhead lines or cables .

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Sprecher Control SPRECON-E-C Series

Sprecher Control SPRECON-E-C Series

Modern automation , control and remote control systems have become essential for optimised and secure control and monitoring of processes regarding power distribution and industrial networks . Depending on the specific field of application , different requirements have to be met by the devices .

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Sprecher Synchro-check SPRECON-E-C-SYNC

Sprecher Synchro-check SPRECON-E-C-SYNC

The synchro-check device measures two voltages with regard to phase, frequency and voltage difference in order to interconnect grids which are under voltage . Various conditions can be defined for command output blocking . Beside application of SPRECON-E-C-SYNC as a stand-alone device, the synchro-check functionality can be also integrated into a SPRECON-E-C bay computer together with other control functions .

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Sprecher Control SPRECON-E-C-FLS( frequency load shedding )

Sprecher Control SPRECON-E-C-FLS( frequency load shedding )

With frequency-based load shedding , consumers can be automatically disconnected from the power network on the occurence of frequency reduction . This function avoids network splitting as well as switching-off power plant units . Hence, the existing power network can be sustained .

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