Rec15-25 Product Guide
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(ZEp TAVRIDA ELECTRIC Excellence in Engineering AUTOMATIC CIRCUIT RECLOSER

This Product Guide describes automatic circuit reclosers manufactured by Tavrida Electric. Tavrida Electric autoreclosers are designed for overhead distribution lines and outdoor substation switchgear with rated voltage up to 27kV. Important! Due to continuous product improvement, specifications and design are subject to change without notice. The main components of the autorecloser are: Outdoor Switching Module (OSM) The air insulated OSM incorporates a Tavrida Electric vacuum circuit breaker with per phase magnetic actuators housed in a tank made of corrosion resistant aluminum alloy. Six...

1.1 Abbreviations ABR Automatic Backfeed Restoration AT Auxiliary Transformer BAT Battery BF Bolted Fault BTM Bluetooth Module CC Control Cable (Umbilical) CCV Close condition verifier CLP Cold Load Pickup CPM Control Panel Module CT Current Transformer CU Current unbalance D Delayed EF Earth Fault protection element EF1 Low set Earth Fault protection element for Delayed trips EF2 Low set Earth Fault protection element for Instantaneous trips EF3 High set Earth Fault protection element for Instantaneous trips EFID Earth Fault Interruption Detection EL Event Log ETH Ethernet Module HL Hot...

PCI Personal Computer Interface PSFM Power Supply Filter Module RC Recloser Control Cubicle RCM Recloser Control Module RTC Real Time Clock RTU Remote Telecommunication Unit SA Surge Arrester SCADA Supervisory Control And Data Acquisition SD Source Detector SECR Sectionalizer Reclosing SEF Sensitive Earth Fault SEFID Sensitive Earth Fault Interruption Detection SEFR Sensitive Earth Fault with reclosing SI Synchronization indicator TCI Telecommunication Interface TDI TELARM Dispatcher Interface TEL Tavrida Electric UF Under Frequency UV Under Voltage VRC Voltage Reclosing Control VT Voltage...

2.1 Product Application Field Reclosers can be applied in overhead distribution lines. The main applications are:  Clearing transient faults by performing autoreclosing;  Isolating sustained faults in the overhead line network;  Isolating sustained faults in a network where conventional protection coordination is not possible;  Automatic backfeed restoration. The recloser can also be used at outdoor substations feeding overhead distribution lines. It may be used as:  Substation outgoing feeder with autoreclosing functionality;  Substation busbar coupler breaker with backfeed...

Table 1 - Recloser coding description

Each OSM has the following nameplates: • Serial number plate • Parameters nameplate

Nameplate and serial number plate placement The serial number plate contains information about the OSM type and serial number. The nameplate describes OSM technical parameters. RC coding RC5_4M(P1…P12) Recloser control RC type Table 3 – RC coding description Parameter Parameter description Applicable options Code extended Power outlet –15 degrees rated battery Wired Ethernet (RJ45 interface) Local wireless access Optical Ethernet Recloser control cubicle RC5_4 Input-output module –40 degrees rated battery Battery type –25 degrees rated battery Battery ready Firmware version According to...

Each Control cable has a colored tube with serial number.

Figure 5 Control cable tie with serial number

Table 5 - Recloser technical parameters

Figure 6 Life cycle of OSM Table 6 - Sensors parameters 3 The Rogowski coil can measure current in a wide range but for the purpose of over-voltage, protection suppressors are fitted in the secondary circuits. These suppressors chop the signal from the Rogowski coil if primary current exceeds 8 kA. 4 If RC5_4 sensor coefficient settings are configured in accordance with guidelines in Table 6 of this guide. Error is measured at normal climatic conditions. 5 Note that overcurrent protection pickup setting value shall not exceed SEF pickup setting value times 300.

Table 8 - Electromagnetic compatibility 6 Note that additional DC circuit breakers are required. For details refer to section „7.3 Auxiliary supply“ of this guide. 7 Only the battery types described in this guide can be used in the RC.

Table 12 - Input/Output module (IOM) parameters

Table 15 - Bluetooth module (BTM) parameters

5.1 Design 5.1.1 Outdoor Switching Module The OSM is equipped with six high voltage bushings with embedded current and voltage sensors. The bushings are covered by silicone rubber insulation which mount on the top of the tank and provide 500 mm (OSM15) or 860 mm (OSM25) creepage distance. The bushings are marked with the terminal designation X1, X2 or X3 for the default source side and X4, X5 or X6 for the default load side. The source and load side can be reversed in the RC settings if required. Terminal Six HV silicone bushings Current and voltage sensors built into the bushings Vacuum...

and X6 terminals have secondaries connected in series for residual current measurement. Capacitive sensors for voltage measurement are inbuilt in all six bushings. For details on sensor parameters refer to section „4. Technical parameters“ of this guide. 5.1.4 Main Contact Position Indicator The position indicator is located under a protective cover at the bottom of the tank and is clearly visible from the ground. The indicator color is red I when the OSM is closed and green O when it is open. Figure 9 Main contact position indicator 5.1.5 Vacuum Circuit Breaker The essence of OSM is...

Upper terminal Vacuum interrupter Lower terminal Movable contact with bellows Flexible junction shunt Drive insulator Opening and contact pressure spring Magnetic actuator (complete module) Armature Synchronizing shaft Actuator coil Interlocking pins Auxiliary contacts Frame Support insulator Figure 10 View into the Vacuum Circuit Breaker 5.1.6 Control Cable Umbilical_4 control cable connects the OSM actuators, metering and auxiliary wiring to the RC5_4. Control cable wires are each protected by a PVC coated steel armored sleeve. The cable is equipped with a heavy duty 42 pin male connector...